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Posted to dev@xmlbeans.apache.org by nn <nn...@comcast.net> on 2004/06/23 02:50:21 UTC
A New approach for XPath using Namespace
Hi,
I come up with the new solution for namespace resolution for XPath in
XMLBeans.
the idea is to use taget document's targetNamespace information in XML
Schema(stored in schema class in XMLBeans generated class for XPath.
for instance, selectPath will internally use PurchaseOrderDocument to get
the targetNamespace information and use it for the default namespace for the
XPath.
PurchaseOrderDocument doc = PurchaseOrderDocument.Factory.parse(new
File("xml/data/po.xml"));
doc.selectPath("./purchaseOrder/shipTo[name = 'Helen Zoe']");
This will be processed successfully.
And if URI is something like http://a.b.c/d/e, it will use e as the prefix
for this
namespace.
so
doc.selectPath("./po:purchaseOrder/po:shipTo[po:name = 'Helen Zoe']");
is also accepted.
This is a convention, may not have to be supported.
I think this approach is quite appropriate for XML Schema assoiated
document.
Getting prefix information from target document are not so satisfactory for
it depends on the proper prefix usage of document.
This approach does not depend on the choice of prefix in the target
document.
in order to achieve this, XMLBean code generation must be changed so that it
provides the targetNamespace information in the generated class.
The current code generation does not maintaing this information.
Also I found a minor problem of JAXEN, we need to change a line so that it
can handle default namaespace.
nn
followings are the relevent codes.
-----
package xquery.engine.impl;
import java.io.File;
import org.apache.xmlbeans.XmlObject;
import com.example.po.*;
public class POTest {
private static String[] test_xpathes = new String[]{
"//po:purchaseOrder",
"./po:purchaseOrder/po:shipTo/po:name",
"./po:purchaseOrder/po:shipTo[po:name = 'Helen Zoe']",
"//purchaseOrder",
"./purchaseOrder/shipTo/name",
"./purchaseOrder/shipTo[name = 'Helen Zoe']",
};
public static void test() throws Throwable {
PurchaseOrderDocument doc = PurchaseOrderDocument.Factory.parse(new
File("xml/data/po.xml"));
for (int i = 0; i < test_xpathes.length; i++) {
String xpath = test_xpathes[i];
System.out.println("\n===== test: xpath: "+xpath+" =====");
filter(doc.selectPath(xpath));
}
}
public static void filter(XmlObject[] result) throws Throwable {
for (int i = 0; i < result.length; i++) {
XmlObject obj = result[i];
System.out.println(">> filter: "+obj.getClass()+", "+obj);
}
}
public static void main(String argv[]) {
try {
test();
} catch (Throwable err) {
err.printStackTrace();
}
}
}
-------
package org.apache.xmlbeans.impl.xpath.jaxen;
public class XBeansNamespace
{
public static void addNamespaces(BaseXPath baseXPath, XmlObject doc)
throws JaxenException {
SchemaTypeImpl sh = (SchemaTypeImpl)doc.schemaType();
// in order to get targetNamespace, xmlbean code generation must be
modified slightly
String uri = sh.getTargetNamespace();
// System.out.println(">> default namespace: "+uri);
if (uri != null) {
// default uri.
// in order to use default uri, a minor fix of jaxen is required.
baseXPath.addNamespace("", uri);
// from uri, http://a.b.c/c/d, use d for the prefix
// this is a common convention. may not have to be added..
int idx = uri.lastIndexOf("/");
if (idx >= 0) {
String prefix = uri.substring(idx+1);
baseXPath.addNamespace(prefix, uri);
}
}
}
}
-------
package org.apache.xmlbeans.impl.xpath.jaxen;
public class XBeansXPath extends BaseXPath
public List selectNodes(Object node) throws JaxenException
{
XmlCursor xc;
XmlObject xmlObj;
if (node instanceof XmlObject)
{
xmlObj = (XmlObject)node;
xc = xmlObj.newCursor();
}
else if (node instanceof XmlCursor)
{
xc = (XmlCursor)node;
xmlObj = xc.getObject();
xc = xc.newCursor();
}
else
throw new IllegalArgumentException("node must be an XmlObject or
an XmlCursor, found: " + node.getClass());
XBeansNamespace.addNamespaces(this, xmlObj); // nn (support xpath including
namespace)
((XBeansNavigator)getNavigator()).setCursor(xc);
return new ListImpl(super.selectNodes(
XBeansNavigator.getBookmarkInThisPlace(xc) ));
}
-----
package org.apache.xmlbeans.impl.xpath.jaxen;
public class XBeansXPathAdv
public List selectNodes(Object node) throws JaxenException
{
XmlCursor xc;
xc = ((XmlCursor)node);
XmlObject xmlObj = xc.getObject();
XBeansNamespace.addNamespaces(this, xmlObj);
((XBeansNavigator)getNavigator()).setCursor(xc);
return super.selectNodes(
XBeansNavigator.getBookmarkInThisPlace(xc) );
}
-----
SchemaTypeCodePrinter.java
package org.apache.xmlbeans.impl.schema;
....
// nn, store target namespace uri of document
void printSetParseContext(SchemaType sType) throws IOException {
String shortName = sType.getShortJavaImplName();
String baseClass = getBaseClass(sType);
System.out.println(">> printsetParseContext, shortName: "+shortName+",
baseClass: "+baseClass);
if (sType.isDocumentType()) {
QName name = sType.getDocumentElementName();
String uri = name.getNamespaceURI();
System.out.println(">> printsetParseContext, name: "+name+", uri:
"+uri);
if (uri != null && !uri.equals("")) {
emit("org.apache.xmlbeans.impl.schema.SchemaTypeImpl sh =
(org.apache.xmlbeans.impl.schema.SchemaTypeImpl)schemaType();"); // nn
emit("sh.setParseContext(null, \""+uri+"\", false, false);"); // nn
}
}
}
void printConstructor(SchemaType sType, String shortName) throws
IOException {
emit("");
emit("public " + shortName + "(org.apache.xmlbeans.SchemaType
sType)");
startBlock();
emit("super(sType" + (sType.getSimpleVariety() ==
SchemaType.NOT_SIMPLE ?
"":
", " + !sType.isSimpleType()) +
");");
printSetParseContext(sType); // nn
endBlock();
if (sType.getSimpleVariety() != SchemaType.NOT_SIMPLE)
{
emit("");
emit("protected " + shortName + "(org.apache.xmlbeans.SchemaType
sType, boolean b)");
startBlock();
emit("super(sType, b);");
printSetParseContext(sType); // nn
endBlock();
}
}
----
Jaxen (temporary) bug fix: to support defialy namespace:
package org.jaxen.expr;
..
public class DefaultNameStep extends DefaultStep implements NameStep {
...
public DefaultNameStep(IterableAxis axis,
String prefix,
String localName,
PredicateSet predicateSet) {
super(axis, predicateSet);
this.prefix = prefix;
this.localName = localName;
this.matchesAnyName = "*".equals(localName);
// this.hasPrefix = (this.prefix != null && this.prefix.length() >
0); // nn
this.hasPrefix = true; // should check default uri is defined or not
}
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Re: A New approach for XPath using Namespace
Posted by nn <nn...@comcast.net>.
> What if your namespace is http://a.b.c/c/d.xsd? Do you include d.xsd
> as the namespace? Is this even proper?
This portion is kind of optional, there is no good guidance for choosing
prefix from uri.
So for instance we may remove .xsd.
I think, using default namespace would be more appropriate and convenient.
nn
>
> Noah
>
> On Tue, 22 Jun 2004 17:50:21 -0700, nn <nn...@comcast.net> wrote:
> >
> > Hi,
> > I come up with the new solution for namespace resolution for XPath in
> > XMLBeans.
> > the idea is to use taget document's targetNamespace information in XML
> > Schema(stored in schema class in XMLBeans generated class for XPath.
> > for instance, selectPath will internally use PurchaseOrderDocument to
get
> > the targetNamespace information and use it for the default namespace for
the
> > XPath.
> >
> > PurchaseOrderDocument doc = PurchaseOrderDocument.Factory.parse(new
> > File("xml/data/po.xml"));
> > doc.selectPath("./purchaseOrder/shipTo[name = 'Helen Zoe']");
> >
> > This will be processed successfully.
> > And if URI is something like http://a.b.c/d/e, it will use e as the
prefix
> > for this
> > namespace.
> >
> > so
> > doc.selectPath("./po:purchaseOrder/po:shipTo[po:name = 'Helen
Zoe']");
> > is also accepted.
> >
> > This is a convention, may not have to be supported.
> > I think this approach is quite appropriate for XML Schema assoiated
> > document.
> > Getting prefix information from target document are not so satisfactory
for
> > it depends on the proper prefix usage of document.
> > This approach does not depend on the choice of prefix in the target
> > document.
> >
> > in order to achieve this, XMLBean code generation must be changed so
that it
> > provides the targetNamespace information in the generated class.
> > The current code generation does not maintaing this information.
> >
> > Also I found a minor problem of JAXEN, we need to change a line so that
it
> > can handle default namaespace.
> >
> > nn
> >
> > followings are the relevent codes.
> >
> > -----
> >
> > package xquery.engine.impl;
> >
> > import java.io.File;
> > import org.apache.xmlbeans.XmlObject;
> > import com.example.po.*;
> >
> > public class POTest {
> > private static String[] test_xpathes = new String[]{
> > "//po:purchaseOrder",
> > "./po:purchaseOrder/po:shipTo/po:name",
> > "./po:purchaseOrder/po:shipTo[po:name = 'Helen Zoe']",
> > "//purchaseOrder",
> > "./purchaseOrder/shipTo/name",
> > "./purchaseOrder/shipTo[name = 'Helen Zoe']",
> > };
> >
> > public static void test() throws Throwable {
> > PurchaseOrderDocument doc = PurchaseOrderDocument.Factory.parse(new
> > File("xml/data/po.xml"));
> > for (int i = 0; i < test_xpathes.length; i++) {
> > String xpath = test_xpathes[i];
> > System.out.println("\n===== test: xpath: "+xpath+" =====");
> > filter(doc.selectPath(xpath));
> > }
> > }
> > public static void filter(XmlObject[] result) throws Throwable {
> > for (int i = 0; i < result.length; i++) {
> > XmlObject obj = result[i];
> > System.out.println(">> filter: "+obj.getClass()+", "+obj);
> > }
> > }
> >
> > public static void main(String argv[]) {
> > try {
> > test();
> > } catch (Throwable err) {
> > err.printStackTrace();
> > }
> > }
> > }
> >
> > -------
> >
> > package org.apache.xmlbeans.impl.xpath.jaxen;
> >
> > public class XBeansNamespace
> > {
> > public static void addNamespaces(BaseXPath baseXPath, XmlObject doc)
> > throws JaxenException {
> > SchemaTypeImpl sh = (SchemaTypeImpl)doc.schemaType();
> >
> > // in order to get targetNamespace, xmlbean code generation must be
> > modified slightly
> > String uri = sh.getTargetNamespace();
> >
> > // System.out.println(">> default namespace: "+uri);
> > if (uri != null) {
> > // default uri.
> > // in order to use default uri, a minor fix of jaxen is required.
> > baseXPath.addNamespace("", uri);
> >
> > // from uri, http://a.b.c/c/d, use d for the prefix
> > // this is a common convention. may not have to be added..
> > int idx = uri.lastIndexOf("/");
> > if (idx >= 0) {
> > String prefix = uri.substring(idx+1);
> > baseXPath.addNamespace(prefix, uri);
> > }
> > }
> > }
> >
> > }
> >
> > -------
> > package org.apache.xmlbeans.impl.xpath.jaxen;
> >
> > public class XBeansXPath extends BaseXPath
> > public List selectNodes(Object node) throws JaxenException
> > {
> > XmlCursor xc;
> > XmlObject xmlObj;
> > if (node instanceof XmlObject)
> > {
> > xmlObj = (XmlObject)node;
> > xc = xmlObj.newCursor();
> > }
> > else if (node instanceof XmlCursor)
> > {
> > xc = (XmlCursor)node;
> > xmlObj = xc.getObject();
> > xc = xc.newCursor();
> > }
> > else
> > throw new IllegalArgumentException("node must be an
XmlObject or
> > an XmlCursor, found: " + node.getClass());
> >
> > XBeansNamespace.addNamespaces(this, xmlObj); // nn (support xpath
including
> > namespace)
> > ((XBeansNavigator)getNavigator()).setCursor(xc);
> > return new ListImpl(super.selectNodes(
> > XBeansNavigator.getBookmarkInThisPlace(xc) ));
> > }
> >
> > -----
> > package org.apache.xmlbeans.impl.xpath.jaxen;
> >
> > public class XBeansXPathAdv
> >
> > public List selectNodes(Object node) throws JaxenException
> > {
> > XmlCursor xc;
> > xc = ((XmlCursor)node);
> > XmlObject xmlObj = xc.getObject();
> > XBeansNamespace.addNamespaces(this, xmlObj);
> > ((XBeansNavigator)getNavigator()).setCursor(xc);
> > return super.selectNodes(
> > XBeansNavigator.getBookmarkInThisPlace(xc) );
> > }
> >
> > -----
> >
> > SchemaTypeCodePrinter.java
> >
> > package org.apache.xmlbeans.impl.schema;
> > ....
> >
> > // nn, store target namespace uri of document
> > void printSetParseContext(SchemaType sType) throws IOException {
> > String shortName = sType.getShortJavaImplName();
> > String baseClass = getBaseClass(sType);
> > System.out.println(">> printsetParseContext, shortName: "+shortName+",
> > baseClass: "+baseClass);
> > if (sType.isDocumentType()) {
> > QName name = sType.getDocumentElementName();
> > String uri = name.getNamespaceURI();
> > System.out.println(">> printsetParseContext, name: "+name+", uri:
> > "+uri);
> > if (uri != null && !uri.equals("")) {
> > emit("org.apache.xmlbeans.impl.schema.SchemaTypeImpl sh =
> > (org.apache.xmlbeans.impl.schema.SchemaTypeImpl)schemaType();"); // nn
> > emit("sh.setParseContext(null, \""+uri+"\", false, false);"); // nn
> > }
> > }
> > }
> > void printConstructor(SchemaType sType, String shortName) throws
> > IOException {
> > emit("");
> > emit("public " + shortName + "(org.apache.xmlbeans.SchemaType
> > sType)");
> > startBlock();
> > emit("super(sType" + (sType.getSimpleVariety() ==
> > SchemaType.NOT_SIMPLE ?
> > "":
> > ", " + !sType.isSimpleType()) +
> > ");");
> > printSetParseContext(sType); // nn
> > endBlock();
> >
> > if (sType.getSimpleVariety() != SchemaType.NOT_SIMPLE)
> > {
> > emit("");
> > emit("protected " + shortName +
"(org.apache.xmlbeans.SchemaType
> > sType, boolean b)");
> > startBlock();
> > emit("super(sType, b);");
> > printSetParseContext(sType); // nn
> > endBlock();
> > }
> > }
> >
> > ----
> > Jaxen (temporary) bug fix: to support defialy namespace:
> > package org.jaxen.expr;
> > ..
> > public class DefaultNameStep extends DefaultStep implements NameStep {
> > ...
> > public DefaultNameStep(IterableAxis axis,
> > String prefix,
> > String localName,
> > PredicateSet predicateSet) {
> > super(axis, predicateSet);
> >
> > this.prefix = prefix;
> > this.localName = localName;
> > this.matchesAnyName = "*".equals(localName);
> > // this.hasPrefix = (this.prefix != null && this.prefix.length()
>
> > 0); // nn
> > this.hasPrefix = true; // should check default uri is defined or
not
> > }
> >
> > - ---------------------------------------------------------------------
> > To unsubscribe, e-mail: xmlbeans-dev-unsubscribe@xml.apache.org
> > For additional commands, e-mail: xmlbeans-dev-help@xml.apache.org
> > Apache XMLBeans Project -- URL: http://xml.apache.org/xmlbeans/
> >
> >
>
> - ---------------------------------------------------------------------
> To unsubscribe, e-mail: xmlbeans-dev-unsubscribe@xml.apache.org
> For additional commands, e-mail: xmlbeans-dev-help@xml.apache.org
> Apache XMLBeans Project -- URL: http://xml.apache.org/xmlbeans/
>
- ---------------------------------------------------------------------
To unsubscribe, e-mail: xmlbeans-dev-unsubscribe@xml.apache.org
For additional commands, e-mail: xmlbeans-dev-help@xml.apache.org
Apache XMLBeans Project -- URL: http://xml.apache.org/xmlbeans/
Re: A New approach for XPath using Namespace
Posted by nn <nn...@comcast.net>.
> What if your namespace is http://a.b.c/c/d.xsd? Do you include d.xsd
> as the namespace? Is this even proper?
This portion is kind of optional, there is no good guidance for choosing
prefix from uri.
So for instance we may remove .xsd.
I think, using default namespace would be more appropriate and convenient.
nn
>
> Noah
>
> On Tue, 22 Jun 2004 17:50:21 -0700, nn <nn...@comcast.net> wrote:
> >
> > Hi,
> > I come up with the new solution for namespace resolution for XPath in
> > XMLBeans.
> > the idea is to use taget document's targetNamespace information in XML
> > Schema(stored in schema class in XMLBeans generated class for XPath.
> > for instance, selectPath will internally use PurchaseOrderDocument to
get
> > the targetNamespace information and use it for the default namespace for
the
> > XPath.
> >
> > PurchaseOrderDocument doc = PurchaseOrderDocument.Factory.parse(new
> > File("xml/data/po.xml"));
> > doc.selectPath("./purchaseOrder/shipTo[name = 'Helen Zoe']");
> >
> > This will be processed successfully.
> > And if URI is something like http://a.b.c/d/e, it will use e as the
prefix
> > for this
> > namespace.
> >
> > so
> > doc.selectPath("./po:purchaseOrder/po:shipTo[po:name = 'Helen
Zoe']");
> > is also accepted.
> >
> > This is a convention, may not have to be supported.
> > I think this approach is quite appropriate for XML Schema assoiated
> > document.
> > Getting prefix information from target document are not so satisfactory
for
> > it depends on the proper prefix usage of document.
> > This approach does not depend on the choice of prefix in the target
> > document.
> >
> > in order to achieve this, XMLBean code generation must be changed so
that it
> > provides the targetNamespace information in the generated class.
> > The current code generation does not maintaing this information.
> >
> > Also I found a minor problem of JAXEN, we need to change a line so that
it
> > can handle default namaespace.
> >
> > nn
> >
> > followings are the relevent codes.
> >
> > -----
> >
> > package xquery.engine.impl;
> >
> > import java.io.File;
> > import org.apache.xmlbeans.XmlObject;
> > import com.example.po.*;
> >
> > public class POTest {
> > private static String[] test_xpathes = new String[]{
> > "//po:purchaseOrder",
> > "./po:purchaseOrder/po:shipTo/po:name",
> > "./po:purchaseOrder/po:shipTo[po:name = 'Helen Zoe']",
> > "//purchaseOrder",
> > "./purchaseOrder/shipTo/name",
> > "./purchaseOrder/shipTo[name = 'Helen Zoe']",
> > };
> >
> > public static void test() throws Throwable {
> > PurchaseOrderDocument doc = PurchaseOrderDocument.Factory.parse(new
> > File("xml/data/po.xml"));
> > for (int i = 0; i < test_xpathes.length; i++) {
> > String xpath = test_xpathes[i];
> > System.out.println("\n===== test: xpath: "+xpath+" =====");
> > filter(doc.selectPath(xpath));
> > }
> > }
> > public static void filter(XmlObject[] result) throws Throwable {
> > for (int i = 0; i < result.length; i++) {
> > XmlObject obj = result[i];
> > System.out.println(">> filter: "+obj.getClass()+", "+obj);
> > }
> > }
> >
> > public static void main(String argv[]) {
> > try {
> > test();
> > } catch (Throwable err) {
> > err.printStackTrace();
> > }
> > }
> > }
> >
> > -------
> >
> > package org.apache.xmlbeans.impl.xpath.jaxen;
> >
> > public class XBeansNamespace
> > {
> > public static void addNamespaces(BaseXPath baseXPath, XmlObject doc)
> > throws JaxenException {
> > SchemaTypeImpl sh = (SchemaTypeImpl)doc.schemaType();
> >
> > // in order to get targetNamespace, xmlbean code generation must be
> > modified slightly
> > String uri = sh.getTargetNamespace();
> >
> > // System.out.println(">> default namespace: "+uri);
> > if (uri != null) {
> > // default uri.
> > // in order to use default uri, a minor fix of jaxen is required.
> > baseXPath.addNamespace("", uri);
> >
> > // from uri, http://a.b.c/c/d, use d for the prefix
> > // this is a common convention. may not have to be added..
> > int idx = uri.lastIndexOf("/");
> > if (idx >= 0) {
> > String prefix = uri.substring(idx+1);
> > baseXPath.addNamespace(prefix, uri);
> > }
> > }
> > }
> >
> > }
> >
> > -------
> > package org.apache.xmlbeans.impl.xpath.jaxen;
> >
> > public class XBeansXPath extends BaseXPath
> > public List selectNodes(Object node) throws JaxenException
> > {
> > XmlCursor xc;
> > XmlObject xmlObj;
> > if (node instanceof XmlObject)
> > {
> > xmlObj = (XmlObject)node;
> > xc = xmlObj.newCursor();
> > }
> > else if (node instanceof XmlCursor)
> > {
> > xc = (XmlCursor)node;
> > xmlObj = xc.getObject();
> > xc = xc.newCursor();
> > }
> > else
> > throw new IllegalArgumentException("node must be an
XmlObject or
> > an XmlCursor, found: " + node.getClass());
> >
> > XBeansNamespace.addNamespaces(this, xmlObj); // nn (support xpath
including
> > namespace)
> > ((XBeansNavigator)getNavigator()).setCursor(xc);
> > return new ListImpl(super.selectNodes(
> > XBeansNavigator.getBookmarkInThisPlace(xc) ));
> > }
> >
> > -----
> > package org.apache.xmlbeans.impl.xpath.jaxen;
> >
> > public class XBeansXPathAdv
> >
> > public List selectNodes(Object node) throws JaxenException
> > {
> > XmlCursor xc;
> > xc = ((XmlCursor)node);
> > XmlObject xmlObj = xc.getObject();
> > XBeansNamespace.addNamespaces(this, xmlObj);
> > ((XBeansNavigator)getNavigator()).setCursor(xc);
> > return super.selectNodes(
> > XBeansNavigator.getBookmarkInThisPlace(xc) );
> > }
> >
> > -----
> >
> > SchemaTypeCodePrinter.java
> >
> > package org.apache.xmlbeans.impl.schema;
> > ....
> >
> > // nn, store target namespace uri of document
> > void printSetParseContext(SchemaType sType) throws IOException {
> > String shortName = sType.getShortJavaImplName();
> > String baseClass = getBaseClass(sType);
> > System.out.println(">> printsetParseContext, shortName: "+shortName+",
> > baseClass: "+baseClass);
> > if (sType.isDocumentType()) {
> > QName name = sType.getDocumentElementName();
> > String uri = name.getNamespaceURI();
> > System.out.println(">> printsetParseContext, name: "+name+", uri:
> > "+uri);
> > if (uri != null && !uri.equals("")) {
> > emit("org.apache.xmlbeans.impl.schema.SchemaTypeImpl sh =
> > (org.apache.xmlbeans.impl.schema.SchemaTypeImpl)schemaType();"); // nn
> > emit("sh.setParseContext(null, \""+uri+"\", false, false);"); // nn
> > }
> > }
> > }
> > void printConstructor(SchemaType sType, String shortName) throws
> > IOException {
> > emit("");
> > emit("public " + shortName + "(org.apache.xmlbeans.SchemaType
> > sType)");
> > startBlock();
> > emit("super(sType" + (sType.getSimpleVariety() ==
> > SchemaType.NOT_SIMPLE ?
> > "":
> > ", " + !sType.isSimpleType()) +
> > ");");
> > printSetParseContext(sType); // nn
> > endBlock();
> >
> > if (sType.getSimpleVariety() != SchemaType.NOT_SIMPLE)
> > {
> > emit("");
> > emit("protected " + shortName +
"(org.apache.xmlbeans.SchemaType
> > sType, boolean b)");
> > startBlock();
> > emit("super(sType, b);");
> > printSetParseContext(sType); // nn
> > endBlock();
> > }
> > }
> >
> > ----
> > Jaxen (temporary) bug fix: to support defialy namespace:
> > package org.jaxen.expr;
> > ..
> > public class DefaultNameStep extends DefaultStep implements NameStep {
> > ...
> > public DefaultNameStep(IterableAxis axis,
> > String prefix,
> > String localName,
> > PredicateSet predicateSet) {
> > super(axis, predicateSet);
> >
> > this.prefix = prefix;
> > this.localName = localName;
> > this.matchesAnyName = "*".equals(localName);
> > // this.hasPrefix = (this.prefix != null && this.prefix.length()
>
> > 0); // nn
> > this.hasPrefix = true; // should check default uri is defined or
not
> > }
> >
> > - ---------------------------------------------------------------------
> > To unsubscribe, e-mail: xmlbeans-dev-unsubscribe@xml.apache.org
> > For additional commands, e-mail: xmlbeans-dev-help@xml.apache.org
> > Apache XMLBeans Project -- URL: http://xml.apache.org/xmlbeans/
> >
> >
>
> - ---------------------------------------------------------------------
> To unsubscribe, e-mail: xmlbeans-dev-unsubscribe@xml.apache.org
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>
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Re: A New approach for XPath using Namespace
Posted by Noah Campbell <no...@gmail.com>.
What if your namespace is http://a.b.c/c/d.xsd? Do you include d.xsd
as the namespace? Is this even proper?
Noah
On Tue, 22 Jun 2004 17:50:21 -0700, nn <nn...@comcast.net> wrote:
>
> Hi,
> I come up with the new solution for namespace resolution for XPath in
> XMLBeans.
> the idea is to use taget document's targetNamespace information in XML
> Schema(stored in schema class in XMLBeans generated class for XPath.
> for instance, selectPath will internally use PurchaseOrderDocument to get
> the targetNamespace information and use it for the default namespace for the
> XPath.
>
> PurchaseOrderDocument doc = PurchaseOrderDocument.Factory.parse(new
> File("xml/data/po.xml"));
> doc.selectPath("./purchaseOrder/shipTo[name = 'Helen Zoe']");
>
> This will be processed successfully.
> And if URI is something like http://a.b.c/d/e, it will use e as the prefix
> for this
> namespace.
>
> so
> doc.selectPath("./po:purchaseOrder/po:shipTo[po:name = 'Helen Zoe']");
> is also accepted.
>
> This is a convention, may not have to be supported.
> I think this approach is quite appropriate for XML Schema assoiated
> document.
> Getting prefix information from target document are not so satisfactory for
> it depends on the proper prefix usage of document.
> This approach does not depend on the choice of prefix in the target
> document.
>
> in order to achieve this, XMLBean code generation must be changed so that it
> provides the targetNamespace information in the generated class.
> The current code generation does not maintaing this information.
>
> Also I found a minor problem of JAXEN, we need to change a line so that it
> can handle default namaespace.
>
> nn
>
> followings are the relevent codes.
>
> -----
>
> package xquery.engine.impl;
>
> import java.io.File;
> import org.apache.xmlbeans.XmlObject;
> import com.example.po.*;
>
> public class POTest {
> private static String[] test_xpathes = new String[]{
> "//po:purchaseOrder",
> "./po:purchaseOrder/po:shipTo/po:name",
> "./po:purchaseOrder/po:shipTo[po:name = 'Helen Zoe']",
> "//purchaseOrder",
> "./purchaseOrder/shipTo/name",
> "./purchaseOrder/shipTo[name = 'Helen Zoe']",
> };
>
> public static void test() throws Throwable {
> PurchaseOrderDocument doc = PurchaseOrderDocument.Factory.parse(new
> File("xml/data/po.xml"));
> for (int i = 0; i < test_xpathes.length; i++) {
> String xpath = test_xpathes[i];
> System.out.println("\n===== test: xpath: "+xpath+" =====");
> filter(doc.selectPath(xpath));
> }
> }
> public static void filter(XmlObject[] result) throws Throwable {
> for (int i = 0; i < result.length; i++) {
> XmlObject obj = result[i];
> System.out.println(">> filter: "+obj.getClass()+", "+obj);
> }
> }
>
> public static void main(String argv[]) {
> try {
> test();
> } catch (Throwable err) {
> err.printStackTrace();
> }
> }
> }
>
> -------
>
> package org.apache.xmlbeans.impl.xpath.jaxen;
>
> public class XBeansNamespace
> {
> public static void addNamespaces(BaseXPath baseXPath, XmlObject doc)
> throws JaxenException {
> SchemaTypeImpl sh = (SchemaTypeImpl)doc.schemaType();
>
> // in order to get targetNamespace, xmlbean code generation must be
> modified slightly
> String uri = sh.getTargetNamespace();
>
> // System.out.println(">> default namespace: "+uri);
> if (uri != null) {
> // default uri.
> // in order to use default uri, a minor fix of jaxen is required.
> baseXPath.addNamespace("", uri);
>
> // from uri, http://a.b.c/c/d, use d for the prefix
> // this is a common convention. may not have to be added..
> int idx = uri.lastIndexOf("/");
> if (idx >= 0) {
> String prefix = uri.substring(idx+1);
> baseXPath.addNamespace(prefix, uri);
> }
> }
> }
>
> }
>
> -------
> package org.apache.xmlbeans.impl.xpath.jaxen;
>
> public class XBeansXPath extends BaseXPath
> public List selectNodes(Object node) throws JaxenException
> {
> XmlCursor xc;
> XmlObject xmlObj;
> if (node instanceof XmlObject)
> {
> xmlObj = (XmlObject)node;
> xc = xmlObj.newCursor();
> }
> else if (node instanceof XmlCursor)
> {
> xc = (XmlCursor)node;
> xmlObj = xc.getObject();
> xc = xc.newCursor();
> }
> else
> throw new IllegalArgumentException("node must be an XmlObject or
> an XmlCursor, found: " + node.getClass());
>
> XBeansNamespace.addNamespaces(this, xmlObj); // nn (support xpath including
> namespace)
> ((XBeansNavigator)getNavigator()).setCursor(xc);
> return new ListImpl(super.selectNodes(
> XBeansNavigator.getBookmarkInThisPlace(xc) ));
> }
>
> -----
> package org.apache.xmlbeans.impl.xpath.jaxen;
>
> public class XBeansXPathAdv
>
> public List selectNodes(Object node) throws JaxenException
> {
> XmlCursor xc;
> xc = ((XmlCursor)node);
> XmlObject xmlObj = xc.getObject();
> XBeansNamespace.addNamespaces(this, xmlObj);
> ((XBeansNavigator)getNavigator()).setCursor(xc);
> return super.selectNodes(
> XBeansNavigator.getBookmarkInThisPlace(xc) );
> }
>
> -----
>
> SchemaTypeCodePrinter.java
>
> package org.apache.xmlbeans.impl.schema;
> ....
>
> // nn, store target namespace uri of document
> void printSetParseContext(SchemaType sType) throws IOException {
> String shortName = sType.getShortJavaImplName();
> String baseClass = getBaseClass(sType);
> System.out.println(">> printsetParseContext, shortName: "+shortName+",
> baseClass: "+baseClass);
> if (sType.isDocumentType()) {
> QName name = sType.getDocumentElementName();
> String uri = name.getNamespaceURI();
> System.out.println(">> printsetParseContext, name: "+name+", uri:
> "+uri);
> if (uri != null && !uri.equals("")) {
> emit("org.apache.xmlbeans.impl.schema.SchemaTypeImpl sh =
> (org.apache.xmlbeans.impl.schema.SchemaTypeImpl)schemaType();"); // nn
> emit("sh.setParseContext(null, \""+uri+"\", false, false);"); // nn
> }
> }
> }
> void printConstructor(SchemaType sType, String shortName) throws
> IOException {
> emit("");
> emit("public " + shortName + "(org.apache.xmlbeans.SchemaType
> sType)");
> startBlock();
> emit("super(sType" + (sType.getSimpleVariety() ==
> SchemaType.NOT_SIMPLE ?
> "":
> ", " + !sType.isSimpleType()) +
> ");");
> printSetParseContext(sType); // nn
> endBlock();
>
> if (sType.getSimpleVariety() != SchemaType.NOT_SIMPLE)
> {
> emit("");
> emit("protected " + shortName + "(org.apache.xmlbeans.SchemaType
> sType, boolean b)");
> startBlock();
> emit("super(sType, b);");
> printSetParseContext(sType); // nn
> endBlock();
> }
> }
>
> ----
> Jaxen (temporary) bug fix: to support defialy namespace:
> package org.jaxen.expr;
> ..
> public class DefaultNameStep extends DefaultStep implements NameStep {
> ...
> public DefaultNameStep(IterableAxis axis,
> String prefix,
> String localName,
> PredicateSet predicateSet) {
> super(axis, predicateSet);
>
> this.prefix = prefix;
> this.localName = localName;
> this.matchesAnyName = "*".equals(localName);
> // this.hasPrefix = (this.prefix != null && this.prefix.length() >
> 0); // nn
> this.hasPrefix = true; // should check default uri is defined or not
> }
>
> - ---------------------------------------------------------------------
> To unsubscribe, e-mail: xmlbeans-dev-unsubscribe@xml.apache.org
> For additional commands, e-mail: xmlbeans-dev-help@xml.apache.org
> Apache XMLBeans Project -- URL: http://xml.apache.org/xmlbeans/
>
>
- ---------------------------------------------------------------------
To unsubscribe, e-mail: xmlbeans-dev-unsubscribe@xml.apache.org
For additional commands, e-mail: xmlbeans-dev-help@xml.apache.org
Apache XMLBeans Project -- URL: http://xml.apache.org/xmlbeans/
Re: A New approach for XPath using Namespace
Posted by Noah Campbell <no...@gmail.com>.
What if your namespace is http://a.b.c/c/d.xsd? Do you include d.xsd
as the namespace? Is this even proper?
Noah
On Tue, 22 Jun 2004 17:50:21 -0700, nn <nn...@comcast.net> wrote:
>
> Hi,
> I come up with the new solution for namespace resolution for XPath in
> XMLBeans.
> the idea is to use taget document's targetNamespace information in XML
> Schema(stored in schema class in XMLBeans generated class for XPath.
> for instance, selectPath will internally use PurchaseOrderDocument to get
> the targetNamespace information and use it for the default namespace for the
> XPath.
>
> PurchaseOrderDocument doc = PurchaseOrderDocument.Factory.parse(new
> File("xml/data/po.xml"));
> doc.selectPath("./purchaseOrder/shipTo[name = 'Helen Zoe']");
>
> This will be processed successfully.
> And if URI is something like http://a.b.c/d/e, it will use e as the prefix
> for this
> namespace.
>
> so
> doc.selectPath("./po:purchaseOrder/po:shipTo[po:name = 'Helen Zoe']");
> is also accepted.
>
> This is a convention, may not have to be supported.
> I think this approach is quite appropriate for XML Schema assoiated
> document.
> Getting prefix information from target document are not so satisfactory for
> it depends on the proper prefix usage of document.
> This approach does not depend on the choice of prefix in the target
> document.
>
> in order to achieve this, XMLBean code generation must be changed so that it
> provides the targetNamespace information in the generated class.
> The current code generation does not maintaing this information.
>
> Also I found a minor problem of JAXEN, we need to change a line so that it
> can handle default namaespace.
>
> nn
>
> followings are the relevent codes.
>
> -----
>
> package xquery.engine.impl;
>
> import java.io.File;
> import org.apache.xmlbeans.XmlObject;
> import com.example.po.*;
>
> public class POTest {
> private static String[] test_xpathes = new String[]{
> "//po:purchaseOrder",
> "./po:purchaseOrder/po:shipTo/po:name",
> "./po:purchaseOrder/po:shipTo[po:name = 'Helen Zoe']",
> "//purchaseOrder",
> "./purchaseOrder/shipTo/name",
> "./purchaseOrder/shipTo[name = 'Helen Zoe']",
> };
>
> public static void test() throws Throwable {
> PurchaseOrderDocument doc = PurchaseOrderDocument.Factory.parse(new
> File("xml/data/po.xml"));
> for (int i = 0; i < test_xpathes.length; i++) {
> String xpath = test_xpathes[i];
> System.out.println("\n===== test: xpath: "+xpath+" =====");
> filter(doc.selectPath(xpath));
> }
> }
> public static void filter(XmlObject[] result) throws Throwable {
> for (int i = 0; i < result.length; i++) {
> XmlObject obj = result[i];
> System.out.println(">> filter: "+obj.getClass()+", "+obj);
> }
> }
>
> public static void main(String argv[]) {
> try {
> test();
> } catch (Throwable err) {
> err.printStackTrace();
> }
> }
> }
>
> -------
>
> package org.apache.xmlbeans.impl.xpath.jaxen;
>
> public class XBeansNamespace
> {
> public static void addNamespaces(BaseXPath baseXPath, XmlObject doc)
> throws JaxenException {
> SchemaTypeImpl sh = (SchemaTypeImpl)doc.schemaType();
>
> // in order to get targetNamespace, xmlbean code generation must be
> modified slightly
> String uri = sh.getTargetNamespace();
>
> // System.out.println(">> default namespace: "+uri);
> if (uri != null) {
> // default uri.
> // in order to use default uri, a minor fix of jaxen is required.
> baseXPath.addNamespace("", uri);
>
> // from uri, http://a.b.c/c/d, use d for the prefix
> // this is a common convention. may not have to be added..
> int idx = uri.lastIndexOf("/");
> if (idx >= 0) {
> String prefix = uri.substring(idx+1);
> baseXPath.addNamespace(prefix, uri);
> }
> }
> }
>
> }
>
> -------
> package org.apache.xmlbeans.impl.xpath.jaxen;
>
> public class XBeansXPath extends BaseXPath
> public List selectNodes(Object node) throws JaxenException
> {
> XmlCursor xc;
> XmlObject xmlObj;
> if (node instanceof XmlObject)
> {
> xmlObj = (XmlObject)node;
> xc = xmlObj.newCursor();
> }
> else if (node instanceof XmlCursor)
> {
> xc = (XmlCursor)node;
> xmlObj = xc.getObject();
> xc = xc.newCursor();
> }
> else
> throw new IllegalArgumentException("node must be an XmlObject or
> an XmlCursor, found: " + node.getClass());
>
> XBeansNamespace.addNamespaces(this, xmlObj); // nn (support xpath including
> namespace)
> ((XBeansNavigator)getNavigator()).setCursor(xc);
> return new ListImpl(super.selectNodes(
> XBeansNavigator.getBookmarkInThisPlace(xc) ));
> }
>
> -----
> package org.apache.xmlbeans.impl.xpath.jaxen;
>
> public class XBeansXPathAdv
>
> public List selectNodes(Object node) throws JaxenException
> {
> XmlCursor xc;
> xc = ((XmlCursor)node);
> XmlObject xmlObj = xc.getObject();
> XBeansNamespace.addNamespaces(this, xmlObj);
> ((XBeansNavigator)getNavigator()).setCursor(xc);
> return super.selectNodes(
> XBeansNavigator.getBookmarkInThisPlace(xc) );
> }
>
> -----
>
> SchemaTypeCodePrinter.java
>
> package org.apache.xmlbeans.impl.schema;
> ....
>
> // nn, store target namespace uri of document
> void printSetParseContext(SchemaType sType) throws IOException {
> String shortName = sType.getShortJavaImplName();
> String baseClass = getBaseClass(sType);
> System.out.println(">> printsetParseContext, shortName: "+shortName+",
> baseClass: "+baseClass);
> if (sType.isDocumentType()) {
> QName name = sType.getDocumentElementName();
> String uri = name.getNamespaceURI();
> System.out.println(">> printsetParseContext, name: "+name+", uri:
> "+uri);
> if (uri != null && !uri.equals("")) {
> emit("org.apache.xmlbeans.impl.schema.SchemaTypeImpl sh =
> (org.apache.xmlbeans.impl.schema.SchemaTypeImpl)schemaType();"); // nn
> emit("sh.setParseContext(null, \""+uri+"\", false, false);"); // nn
> }
> }
> }
> void printConstructor(SchemaType sType, String shortName) throws
> IOException {
> emit("");
> emit("public " + shortName + "(org.apache.xmlbeans.SchemaType
> sType)");
> startBlock();
> emit("super(sType" + (sType.getSimpleVariety() ==
> SchemaType.NOT_SIMPLE ?
> "":
> ", " + !sType.isSimpleType()) +
> ");");
> printSetParseContext(sType); // nn
> endBlock();
>
> if (sType.getSimpleVariety() != SchemaType.NOT_SIMPLE)
> {
> emit("");
> emit("protected " + shortName + "(org.apache.xmlbeans.SchemaType
> sType, boolean b)");
> startBlock();
> emit("super(sType, b);");
> printSetParseContext(sType); // nn
> endBlock();
> }
> }
>
> ----
> Jaxen (temporary) bug fix: to support defialy namespace:
> package org.jaxen.expr;
> ..
> public class DefaultNameStep extends DefaultStep implements NameStep {
> ...
> public DefaultNameStep(IterableAxis axis,
> String prefix,
> String localName,
> PredicateSet predicateSet) {
> super(axis, predicateSet);
>
> this.prefix = prefix;
> this.localName = localName;
> this.matchesAnyName = "*".equals(localName);
> // this.hasPrefix = (this.prefix != null && this.prefix.length() >
> 0); // nn
> this.hasPrefix = true; // should check default uri is defined or not
> }
>
> - ---------------------------------------------------------------------
> To unsubscribe, e-mail: xmlbeans-dev-unsubscribe@xml.apache.org
> For additional commands, e-mail: xmlbeans-dev-help@xml.apache.org
> Apache XMLBeans Project -- URL: http://xml.apache.org/xmlbeans/
>
>
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For additional commands, e-mail: xmlbeans-dev-help@xml.apache.org
Apache XMLBeans Project -- URL: http://xml.apache.org/xmlbeans/