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Posted to commits@juneau.apache.org by ja...@apache.org on 2016/08/01 00:08:05 UTC
[16/51] [partial] incubator-juneau git commit: Initial Juno contents
from IBM JazzHub repo
http://git-wip-us.apache.org/repos/asf/incubator-juneau/blob/7e4f63e6/com.ibm.team.juno.releng/bin/core/com/ibm/juno/core/jena/package.html
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+<!DOCTYPE HTML>
+<!--
+ Licensed Materials - Property of IBM
+ (c) Copyright IBM Corporation 2014. All Rights Reserved.
+
+ Note to U.S. Government Users Restricted Rights:
+ Use, duplication or disclosure restricted by GSA ADP Schedule
+ Contract with IBM Corp.
+ -->
+<html>
+<head>
+ <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+ <style type="text/css">
+ /* For viewing in Page Designer */
+ @IMPORT url("../../../../../../javadoc.css");
+
+ /* For viewing in REST interface */
+ @IMPORT url("../htdocs/javadoc.css");
+ body {
+ margin: 20px;
+ }
+ </style>
+ <script>
+ /* Replace all @code and @link tags. */
+ window.onload = function() {
+ document.body.innerHTML = document.body.innerHTML.replace(/\{\@code ([^\}]+)\}/g, '<code>$1</code>');
+ document.body.innerHTML = document.body.innerHTML.replace(/\{\@link (([^\}]+)\.)?([^\.\}]+)\}/g, '<code>$3</code>');
+ }
+ </script>
+</head>
+<body>
+<p>Jena-based RDF serialization and parsing support</p>
+<script>
+ function toggle(x) {
+ var div = x.nextSibling;
+ while (div != null && div.nodeType != 1)
+ div = div.nextSibling;
+ if (div != null) {
+ var d = div.style.display;
+ if (d == 'block' || d == '') {
+ div.style.display = 'none';
+ x.className += " closed";
+ } else {
+ div.style.display = 'block';
+ x.className = x.className.replace(/(?:^|\s)closed(?!\S)/g , '' );
+ }
+ }
+ }
+</script>
+
+<a id='TOC'></a><h5 class='toc'>Table of Contents</h5>
+<ol class='toc'>
+ <li><p><a class='doclink' href='#RdfOverview'>RDF support overview</a></p>
+ <ol>
+ <li><p><a class='doclink' href='#RdfOverviewExample'>Example</a></p>
+ </ol>
+ <li><p><a class='doclink' href='#RdfSerializer'>RdfSerializer class</a></p>
+ <ol>
+ <li><p><a class='doclink' href='#Namespaces'>Namespaces</a></p>
+ <li><p><a class='doclink' href='#UriProperties'>URI properties</a></p>
+ <li><p><a class='doclink' href='#BeanAnnotations'>@Bean and @BeanProperty annotations</a></p>
+ <li><p><a class='doclink' href='#Collections'>Collections</a></p>
+ <li><p><a class='doclink' href='#RootProperty'>Root property</a></p>
+ <li><p><a class='doclink' href='#TypedLiterals'>Typed literals</a></p>
+ <li><p><a class='doclink' href='#Recursion'>Non-tree models and recursion detection</a></p>
+ <li><p><a class='doclink' href='#SerializerConfigurableProperties'>Configurable properties</a></p>
+ <li><p><a class='doclink' href='#SerializerOtherNotes'>Other notes</a></p>
+ </ol>
+ <li><p><a class='doclink' href='#RdfParser'>RdfParser class</a></p>
+ <ol>
+ <li><p><a class='doclink' href='#GenericParsing'>Parsing into generic POJO models</a></p>
+ <li><p><a class='doclink' href='#ParserConfigurableProperties'>Configurable properties</a></p>
+ <li><p><a class='doclink' href='#ParserOtherNotes'>Other notes</a></p>
+ </ol>
+ <li><p><a class='doclink' href='#RestApiSupport'>REST API support</a></p>
+ <ol>
+ <li><p><a class='doclink' href='#RestServerSupport'>REST server support</a></p>
+ <ol>
+ <li><p><a class='doclink' href='#RestServletJenaDefault'>Using RestServletJenaDefault</a></p>
+ <li><p><a class='doclink' href='#RestServlet'>Using RestServlet with annotations</a></p>
+ <li><p><a class='doclink' href='#DefaultJenaProvider'>Using JAX-RS DefaultJenaProvider</a></p>
+ <li><p><a class='doclink' href='#BaseProvider'>Using JAX-RS BaseProvider with annotations</a></p>
+ </ol>
+ <li><p><a class='doclink' href='#RestClientSupport'>REST client support</a></p>
+ </ol>
+</ol>
+
+
+<!-- ======================================================================================================== -->
+<a id="RdfOverview"></a>
+<h2 class='topic' onclick='toggle(this)'>1 - RDF support overview</h2>
+<div class='topic'>
+ <p>
+ Juno supports serializing and parsing arbitrary POJOs to and from the following RDF formats:
+ </p>
+ <ul>
+ <li>RDF/XML
+ <li>Abbreviated RDF/XML
+ <li>N-Triple
+ <li>Turtle
+ <li>N3
+ </ul>
+ <p>
+ Juno can serialize and parse instances of any of the following POJO types:
+ </p>
+ <ul>
+ <li>Java primitive objects (e.g. <code>String</code>, <code>Integer</code>, <code>Boolean</code>, <code>Float</code>).
+ <li>Java collections framework objects (e.g. <code>HashSet</code>, <code>TreeMap</code>) containing anything on this list.
+ <li>Multi-dimensional arrays of any type on this list.
+ <li>Java Beans with properties of any type on this list.
+ <li>Classes with standard transformations to and from <code>Strings</code> (e.g. classes containing <code>toString()</code>,
+ <code>fromString()</code>, <code>valueOf()</code>, <code>constructor(String)</code>).
+ </ul>
+ <p>
+ In addition to the types shown above, Juno includes the ability to define filters to transform non-standard object and
+ property types to serializable forms (e.g. to transform <code>Calendars</code> to and from <code>ISO8601</code> strings,
+ or <code>byte[]</code> arrays to and from base-64 encoded strings).<br>
+ These filters can be associated with serializers/parsers, or can be associated with classes or bean properties through type and method annotations.
+ </p>
+ <p>
+ Refer to <a href='../package-summary.html#PojoCategories' class='doclink'>POJO Categories</a> for a complete definition of supported POJOs.
+ </p>
+ <h6 class='topic'>Prerequisites</h6>
+ <p>
+ Juno uses the Jena library for these formats. <br>
+ The predefined serializers and parsers convert POJOs to and from RDF models and then uses Jena to convert them to and from the various RDF languages.
+ </p>
+ <p>
+ Since Juno is 100% pure IBM code, the Jena libraries must be provided on the classpath separately if you plan on making use of the RDF support.
+ </p>
+ The minimum list of required jars are:
+ </p>
+ <ul>
+ <li><code>jena-core-2.7.1.jar</code>
+ <li><code>jena-iri-0.9.2.jar</code>
+ <li><code>log4j-1.2.16.jar</code>
+ <li><code>slf4j-api-1.6.4.jar</code>
+ <li><code>slf4j-log4j12-1.6.4.jar</code>
+ </ul>
+
+ <!-- ======================================================================================================== -->
+ <a id="RdfOverviewExample"></a>
+ <h3 class='topic' onclick='toggle(this)'>1.1 - RDF support overview - example</h3>
+ <div class='topic'>
+ <p>
+ The example shown here is from the Address Book resource located in the <code>com.ibm.juno.sample.war</code> application.
+ </p>
+ <p>
+ The POJO model consists of a <code>List</code> of <code>Person</code> beans, with each <code>Person</code> containing
+ zero or more <code>Address</code> beans.
+ </p>
+ <p>
+ When you point a browser at <code>/sample/addressBook</code>, the POJO is rendered as HTML:
+ </p>
+ <img class='bordered' src="doc-files/Example_HTML.png">
+ <p>
+ By appending <code>?Accept=<i>mediaType</i>&plainText=true</code> to the URL, you can view the data in the various RDF supported formats.
+ </p>
+
+ <h6 class='figure'>RDF/XML</h6>
+ <img class='bordered' src="doc-files/Example_RDFXML.png">
+
+ <h6 class='figure'>Abbreviated RDF/XML</h6>
+ <img class='bordered' src="doc-files/Example_RDFXMLABBREV.png">
+
+ <h6 class='figure'>N-Triple</h6>
+ <img class='bordered' src="doc-files/Example_NTriple.png">
+
+ <h6 class='figure'>Turtle</h6>
+ <img class='bordered' src="doc-files/Example_Turtle.png">
+
+ <h6 class='figure'>N3</h6>
+ <img class='bordered' src="doc-files/Example_N3.png">
+ </div>
+</div>
+
+<!-- ======================================================================================================== -->
+<a id="RdfSerializer"></a>
+<h2 class='topic' onclick='toggle(this)'>2 - RdfSerializer class</h2>
+<div class='topic'>
+ <p>
+ The {@link com.ibm.juno.core.jena.RdfSerializer} class is the top-level class for all Jena-based serializers.<br>
+ Language-specific serializers are defined as inner subclasses of the <code>RdfSerializer</code> class:
+ </p>
+ <ul>
+ <li>{@link com.ibm.juno.core.jena.RdfSerializer.Xml}
+ <li>{@link com.ibm.juno.core.jena.RdfSerializer.XmlAbbrev}
+ <li>{@link com.ibm.juno.core.jena.RdfSerializer.NTriple}
+ <li>{@link com.ibm.juno.core.jena.RdfSerializer.Turtle}
+ <li>{@link com.ibm.juno.core.jena.RdfSerializer.N3}
+ </ul>
+ <p>
+ Static reusable instances of serializers are also provided with default settings:
+ </p>
+ <ul>
+ <li>{@link com.ibm.juno.core.jena.RdfSerializer#DEFAULT_XML}
+ <li>{@link com.ibm.juno.core.jena.RdfSerializer#DEFAULT_XMLABBREV}
+ <li>{@link com.ibm.juno.core.jena.RdfSerializer#DEFAULT_TURTLE}
+ <li>{@link com.ibm.juno.core.jena.RdfSerializer#DEFAULT_NTRIPLE}
+ <li>{@link com.ibm.juno.core.jena.RdfSerializer#DEFAULT_N3}
+ </ul>
+ <p>
+ Abbreviated RDF/XML is currently the most widely accepted and readable RDF syntax, so the examples shown here will use that format.
+ </p>
+ <p>
+ For brevity, the examples will use public fields instead of getters/setters to reduce the size of the examples.<br>
+ In the real world, you'll typically want to use standard bean getters and setters.
+ </p>
+ <p>
+ To start off simple, we'll begin with the following simplified bean and build it up.
+ </p>
+ <p class='bcode'>
+ <jk>public class</jk> Person {
+ <jc>// Bean properties</jc>
+ <jk>public int</jk> <jf>id</jf>;
+ <jk>public</jk> String <jf>name</jf>;
+
+ <jc>// Bean constructor (needed by parser)</jc>
+ <jk>public</jk> Person() {}
+
+ <jc>// Normal constructor</jc>
+ <jk>public</jk> Person(<jk>int</jk> id, String name) {
+ <jk>this</jk>.<jf>id</jf> = id;
+ <jk>this</jk>.<jf>name</jf> = name;
+ }
+ }
+ </p>
+ <p>
+ The following code shows how to convert this to abbreviated RDF/XML:
+ </p>
+ <p class='bcode'>
+ <jc>// Create a new serializer with readable output.</jc>
+ RdfSerializer s = <jk>new</jk> RdfSerializer.XmlAbbrev().setProperty(RdfProperties.<jsf>RDF_rdfxml_tab</jsf>, 3);
+
+ <jc>// Create our bean.</jc>
+ Person p = <jk>new</jk> Person(1, <js>"John Smith"</js>);
+
+ <jc>// Serialize the bean to RDF/XML.</jc>
+ String rdfXml = s.serialize(p);
+ </p>
+ <p>
+ It should be noted that serializers can also be created by cloning existing serializers:
+ </p>
+ <p class='bcode'>
+ <jc>// Create a new serializer with readable output by cloning an existing serializer.</jc>
+ RdfSerializer s = RdfSerializer.<jsf>DEFAULT_XMLABBREV</jsf>.clone().setProperty(RdfProperties.<jsf>RDF_rdfxml_tab</jsf>, 3);
+ </p>
+ <p>
+ This code produces the following output:
+ </p>
+ <p class='bcode'>
+ <xt><rdf:RDF</xt>
+ <xa>xmlns:rdf</xa>=<xs>"http://www.w3.org/1999/02/22-rdf-syntax-ns#"</xs>
+ <xa>xmlns:j</xa>=<xs>"http://www.ibm.com/juno/"</xs>
+ <xa>xmlns:jp</xa>=<xs>"http://www.ibm.com/junobp/"</xs><xt>></xt>
+ <xt><rdf:Description></xt>
+ <xt><jp:id></xt>1<xt></jp:id></xt>
+ <xt><jp:name></xt>John Smith<xt></jp:name></xt>
+ <xt></rdf:Description></xt>
+ <xt></rdf:RDF></xt>
+ </p>
+ <p>
+ Notice that we've taken an arbitrary POJO and converted it to RDF.<br>
+ The Juno serializers and parsers are designed to work with arbitrary POJOs without requiring
+ any annotations.<br>
+ That being said, several annotations are provided to customize how POJOs are handled to produce usable RDF.
+ </p>
+
+ <!-- ======================================================================================================== -->
+ <a id="Namespaces"></a>
+ <h3 class='topic' onclick='toggle(this)'>2.1 - Namespaces</h3>
+ <div class='topic'>
+ <p>
+ You'll notice in the previous example that Juno namespaces are used to represent bean property names.<br>
+ These are used by default when namespaces are not explicitly specified.
+ </p>
+ <p>
+ The <code>juno</code> namespace is used for generic names for objects that don't have namespaces associated with them.
+ </p>
+ <p>
+ The <code>junobp</code> namespace is used on bean properties that don't have namespaces associated with them.
+ </p>
+ <p>
+ The easiest way to specify namespaces is through annotations.<br>
+ In this example, we're going to associate the prefix <code>'per'</code> to our bean class and all
+ properties of this class.<br>
+ We do this by adding the following annotation to our class:
+ </p>
+ <p class='bcode'>
+ <ja>@Rdf</ja>(prefix=<js>"per"</js>)
+ <jk>public class</jk> Person {
+ </p>
+ <p>
+ In general, the best approach is to define the namespace URIs at the package level using a <code>package-info.java</code>
+ class, like so:
+ </p>
+ <p class='bcode'>
+ <jc>// RDF namespaces used in this package</jc>
+ <ja>@RdfSchema</ja>(
+ prefix=<js>"ab"</js>,
+ rdfNs={
+ <ja>@RdfNs</ja>(prefix=<js>"ab"</js>, namespaceURI=<js>"http://www.ibm.com/addressBook/"</js>),
+ <ja>@RdfNs</ja>(prefix=<js>"per"</js>, namespaceURI=<js>"http://www.ibm.com/person/"</js>),
+ <ja>@RdfNs</ja>(prefix=<js>"addr"</js>, namespaceURI=<js>"http://www.ibm.com/address/"</js>),
+ <ja>@RdfNs</ja>(prefix=<js>"mail"</js>, namespaceURI=<js>"http://www.ibm.com/mail/"</js>)
+ }
+ )
+ <jk>package</jk> com.ibm.sample.addressbook;
+ <jk>import</jk> com.ibm.juno.core.xml.annotation.*;
+ </p>
+ <p>
+ This assigns a default prefix of <js>"ab"</js> for all classes and properties within the project,
+ and specifies various other prefixes used within this project.
+ </p>
+ <p>
+ Now when we rerun the sample code, we'll get the following:
+ </p>
+ <p class='bcode'>
+ <xt><rdf:RDF</xt>
+ <xa>xmlns:rdf</xa>=<xs>"http://www.w3.org/1999/02/22-rdf-syntax-ns#"</xs>
+ <xa>xmlns:j</xa>=<xs>"http://www.ibm.com/juno/"</xs>
+ <xa>xmlns:jp</xa>=<xs>"http://www.ibm.com/junobp/"</xs>
+ <xa>xmlns:per</xa>=<xs>"http://www.ibm.com/person/"</xs><xt>></xt>
+ <xt><rdf:Description></xt>
+ <xt><per:id></xt>1<xt></per:id></xt>
+ <xt><per:name></xt>John Smith<xt></per:name></xt>
+ <xt></rdf:Description></xt>
+ <xt></rdf:RDF></xt>
+ </p>
+ <p>
+ Namespace auto-detection ({@link com.ibm.juno.core.xml.XmlSerializerProperties#XML_autoDetectNamespaces}) is enabled
+ on serializers by default.<br>
+ This causes the serializer to make a first-pass over the data structure to look for namespaces.<br>
+ In high-performance environments, you may want to consider disabling auto-detection and providing an explicit list of namespaces to the serializer
+ to avoid this scanning step.
+ </p>
+ <p class='bcode'>
+ <jc>// Create a new serializer, but manually specify the namespaces.</jc>
+ RdfSerializer s = <jk>new</jk> RdfSerializer.XmlAbbrev()
+ .setProperty(RdfProperties.<jsf>RDF_rdfxml_tab</jsf>, 3)
+ .setProperty(XmlSerializerProperties.<jsf>XML_autoDetectNamespaces</jsf>, <jk>false</jk>)
+ .setProperty(XmlSerializerProperties.<jsf>XML_namespaces</jsf>, <js>"{per:'http://www.ibm.com/person/'}"</js>);
+ </p>
+ <p>
+ This code change will produce the same output as before, but will perform slightly better since it doesn't have to crawl the POJO tree before serializing the result.
+ </p>
+ </div>
+
+ <!-- ======================================================================================================== -->
+ <a id="UriProperties"></a>
+ <h3 class='topic' onclick='toggle(this)'>2.2 - URI properties</h3>
+ <div class='topic'>
+ <p>
+ Bean properties of type <code>java.net.URI</code> or <code>java.net.URL</code> have special meaning to the RDF serializer.<br>
+ They are interpreted as resource identifiers.
+ </p>
+ <p>
+ In the following code, we're adding 2 new properties.<br>
+ The first property is annotated with <ja>@BeanProperty</ja> to identify that this property is the
+ resource identifier for this bean.<br>
+ The second unannotated property is interpreted as a reference to another resource.
+ </p>
+ <p class='bcode'>
+ <jk>public class</jk> Person {
+
+ <jc>// Bean properties</jc>
+ <ja>@BeanProperty</ja>(beanUri=<jk>true</jk>)
+ <jk>public</jk> URI <jf>uri</jf>;
+
+ <jk>public</jk> URI <jf>addressBookUri</jf>;
+
+ ...
+
+ <jc>// Normal constructor</jc>
+ <jk>public</jk> Person(<jk>int</jk> id, String name, String uri, String addressBookUri) <jk>throws</jk> URISyntaxException {
+ <jk>this</jk>.<jf>id</jf> = id;
+ <jk>this</jk>.<jf>name</jf> = name;
+ <jk>this</jk>.<jf>uri</jf> = <jk>new</jk> URI(uri);
+ <jk>this</jk>.<jf>addressBookUri</jf> = <jk>new</jk> URI(addressBookUri);
+ }
+ }
+ </p>
+ <p>
+ We alter our code to pass in values for these new properties.
+ </p>
+ <p class='bcode'>
+ <jc>// Create our bean.</jc>
+ Person p = <jk>new</jk> Person(1, <js>"John Smith"</js>, <js>"http://sample/addressBook/person/1"</js>, <js>"http://sample/addressBook"</js>);
+ </p>
+ <p>
+ Now when we run the sample code, we get the following:
+ </p>
+ <p class='bcode'>
+ <xt><rdf:RDF</xt>
+ <xa>xmlns:rdf</xa>=<xs>"http://www.w3.org/1999/02/22-rdf-syntax-ns#"</xs>
+ <xa>xmlns:j</xa>=<xs>"http://www.ibm.com/juno/"</xs>
+ <xa>xmlns:jp</xa>=<xs>"http://www.ibm.com/junobp/"</xs>
+ <xa>xmlns:per</xa>=<xs>"http://www.ibm.com/person/"</xs><xt>></xt>
+ <xt><rdf:Description <b><xa>rdf:about</xa>=<xs>"http://sample/addressBook/person/1"</xs></b>></xt>
+ <xt><b><per:addressBookUri</xt> <xa>rdf:resource</xa>=<xs>"http://sample/addressBook"</xs><xt>/></b></xt>
+ <xt><per:id></xt>1<xt></per:id></xt>
+ <xt><per:name></xt>John Smith<xt></per:name></xt>
+ <xt></rdf:Description></xt>
+ <xt></rdf:RDF></xt>
+ </p>
+ <p>
+ The {@link com.ibm.juno.core.annotation.URI} annotation can also be used on classes and properties
+ to identify them as URLs when they're not instances of <code>java.net.URI</code> or <code>java.net.URL</code>
+ (not needed if <code><ja>@BeanProperty</ja>(beanUri=<jk>true</jk>)</code> is already specified).
+ </p>
+ <p>
+ The following properties would have produced the same output as before. Note that the <ja>@URI</ja> annotation is only needed
+ on the second property.
+ </p>
+ <p class='bcode'>
+ <jk>public class</jk> Person {
+
+ <jc>// Bean properties</jc>
+ <ja>@BeanProperty</ja>(beanUri=<jk>true</jk>) <jk>public</jk> String <jf>uri</jf>;
+
+ <ja>@URI</ja> <jk>public</jk> String <jf>addressBookUri</jf>;
+ </p>
+ <p>
+ Also take note of the {@link com.ibm.juno.core.serializer.SerializerProperties#SERIALIZER_relativeUriBase} and {@link com.ibm.juno.core.serializer.SerializerProperties#SERIALIZER_absolutePathUriBase}
+ settings that can be specified on the serializer to resolve relative and context-root-relative URIs to fully-qualfied URIs.
+ </p>
+ <p>
+ This can be useful if you want to keep the URI authority and context root information out of the bean logic layer.
+ </p>
+ <p>
+ The following code produces the same output as before, but the URIs on the beans are relative.
+ </p>
+ <p class='bcode'>
+ <jc>// Create a new serializer with readable output.</jc>
+ RdfSerializer s = <jk>new</jk> RdfSerializer.XmlAbbrev()
+ .setProperty(RdfProperties.<jsf>RDF_rdfxml_tab</jsf>, 3);
+ .setProperty(SerializerProperties.<jsf>SERIALIZER_relativeUriBase</jsf>, <js>"http://myhost/sample"</js>);
+ .setProperty(SerializerProperties.<jsf>SERIALIZER_absolutePathUriBase</jsf>, <js>"http://myhost"</js>);
+
+ <jc>// Create our bean.</jc>
+ Person p = <jk>new</jk> Person(1, <js>"John Smith"</js>, <js>"person/1"</js>, <js>"/"</js>);
+
+ <jc>// Serialize the bean to RDF/XML.</jc>
+ String rdfXml = s.serialize(p);
+ </p>
+ </div>
+
+ <!-- ======================================================================================================== -->
+ <a id="BeanAnnotations"></a>
+ <h3 class='topic' onclick='toggle(this)'>2.3 - @Bean and @BeanProperty annotations</h3>
+ <div class='topic'>
+ <p>
+ The {@link com.ibm.juno.core.annotation.Bean} and {@link com.ibm.juno.core.annotation.BeanProperty} annotations
+ are used to customize the behavior of beans across the entire framework.<br>
+ In addition to using them to identify the resource URI for the bean shown above, they have various other uses:
+ </p>
+ <ul>
+ <li>Hiding bean properties.
+ <li>Specifying the ordering of bean properties.
+ <li>Overriding the names of bean properties.
+ <li>Associating filters at both the class and property level (to convert non-serializable POJOs to serializable forms).
+ </ul>
+ <p>
+ For example, we now add a <code>birthDate</code> property, and associate a filter with it to transform
+ it to an ISO8601 date-time string in GMT time.<br>
+ By default, <code>Calendars</code> are treated as beans by the framework, which is usually not how you want them serialized.<br>
+ Using filters, we can convert them to standardized string forms.
+ </p>
+ <p class='bcode'>
+ <jk>public class</jk> Person {
+
+ <jc>// Bean properties</jc>
+ <ja>@BeanProperty</ja>(filter=CalendarFilter.ISO8601DTZ.<jk>class</jk>) <jk>public</jk> Calendar birthDate;
+ ...
+
+ <jc>// Normal constructor</jc>
+ <jk>public</jk> Person(<jk>int</jk> id, String name, String uri, String addressBookUri, String birthDate) <jk>throws</jk> Exception {
+ ...
+ <jk>this</jk>.<jf>birthDate</jf> = <jk>new</jk> GregorianCalendar();
+ <jk>this</jk>.<jf>birthDate</jf>.setTime(DateFormat.<jsm>getDateInstance</jsm>(DateFormat.<jsf>MEDIUM</jsf>).parse(birthDate));
+ }
+ }
+ </p>
+ <p>
+ And we alter our code to pass in the birthdate.
+ </p>
+ <p class='bcode'>
+ <jc>// Create our bean.</jc>
+ Person p = <jk>new</jk> Person(1, <js>"John Smith"</js>, <js>"http://sample/addressBook/person/1"</js>, <js>"http://sample/addressBook"</js>, <js>"Aug 12, 1946"</js>);
+ </p>
+ <p>
+ Now when we rerun the sample code, we'll get the following:
+ </p>
+ <p class='bcode'>
+ <xt><rdf:RDF</xt>
+ <xa>xmlns:rdf</xa>=<xs>"http://www.w3.org/1999/02/22-rdf-syntax-ns#"</xs>
+ <xa>xmlns:j</xa>=<xs>"http://www.ibm.com/juno/"</xs>
+ <xa>xmlns:jp</xa>=<xs>"http://www.ibm.com/junobp/"</xs>
+ <xa>xmlns:per</xa>=<xs>"http://www.ibm.com/person/"</xs><xt>></xt>
+ <xt><rdf:Description <xa>rdf:about</xa>=<xs>"http://sample/addressBook/person/1"</xs>></xt>
+ <xt><per:addressBookUri</xt> <xa>rdf:resource</xa>=<xs>"http://sample/addressBook"</xs><xt>/></xt>
+ <xt><per:id></xt>1<xt></per:id></xt>
+ <xt><per:name></xt>John Smith<xt></per:name></xt>
+ <xt><b><per:birthDate></xt>1946-08-12T00:00:00Z<xt></per:birthDate></b></xt>
+ <xt></rdf:Description></xt>
+ <xt></rdf:RDF></xt>
+ </p>
+ </div>
+
+
+ <!-- ======================================================================================================== -->
+ <a id="Collections"></a>
+ <h3 class='topic' onclick='toggle(this)'>2.4 - Collections</h3>
+ <div class='topic'>
+ <p>
+ Collections and arrays are converted to RDF sequences.<br>
+ In our example, let's add a list-of-beans property to our sample class:
+ </p>
+ <p class='bcode'>
+ <jk>public class</jk> Person {
+
+ <jc>// Bean properties</jc>
+ <jk>public</jk> LinkedList<Address> <jf>addresses</jf> = <jk>new</jk> LinkedList<Address>();
+ ...
+ }
+ </p>
+ <p>
+ The <code>Address</code> class has the following properties defined:
+ </p>
+ <p class='bcode'>
+ <ja>@Rdf</ja>(prefix=<js>"addr"</js>)
+ <jk>public class</jk> Address {
+
+ <jc>// Bean properties</jc>
+ <ja>@BeanProperty</ja>(beanUri=<jk>true</jk>) <jk>public</jk> URI <jf>uri</jf>;
+ <jk>public</jk> URI <jf>personUri</jf>;
+
+ <jk>public int</jk> <jf>id</jf>;
+
+ <ja>@Rdf</ja>(prefix=<js>"mail"</js>)
+ <jk>public</jk> String <jf>street</jf>, <jf>city</jf>, <jf>state</jf>;
+
+ <ja>@Rdf</ja>(prefix=<js>"mail"</js>)
+ <jk>public int</jk> <jf>zip</jf>;
+
+ <jk>public boolean</jk> <jf>isCurrent</jf>;
+ }
+ </p>
+ <p>
+ Next, add some quick-and-dirty code to add an address to our person bean:
+ </p>
+ <p class='bcode'>
+ <jc>// Create a new serializer (revert back to namespace autodetection).</jc>
+ RdfSerializer s = <jk>new</jk> RdfSerializer.XmlAbbrev().setProperty(RdfProperties.<jsf>RDF_rdfxml_tab</jsf>, 3);
+
+ <jc>// Create our bean.</jc>
+ Person p = <jk>new</jk> Person(1, <js>"John Smith"</js>, <js>"http://sample/addressBook/person/1"</js>, <js>"http://sample/addressBook"</js>, <js>"Aug 12, 1946"</js>);
+ Address a = <jk>new</jk> Address();
+ a.<jf>uri</jf> = <jk>new</jk> URI(<js>"http://sample/addressBook/address/1"</js>);
+ a.<jf>personUri</jf> = <jk>new</jk> URI(<js>"http://sample/addressBook/person/1"</js>);
+ a.<jf>id</jf> = 1;
+ a.<jf>street</jf> = <js>"100 Main Street"</js>;
+ a.<jf>city</jf> = <js>"Anywhereville"</js>;
+ a.<jf>state</jf> = <js>"NY"</js>;
+ a.<jf>zip</jf> = 12345;
+ a.<jf>isCurrent</jf> = <jk>true</jk>;
+ p.<jf>addresses</jf>.add(a);
+ </p>
+ <p>
+ Now when we run the sample code, we get the following:
+ </p>
+ <p class='bcode'>
+ <xt><rdf:RDF</xt>
+ <xa>xmlns:rdf</xa>=<xs>"http://www.w3.org/1999/02/22-rdf-syntax-ns#"</xs>
+ <xa>xmlns:j</xa>=<xs>"http://www.ibm.com/juno/"</xs>
+ <xa>xmlns:jp</xa>=<xs>"http://www.ibm.com/junobp/"</xs>
+ <xa>xmlns:per</xa>=<xs>"http://www.ibm.com/person/"</xs>
+ <b><xa>xmlns:mail</xa>=<xs>"http://www.ibm.com/mail/"</xs></b>
+ <b><xa>xmlns:addr</xa>=<xs>"http://www.ibm.com/address/"</xs></b><xt>></xt>
+ <xt><rdf:Description <xa>rdf:about</xa>=<xs>"http://sample/addressBook/person/1"</xs>></xt>
+ <xt><per:addressBookUri</xt> <xa>rdf:resource</xa>=<xs>"http://sample/addressBook"</xs><xt>/></xt>
+ <xt><per:id></xt>1<xt></per:id></xt>
+ <xt><per:name></xt>John Smith<xt></per:name></xt>
+ <b><xt><per:addresses></xt>
+ <xt><rdf:Seq></xt>
+ <xt><rdf:li></xt>
+ <xt><rdf:Description <xa>rdf:about</xa>=<xs>"http://sample/addressBook/address/1"</xs>></xt>
+ <xt><addr:personUri <xa>rdf:resource</xa>=<xs>"http://sample/addressBook/person/1"</xs>/></xt>
+ <xt><addr:id></xt>1<xt></addr:id></xt>
+ <xt><mail:street></xt>100 Main Street<xt></mail:street></xt>
+ <xt><mail:city></xt>Anywhereville<xt></mail:city></xt>
+ <xt><mail:state></xt>NY<xt></mail:state></xt>
+ <xt><mail:zip></xt>12345<xt></mail:zip></xt>
+ <xt><addr:isCurrent></xt>true<xt></addr:isCurrent></xt>
+ <xt></rdf:Description></xt>
+ <xt></rdf:li></xt>
+ <xt></rdf:Seq></xt>
+ <xt></per:addresses></xt></b>
+ <xt></rdf:Description></xt>
+ <xt></rdf:RDF></xt>
+ </p>
+ </div>
+
+
+ <!-- ======================================================================================================== -->
+ <a id="RootProperty"></a>
+ <h3 class='topic' onclick='toggle(this)'>2.5 - Root property</h3>
+ <div class='topic'>
+ <p>
+ For all RDF languages, the POJO objects get broken down into simple triplets.<br>
+ Unfortunately, for tree-structured data like the POJOs shown above, this causes the root node of the tree to become lost.<br>
+ There is no easy way to identify that <code>person/1</code> is the root node in our tree once in triplet form, and in
+ some cases it's impossible.
+ </p>
+ <p>
+ By default, the {@link com.ibm.juno.core.jena.RdfParser} class handles this by scanning
+ all the nodes and identifying the nodes without incoming references.<br>
+ However, this is inefficient, especially for large models.<br>
+ And in cases where the root node is referenced by another node in the model by URL, it's not possible to locate the root at all.
+ </p>
+ <p>
+ To resolve this issue, the property {@link com.ibm.juno.core.jena.RdfSerializerProperties#RDF_addRootProperty} was introduced.<br>
+ When enabled, this adds a special <code>root</code> attribute to the root node to make it easy to locate by the parser.
+ </p>
+ <p>
+ To enable, set the <jsf>RDF_addRootProperty</jsf> property to <jk>true</jk> on the serializer:
+ </p>
+ <p class='bcode'>
+ <jc>// Create a new serializer.</jc>
+ RdfSerializer s = <jk>new</jk> RdfSerializer.XmlAbbrev()
+ .setProperty(RdfProperties.<jsf>RDF_rdfxml_tab</jsf>, 3),
+ .setProperty(RdfSerializerProperties.<jsf>RDF_addRootProperty</jsf>, <jk>true</jk>);
+ </p>
+ <p>
+ Now when we rerun the sample code, we'll see the added <code>root</code> attribute on the root resource.
+ </p>
+ <p class='bcode'>
+ <xt><rdf:RDF</xt>
+ <xa>xmlns:rdf</xa>=<xs>"http://www.w3.org/1999/02/22-rdf-syntax-ns#"</xs>
+ <xa>xmlns:j</xa>=<xs>"http://www.ibm.com/juno/"</xs>
+ <xa>xmlns:jp</xa>=<xs>"http://www.ibm.com/junobp/"</xs>
+ <xa>xmlns:per</xa>=<xs>"http://www.ibm.com/person/"</xs>
+ <xa>xmlns:mail</xa>=<xs>"http://www.ibm.com/mail/"</xs>
+ <xa>xmlns:addr</xa>=<xs>"http://www.ibm.com/address/"</xs><xt>></xt>
+ <xt><rdf:Description <xa>rdf:about</xa>=<xs>"http://sample/addressBook/person/1"</xs>></xt>
+ <b><xt><j:root></xt>true<xt></j:root></xt></b>
+ <xt><per:addressBookUri</xt> <xa>rdf:resource</xa>=<xs>"http://sample/addressBook"</xs><xt>/></xt>
+ <xt><per:id></xt>1<xt></per:id></xt>
+ <xt><per:name></xt>John Smith<xt></per:name></xt>
+ <xt><per:addresses></xt>
+ <xt><rdf:Seq></xt>
+ <xt><rdf:li></xt>
+ <xt><rdf:Description <xa>rdf:about</xa>=<xs>"http://sample/addressBook/address/1"</xs>></xt>
+ <xt><addr:personUri <xa>rdf:resource</xa>=<xs>"http://sample/addressBook/person/1"</xs>/></xt>
+ <xt><addr:id></xt>1<xt></addr:id></xt>
+ <xt><mail:street></xt>100 Main Street<xt></mail:street></xt>
+ <xt><mail:city></xt>Anywhereville<xt></mail:city></xt>
+ <xt><mail:state></xt>NY<xt></mail:state></xt>
+ <xt><mail:zip></xt>12345<xt></mail:zip></xt>
+ <xt><addr:isCurrent></xt>true<xt></addr:isCurrent></xt>
+ <xt></rdf:Description></xt>
+ <xt></rdf:li></xt>
+ <xt></rdf:Seq></xt>
+ <xt></per:addresses></xt>
+ <xt></rdf:Description></xt>
+ <xt></rdf:RDF></xt>
+ </p>
+ </div>
+
+
+ <!-- ======================================================================================================== -->
+ <a id="TypedLiterals"></a>
+ <h3 class='topic' onclick='toggle(this)'>2.6 - Typed literals</h3>
+ <div class='topic'>
+ <p>
+ XML-Schema datatypes can be added to non-<code>String</code> literals through the {@link com.ibm.juno.core.jena.RdfSerializerProperties#RDF_addLiteralTypes}
+ setting.
+ </p>
+ <p>
+ To enable, set the <jsf>RDF_addLiteralTypes</jsf> property to <jk>true</jk> on the serializer:
+ </p>
+ <p class='bcode'>
+ <jc>// Create a new serializer (revert back to namespace autodetection).</jc>
+ RdfSerializer s = <jk>new</jk> RdfSerializer.XmlAbbrev()
+ .setProperty(RdfProperties.<jsf>RDF_rdfxml_tab</jsf>, 3),
+ .setProperty(RdfSerializerProperties.<jsf>RDF_addLiteralTypes</jsf>, <jk>true</jk>);
+ </p>
+ <p>
+ Now when we rerun the sample code, we'll see the added <code>root</code> attribute on the root resource.
+ </p>
+ <p class='bcode'>
+ <xt><rdf:RDF</xt>
+ <xa>xmlns:rdf</xa>=<xs>"http://www.w3.org/1999/02/22-rdf-syntax-ns#"</xs>
+ <xa>xmlns:j</xa>=<xs>"http://www.ibm.com/juno/"</xs>
+ <xa>xmlns:jp</xa>=<xs>"http://www.ibm.com/junobp/"</xs>
+ <xa>xmlns:per</xa>=<xs>"http://www.ibm.com/person/"</xs>
+ <xa>xmlns:mail</xa>=<xs>"http://www.ibm.com/mail/"</xs>
+ <xa>xmlns:addr</xa>=<xs>"http://www.ibm.com/address/"</xs><xt>></xt>
+ <xt><rdf:Description <xa>rdf:about</xa>=<xs>"http://sample/addressBook/person/1"</xs>></xt>
+ <xt><per:addressBookUri</xt> <xa>rdf:resource</xa>=<xs>"http://sample/addressBook"</xs><xt>/></xt>
+ <xt><per:id</xt> <b><xa>rdf:datatype</xa>=<xs>"http://www.w3.org/2001/XMLSchema#int"</xs></b><xt>></xt>1<xt></per:id></xt>
+ <xt><per:name></xt>John Smith<xt></per:name></xt>
+ <xt><per:addresses></xt>
+ <xt><rdf:Seq></xt>
+ <xt><rdf:li></xt>
+ <xt><rdf:Description <xa>rdf:about</xa>=<xs>"http://sample/addressBook/address/1"</xs>></xt>
+ <xt><addr:personUri <xa>rdf:resource</xa>=<xs>"http://sample/addressBook/person/1"</xs>/></xt>
+ <xt><addr:id</xt> <b><xa>rdf:datatype</xa>=<xs>"http://www.w3.org/2001/XMLSchema#int"</xs></b>></xt>1<xt></addr:id></xt>
+ <xt><mail:street></xt>100 Main Street<xt></mail:street></xt>
+ <xt><mail:city></xt>Anywhereville<xt></mail:city></xt>
+ <xt><mail:state></xt>NY<xt></mail:state></xt>
+ <xt><mail:zip</xt> <b><xa>rdf:datatype</xa>=<xs>"http://www.w3.org/2001/XMLSchema#int"</xs></b>></xt>12345<xt></mail:zip></xt>
+ <xt><addr:isCurrent</xt> <b><xa>rdf:datatype</xa>=<xs>"http://www.w3.org/2001/XMLSchema#boolean"</xs></b>></xt>true<xt></addr:isCurrent></xt>
+ <xt></rdf:Description></xt>
+ <xt></rdf:li></xt>
+ <xt></rdf:Seq></xt>
+ <xt></per:addresses></xt>
+ <xt></rdf:Description></xt>
+ <xt></rdf:RDF></xt>
+ </p>
+ </div>
+
+
+ <!-- ======================================================================================================== -->
+ <a id="Recursion"></a>
+ <h3 class='topic' onclick='toggle(this)'>2.7 - Non-tree models and recursion detection</h3>
+ <div class='topic'>
+ <p>
+ The RDF serializer is designed to be used against tree structures.<br>
+ It expects that there not be loops in the POJO model (e.g. children with references to parents, etc...).<br>
+ If you try to serialize models with loops, you will usually cause a <code>StackOverflowError</code> to
+ be thrown (if {@link com.ibm.juno.core.serializer.SerializerProperties#SERIALIZER_maxDepth} is not reached first).
+ </p>
+ <p>
+ If you still want to use the XML serializer on such models, Juno provides the
+ {@link com.ibm.juno.core.serializer.SerializerProperties#SERIALIZER_detectRecursions} setting.<br>
+ It tells the serializer to look for instances of an object in the current branch of the tree and
+ skip serialization when a duplicate is encountered.
+ </p>
+ <p>
+ Recursion detection introduces a performance penalty of around 20%.<br>
+ For this reason the setting is disabled by default.
+ </p>
+ </div>
+
+
+ <!-- ======================================================================================================== -->
+ <a id="SerializerConfigurableProperties"></a>
+ <h3 class='topic' onclick='toggle(this)'>2.8 - Configurable properties</h3>
+ <div class='topic'>
+ <p>
+ The full list of configurable settings applicable to the <code>RdfSerializer</code> class is shown below:
+ </p>
+ <table class='styled' style='border-collapse: collapse;'>
+ <tr><th>Property</th><th>Short Description</th></tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfSerializerProperties#RDF_addLiteralTypes}</td>
+ <td>Add XSI data types to non-<code>String</code> literals</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfSerializerProperties#RDF_addRootProperty}</td>
+ <td>Add RDF root identifier property to root node</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_junoNs}</td>
+ <td>The XML namespace for Juno properties</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_junoBpNs}</td>
+ <td>The default XML namespace for bean properties</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_arp_iriRules}</td>
+ <td>Set the engine for checking and resolving</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_arp_errorMode}</td>
+ <td>Allows a coarse-grained approach to control of error handling</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_arp_embedding}</td>
+ <td>Sets ARP to look for RDF embedded within an enclosing XML document</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_arp_err_}</td>
+ <td>Provides fine-grained control over detected error conditions</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_arp_warn_}</td>
+ <td>Provides fine-grained control over detected warning conditions</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_arp_ign_}</td>
+ <td>Provides fine-grained control over ignoring conditions</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_rdfxml_xmlBase}</td>
+ <td>The value to be included for an <xa>xml:base</xa> attribute on the root element in the file</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_rdfxml_longId}</td>
+ <td>Whether to use long IDs for anon resources</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_rdfxml_allowBadUris}</td>
+ <td>URIs in the graph are, by default, checked prior to serialization</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_rdfxml_relativeUris}</td>
+ <td>What sort of relative URIs should be used</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_rdfxml_showXmlDeclaration}</td>
+ <td>Options for XML declaration in output</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_rdfxml_showDoctypeDeclaration}</td>
+ <td>Show XML declaration in output</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_rdfxml_tab}</td>
+ <td>The number of spaces with which to indent XML child elements</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_rdfxml_attributeQuoteChar}</td>
+ <td>The XML attribute quote character</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_rdfxml_blockRules}</td>
+ <td>Indicates grammar rules that will not be used</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_n3_minGap}</td>
+ <td>Minimum gap between items on a line</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_n3_objectLists}</td>
+ <td>Print object lists as comma separated lists</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_n3_subjectColumn}</td>
+ <td>If the subject is shorter than this value, the first property may go on the same line</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_n3_propertyColumn}</td>
+ <td>Width of the property column</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_n3_indentProperty}</td>
+ <td>Width to indent properties</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_n3_widePropertyLen}</td>
+ <td>Width of the property column</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_n3_abbrevBaseUri}</td>
+ <td>Control whether to use abbreviations <code><></code> or <code><#></code></td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_n3_usePropertySymbols}</td>
+ <td>Control whether to use <code>a</code>, <code>=</code> and <code>=></code> in output</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_n3_useTripleQuotedStrings}</td>
+ <td>Allow the use of <code>"""</code> to delimit long strings</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_n3_useDoubles}</td>
+ <td>Allow the use doubles as <code>123.456</code></td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.xml.XmlSerializerProperties#XML_autoDetectNamespaces}</td>
+ <td>Auto-detect namespace usage</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.xml.XmlSerializerProperties#XML_namespaces}</td>
+ <td>Namespaces used</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.serializer.SerializerProperties#SERIALIZER_maxDepth}</td>
+ <td>Maximum serialization depth</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.serializer.SerializerProperties#SERIALIZER_detectRecursions}</td>
+ <td>Automatically detect POJO recursions</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.serializer.SerializerProperties#SERIALIZER_useIndentation}</td>
+ <td>Use indentation in output</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.serializer.SerializerProperties#SERIALIZER_quoteChar}</td>
+ <td>Quote character</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.serializer.SerializerProperties#SERIALIZER_trimNullProperties}</td>
+ <td>Trim null bean property values from output</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.serializer.SerializerProperties#SERIALIZER_trimEmptyLists}</td>
+ <td>Trim empty lists and arrays from output</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.serializer.SerializerProperties#SERIALIZER_trimEmptyMaps}</td>
+ <td>Trim empty maps from output</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.serializer.SerializerProperties#SERIALIZER_relativeUriBase}</td>
+ <td>URI context root for relative URIs</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.serializer.SerializerProperties#SERIALIZER_absolutePathUriBase}</td>
+ <td>URI authority for absolute path relative URIs</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.BeanContextProperties#BEAN_beansRequireDefaultConstructor}</td>
+ <td>Beans require no-arg constructors</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.BeanContextProperties#BEAN_beansRequireSerializable}</td>
+ <td>Beans require <code>Serializable</code> interface</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.BeanContextProperties#BEAN_beansRequireSettersForGetters}</td>
+ <td>Beans require setters for getters</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.BeanContextProperties#BEAN_beansRequireSomeProperties}</td>
+ <td>Beans require some properties</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.BeanContextProperties#BEAN_beanConstructorVisibility}</td>
+ <td>Look for bean constructors with the specified minimum visibility</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.BeanContextProperties#BEAN_beanClassVisibility}</td>
+ <td>Look for bean classes with the specified minimum visibility</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.BeanContextProperties#BEAN_beanFieldVisibility}</td>
+ <td>Look for bean fields with the specified minimum visibility</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.BeanContextProperties#BEAN_methodVisibility}</td>
+ <td>Look for bean methods with the specified minimum visibility</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.BeanContextProperties#BEAN_useJavaBeanIntrospector}</td>
+ <td>Use Java {@link java.beans.Introspector} for determining bean properties</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.BeanContextProperties#BEAN_useInterfaceProxies}</td>
+ <td>Use interface proxies</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.BeanContextProperties#BEAN_ignoreUnknownBeanProperties}</td>
+ <td>Ignore unknown properties</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.BeanContextProperties#BEAN_ignoreUnknownNullBeanProperties}</td>
+ <td>Ignore unknown properties with null values</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.BeanContextProperties#BEAN_ignoreInvocationExceptionsOnGetters}</td>
+ <td>Ignore invocation errors when calling getters</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.BeanContextProperties#BEAN_ignoreInvocationExceptionsOnSetters}</td>
+ <td>Ignore invocation errors when calling setters</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.BeanContextProperties#BEAN_addNotBeanPackages}</td>
+ <td>Add to the list of packages whose classes should not be considered beans</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.BeanContextProperties#BEAN_removeNotBeanPackages}</td>
+ <td>Remove from the list of packages whose classes should not be considered beans</td>
+ </tr>
+ </table>
+ </div>
+
+
+ <!-- ======================================================================================================== -->
+ <a id="SerializerOtherNotes"></a>
+ <h3 class='topic' onclick='toggle(this)'>2.9 - Other notes</h3>
+ <div class='topic'>
+ <ul>
+ <li>Like all other Juno serializers, the RDF serializer is thread safe and maintains an internal cache of bean classes encountered.
+ For performance reasons, it's recommended that serializers be reused whenever possible instead of always creating new instances.
+ </ul>
+ </div>
+</div>
+
+
+<!-- ======================================================================================================== -->
+<a id="RdfParser"></a>
+<h2 class='topic' onclick='toggle(this)'>3 - RdfParser class</h2>
+<div class='topic'>
+ <p>
+ The {@link com.ibm.juno.core.jena.RdfParser} class is the top-level class for all Jena-based parsers.<br>
+ Language-specific parsers are defined as inner subclasses of the <code>RdfParser</code> class:
+ </p>
+ <ul>
+ <li>{@link com.ibm.juno.core.jena.RdfParser.Xml}
+ <li>{@link com.ibm.juno.core.jena.RdfParser.NTriple}
+ <li>{@link com.ibm.juno.core.jena.RdfParser.Turtle}
+ <li>{@link com.ibm.juno.core.jena.RdfParser.N3}
+ </ul>
+ <p>
+ The <code>RdfParser.Xml</code> parser handles both regular and abbreviated RDF/XML.
+ </p>
+ <p>
+ Static reusable instances of parsers are also provided with default settings:
+ </p>
+ <ul>
+ <li>{@link com.ibm.juno.core.jena.RdfParser#DEFAULT_XML}
+ <li>{@link com.ibm.juno.core.jena.RdfParser#DEFAULT_TURTLE}
+ <li>{@link com.ibm.juno.core.jena.RdfParser#DEFAULT_NTRIPLE}
+ <li>{@link com.ibm.juno.core.jena.RdfParser#DEFAULT_N3}
+ </ul>
+ <p>
+ For an example, we will build upon the previous example and parse the generated RDF/XML back into the original bean.
+ </p>
+ <p class='bcode'>
+ <jc>// Create a new serializer with readable output.</jc>
+ RdfSerializer s = <jk>new</jk> RdfSerializer.XmlAbbrev()
+ .setProperty(RdfProperties.<jsf>RDF_rdfxml_tab</jsf>, 3)
+ .setProperty(RdfSerializerProperties.<jsf>RDF_addRootProperty</jsf>, <jk>true</jk>);
+
+ <jc>// Create our bean.</jc>
+ Person p = <jk>new</jk> Person(1, <js>"John Smith"</js>, <js>"http://sample/addressBook/person/1"</js>, <js>"http://sample/addressBook"</js>, <js>"Aug 12, 1946"</js>);
+ Address a = <jk>new</jk> Address();
+ a.<jf>uri</jf> = <jk>new</jk> URI(<js>"http://sample/addressBook/address/1"</js>);
+ a.<jf>personUri</jf> = <jk>new</jk> URI(<js>"http://sample/addressBook/person/1"</js>);
+ a.<jf>id</jf> = 1;
+ a.<jf>street</jf> = <js>"100 Main Street"</js>;
+ a.<jf>city</jf> = <js>"Anywhereville"</js>;
+ a.<jf>state</jf> = <js>"NY"</js>;
+ a.<jf>zip</jf> = 12345;
+ a.<jf>isCurrent</jf> = <jk>true</jk>;
+ p.<jf>addresses</jf>.add(a);
+
+ <jc>// Serialize the bean to RDF/XML.</jc>
+ String rdfXml = s.serialize(p);
+
+ <jc>// Parse it back into a bean using the reusable XML parser.</jc>
+ p = RdfParser.<jsf>DEFAULT_XML</jsf>.parse(rdfXml, Person.<jk>class</jk>);
+
+ <jc>// Render it as JSON.</jc>
+ String json = JsonSerializer.<jsf>DEFAULT_LAX_READABLE</jsf>.serialize(p);
+ System.<jsm>err</jsm>.println(json);
+ </p>
+ <p>
+ We print it out to JSON to show that all the data has been preserved:
+ </p>
+ <p class='bcode'>
+ {
+ uri: <js>'http://sample/addressBook/person/1'</js>,
+ addressBookUri: <js>'http://sample/addressBook'</js>,
+ id: 1,
+ name: <js>'John Smith'</js>,
+ birthDate: <js>'1946-08-12T00:00:00Z'</js>,
+ addresses: [
+ {
+ uri: <js>'http://sample/addressBook/address/1'</js>,
+ personUri: <js>'http://sample/addressBook/person/1'</js>,
+ id: 1,
+ street: <js>'100 Main Street'</js>,
+ city: <js>'Anywhereville'</js>,
+ state: <js>'NY'</js>,
+ zip: 12345,
+ isCurrent: <jk>true</jk>
+ }
+ ]
+ }
+ </p>
+
+
+ <!-- ======================================================================================================== -->
+ <a id="GenericParsing"></a>
+ <h3 class='topic' onclick='toggle(this)'>3.1 - Parsing into generic POJO models</h3>
+ <div class='topic'>
+ <p>
+ The RDF parser is not limited to parsing back into the original bean classes.<br>
+ If the bean classes are not available on the parsing side, the parser can also be used to
+ parse into a generic model consisting of <code>Maps</code>, <code>Collections</code>, and primitive
+ objects.
+ </p>
+ <p>
+ You can parse into any <code>Map</code> type (e.g. <code>HashMap</code>, <code>TreeMap</code>), but
+ using {@link com.ibm.juno.core.ObjectMap} is recommended since it has many convenience methods
+ for converting values to various types. <br>
+ The same is true when parsing collections. You can use any Collection (e.g. <code>HashSet</code>, <code>LinkedList</code>)
+ or array (e.g. <code>Object[]</code>, <code>String[]</code>, <code>String[][]</code>), but using
+ {@link com.ibm.juno.core.ObjectList} is recommended.
+ </p>
+ <p>
+ When the map or list type is not specified, or is the abstract <code>Map</code>, <code>Collection</code>, or <code>List</code> types,
+ the parser will use <code>ObjectMap</code> and <code>ObjectList</code> by default.
+ </p>
+ <p>
+ In the following example, we parse into an <code>ObjectMap</code> and use the convenience methods for performing data conversion on values in the map.
+ </p>
+ <p class='bcode'>
+ <jc>// Parse RDF into a generic POJO model.</jc>
+ ObjectMap m = RdfParser.<jsf>DEFAULT_XML</jsf>.parse(rdfXml, ObjectMap.<jk>class</jk>);
+
+ <jc>// Get some simple values.</jc>
+ String name = m.getString(<js>"name"</js>);
+ <jk>int</jk> id = m.getInt(<js>"id"</js>);
+
+ <jc>// Get a value convertable from a String.</jc>
+ URI uri = m.get(URI.<jk>class</jk>, <js>"uri"</js>);
+
+ <jc>// Get a value using a filter.</jc>
+ CalendarFilter filter = <jk>new</jk> CalendarFilter.ISO8601DTZ();
+ Calendar birthDate = m.get(filter, <js>"birthDate"</js>);
+
+ <jc>// Get the addresses.</jc>
+ ObjectList addresses = m.getObjectList(<js>"addresses"</js>);
+
+ <jc>// Get the first address and convert it to a bean.</jc>
+ Address address = addresses.get(Address.<jk>class</jk>, 0);
+ </p>
+
+ <p>
+ However, there are caveats when parsing into generic models due to the nature of RDF.<br>
+ Watch out for the following:
+ </p>
+ <ul>
+ <li>The ordering of entries are going to be inconsistent.<br><br>
+ <li>Bean URIs are always going to be denoted with the key <js>"uri"</js>.<br>
+ Therefore, you cannot have a bean with a URI property and a separate property named <js>"uri"</js>.<br>
+ The latter will overwrite the former.<br>
+ This isn't a problem when parsing into beans instead of generic POJO models.<br><br>
+ <li>All values are strings.<br>
+ This normally isn't a problem when using <code>ObjectMap</code> and <code>ObjectList</code> since
+ various methods are provided for converting to the correct type anyway.<br><br>
+ <li>The results may not be what is expected if there are lots of URL reference loops in the RDF model.<br>
+ As nodes are processed from the root node down through the child nodes, the parser keeps
+ track of previously processed parent URIs and handles them accordingly.<br>
+ If it finds that the URI has previously been processed, it handles it as a normal URI string and doesn't
+ process further.<br>
+ However, depending on how complex the reference loops are, the parsed data may end up having the
+ same data in it, but structured differently from the original POJO.
+ </ul>
+ <p>
+ We can see some of these when we render the <code>ObjectMap</code> back to JSON.
+ </p>
+ <p class='bcode'>
+ System.<jsm>err</jsm>.println(JsonSerializer.<jsf>DEFAULT_LAX_READABLE</jsf>.serialize(m));
+ </p>
+ <p>
+ This is what's produced:
+ </p>
+ <p class='bcode'>
+ {
+ uri: <js>'http://sample/addressBook/person/1'</js>,
+ addresses: [
+ {
+ uri: <js>'http://sample/addressBook/address/1'</js>,
+ isCurrent: <js>'true'</js>,
+ zip: <js>'12345'</js>,
+ state: <js>'NY'</js>,
+ city: <js>'Anywhereville'</js>,
+ street: <js>'100 Main Street'</js>,
+ id: <js>'1'</js>,
+ personUri: <js>'http://sample/addressBook/person/1'</js>
+ }
+ ],
+ birthDate: <js>'1946-08-12T00:00:00Z'</js>,
+ addressBookUri: <js>'http://sample/addressBook'</js>,
+ name: <js>'John Smith'</js>,
+ id: <js>'1'</js>,
+ root: <js>'true'</js>
+ }
+ </p>
+ <p>
+ As a general rule, parsing into beans is often more efficient than parsing into generic models.<br>
+ And working with beans is often less error prone than working with generic models.
+ </p>
+ </div>
+
+ <!-- ======================================================================================================== -->
+ <a id="ParserConfigurableProperties"></a>
+ <h3 class='topic' onclick='toggle(this)'>3.2 - Configurable properties</h3>
+ <div class='topic'>
+ <p>
+ The full list of configurable settings applicable to the <code>RdfParser</code> class is shown below:
+ </p>
+ <table class='styled' style='border-collapse: collapse;'>
+ <tr><th>Property</th><th>Short Description</th></tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfParserProperties#RDF_trimWhitespace}</td>
+ <td>Trim whitespace from text elements</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_arp_iriRules}</td>
+ <td>Set the engine for checking and resolving</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_arp_errorMode}</td>
+ <td>Allows a coarse-grained approach to control of error handling</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_arp_embedding}</td>
+ <td>Sets ARP to look for RDF embedded within an enclosing XML document</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_arp_err_}</td>
+ <td>Provides fine-grained control over detected error conditions</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_arp_warn_}</td>
+ <td>Provides fine-grained control over detected warning conditions</td>
+ </tr>
+ <tr>
+ <td>{@link com.ibm.juno.core.jena.RdfProperties#RDF_arp_ign_}</td>
+ <td>Provides fine-grained control over ignoring conditions</td>
+ </tr>
+ </table>
+ </div>
+
+
+ <!-- ======================================================================================================== -->
+ <a id="ParserOtherNotes"></a>
+ <h3 class='topic' onclick='toggle(this)'>3.3 - Other notes</h3>
+ <div class='topic'>
+ <ul>
+ <li>Like all other Juno parsers, the RDF parser is thread safe and maintains an internal cache of bean classes encountered.
+ For performance reasons, it's recommended that parser be reused whenever possible instead of always creating new instances.
+ </ul>
+ </div>
+
+</div>
+
+
+<!-- ======================================================================================================== -->
+<a id="RestApiSupport"></a>
+<h2 class='topic' onclick='toggle(this)'>4 - REST API support</h2>
+<div class='topic'>
+ <p>
+ Juno provides fully-integrated support for RDF serialization/parsing in the REST server and client APIs.
+ </p>
+ <p>
+ The next two sections describe these in detail.
+ </p>
+
+ <!-- ======================================================================================================== -->
+ <a id="RestServerSupport"></a>
+ <h3 class='topic' onclick='toggle(this)'>4.1 - REST server support</h3>
+ <div class='topic'>
+ <p>
+ There are four general ways of defining REST interfaces with support for RDF media types.<br>
+ Two using the built-in Juno Server API, and two using the JAX-RS integration component.
+ </p>
+ <ul>
+ <li>Create a servlet that subclasses from {@link com.ibm.juno.server.jena.RestServletJenaDefault}.<br>
+ This includes serialization and parsing for all Jena supported types, including all supported flavors of RDF.<br><br>
+ <li>Create a servlet that subclasses from {@link com.ibm.juno.server.RestServlet} and specify the
+ RDF serializers and parsers using the {@link com.ibm.juno.server.annotation.RestResource#serializers()} and
+ {@link com.ibm.juno.server.annotation.RestResource#parsers()} on the entire servlet class, or
+ the {@link com.ibm.juno.server.annotation.RestMethod#serializers()} and {@link com.ibm.juno.server.annotation.RestMethod#parsers()}
+ annotations on individual methods within the class.<br><br>
+ <li>Register {@link com.ibm.juno.server.jaxrs.rdf.DefaultJenaProvider} with JAX-RS to provide support RDF support for all JAX-RS resource.<br>
+ This includes serialization and parsing for all Juno supported types (JSON, XML, HTML...), including all supported flavors of RDF.<br><br>
+ <li>Create and register a subclass of {@link com.ibm.juno.server.jaxrs.BaseProvider} and specify the serializers and parsers to use on JAX-RS resources.
+ </ul>
+ <p>
+ In general, the Juno REST server API is much more configurable and easier to use than JAX-RS, but beware that the author may be slightly biased in this statement.
+ </p>
+
+ <!-- ======================================================================================================== -->
+ <a id="RestServletJenaDefault"></a>
+ <h4 class='topic' onclick='toggle(this)'>4.1.1 - Using RestServletJenaDefault</h4>
+ <div class='topic'>
+ <p>
+ The quickest way to implement a REST resource with RDF support is to create a subclass of {@link com.ibm.juno.server.jena.RestServletJenaDefault}.<br>
+ This class provides support for all the RDF flavors in addition to JSON, XML, HTML, and URL-Encoding.
+ </p>
+ <p>
+ The reason why RDF support was not added to {@link com.ibm.juno.server.RestServletDefault} directly was to keep the Jena prerequisites
+ out of the <code>com.ibm.juno.server</code> package.
+ </p>
+ <p>
+ The <code>AddressBookResource</code> example shown in the first chapter uses the <code>RestServletJenaDefault</code> class.<br>
+ The start of the class definition is shown below:
+ </p>
+ <p class='bcode'>
+ <jc>// Proof-of-concept resource that shows off the capabilities of working with POJO resources.
+ // Consists of an in-memory address book repository.</jc>
+ <ja>@RestResource</ja>(
+ messages=<js>"nls/AddressBookResource"</js>,
+ properties={
+ <ja>@Property</ja>(name=RdfProperties.<jsf>RDF_rdfxml_tab</jsf>, value=<js>"3"</js>),
+ <ja>@Property</ja>(name=RdfSerializerProperties.<jsf>RDF_addRootProperty</jsf>, value=<js>"true"</js>),
+ <ja>@Property</ja>(name=SerializerProperties.<jsf>SERIALIZER_quoteChar</jsf>, value=<js>"'"</js>),
+ <ja>@Property</ja>(name=HtmlSerializerProperties.<jsf>HTML_uriAnchorText</jsf>, value=<jsf>TO_STRING</jsf>),
+ <ja>@Property</ja>(name=HtmlDocSerializerProperties.<jsf>HTMLDOC_title</jsf>, value=<js>"$L{title}"</js>),
+ <ja>@Property</ja>(name=HtmlDocSerializerProperties.<jsf>HTMLDOC_description</jsf>, value=<js>"$L{description}"</js>),
+ <ja>@Property</ja>(name=HtmlDocSerializerProperties.<jsf>HTMLDOC_links</jsf>, value=<js>"{options:'?method=OPTIONS',doc:'doc'}"</js>)
+ },
+ encoders=GzipEncoder.<jk>class</jk>
+ )
+ <jk>public class</jk> AddressBookResource <jk>extends</jk> RestServletJenaDefault {
+ </p>
+ <p>
+ Notice how serializer and parser properties can be specified using the <code>@RestResource.properties()</code> annotation.<br>
+ The <jsf>RDF_rdfxml_tab</jsf> and <jsf>RDF_addRootProperty</jsf> are properties on the RDF serializers.<br>
+ The <jsf>SERIALIZER_quoteChar</jsf> property is common to all serializers.<br>
+ The remaining properties are specific to the HTML serializer.
+ </p>
+ <p>
+ The <code>$L{...}</code> variable represent localized strings pulled from the resource bundle identified by the <code>messages</code> annotation.
+ These variables are replaced at runtime based on the HTTP request locale.
+ Several built-in runtime variable types are defined, and the API can be extended to include user-defined variables.
+ See {@link com.ibm.juno.server.RestServlet#getVarResolver()} for more information.
+ </p>
+ <p>
+ This document won't go into all the details of the Juno <code>RestServlet</code> class.<br>
+ Refer to the {@link com.ibm.juno.server} documentation for more information on the REST servlet class in general.
+ </p>
+ <p>
+ The rest of the code in the resource class consists of REST methods that simply accept and return POJOs.<br>
+ The framework takes care of all content negotiation, serialization/parsing, and error handling.<br>
+ Below are 3 of those methods to give you a general idea of the concept:
+ </p>
+ <p class='bcode'>
+ <jc>// GET person request handler</jc>
+ <ja>@RestMethod</ja>(name=<js>"GET"</js>, path=<js>"/people/{id}/*"</js>, rc={200,404})
+ <jk>public</jk> Person getPerson(RestRequest req, <ja>@Attr</ja> <jk>int</jk> id) throws Exception {
+ properties.put(HtmlDocSerializerProperties.<jsf>HTMLDOC_title</jsf>, req.getPathInfo());
+ <jk>return</jk> findPerson(id);
+ }
+
+ <jc>// POST person handler</jc>
+ <ja>@RestMethod</ja>(name=<js>"POST"</js>, path=<js>"/people"</js>, guards=AdminGuard.<jk>class</jk>, rc={307,404})
+ <jk>public void</jk> createPerson(RestResponse res, <ja>@Content</ja> CreatePerson cp) <jk>throws</jk> Exception {
+ Person p = addressBook.createPerson(cp);
+ res.sendRedirect(p.<jf>uri</jf>);
+ }
+
+ <jc>// DELETE person handler</jc>
+ <ja>@RestMethod</ja>(name=<js>"DELETE"</js>, path=<js>"/people/{id}"</js>, guards=AdminGuard.<jk>class</jk>, rc={200,404})
+ <jk>public</jk> String deletePerson(RestResponse res, <ja>@Attr</ja> <jk>int</jk> id) <jk>throws</jk> Exception {
+ Person p = findPerson(id);
+ addressBook.remove(p);
+ <jk>return</jk> <js>"DELETE successful"</js>;
+ }
+ </p>
+ <p>
+ The resource class can be registered with the web application like any other servlet, or can be
+ defined as a child of another resource through the {@link com.ibm.juno.server.annotation.RestResource#children()} annotation.
+ </div>
+
+ <!-- ======================================================================================================== -->
+ <a id="RestServlet"></a>
+ <h4 class='topic' onclick='toggle(this)'>4.1.2 - Using RestServlet with annotations</h4>
+ <div class='topic'>
+ <p>
+ For fine-tuned control of media types, the {@link com.ibm.juno.server.RestServlet} class
+ can be subclassed directly.<br>
+ The serializers/parsers can be specified through annotations at the class and/or method levels.
+ </p>
+ <p>
+ An equivalent <code>AddressBookResource</code> class could be defined to only support RDF/XML using
+ the following definition:
+ </p>
+ <p class='bcode'>
+ <ja>@RestResource</ja>(
+ serializers={RdfSerializer.XmlAbbrev.<jk>class</jk>},
+ parsers={RdfParser.Xml.<jk>class</jk>},
+ properties={
+ <ja>@Property</ja>(name=RdfProperties.<jsf>RDF_rdfxml_tab</jsf>, value=<js>"3"</js>),
+ <ja>@Property</ja>(name=RdfSerializerProperties.<jsf>RDF_addRootProperty</jsf>, value=<js>"true"</js>),
+ <ja>@Property</ja>(name=SerializerProperties.<jsf>SERIALIZER_quoteChar</jsf>, value=<js>"'"</js>)
+ }
+ )
+ <jk>public class</jk> AddressBookResource <jk>extends</jk> RestServlet {
+ </p>
+ <p>
+ Likewise, serializers and parsers can be specified/augmented/overridden at the method level like so:
+ </p>
+ <p class='bcode'>
+ <jc>// GET person request handler</jc>
+ <ja>@RestMethod</ja>(name=<js>"GET"</js>, path=<js>"/people/{id}/*"</js>, rc={200,404},
+ serializers={RdfSerializer.XmlAbbrev.<jk>class</jk>},
+ parsers={RdfParser.Xml.<jk>class</jk>},
+ properties={
+ <ja>@Property</ja>(name=RdfProperties.<jsf>RDF_rdfxml_tab</jsf>, value=<js>"3"</js>),
+ <ja>@Property</ja>(name=SerializerProperties.<jsf>SERIALIZER_quoteChar</jsf>, value=<js>"'"</js>)
+ }
+ )
+ <jk>public</jk> Person getPerson(RestRequest req, <ja>@Attr</ja> <jk>int</jk> id) throws Exception {
+ properties.put(HtmlDocSerializerProperties.<jsf>HTMLDOC_title</jsf>, req.getPathInfo());
+ <jk>return</jk> findPerson(id);
+ }
+ </p>
+ <p>
+ The {@link com.ibm.juno.server.annotation.RestMethod#serializersInherit()} and
+ {@link com.ibm.juno.server.annotation.RestMethod#parsersInherit()} control how various artifacts
+ are inherited from the parent class.<br>
+ Refer to {@link com.ibm.juno.server} for additional information on using these annotations.
+ </p>
+ </div>
+
+ <!-- ======================================================================================================== -->
+ <a id="DefaultJenaProvider"></a>
+ <h4 class='topic' onclick='toggle(this)'>4.1.3 - Using JAX-RS DefaultJenaProvider</h4>
+ <div class='topic'>
+ <p>
+ RDF media type support in JAX-RS can be achieved by using the {@link com.ibm.juno.server.jaxrs.rdf.DefaultJenaProvider} class.<br>
+ It implements the JAX-RS <code>MessageBodyReader</code> and <code>MessageBodyWriter</code> interfaces for all Juno supported media types.
+ </p>
+ <p>
+ The <code>DefaultJenaProvider</code> class definition is shown below:
+ </p>
+ <p class='bcode'>
+ <ja>@Provider</ja>
+ <ja>@Produces</ja>({
+ <js>"application/json"</js>, <js>"text/json"</js>, <jc>// JsonSerializer</jc>
+ <js>"application/json+simple"</js>,<js>"text/json+simple"</js>, <jc>// JsonSerializer.Simple</jc>
+ <js>"application/json+schema"</js>,<js>"text/json+schema"</js>, <jc>// JsonSchemaSerializer</jc>
+ <js>"text/xml"</js>, <jc>// XmlDocSerializer</jc>
+ <js>"text/xml+simple"</js>, <jc>// XmlDocSerializer.Simple</jc>
+ <js>"text/xml+schema"</js>, <jc>// XmlSchemaDocSerializer</jc>
+ <js>"text/html"</js>, <jc>// HtmlDocSerializer</jc>
+ <js>"application/x-www-form-urlencoded"</js>, <jc>// UrlEncodingSerializer</jc>
+ <js>"text/xml+soap"</js>, <jc>// SoapXmlSerializer</jc>
+ <js>"text/xml+rdf"</js>, <jc>// RdfSerializer.Xml</jc>
+ <js>"text/xml+rdf+abbrev"</js>, <jc>// RdfSerializer.XmlAbbrev</jc>
+ <js>"text/n-triple"</js>, <jc>// RdfSerializer.NTriple</jc>
+ <js>"text/turtle"</js>, <jc>// RdfSerializer.Turtle</jc>
+ <js>"text/n3"</js>, <jc>// RdfSerializer.N3</jc>
+ <js>"application/x-java-serialized-object"</js> <jc>// JavaSerializedObjectSerializer</jc>
+ })
+ <ja>@Consumes</ja>({
+ <js>"application/json"</js>, <js>"text/json"</js>, <jc>// JsonParser</jc>
+ <js>"text/xml"</js>, <jc>// XmlParser</jc>
+ <js>"text/html"</js>, <jc>// HtmlParser</jc>
+ <js>"application/x-www-form-urlencoded"</js>, <jc>// UrlEncodingParser</jc>
+ <js>"text/xml+rdf"</js>, <jc>// RdfParser.Xml</jc>
+ <js>"text/n-triple"</js>, <jc>// RdfParser.NTriple</jc>
+ <js>"text/turtle"</js>, <jc>// RdfParser.Turtle</jc>
+ <js>"text/n3"</js>, <jc>// RdfParser.N3</jc>
+ <js>"application/x-java-serialized-object"</js> <jc>// JavaSerializedObjectParser</jc>
+ })
+ <ja>@JunoProvider</ja>(
+ serializers={
+ JsonSerializer.<jk>class</jk>,
+ JsonSerializer.Simple.<jk>class</jk>,
+ JsonSchemaSerializer.<jk>class</jk>,
+ XmlDocSerializer.<jk>class</jk>,
+ XmlDocSerializer.Simple.<jk>class</jk>,
+ XmlSchemaDocSerializer.<jk>class</jk>,
+ HtmlDocSerializer.<jk>class</jk>,
+ UrlEncodingSerializer.<jk>class</jk>,
+ SoapXmlSerializer.<jk>class</jk>,
+ RdfSerializer.Xml.<jk>class</jk>,
+ RdfSerializer.XmlAbbrev.<jk>class</jk>,
+ RdfSerializer.NTriple.<jk>class</jk>,
+ RdfSerializer.Turtle.<jk>class</jk>,
+ RdfSerializer.N3.<jk>class</jk>,
+ JavaSerializedObjectSerializer.<jk>class</jk>
+ },
+ parsers={
+ JsonParser.<jk>class</jk>,
+ XmlParser.<jk>class</jk>,
+ HtmlParser.<jk>class</jk>,
+ UrlEncodingParser.<jk>class</jk>,
+ RdfParser.Xml.<jk>class</jk>,
+ RdfParser.NTriple.<jk>class</jk>,
+ RdfParser.Turtle.<jk>class</jk>,
+ RdfParser.N3.<jk>class</jk>,
+ JavaSerializedObjectParser.<jk>class</jk>,
+ }
+ )
+ <jk>public final class</jk> DefaultJenaProvider <jk>extends</jk> BaseProvider {}
+ </p>
+ <p>
+ That's the entire class. It consists of only annotations to hook up media types to Juno serializers and parsers.<br>
+ The <ja>@Provider</ja>, <ja>@Produces</ja>, and <ja>@Consumes</ja> annotations are standard JAX-RS annotations, and the <ja>@JunoProvider</ja> annotation is from Juno.
+ </p>
+ <p>
+ To enable the provider, you need to make the JAX-RS environment aware of it.<br>
+ In Wink, this is accomplished by adding an entry to a config file.
+ </p>
+ <p class='bcode'>
+ <xt><web-app</xt> <xa>version</xa>=<xs>"2.3"</xs><xt>></xt>
+ <xt><servlet></xt>
+ <xt><servlet-name></xt>WinkService<xt></servlet-name></xt>
+ <xt><servlet-class></xt>org.apache.wink.server.internal.servlet.RestServlet<xt></servlet-class></xt>
+ <xt><init-param></xt>
+ <xt><param-name></xt>applicationConfigLocation<xt></param-name></xt>
+ <xt><param-value></xt>/WEB-INF/wink.cfg<xt></param-value></xt>
+ <xt></init-param></xt>
+ <xt></servlet></xt>
+ </p>
+ <p>
+ Simply include a reference to the provider in the configuration file.
+ <p class='bcode'>
+ com.ibm.juno.server.jaxrs.DefaultJenaProvider
+ </p>
+ <p>
+ Properties can be specified on providers through the {@link com.ibm.juno.server.jaxrs.JunoProvider#properties()} annotation.
+ </p>
+ <p>
+ Properties can also be specified at the method level by using the {@link com.ibm.juno.server.annotation.RestMethod#properties} annotation, like so:
+ </p>
+ <p class='bcode'>
+ <ja>@GET</ja>
+ <ja>@Produces</ja>(<js>"*/*"</js>)
+ <ja>@RestMethod</ja>( <jc>/* Override some properties */</jc>
+ properties={
+ <ja>@Property</ja>(name=RdfProperties.<jsf>RDF_rdfxml_tab</jsf>, value=<js>"3"</js>),
+ <ja>@Property</ja>(name=SerializerProperties.<jsf>SERIALIZER_quoteChar</jsf>, value=<js>"'"</js>)
+ }
+ )
+ <jk>public</jk> Message getMessage() {
+ <jk>return</jk> message;
+ }
+ </p>
+ <h6 class='topic'>Limitations</h6>
+ <p>
+ In general, the Juno REST API is considerably more flexible than the JAX-RS API, since you can specify and override
+ serializers, parsers, properties, filters, converters, guards, etc... at both the class and method levels.<br>
+ Therefore, the JAX-RS API has the following limitations that the Juno Server API does not:
+ </p>
+ <ul>
+ <li>The ability to specify different media type providers at the class and method levels.<br>
+ For example, you may want to use <code>RdfSerializer.Xml</code> with one set of properties on
+ one class, and another instance with different properties on another class.<br>
+ There is currently no way to define this at the class level.<br>
+ You can override properties at the method level, but this can be cumbersome since it would have to be
+ done for all methods in the resource.<br><br>
+ <li>The Juno Server API allows you to manipulate properties programatically through the {@link com.ibm.juno.server.RestResponse#setProperty(String,Object)}
+ method, and through the {@link com.ibm.juno.server.annotation.Properties} annotation.<br>
+ There is no equivalent in JAX-RS.
+ </ul>
+ </div>
+
+ <!-- ======================================================================================================== -->
+ <a id="BaseProvider"></a>
+ <h4 class='topic' onclick='toggle(this)'>4.1.4 - Using JAX-RS BaseProvider with annotations</h4>
+ <div class='topic'>
+ <p>
+ To provide support for only RDF media types, you can define your own provider class, like so:
+ </p>
+ <p class='bcode'>
+ <ja>@Provider</ja>
+ <ja>@Produces</ja>({
+ <js>"text/xml+rdf"</js>, <jc>// RdfSerializer.Xml</jc>
+ <js>"text/xml+rdf+abbrev"</js>, <jc>// RdfSerializer.XmlAbbrev</jc>
+ <js>"text/n-triple"</js>, <jc>// RdfSerializer.NTriple</jc>
+ <js>"text/turtle"</js>, <jc>// RdfSerializer.Turtle</jc>
+ <js>"text/n3"</js>, <jc>// RdfSerializer.N3</jc>
+ })
+ <ja>@Consumes</ja>({
+ <js>"text/xml+rdf"</js>, <jc>// RdfParser.Xml</jc>
+ <js>"text/n-triple"</js>, <jc>// RdfParser.NTriple</jc>
+ <js>"text/turtle"</js>, <jc>// RdfParser.Turtle</jc>
+ <js>"text/n3"</js>, <jc>// RdfParser.N3</jc>
+ })
+ <ja>@JunoProvider</ja>(
+ serializers={
+ RdfSerializer.Xml.<jk>class</jk>,
+ RdfSerializer.XmlAbbrev.<jk>class</jk>,
+ RdfSerializer.NTriple.<jk>class</jk>,
+ RdfSerializer.Turtle.<jk>class</jk>,
+ RdfSerializer.N3.<jk>class</jk>,
+ },
+ parsers={
+ RdfParser.Xml.<jk>class</jk>,
+ RdfParser.NTriple.<jk>class</jk>,
+ RdfParser.Turtle.<jk>class</jk>,
+ RdfParser.N3.<jk>class</jk>,
+ },
+ properties={
+ <ja>@Property</ja>(name=RdfProperties.<jsf>RDF_rdfxml_tab</jsf>, value=<js>"3"</js>),
+ <ja>@Property</ja>(name=SerializerProperties.<jsf>SERIALIZER_quoteChar</jsf>, value=<js>"'"</js>)
+ }
+ )
+ <jk>public final class</jk> MyRdfProvider <jk>extends</jk> BaseProvider {}
+ </p>
+ <p>
+ Then register it with Wink the same way as <code>DefaultJenaProvider</code>.
+ </p>
+ </div>
+
+ </div>
+
+ <!-- ======================================================================================================== -->
+ <a id="RestClientSupport"></a>
+ <h3 class='topic' onclick='toggle(this)'>4.2 - REST client support</h3>
+ <div class='topic'>
+ <p>
+ The {@link com.ibm.juno.client.RestClient} class provides an easy-to-use REST client interface with
+ pluggable media type handling using any of the Juno serializers and parsers.
+ </p>
+ <p>
+ Defining a client to support RDF media types on HTTP requests and responses can be done in one line of code:
+ </p>
+ <p class='bcode'>
+ <jc>// Create a client to handle RDF/XML requests and responses.</jc>
+ RestClient client = <jk>new</jk> RestClient(RdfSerializer.XmlAbbrev.<jk>class</jk>, RdfParser.Xml.<jk>class</jk>);
+ </p>
+ <p>
+ The client handles all content negotiation based on the registered serializers and parsers.
+ </p>
+ <p>
+ The following code is pulled from the main method of the <code>ClientTest</code> class in the sample web application, and
+ is run against the <code>AddressBookResource</code> class running within the sample app.
+ It shows how the client can be used to interact with the REST API while completely hiding the negotiated content type and working with nothing more than beans.
+ </p>
+ <p class='bcode'>
+ String root = <js>"http://localhost:9080/sample/addressBook"</js>;
+
+ <jc>// Get the current contents of the address book</jc>
+ AddressBook ab = client.doGet(root).getResponse(AddressBook.<jk>class</jk>);
+ System.<jsm>out</jsm>.println(<js>"Number of entries = "</js> + ab.size());
+
+ <jc>// Delete the existing entries</jc>
+ <jk>for</jk> (Person p : ab) {
+ String r = client.doDelete(p.<jf>uri</jf>).getResponse(String.<jk>class</jk>);
+ System.<jsm>out</jsm>.println(<js>"Deleted person "</js> + p.<jf>name</jf> + <js>", response = "</js> + r);
+ }
+
+ <jc>// Make sure they're gone</jc>
+ ab = client.doGet(root).getResponse(AddressBook.<jk>class</jk>);
+ System.<jsm>out</jsm>.println(<js>"Number of entries = "</js> + ab.size());
+
+ <jc>// Add 1st person again</jc>
+ CreatePerson cp = <jk>new</jk> CreatePerson(
+ <js>"Barack Obama"</js>,
+ <jsm>toCalendar</jsm>(<js>"Aug 4, 1961"</js>),
+ <jk>new</jk> CreateAddress(<js>"1600 Pennsylvania Ave"</js>, <js>"Washington"</js>, <js>"DC"</js>, 20500, <jk>true</jk>),
+ <jk>new</jk> CreateAddress(<js>"5046 S Greenwood Ave"</js>, <js>"Chicago"</js>, <js>"IL"</js>, 60615, <jk>false</jk>)
+ );
+ Person p = client.doPost(root + <js>"/people"</js>, cp).getResponse(Person.<jk>class</jk>);
+ System.<jsm>out</jsm>.println(<js>"Created person "</js> + p.<jf>name</jf> + <js>", uri = "</js> + p.<jf>uri</jf>);
+
+ <jc>// Add 2nd person again, but add addresses separately</jc>
+ cp = <jk>new</jk> CreatePerson(
+ <js>"George Walker Bush"</js>,
+ toCalendar(<js>"Jul 6, 1946"</js>)
+ );
+ p = client.doPost(root + <js>"/people"</js>, cp).getResponse(Person.<jk>class</jk>);
+ System.<jsm>out</jsm>.println(<js>"Created person "</js> + p.<jf>name</jf> + <js>", uri = "</js> + p.<jf>uri</jf>);
+
+ <jc>// Add addresses to 2nd person</jc>
+ CreateAddress ca = <jk>new</jk> CreateAddress(<js>"43 Prairie Chapel Rd"</js>, <js>"Crawford"</js>, <js>"TX"</js>, 76638, <jk>true</jk>);
+ Address a = client.doPost(p.<jf>uri</jf> + <js>"/addresses"</js>, ca).getResponse(Address.<jk>class</jk>);
+ System.<jsm>out</jsm>.println(<js>"Created address "</js> + a.<jf>uri</jf>);
+
+ ca = <jk>new</jk> CreateAddress(<js>"1600 Pennsylvania Ave"</js>, <js>"Washington"</js>, <js>"DC"</js>, 20500, <jk>false</jk>);
+ a = client.doPost(p.<jf>uri</jf> + "/addresses"</js>, ca).getResponse(Address.<jk>class</jk>);
+ System.<jsm>out</jsm>.println(<js>"Created address "</js> + a.<jf>uri</jf>);
+
+ <jc>// Find 1st person, and change name</jc>
+ Person[] pp = client.doGet(root + <js>"?q={name:\"'Barack+Obama'\"}"</js>).getResponse(Person[].<jk>class</jk>);
+ String r = client.doPut(pp[0].<jf>uri</jf> + <js>"/name"</js>, <js>"Barack Hussein Obama"</js>).getResponse(String.<jk>class</jk>);
+ System.<jsm>out</jsm>.println(<js>"Changed name, response = "</js> + r);
+ p = client.doGet(pp[0].<jf>uri</jf>).getResponse(Person.<jk>class</jk>);
+ System.<jsm>out</jsm>.println(<js>"New name = "</js> + p.<jf>name</jf>);
+ </p>
+ <p>
+ The code above produces the following output.
+ </p>
+ <p class='bcode'>
+ Number of entries = 2
+ Deleted person Barack Obama, response = DELETE successful
+ Deleted person George Walker Bush, response = DELETE successful
+ Number of entries = 0
+ Created person Barack Obama, uri = http://localhost:9080/sample/addressBook/people/3
+ Created person George Walker Bush, uri = http://localhost:9080/sample/addressBook/people/4
+ Created address http://localhost:9080/sample/addressBook/addresses/7
+ Created address http://localhost:9080/sample/addressBook/addresses/8
+ Changed name, response = PUT successful
+ New name = Barack Hussein Obama
+ </p>
+ </div>
+</div>
+<p align="center"><i><b>*** f�n ***</b></i></p>
+
+</body>
+</html>
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+/*******************************************************************************
+ * Licensed Materials - Property of IBM
+ * (c) Copyright IBM Corporation 2014, 2015. All Rights Reserved.
+ *
+ * The source code for this program is not published or otherwise
+ * divested of its trade secrets, irrespective of what has been
+ * deposited with the U.S. Copyright Office.
+ *******************************************************************************/
+package com.ibm.juno.core.jso;
+
+import java.io.*;
+
+import com.ibm.juno.core.*;
+import com.ibm.juno.core.annotation.*;
+import com.ibm.juno.core.parser.*;
+
+/**
+ * Parses POJOs from HTTP responses as Java {@link ObjectInputStream ObjectInputStreams}.
+ *
+ *
+ * <h6 class='topic'>Media types</h6>
+ * <p>
+ * Consumes <code>Content-Type</code> types: <code>application/x-java-serialized-object</code>
+ *
+ *
+ * @author James Bognar (jbognar@us.ibm.com)
+ */
+@Consumes("application/x-java-serialized-object")
+public final class JavaSerializedObjectParser extends InputStreamParser {
+
+ //--------------------------------------------------------------------------------
+ // Overridden methods
+ //--------------------------------------------------------------------------------
+
+ @SuppressWarnings("unchecked")
+ @Override /* InputStreamParser */
+ protected <T> T doParse(InputStream in, int estimatedSize, ClassMeta<T> type, ParserContext ctx) throws ParseException, IOException {
+ try {
+ ObjectInputStream ois = new ObjectInputStream(in);
+ return (T)ois.readObject();
+ } catch (ClassNotFoundException e) {
+ throw new ParseException(e);
+ }
+ }
+
+
+ @Override /* Lockable */
+ public JavaSerializedObjectParser clone() {
+ try {
+ return (JavaSerializedObjectParser)super.clone();
+ } catch (CloneNotSupportedException e) {
+ throw new RuntimeException(e); // Shouldn't happen
+ }
+ }
+}
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+/*******************************************************************************
+ * Licensed Materials - Property of IBM
+ * (c) Copyright IBM Corporation 2014, 2015. All Rights Reserved.
+ *
+ * The source code for this program is not published or otherwise
+ * divested of its trade secrets, irrespective of what has been
+ * deposited with the U.S. Copyright Office.
+ *******************************************************************************/
+package com.ibm.juno.core.jso;
+
+import java.io.*;
+
+import com.ibm.juno.core.annotation.*;
+import com.ibm.juno.core.serializer.*;
+
+/**
+ * Serializes POJOs to HTTP responses as Java {@link ObjectOutputStream ObjectOutputStreams}.
+ *
+ *
+ * <h6 class='topic'>Media types</h6>
+ * <p>
+ * Handles <code>Accept</code> types: <code>application/x-java-serialized-object</code>
+ * <p>
+ * Produces <code>Content-Type</code> types: <code>application/x-java-serialized-object</code>
+ *
+ *
+ * @author James Bognar (jbognar@us.ibm.com)
+ */
+@Produces("application/x-java-serialized-object")
+public final class JavaSerializedObjectSerializer extends OutputStreamSerializer {
+
+ //--------------------------------------------------------------------------------
+ // Overridden methods
+ //--------------------------------------------------------------------------------
+
+ @Override /* OutputStreamSerializer */
+ protected void doSerialize(Object o, OutputStream out, SerializerContext ctx) throws IOException, SerializeException {
+ ObjectOutputStream oos = new ObjectOutputStream(out);
+ oos.writeObject(o);
+ oos.flush();
+ oos.close();
+ }
+
+ @Override /* Serializer */
+ public JavaSerializedObjectSerializer clone() {
+ try {
+ return (JavaSerializedObjectSerializer)super.clone();
+ } catch (CloneNotSupportedException e) {
+ throw new RuntimeException(e); // Shouldn't happen
+ }
+ }
+}