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Posted to commits@tuscany.apache.org by rf...@apache.org on 2007/03/02 07:32:27 UTC
svn commit: r513629 [3/3] - in
/incubator/tuscany/branches/sca-java-integration/sca/kernel/core/src:
main/java/org/apache/tuscany/core/databinding/javabeans/
main/java/org/apache/tuscany/core/databinding/xml/
test/java/org/apache/tuscany/core/databindi...
Added: incubator/tuscany/branches/sca-java-integration/sca/kernel/core/src/main/java/org/apache/tuscany/core/databinding/xml/XMLFragmentStreamReaderImpl.java
URL: http://svn.apache.org/viewvc/incubator/tuscany/branches/sca-java-integration/sca/kernel/core/src/main/java/org/apache/tuscany/core/databinding/xml/XMLFragmentStreamReaderImpl.java?view=auto&rev=513629
==============================================================================
--- incubator/tuscany/branches/sca-java-integration/sca/kernel/core/src/main/java/org/apache/tuscany/core/databinding/xml/XMLFragmentStreamReaderImpl.java (added)
+++ incubator/tuscany/branches/sca-java-integration/sca/kernel/core/src/main/java/org/apache/tuscany/core/databinding/xml/XMLFragmentStreamReaderImpl.java Thu Mar 1 22:32:26 2007
@@ -0,0 +1,856 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.core.databinding.xml;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.xml.namespace.NamespaceContext;
+import javax.xml.namespace.QName;
+import javax.xml.stream.Location;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamReader;
+
+/**
+ * This is the new implementation of the XMLFramentStreamReader. The approach
+ * here is simple When the pull parser needs to generate events for a particular
+ * name-value(s) pair it always handes over (delegates) the task to another pull
+ * parser which knows how to deal with it The common types of name value pairs
+ * we'll come across are
+ * <ul>
+ * <li> String name/QName name - String value
+ * <li> String name/QName name - String[] value
+ * <li> QName name/String name - XMLStreamReader value
+ * <li> QName name/String name - XMLStreamable value
+ * <li> QName name/String name - Java bean
+ * <li> QName name/String name - Datahandler
+ *
+ * </ul>
+ * <p/> As for the attributes, these are the possible combinations in the array
+ * <ul>
+ * <li> String name/QName name - String value
+ * </ul>
+ * Note that certain array methods have been deliberately removed to avoid
+ * complications. The generated code will take the trouble to lay the elements
+ * of the array in the correct order <p/> <p/> Hence there will be a parser impl
+ * that knows how to handle these types, and this parent parser will always
+ * delegate these tasks to the child pullparasers in effect this is one huge
+ * state machine that has only a few states and delegates things down to the
+ * child parsers whenever possible <p/>
+ *
+ * @version $Rev$ $Date$
+ */
+public class XMLFragmentStreamReaderImpl implements XMLFragmentStreamReader {
+
+ private static final int DELEGATED_STATE = 2;
+ private static final int END_ELEMENT_STATE = 1;
+ // states for this pullparser - it can only have four states
+ private static final int START_ELEMENT_STATE = 0;
+ private static final int TEXT_STATE = 3;
+
+ protected NamedProperty[] attributes;
+
+ // reference to the child reader
+ protected XMLFragmentStreamReader childReader;
+ // current property index
+ // initialized at zero
+ protected int index;
+ protected Map<String, String> declaredNamespaceMap = new HashMap<String, String>();
+ protected QName elementQName;
+
+ // we always create a new namespace context
+ protected DelegatingNamespaceContext namespaceContext = new DelegatingNamespaceContext();
+
+ protected NamedProperty[] elements;
+
+ // integer field that keeps the state of this
+ // parser.
+ protected int state = START_ELEMENT_STATE;
+
+ /*
+ * we need to pass in a namespace context since when delegated, we've no
+ * idea of the current namespace context. So it needs to be passed on here!
+ */
+ public XMLFragmentStreamReaderImpl(QName elementQName, NamedProperty[] elements, NamedProperty[] attributes) {
+ // validate the lengths, since both the arrays are supposed
+ // to have
+ this.elements = elements == null ? new NamedProperty[0] : elements;
+ this.elementQName = elementQName;
+ this.attributes = attributes == null ? new NamedProperty[0] : attributes;
+ }
+
+ protected XMLFragmentStreamReaderImpl(QName elementQName) {
+ this.elementQName = elementQName;
+ }
+
+ /**
+ * add the namespace context
+ */
+
+ public void setParentNamespaceContext(NamespaceContext nsContext) {
+ // register the namespace context passed in to this
+ this.namespaceContext.setParentNsContext(nsContext);
+
+ }
+
+ protected NamedProperty[] getElements() {
+ return elements;
+ }
+
+ protected NamedProperty[] getAttributes() {
+ return attributes;
+ }
+
+ protected QName[] getNamespaces() {
+ return new QName[0];
+ }
+
+ /**
+ * @param prefix
+ * @param uri
+ */
+ protected void addToNsMap(String prefix, String uri) {
+ if (!uri.equals(namespaceContext.getNamespaceURI(prefix))) {
+ namespaceContext.pushNamespace(prefix, uri);
+ declaredNamespaceMap.put(prefix, uri);
+ }
+ }
+
+ public void close() throws XMLStreamException {
+ // do nothing here - we have no resources to free
+ }
+
+ public int getAttributeCount() {
+ return (state == DELEGATED_STATE) ? childReader.getAttributeCount() : (state == START_ELEMENT_STATE
+ ? getAttributes().length : 0);
+ }
+
+ public String getAttributeLocalName(int i) {
+ if (state == DELEGATED_STATE) {
+ return childReader.getAttributeLocalName(i);
+ } else if (state == START_ELEMENT_STATE) {
+ QName name = getAttributeName(i);
+ if (name == null) {
+ return null;
+ } else {
+ return name.getLocalPart();
+ }
+ } else {
+ throw new IllegalStateException();
+ }
+ }
+
+ /**
+ * @param i
+ */
+ public QName getAttributeName(int i) {
+ if (state == DELEGATED_STATE) {
+ return childReader.getAttributeName(i);
+ } else if (state == START_ELEMENT_STATE) {
+ if ((i >= (getAttributes().length)) || i < 0) { // out of range
+ return null;
+ } else {
+ // get the attribute pointer
+ QName attribPointer = getAttributes()[i].getKey();
+ // case one - attrib name is null
+ // this should be the pointer to the OMAttribute then
+ if (attribPointer == null) {
+ throw new UnsupportedOperationException();
+ } else if (attribPointer instanceof QName) {
+ return (QName)attribPointer;
+ } else {
+ return null;
+ }
+ }
+ } else {
+ throw new IllegalStateException(); // as per the api contract
+ }
+
+ }
+
+ public String getAttributeNamespace(int i) {
+ if (state == DELEGATED_STATE) {
+ return childReader.getAttributeNamespace(i);
+ } else if (state == START_ELEMENT_STATE) {
+ QName name = getAttributeName(i);
+ if (name == null) {
+ return null;
+ } else {
+ return name.getNamespaceURI();
+ }
+ } else {
+ throw new IllegalStateException();
+ }
+ }
+
+ public String getAttributePrefix(int i) {
+ if (state == DELEGATED_STATE) {
+ return childReader.getAttributePrefix(i);
+ } else if (state == START_ELEMENT_STATE) {
+ QName name = getAttributeName(i);
+ if (name == null) {
+ return null;
+ } else {
+ return name.getPrefix();
+ }
+ } else {
+ throw new IllegalStateException();
+ }
+ }
+
+ public String getAttributeType(int i) {
+ return null; // not supported
+ }
+
+ public String getAttributeValue(int i) {
+ if (state == DELEGATED_STATE) {
+ return childReader.getAttributeValue(i);
+ } else if (state == START_ELEMENT_STATE) {
+ if ((i >= (getAttributes().length)) || i < 0) { // out of range
+ return null;
+ } else {
+ // get the attribute pointer
+ QName attribPointer = getAttributes()[i].getKey();
+ Object omAttribObj = getAttributes()[i].getValue();
+ // case one - attrib name is null
+ // this should be the pointer to the OMAttribute then
+ if (attribPointer == null) {
+ throw new UnsupportedOperationException();
+ } else if (attribPointer instanceof QName) {
+ return (String)omAttribObj;
+ } else {
+ return null;
+ }
+ }
+ } else {
+ throw new IllegalStateException();
+ }
+
+ }
+
+ public String getAttributeValue(String nsUri, String localName) {
+
+ int attribCount = getAttributeCount();
+ String returnValue = null;
+ QName attribQualifiedName;
+ for (int i = 0; i < attribCount; i++) {
+ attribQualifiedName = getAttributeName(i);
+ if (nsUri == null) {
+ if (localName.equals(attribQualifiedName.getLocalPart())) {
+ returnValue = getAttributeValue(i);
+ break;
+ }
+ } else {
+ if (localName.equals(attribQualifiedName.getLocalPart()) && nsUri.equals(attribQualifiedName
+ .getNamespaceURI())) {
+ returnValue = getAttributeValue(i);
+ break;
+ }
+ }
+
+ }
+
+ return returnValue;
+ }
+
+ public String getCharacterEncodingScheme() {
+ return null; // todo - should we return something for this ?
+ }
+
+ /**
+ * todo implement the right contract for this
+ *
+ * @throws XMLStreamException
+ */
+ public String getElementText() throws XMLStreamException {
+ if (state == DELEGATED_STATE) {
+ return childReader.getElementText();
+ } else {
+ return null;
+ }
+
+ }
+
+ // /////////////////////////////////////////////////////////////////////////
+ // / attribute handling
+ // /////////////////////////////////////////////////////////////////////////
+
+ public String getEncoding() {
+ if (state == DELEGATED_STATE) {
+ return childReader.getEncoding();
+ } else {
+ // we've no idea what the encoding is going to be in this case
+ // perhaps we ought to return some constant here, which the user
+ // might
+ // have access to change!
+ return null;
+ }
+ }
+
+ public int getEventType() {
+ if (state == START_ELEMENT_STATE) {
+ return START_ELEMENT;
+ } else if (state == END_ELEMENT_STATE) {
+ return END_ELEMENT;
+ } else { // this is the delegated state
+ return childReader.getEventType();
+ }
+
+ }
+
+ public String getLocalName() {
+ if (state == DELEGATED_STATE) {
+ return childReader.getLocalName();
+ } else if (state != TEXT_STATE) {
+ return elementQName.getLocalPart();
+ } else {
+ throw new IllegalStateException();
+ }
+ }
+
+ /**
+ */
+ public Location getLocation() {
+ // return a default location
+ return new Location() {
+ public int getCharacterOffset() {
+ return 0;
+ }
+
+ public int getColumnNumber() {
+ return 0;
+ }
+
+ public int getLineNumber() {
+ return 0;
+ }
+
+ public String getPublicId() {
+ return null;
+ }
+
+ public String getSystemId() {
+ return null;
+ }
+ };
+ }
+
+ public QName getName() {
+ if (state == DELEGATED_STATE) {
+ return childReader.getName();
+ } else if (state != TEXT_STATE) {
+ return elementQName;
+ } else {
+ throw new IllegalStateException();
+ }
+
+ }
+
+ public NamespaceContext getNamespaceContext() {
+ if (state == DELEGATED_STATE) {
+ return childReader.getNamespaceContext();
+ } else {
+ return namespaceContext;
+ }
+
+ }
+
+ public int getNamespaceCount() {
+ if (state == DELEGATED_STATE) {
+ return childReader.getNamespaceCount();
+ } else {
+ return declaredNamespaceMap.size();
+ }
+ }
+
+ /**
+ * @param i
+ */
+ public String getNamespacePrefix(int i) {
+ if (state == DELEGATED_STATE) {
+ return childReader.getNamespacePrefix(i);
+ } else if (state != TEXT_STATE) {
+ // order the prefixes
+ String[] prefixes = makePrefixArray();
+ if ((i >= prefixes.length) || (i < 0)) {
+ return null;
+ } else {
+ return prefixes[i];
+ }
+
+ } else {
+ throw new IllegalStateException();
+ }
+
+ }
+
+ public String getNamespaceURI() {
+ if (state == DELEGATED_STATE) {
+ return childReader.getNamespaceURI();
+ } else if (state == TEXT_STATE) {
+ return null;
+ } else {
+ return elementQName.getNamespaceURI();
+ }
+ }
+
+ // /////////////////////////////////////////////////////////////////////////
+ // //////////// end of attribute handling
+ // /////////////////////////////////////////////////////////////////////////
+
+ // //////////////////////////////////////////////////////////////////////////
+ // //////////// namespace handling
+ // //////////////////////////////////////////////////////////////////////////
+
+ public String getNamespaceURI(int i) {
+ if (state == DELEGATED_STATE) {
+ return childReader.getNamespaceURI(i);
+ } else if (state != TEXT_STATE) {
+ String namespacePrefix = getNamespacePrefix(i);
+ return namespacePrefix == null ? null : (String)declaredNamespaceMap.get(namespacePrefix);
+ } else {
+ throw new IllegalStateException();
+ }
+
+ }
+
+ public String getNamespaceURI(String prefix) {
+ return namespaceContext.getNamespaceURI(prefix);
+ }
+
+ public String getPIData() {
+ throw new UnsupportedOperationException("Yet to be implemented !!");
+ }
+
+ public String getPITarget() {
+ throw new UnsupportedOperationException("Yet to be implemented !!");
+ }
+
+ public String getPrefix() {
+ if (state == DELEGATED_STATE) {
+ return childReader.getPrefix();
+ } else if (state == TEXT_STATE) {
+ return null;
+ } else {
+ String prefix = elementQName.getPrefix();
+ return "".equals(prefix) ? null : prefix;
+ }
+ }
+
+ // /////////////////////////////////////////////////////////////////////////
+ // /////// end of namespace handling
+ // /////////////////////////////////////////////////////////////////////////
+
+ /**
+ * @param key
+ * @throws IllegalArgumentException
+ */
+ public Object getProperty(String key) throws IllegalArgumentException {
+ if (state == START_ELEMENT_STATE || state == END_ELEMENT_STATE) {
+ return null;
+ } else if (state == TEXT_STATE) {
+ return null;
+ } else if (state == DELEGATED_STATE) {
+ return childReader.getProperty(key);
+ } else {
+ return null;
+ }
+
+ }
+
+ public String getText() {
+ if (state == DELEGATED_STATE) {
+ return childReader.getText();
+ } else if (state == TEXT_STATE) {
+ return (String)getElements()[index - 1].getValue();
+ } else {
+ throw new IllegalStateException();
+ }
+ }
+
+ public char[] getTextCharacters() {
+ if (state == DELEGATED_STATE) {
+ return childReader.getTextCharacters();
+ } else if (state == TEXT_STATE) {
+ return getElements()[index - 1].getValue() == null ? new char[0] : ((String)getElements()[index - 1]
+ .getValue()).toCharArray();
+ } else {
+ throw new IllegalStateException();
+ }
+ }
+
+ private int copy(int sourceStart, char[] target, int targetStart, int length) {
+ char[] source = getTextCharacters();
+ if (sourceStart > source.length) {
+ throw new IndexOutOfBoundsException("source start > source length");
+ }
+ int sourceLen = source.length - sourceStart;
+ if (length > sourceLen) {
+ length = sourceLen;
+ }
+ System.arraycopy(source, sourceStart, target, targetStart, length);
+ return sourceLen;
+ }
+
+ public int getTextCharacters(int i, char[] chars, int i1, int i2) throws XMLStreamException {
+ if (state == DELEGATED_STATE) {
+ return childReader.getTextCharacters(i, chars, i1, i2);
+ } else if (state == TEXT_STATE) {
+ return copy(i, chars, i1, i2);
+ } else {
+ throw new IllegalStateException();
+ }
+ }
+
+ public int getTextLength() {
+ if (state == DELEGATED_STATE) {
+ return childReader.getTextLength();
+ } else if (state == TEXT_STATE) {
+ return getTextCharacters().length;
+ } else {
+ throw new IllegalStateException();
+ }
+ }
+
+ public int getTextStart() {
+ if (state == DELEGATED_STATE) {
+ return childReader.getTextStart();
+ } else if (state == TEXT_STATE) {
+ return 0; // assume text always starts at 0
+ } else {
+ throw new IllegalStateException();
+ }
+ }
+
+ public String getVersion() {
+ return null;
+ }
+
+ public boolean hasName() {
+ // since this parser always has a name, the hasname
+ // has to return true if we are still navigating this element
+ // if not we should ask the child reader for it.
+ if (state == DELEGATED_STATE) {
+ return childReader.hasName();
+ } else {
+ return state != TEXT_STATE;
+ }
+ }
+
+ /**
+ * @throws XMLStreamException
+ */
+ public boolean hasNext() throws XMLStreamException {
+ if (state == DELEGATED_STATE) {
+ if (childReader.isDone()) {
+ // the child reader is done. We shouldn't be getting the
+ // hasnext result from the child pullparser then
+ return true;
+ } else {
+ return childReader.hasNext();
+ }
+ } else {
+ return state == START_ELEMENT_STATE || state == TEXT_STATE;
+
+ }
+ }
+
+ /**
+ * check the validity of this implementation
+ */
+ public boolean hasText() {
+ if (state == DELEGATED_STATE) {
+ return childReader.hasText();
+ } else {
+ return state == TEXT_STATE;
+ }
+
+ }
+
+ /**
+ * we need to split out the calling to the populate namespaces seperately
+ * since this needs to be done *after* setting the parent namespace context.
+ * We cannot assume it will happen at construction!
+ */
+ public void init() {
+ // here we have an extra issue to attend to. we need to look at the
+ // prefixes and uris (the combination) and populate a hashmap of
+ // namespaces. The hashmap of namespaces will be used to serve the
+ // namespace context
+
+ populateNamespaceContext();
+ }
+
+ public boolean isAttributeSpecified(int i) {
+ return false; // not supported
+ }
+
+ public boolean isCharacters() {
+ if (state == START_ELEMENT_STATE || state == END_ELEMENT_STATE) {
+ return false;
+ }
+ return childReader.isCharacters();
+ }
+
+ /**
+ * are we done ?
+ */
+ public boolean isDone() {
+ return state == END_ELEMENT_STATE;
+ }
+
+ public boolean isEndElement() {
+ if (state == START_ELEMENT_STATE) {
+ return false;
+ } else if (state == END_ELEMENT_STATE) {
+ return true;
+ }
+ return childReader.isEndElement();
+ }
+
+ public boolean isStandalone() {
+ return true;
+ }
+
+ public boolean isStartElement() {
+ if (state == START_ELEMENT_STATE) {
+ return true;
+ } else if (state == END_ELEMENT_STATE) {
+ return false;
+ }
+ return childReader.isStartElement();
+ }
+
+ public boolean isWhiteSpace() {
+ if (state == START_ELEMENT_STATE || state == END_ELEMENT_STATE) {
+ return false;
+ }
+ return childReader.isWhiteSpace();
+ }
+
+ /**
+ * Get the prefix list from the hastable and take that into an array
+ */
+ private String[] makePrefixArray() {
+ String[] prefixes = (String[])declaredNamespaceMap.keySet().toArray(new String[declaredNamespaceMap.size()]);
+ Arrays.sort(prefixes);
+ return prefixes;
+ }
+
+ /**
+ * By far this should be the most important method in this class this method
+ * changes the state of the parser
+ */
+ public int next() throws XMLStreamException {
+ int returnEvent = -1; // invalid state is the default state
+ switch (state) {
+ case START_ELEMENT_STATE:
+ // current element is start element. We should be looking at the
+ // property list and making a pullparser for the property value
+ if (getElements() == null || getElements().length == 0) {
+ // no properties - move to the end element state
+ // straightaway
+ state = END_ELEMENT_STATE;
+ returnEvent = END_ELEMENT;
+ } else {
+ // there are properties. now we should delegate this task to
+ // a
+ // child reader depending on the property type
+ returnEvent = processProperties();
+
+ }
+ break;
+ case END_ELEMENT_STATE:
+ // we've reached the end element already. If the user tries to
+ // push
+ // further ahead then it is an exception
+ throw new XMLStreamException("Trying to go beyond the end of the pullparser");
+
+ case DELEGATED_STATE:
+ if (childReader.isDone()) {
+ // we've reached the end!
+ if (index > (getElements().length - 1)) {
+ state = END_ELEMENT_STATE;
+ returnEvent = END_ELEMENT;
+ } else {
+ returnEvent = processProperties();
+ }
+ } else {
+ returnEvent = childReader.next();
+ }
+ break;
+
+ case TEXT_STATE:
+ // if there are any more event we should be delegating to
+ // processProperties. if not we just return an end element
+ if (index > (getElements().length - 1)) {
+ state = END_ELEMENT_STATE;
+ returnEvent = END_ELEMENT;
+ } else {
+ returnEvent = processProperties();
+ }
+ break;
+ }
+ return returnEvent;
+ }
+
+ // /////////////////////////////////////////////////////////////////////////
+ // / Other utility methods
+ // ////////////////////////////////////////////////////////////////////////
+
+ /**
+ * todo implement this
+ *
+ * @throws XMLStreamException
+ */
+ public int nextTag() throws XMLStreamException {
+ return 0;
+ }
+
+ /**
+ * Populates a namespace context
+ */
+ private void populateNamespaceContext() {
+
+ // first add the current element namespace to the namespace context
+ // declare it if not found
+ addToNsMap(elementQName.getPrefix(), elementQName.getNamespaceURI());
+
+ for (QName n : getNamespaces()) {
+ addToNsMap(n.getPrefix(), n.getNamespaceURI());
+ }
+
+ // traverse through the attributes and populate the namespace context
+ // the attrib list can be of many combinations
+ // the valid combinations are
+ // String - String
+ // QName - QName
+ // null - OMAttribute
+
+ for (int i = 0; i < getAttributes().length; i++) { // jump in two
+ QName attrQName = getAttributes()[i].getKey();
+ if (!"".equals(attrQName.getNamespaceURI())) {
+ addToNsMap(attrQName.getPrefix(), attrQName.getNamespaceURI());
+ }
+ }
+ }
+
+ /**
+ * A convenient method to reuse the properties
+ *
+ * @return event to be thrown
+ * @throws XMLStreamException
+ */
+ private int processProperties() throws XMLStreamException {
+ // move to the next property depending on the current property
+ // index
+ QName propertyQName = getElements()[index].getKey();
+ boolean textFound = false;
+ if (propertyQName == null) {
+ throw new XMLStreamException("property key cannot be null!");
+ } else if (ELEMENT_TEXT.equals(propertyQName.getLocalPart())) {
+ // propPointer being a String has a special case
+ // that is it can be a the special constant ELEMENT_TEXT that
+ // says this text event
+ textFound = true;
+ }
+
+ // ok! we got the key. Now look at the value
+ Object propertyValue = getElements()[index].getValue();
+ // cater for the special case now
+ if (textFound) {
+ // no delegation here - make the parser null and immediately
+ // return with the event characters
+ childReader = null;
+ state = TEXT_STATE;
+ ++index;
+ return CHARACTERS;
+ } else if (propertyValue == null) {
+ // if the value is null we delegate the work to a nullable
+ // parser
+ childReader = new NilElementStreamReader(propertyQName);
+ childReader.setParentNamespaceContext(this.namespaceContext);
+ childReader.init();
+ } else if (propertyValue instanceof String) {
+ // strings are handled by the NameValuePairStreamReader
+ childReader = new NameValuePairStreamReader(propertyQName, (String)propertyValue);
+ childReader.setParentNamespaceContext(this.namespaceContext);
+ childReader.init();
+ } else if (propertyValue instanceof String[]) {
+ // string[] are handled by the NameValueArrayStreamReader
+ // if the array is empty - skip it
+ if (((String[])propertyValue).length == 0) {
+ // advance the index
+ ++index;
+ return processProperties();
+ } else {
+ childReader = new NameValueArrayStreamReader(propertyQName, (String[])propertyValue);
+ childReader.setParentNamespaceContext(this.namespaceContext);
+ childReader.init();
+ }
+
+ } else if (propertyValue instanceof XMLStreamable) {
+ // ADBbean has it's own method to get a reader
+ XMLStreamReader reader = ((XMLStreamable)propertyValue).getXMLStreamReader(propertyQName);
+ // we know for sure that this is an ADB XMLStreamreader.
+ // However we need to make sure that it is compatible
+ if (reader instanceof XMLFragmentStreamReader) {
+ childReader = (XMLFragmentStreamReader)reader;
+ childReader.setParentNamespaceContext(this.namespaceContext);
+ childReader.init();
+ } else {
+ // wrap it to make compatible
+ childReader = new WrappingXMLStreamReader(reader);
+ }
+ } else if (propertyValue instanceof XMLStreamReader) {
+ XMLStreamReader reader = (XMLStreamReader)propertyValue;
+ if (reader instanceof XMLFragmentStreamReader) {
+ childReader = (XMLFragmentStreamReader)reader;
+ childReader.setParentNamespaceContext(this.namespaceContext);
+ childReader.init();
+ } else {
+ // wrap it to make compatible
+ childReader = new WrappingXMLStreamReader(reader);
+ }
+
+ } else {
+ // all special possiblilities has been tried! Let's treat
+ // the thing as a bean and try generating events from it
+ childReader = new WrappingXMLStreamReader(BeanUtil.getXMLStreamReader(propertyValue, propertyQName));
+ // we cannot register the namespace context here
+ }
+
+ // set the state here
+ state = DELEGATED_STATE;
+ // we are done with the delegation
+ // increment the property index
+ ++index;
+ return childReader.getEventType();
+ }
+
+ public void require(int i, String string, String string1) throws XMLStreamException {
+ throw new UnsupportedOperationException();
+ }
+
+ public boolean standaloneSet() {
+ return true;
+ }
+
+}
Propchange: incubator/tuscany/branches/sca-java-integration/sca/kernel/core/src/main/java/org/apache/tuscany/core/databinding/xml/XMLFragmentStreamReaderImpl.java
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Added: incubator/tuscany/branches/sca-java-integration/sca/kernel/core/src/main/java/org/apache/tuscany/core/databinding/xml/XMLStreamSerializer.java
URL: http://svn.apache.org/viewvc/incubator/tuscany/branches/sca-java-integration/sca/kernel/core/src/main/java/org/apache/tuscany/core/databinding/xml/XMLStreamSerializer.java?view=auto&rev=513629
==============================================================================
--- incubator/tuscany/branches/sca-java-integration/sca/kernel/core/src/main/java/org/apache/tuscany/core/databinding/xml/XMLStreamSerializer.java (added)
+++ incubator/tuscany/branches/sca-java-integration/sca/kernel/core/src/main/java/org/apache/tuscany/core/databinding/xml/XMLStreamSerializer.java Thu Mar 1 22:32:26 2007
@@ -0,0 +1,281 @@
+package org.apache.tuscany.core.databinding.xml;
+
+import javax.xml.namespace.NamespaceContext;
+import javax.xml.stream.XMLStreamConstants;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamReader;
+import javax.xml.stream.XMLStreamWriter;
+
+/**
+ * The XMLStreamSerializer pulls events from the XMLStreamReader and dumps into the XMLStreamWriter
+ */
+public class XMLStreamSerializer implements XMLStreamConstants {
+ public static final String NAMESPACE_PREFIX = "ns";
+ private static int namespaceSuffix;
+
+ /*
+ * The behavior of the serializer is such that it returns when it
+ * encounters the starting element for the second time. The depth
+ * variable tracks the depth of the serilizer and tells it when to
+ * return. Note that it is assumed that this serialization starts on an
+ * Element.
+ */
+
+ /**
+ * Field depth
+ */
+ private int depth;
+
+ /**
+ * Generates a unique namespace prefix that is not in the scope of the NamespaceContext
+ *
+ * @param nsCtxt
+ * @return string
+ */
+ private String generateUniquePrefix(NamespaceContext nsCtxt) {
+ String prefix = NAMESPACE_PREFIX + namespaceSuffix++;
+ // null should be returned if the prefix is not bound!
+ while (nsCtxt.getNamespaceURI(prefix) != null) {
+ prefix = NAMESPACE_PREFIX + namespaceSuffix++;
+ }
+
+ return prefix;
+ }
+
+ /**
+ * Method serialize.
+ *
+ * @param node
+ * @param writer
+ * @throws XMLStreamException
+ */
+ public void serialize(XMLStreamReader node, XMLStreamWriter writer) throws XMLStreamException {
+ serializeNode(node, writer);
+ }
+
+ /**
+ * @param reader
+ * @param writer
+ * @throws XMLStreamException
+ */
+ protected void serializeAttributes(XMLStreamReader reader, XMLStreamWriter writer)
+ throws XMLStreamException {
+ int count = reader.getAttributeCount();
+ String prefix;
+ String namespaceName;
+ String writerPrefix;
+ for (int i = 0; i < count; i++) {
+ prefix = reader.getAttributePrefix(i);
+ namespaceName = reader.getAttributeNamespace(i);
+ /*
+ * Due to parser implementations returning null as the namespace
+ * URI (for the empty namespace) we need to make sure that we
+ * deal with a namespace name that is not null. The best way to
+ * work around this issue is to set the namespace uri to "" if
+ * it is null
+ */
+ if (namespaceName == null) {
+ namespaceName = "";
+ }
+
+ writerPrefix = writer.getNamespaceContext().getPrefix(namespaceName);
+
+ if (!"".equals(namespaceName)) {
+ // prefix has already being declared but this particular
+ // attrib has a
+ // no prefix attached. So use the prefix provided by the
+ // writer
+ if (writerPrefix != null && (prefix == null || prefix.equals(""))) {
+ writer.writeAttribute(writerPrefix,
+ namespaceName,
+ reader.getAttributeLocalName(i),
+ reader.getAttributeValue(i));
+
+ // writer prefix is available but different from the
+ // current
+ // prefix of the attrib. We should be decalring the new
+ // prefix
+ // as a namespace declaration
+ } else if (prefix != null && !"".equals(prefix) && !prefix.equals(writerPrefix)) {
+ writer.writeNamespace(prefix, namespaceName);
+ writer.writeAttribute(prefix, namespaceName, reader.getAttributeLocalName(i), reader
+ .getAttributeValue(i));
+
+ // prefix is null (or empty), but the namespace name is
+ // valid! it has not
+ // being written previously also. So we need to generate
+ // a prefix
+ // here
+ } else if (prefix == null || prefix.equals("")) {
+ prefix = generateUniquePrefix(writer.getNamespaceContext());
+ writer.writeNamespace(prefix, namespaceName);
+ writer.writeAttribute(prefix, namespaceName, reader.getAttributeLocalName(i), reader
+ .getAttributeValue(i));
+ } else {
+ writer.writeAttribute(prefix, namespaceName, reader.getAttributeLocalName(i), reader
+ .getAttributeValue(i));
+ }
+ } else {
+ // empty namespace is equal to no namespace!
+ writer.writeAttribute(reader.getAttributeLocalName(i), reader.getAttributeValue(i));
+ }
+
+ }
+ }
+
+ /**
+ * Method serializeCData.
+ *
+ * @param reader
+ * @param writer
+ * @throws XMLStreamException
+ */
+ protected void serializeCData(XMLStreamReader reader, XMLStreamWriter writer)
+ throws XMLStreamException {
+ writer.writeCData(reader.getText());
+ }
+
+ /**
+ * Method serializeComment.
+ *
+ * @param reader
+ * @param writer
+ * @throws XMLStreamException
+ */
+ protected void serializeComment(XMLStreamReader reader, XMLStreamWriter writer)
+ throws XMLStreamException {
+ writer.writeComment(reader.getText());
+ }
+
+ /**
+ * @param reader
+ * @param writer
+ * @throws XMLStreamException
+ */
+ protected void serializeElement(XMLStreamReader reader, XMLStreamWriter writer)
+ throws XMLStreamException {
+ String prefix = reader.getPrefix();
+ String nameSpaceName = reader.getNamespaceURI();
+ if (nameSpaceName != null) {
+ String writerPrefix = writer.getPrefix(nameSpaceName);
+ if (writerPrefix != null) {
+ writer.writeStartElement(nameSpaceName, reader.getLocalName());
+ } else {
+ if (prefix != null) {
+ writer.writeStartElement(prefix, reader.getLocalName(), nameSpaceName);
+ writer.writeNamespace(prefix, nameSpaceName);
+ writer.setPrefix(prefix, nameSpaceName);
+ } else {
+ writer.writeStartElement(nameSpaceName, reader.getLocalName());
+ writer.writeDefaultNamespace(nameSpaceName);
+ writer.setDefaultNamespace(nameSpaceName);
+ }
+ }
+ } else {
+ writer.writeStartElement(reader.getLocalName());
+ }
+
+ // add the namespaces
+ int count = reader.getNamespaceCount();
+ String namespacePrefix;
+ for (int i = 0; i < count; i++) {
+ namespacePrefix = reader.getNamespacePrefix(i);
+ if (namespacePrefix != null && namespacePrefix.length() == 0) {
+ continue;
+ }
+
+ serializeNamespace(namespacePrefix, reader.getNamespaceURI(i), writer);
+ }
+
+ // add attributes
+ serializeAttributes(reader, writer);
+
+ }
+
+ /**
+ * Method serializeEndElement.
+ *
+ * @param writer
+ * @throws XMLStreamException
+ */
+ protected void serializeEndElement(XMLStreamWriter writer) throws XMLStreamException {
+ writer.writeEndElement();
+ }
+
+ /**
+ * Method serializeNamespace.
+ *
+ * @param prefix
+ * @param uri
+ * @param writer
+ * @throws XMLStreamException
+ */
+ private void serializeNamespace(String prefix, String uri, XMLStreamWriter writer)
+ throws XMLStreamException {
+ String prefix1 = writer.getPrefix(uri);
+ if (prefix1 == null) {
+ writer.writeNamespace(prefix, uri);
+ writer.setPrefix(prefix, uri);
+ }
+ }
+
+ /**
+ * Method serializeNode.
+ *
+ * @param reader
+ * @param writer
+ * @throws XMLStreamException
+ */
+ protected void serializeNode(XMLStreamReader reader, XMLStreamWriter writer)
+ throws XMLStreamException {
+ // TODO We get the StAXWriter at this point and uses it hereafter
+ // assuming that this is the only entry point
+ // to this class.
+ // If there can be other classes calling methodes of this we might
+ // need to change methode signatures to
+ // OMOutputer
+ while (reader.hasNext()) {
+ int event = reader.next();
+ if (event == START_ELEMENT) {
+ serializeElement(reader, writer);
+ depth++;
+ } else if (event == ATTRIBUTE) {
+ serializeAttributes(reader, writer);
+ } else if (event == CHARACTERS) {
+ serializeText(reader, writer);
+ } else if (event == COMMENT) {
+ serializeComment(reader, writer);
+ } else if (event == CDATA) {
+ serializeCData(reader, writer);
+ } else if (event == END_ELEMENT) {
+ serializeEndElement(writer);
+ depth--;
+ } else if (event == START_DOCUMENT) {
+ depth++; // if a start document is found then increment
+ // the depth
+ } else if (event == END_DOCUMENT) {
+ if (depth != 0) {
+ depth--; // for the end document - reduce the depth
+ }
+ try {
+ serializeEndElement(writer);
+ } catch (Exception e) {
+ // TODO: log exceptions
+ }
+ }
+ if (depth == 0) {
+ break;
+ }
+ }
+ }
+
+ /**
+ * @param reader
+ * @param writer
+ * @throws XMLStreamException
+ */
+ protected void serializeText(XMLStreamReader reader, XMLStreamWriter writer)
+ throws XMLStreamException {
+ writer.writeCharacters(reader.getText());
+ }
+}
\ No newline at end of file
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Added: incubator/tuscany/branches/sca-java-integration/sca/kernel/core/src/main/java/org/apache/tuscany/core/databinding/xml/XMLStreamable.java
URL: http://svn.apache.org/viewvc/incubator/tuscany/branches/sca-java-integration/sca/kernel/core/src/main/java/org/apache/tuscany/core/databinding/xml/XMLStreamable.java?view=auto&rev=513629
==============================================================================
--- incubator/tuscany/branches/sca-java-integration/sca/kernel/core/src/main/java/org/apache/tuscany/core/databinding/xml/XMLStreamable.java (added)
+++ incubator/tuscany/branches/sca-java-integration/sca/kernel/core/src/main/java/org/apache/tuscany/core/databinding/xml/XMLStreamable.java Thu Mar 1 22:32:26 2007
@@ -0,0 +1,37 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.core.databinding.xml;
+
+import javax.xml.namespace.QName;
+import javax.xml.stream.XMLStreamReader;
+
+/**
+ * An interface represents data that can be read using StAX streaming
+ *
+ * @version $Rev$ $Date$
+ */
+public interface XMLStreamable {
+ /**
+ * Get the XMLStreamReader for StAX processing
+ *
+ * @param rootElementName the name of the element to be generated
+ * @return Returns a pull parser.
+ */
+ XMLStreamReader getXMLStreamReader(QName rootElementName);
+}
Propchange: incubator/tuscany/branches/sca-java-integration/sca/kernel/core/src/main/java/org/apache/tuscany/core/databinding/xml/XMLStreamable.java
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svn:keywords = Rev Date
Modified: incubator/tuscany/branches/sca-java-integration/sca/kernel/core/src/test/java/org/apache/tuscany/core/databinding/xml/DOM2StAXTestCase.java
URL: http://svn.apache.org/viewvc/incubator/tuscany/branches/sca-java-integration/sca/kernel/core/src/test/java/org/apache/tuscany/core/databinding/xml/DOM2StAXTestCase.java?view=diff&rev=513629&r1=513628&r2=513629
==============================================================================
--- incubator/tuscany/branches/sca-java-integration/sca/kernel/core/src/test/java/org/apache/tuscany/core/databinding/xml/DOM2StAXTestCase.java (original)
+++ incubator/tuscany/branches/sca-java-integration/sca/kernel/core/src/test/java/org/apache/tuscany/core/databinding/xml/DOM2StAXTestCase.java Thu Mar 1 22:32:26 2007
@@ -56,6 +56,8 @@
+ " </items>"
+ "</ipo:purchaseOrder>";
+ private static final String CRAZY_XML = "<p:e1 xmlns:p=\"http://p1\">" + "<p:e2 xmlns:p=\"http://p2\"/></p:e1>";
+
/**
* @see junit.framework.TestCase#setUp()
*/
@@ -70,7 +72,17 @@
XMLStreamReader reader = t2.transform(node, null);
XMLStreamReader2String t3 = new XMLStreamReader2String();
String xml = t3.transform(reader, null);
- Assert.assertTrue(xml != null && xml.indexOf("<shipDate>1999-12-05</shipDate>") != -1);
+ assertTrue(xml != null && xml.indexOf("<shipDate>1999-12-05</shipDate>") != -1);
}
+ public void testTransformation2() {
+ String2Node t1 = new String2Node();
+ Node node = t1.transform(CRAZY_XML, null);
+ Node2XMLStreamReader t2 = new Node2XMLStreamReader();
+ XMLStreamReader reader = t2.transform(node, null);
+ XMLStreamReader2String t3 = new XMLStreamReader2String();
+ String xml = t3.transform(reader, null);
+ System.out.println(xml);
+ assertTrue(xml.contains("<p:e2 xmlns:p=\"http://p2\""));
+ }
}
Added: incubator/tuscany/branches/sca-java-integration/sca/kernel/core/src/test/java/org/apache/tuscany/core/databinding/xml/JavaBean2XMLStreamReaderTestCase.java
URL: http://svn.apache.org/viewvc/incubator/tuscany/branches/sca-java-integration/sca/kernel/core/src/test/java/org/apache/tuscany/core/databinding/xml/JavaBean2XMLStreamReaderTestCase.java?view=auto&rev=513629
==============================================================================
--- incubator/tuscany/branches/sca-java-integration/sca/kernel/core/src/test/java/org/apache/tuscany/core/databinding/xml/JavaBean2XMLStreamReaderTestCase.java (added)
+++ incubator/tuscany/branches/sca-java-integration/sca/kernel/core/src/test/java/org/apache/tuscany/core/databinding/xml/JavaBean2XMLStreamReaderTestCase.java Thu Mar 1 22:32:26 2007
@@ -0,0 +1,134 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.tuscany.core.databinding.xml;
+
+import javax.xml.stream.XMLStreamReader;
+
+import junit.framework.TestCase;
+
+import org.apache.tuscany.core.databinding.javabeans.JavaBean2XMLStreamReader;
+
+public class JavaBean2XMLStreamReaderTestCase extends TestCase {
+ /**
+ * @see junit.framework.TestCase#setUp()
+ */
+ protected void setUp() throws Exception {
+ super.setUp();
+ }
+
+ public void testTransformation() {
+ JavaBean2XMLStreamReader t2 = new JavaBean2XMLStreamReader();
+ MyBean bean = new MyBean();
+ bean.str = "ABC";
+ bean.i = 1;
+ bean.arr = new long[] {1, 2, 3};
+ bean.bean = new AnotherBean();
+ bean.bean.setName("Name");
+ XMLStreamReader reader = t2.transform(bean, null);
+ XMLStreamReader2String t3 = new XMLStreamReader2String();
+ String xml = t3.transform(reader, null);
+ assertEquals("<JavaBean2XMLStreamReaderTestCase$MyBean>"
+ + "<arr>1</arr><arr>2</arr><arr>3</arr><bean><name>Name</name></bean>"
+ + "<i>1</i><str>ABC</str></JavaBean2XMLStreamReaderTestCase$MyBean>",
+ xml);
+ }
+
+ private static class MyBean {
+ private String str;
+ private int i;
+ private long arr[];
+ private AnotherBean bean;
+
+ /**
+ * @return the arr
+ */
+ public long[] getArr() {
+ return arr;
+ }
+
+ /**
+ * @param arr the arr to set
+ */
+ public void setArr(long[] arr) {
+ this.arr = arr;
+ }
+
+ /**
+ * @return the i
+ */
+ public int getI() {
+ return i;
+ }
+
+ /**
+ * @param i the i to set
+ */
+ public void setI(int i) {
+ this.i = i;
+ }
+
+ /**
+ * @return the str
+ */
+ public String getStr() {
+ return str;
+ }
+
+ /**
+ * @param str the str to set
+ */
+ public void setStr(String str) {
+ this.str = str;
+ }
+
+ /**
+ * @return the bean
+ */
+ public AnotherBean getBean() {
+ return bean;
+ }
+
+ /**
+ * @param bean the bean to set
+ */
+ public void setBean(AnotherBean bean) {
+ this.bean = bean;
+ }
+
+ }
+
+ private static class AnotherBean {
+ private String name;
+
+ /**
+ * @return the name
+ */
+ public String getName() {
+ return name;
+ }
+
+ /**
+ * @param name the name to set
+ */
+ public void setName(String name) {
+ this.name = name;
+ }
+ }
+
+}
Propchange: incubator/tuscany/branches/sca-java-integration/sca/kernel/core/src/test/java/org/apache/tuscany/core/databinding/xml/JavaBean2XMLStreamReaderTestCase.java
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