/*******************************************************************************
* Copyright (c) 2001, 2011 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*
* Jens Lukowski/Innoopract - initial renaming/restructuring
*
* Balazs Banfai: Bug 154737 getUserData/setUserData support for Node
* https://bugs.eclipse.org/bugs/show_bug.cgi?id=154737
*
* David Carver (STAR) - bug 295127 - implement isSameNode and compareDocumentPosition methods.
* Unit Tests covered in wst.xsl XPath 2.0 tests.
* David Carver (STAR) - bug 296999 - Inefficient use of new String()
*******************************************************************************/
package org.eclipse.wst.xml.core.internal.document;
import java.io.Serializable;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Map;
import org.eclipse.wst.sse.core.internal.model.FactoryRegistry;
import org.eclipse.wst.sse.core.internal.provisional.AbstractNotifier;
import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocument;
import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocumentRegion;
import org.eclipse.wst.sse.core.internal.provisional.text.ITextRegion;
import org.eclipse.wst.xml.core.internal.provisional.document.IDOMModel;
import org.eclipse.wst.xml.core.internal.provisional.document.IDOMNode;
import org.w3c.dom.DOMException;
import org.w3c.dom.DOMImplementation;
import org.w3c.dom.Document;
import org.w3c.dom.DocumentFragment;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.Text;
import org.w3c.dom.TypeInfo;
import org.w3c.dom.UserDataHandler;
/**
* NodeImpl class
*/
public abstract class NodeImpl extends AbstractNotifier implements Node, IDOMNode {
// define one empty nodelist, for repeated use
private final static NodeList EMPTY_NODE_LIST = new NodeListImpl();
// DocumentPosition
//private final static short DOCUMENT_POSITION_DISCONNECTED = 0x01;
private final static short DOCUMENT_POSITION_PRECEDING = 0x02;
private final static short DOCUMENT_POSITION_FOLLOWING = 0x04;
//private final static short DOCUMENT_POSITION_CONTAINS = 0x08;
//private final static short DOCUMENT_POSITION_CONTAINED_BY = 0x10;
private final static short DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC = 0x20;
private boolean fDataEditable = true;
private IStructuredDocumentRegion flatNode = null;
private NodeImpl nextSibling = null;
private DocumentImpl ownerDocument = null;
private NodeImpl parentNode = null;
private NodeImpl previousSibling = null;
// define one empty String constant for repeated use
static final String EMPTY_STRING = "";
/**
* NodeImpl constructor
*/
protected NodeImpl() {
super();
}
/**
* NodeImpl constructor
*
* @param that
* NodeImpl
*/
protected NodeImpl(NodeImpl that) {
if (that != null) {
this.ownerDocument = that.ownerDocument;
}
}
/**
* appendChild method
*
* @return org.w3c.dom.Node
* @param newChild
* org.w3c.dom.Node
*/
public Node appendChild(Node newChild) throws DOMException {
throw new DOMException(DOMException.HIERARCHY_REQUEST_ERR, DOMMessages.HIERARCHY_REQUEST_ERR);
}
/**
* contains method
*
* @return boolean
* @param offset
* int
*/
public boolean contains(int offset) {
return (offset >= getStartOffset() && offset < getEndOffset());
}
/**
* @param s
* @param tagName
* @return
*/
protected String createDOMExceptionMessage(short s, String tagName) {
String result = null;
// TODO: Should localize these messages, and provide /u escaped
// version of tagName
result = lookupMessage(s) + " " + tagName; //$NON-NLS-1$
return result;
}
/**
* getAttributes method
*
* @return org.w3c.dom.NamedNodeMap
*/
public NamedNodeMap getAttributes() {
return null;
}
/**
*/
protected String getCharValue(String name) {
DocumentImpl document = (DocumentImpl) getOwnerDocument();
if (document == null)
return null;
return document.getCharValue(name);
}
/**
* getChildNodes method
*
* @return org.w3c.dom.NodeList
*/
public NodeList getChildNodes() {
// As per DOM spec, correct behavior for getChildNodes is to return a
// zero length NodeList, not null, when there are no children.
// We'll use a common instance of an empty node list, just to prevent
// creating a trival object many many times.
return EMPTY_NODE_LIST;
}
/**
* getCommonAncestor method
*
* @return org.w3c.dom.Node
* @param node
* org.w3c.dom.Node
*/
public Node getCommonAncestor(Node node) {
if (node == null)
return null;
for (Node na = node; na != null; na = na.getParentNode()) {
for (Node ta = this; ta != null; ta = ta.getParentNode()) {
if (ta == na)
return ta;
}
}
return null; // not found
}
/**
* getContainerDocument method
*
* @return org.w3c.dom.Document
*/
public Document getContainerDocument() {
Node parent = null;
for (Node node = this; node != null; node = parent) {
if (node.getNodeType() == Node.DOCUMENT_NODE) {
return (Document) node;
}
/* Break out of a bad hierarchy */
if ((parent = node.getParentNode()) == node)
break;
}
return null;
}
/**
* getEndOffset method
*
* @return int
*/
public int getEndOffset() {
Node node = this;
while (node != null) {
if (node.getNodeType() == Node.ELEMENT_NODE) {
ElementImpl element = (ElementImpl) node;
IStructuredDocumentRegion endStructuredDocumentRegion = element.getEndStructuredDocumentRegion();
if (endStructuredDocumentRegion != null)
return endStructuredDocumentRegion.getEnd();
}
Node last = node.getLastChild();
if (last != null) { // dig into the last
node = last;
continue;
}
IStructuredDocumentRegion lastStructuredDocumentRegion = ((NodeImpl) node).getStructuredDocumentRegion();
if (lastStructuredDocumentRegion != null)
return lastStructuredDocumentRegion.getEnd();
Node prev = node.getPreviousSibling();
if (prev != null) { // move to the previous
node = prev;
continue;
}
Node parent = node.getParentNode();
node = null;
while (parent != null) {
if (parent.getNodeType() == Node.ELEMENT_NODE) {
ElementImpl element = (ElementImpl) parent;
IStructuredDocumentRegion startStructuredDocumentRegion = element.getStartStructuredDocumentRegion();
if (startStructuredDocumentRegion != null)
return startStructuredDocumentRegion.getEnd();
}
Node parentPrev = parent.getPreviousSibling();
if (parentPrev != null) { // move to the previous
node = parentPrev;
break;
}
parent = parent.getParentNode();
}
}
return 0;
}
public IStructuredDocumentRegion getEndStructuredDocumentRegion() {
return null;
}
/**
*/
public FactoryRegistry getFactoryRegistry() {
IDOMModel model = getModel();
if (model != null) {
FactoryRegistry reg = model.getFactoryRegistry();
if (reg != null)
return reg;
}
return null;
}
/**
* getFirstChild method
*
* @return org.w3c.dom.Node
*/
public Node getFirstChild() {
return null;
}
/**
* getFirstStructuredDocumentRegion method
*
*/
public IStructuredDocumentRegion getFirstStructuredDocumentRegion() {
return StructuredDocumentRegionUtil.getStructuredDocumentRegion(this.flatNode);
}
/**
*/
public int getIndex() {
Node parent = getParentNode();
if (parent == null)
return -1; // error
int index = 0;
for (Node child = parent.getFirstChild(); child != null; child = child.getNextSibling()) {
if (child == this)
return index;
index++;
}
return -1; // error
}
/**
* getLastChild method
*
* @return org.w3c.dom.Node
*/
public Node getLastChild() {
return null;
}
/**
* getLastStructuredDocumentRegion method
*
*/
public IStructuredDocumentRegion getLastStructuredDocumentRegion() {
return StructuredDocumentRegionUtil.getStructuredDocumentRegion(this.flatNode);
}
/**
*/
public String getLocalName() {
return null;
}
/**
* the default implementation can just refer to the owning document
*/
public IDOMModel getModel() {
if (this.ownerDocument == null)
return null;
return this.ownerDocument.getModel();
}
/**
* all but attr return null
*/
public ITextRegion getNameRegion() {
return null;
}
/**
*/
public String getNamespaceURI() {
return null;
}
/**
* getNextSibling method
*
* @return org.w3c.dom.Node
*/
public Node getNextSibling() {
return this.nextSibling;
}
/**
* getNodeAt method
*
* @return org.w3c.dom.Node
* @param offset
* int
*/
Node getNodeAt(int offset) {
IDOMNode parent = this;
IDOMNode child = (IDOMNode) getFirstChild();
while (child != null) {
if (child.getEndOffset() <= offset) {
child = (IDOMNode) child.getNextSibling();
continue;
}
if (child.getStartOffset() > offset) {
break;
}
IStructuredDocumentRegion startStructuredDocumentRegion = child.getStartStructuredDocumentRegion();
if (startStructuredDocumentRegion != null) {
if (startStructuredDocumentRegion.getEnd() > offset)
return child;
}
// dig more
parent = child;
child = (IDOMNode) parent.getFirstChild();
}
return parent;
}
/* (non-Javadoc)
* @see org.w3c.dom.Node#getNodeValue()
*/
public String getNodeValue() throws DOMException {
return null;
}
/**
* getOwnerDocument method
*
* @return org.w3c.dom.Document
*/
public Document getOwnerDocument() {
return this.ownerDocument;
}
/**
* getParentNode method
*
* @return org.w3c.dom.Node
*/
public Node getParentNode() {
return this.parentNode;
}
/**
*/
public String getPrefix() {
return null;
}
/**
* getPreviousSibling method
*
* @return org.w3c.dom.Node
*/
public Node getPreviousSibling() {
return this.previousSibling;
}
/**
*/
public String getSource() {
if (this.flatNode == null)
return NodeImpl.EMPTY_STRING;
return this.flatNode.getText();
}
/**
* getStartOffset method
*
* @return int
*/
public int getStartOffset() {
if (this.flatNode != null)
return this.flatNode.getStart();
NodeImpl prev = (NodeImpl) getPreviousSibling();
if (prev != null)
return prev.getEndOffset();
Node parent = getParentNode();
if (parent != null && parent.getNodeType() == Node.ELEMENT_NODE) {
ElementImpl element = (ElementImpl) parent;
if (element.hasStartTag())
return element.getStartEndOffset();
return element.getStartOffset();
}
// final fallback to look into first child
NodeImpl child = (NodeImpl) getFirstChild();
while (child != null) {
IStructuredDocumentRegion childStructuredDocumentRegion = child.getStructuredDocumentRegion();
if (childStructuredDocumentRegion != null)
return childStructuredDocumentRegion.getStart();
child = (NodeImpl) child.getFirstChild();
}
return 0;
}
public IStructuredDocumentRegion getStartStructuredDocumentRegion() {
return getFirstStructuredDocumentRegion();
}
/**
* Every node (indirectly) knows its structuredDocument
*/
public IStructuredDocument getStructuredDocument() {
return getModel().getStructuredDocument();
}
/**
*/
IStructuredDocumentRegion getStructuredDocumentRegion() {
return this.flatNode;
}
/**
* all but attr return null
*/
public ITextRegion getValueRegion() {
return null;
}
/**
*/
public String getValueSource() {
return getNodeValue();
}
/* (non-Javadoc)
* @see org.w3c.dom.Node#hasAttributes()
*/
public boolean hasAttributes() {
return false;
}
/* (non-Javadoc)
* @see org.w3c.dom.Node#hasChildNodes()
*/
public boolean hasChildNodes() {
return false;
}
/**
* hasProperties method
*
* @return boolean
*/
public boolean hasProperties() {
return false;
}
/**
* insertBefore method
*
* @return org.w3c.dom.Node
* @param newChild
* org.w3c.dom.Node
* @param refChild
* org.w3c.dom.Node
*/
public Node insertBefore(Node newChild, Node refChild) throws DOMException {
throw new DOMException(DOMException.HIERARCHY_REQUEST_ERR, DOMMessages.HIERARCHY_REQUEST_ERR);
}
public boolean isChildEditable() {
return false;
}
/**
*/
public boolean isClosed() {
return true;
}
/**
* isContainer method
*
* @return boolean
*/
public boolean isContainer() {
return false;
}
public boolean isDataEditable() {
if (!fDataEditable) {
DOMModelImpl model = (DOMModelImpl) getModel();
if (model != null && model.isReparsing()) {
return true;
}
}
return fDataEditable;
}
/**
*/
public boolean isSupported(String feature, String version) {
if (this.ownerDocument == null)
return false;
DOMImplementation impl = this.ownerDocument.getImplementation();
if (impl == null)
return false;
return impl.hasFeature(feature, version);
}
/**
* @param s
* @return
*/
private String lookupMessage(short s) {
// TODO: make localized version
String result = null;
switch (s) {
case DOMException.DOMSTRING_SIZE_ERR :
result = DOMMessages.DOMSTRING_SIZE_ERR;
break;
case DOMException.HIERARCHY_REQUEST_ERR :
result = DOMMessages.HIERARCHY_REQUEST_ERR;
break;
case DOMException.INDEX_SIZE_ERR :
result = DOMMessages.INDEX_SIZE_ERR;
break;
case DOMException.INUSE_ATTRIBUTE_ERR :
result = DOMMessages.INUSE_ATTRIBUTE_ERR;
break;
case DOMException.INVALID_ACCESS_ERR :
result = DOMMessages.INVALID_ACCESS_ERR;
break;
case DOMException.INVALID_CHARACTER_ERR :
result = DOMMessages.INVALID_CHARACTER_ERR;
break;
case DOMException.INVALID_MODIFICATION_ERR :
result = DOMMessages.INVALID_MODIFICATION_ERR;
break;
case DOMException.INVALID_STATE_ERR :
result = DOMMessages.INVALID_STATE_ERR;
break;
case DOMException.NAMESPACE_ERR :
result = DOMMessages.NAMESPACE_ERR;
break;
case DOMException.NO_DATA_ALLOWED_ERR :
result = DOMMessages.NO_DATA_ALLOWED_ERR;
break;
case DOMException.NO_MODIFICATION_ALLOWED_ERR :
result = DOMMessages.NO_MODIFICATION_ALLOWED_ERR;
break;
case DOMException.NOT_FOUND_ERR :
result = DOMMessages.NOT_FOUND_ERR;
break;
case DOMException.NOT_SUPPORTED_ERR :
result = DOMMessages.NOT_SUPPORTED_ERR;
break;
case DOMException.SYNTAX_ERR :
result = DOMMessages.SYNTAX_ERR;
break;
case 17:// DOMException.TYPE_MISMATCH_ERR :
result = DOMMessages.TYPE_MISMATCH_ERR;
break;
case 16:// DOMException.VALIDATION_ERR :
result = DOMMessages.VALIDATION_ERR;
break;
case DOMException.WRONG_DOCUMENT_ERR :
result = DOMMessages.WRONG_DOCUMENT_ERR;
break;
default :
result = NodeImpl.EMPTY_STRING;
break;
}
return result;
}
/**
* normalize method
*/
public void normalize() {
TextImpl prevText = null;
for (Node child = getFirstChild(); child != null; child = child.getNextSibling()) {
switch (child.getNodeType()) {
case TEXT_NODE : {
if (prevText == null) {
prevText = (TextImpl) child;
break;
}
Text text = (Text) child;
removeChild(text);
prevText.appendText(text);
child = prevText;
break;
}
case ELEMENT_NODE : {
Element element = (Element) child;
element.normalize();
prevText = null;
break;
}
default :
prevText = null;
break;
}
}
}
protected void notifyEditableChanged() {
DocumentImpl document = (DocumentImpl) getContainerDocument();
if (document == null)
return;
DOMModelImpl model = (DOMModelImpl) document.getModel();
if (model == null)
return;
model.editableChanged(this);
}
/**
* notifyValueChanged method
*/
protected void notifyValueChanged() {
DocumentImpl document = (DocumentImpl) getContainerDocument();
if (document == null)
return;
syncDataEditableState();
DOMModelImpl model = (DOMModelImpl) document.getModel();
if (model == null)
return;
model.valueChanged(this);
}
/**
* removeChild method
*
* @return org.w3c.dom.Node
* @param oldChild
* org.w3c.dom.Node
*/
public Node removeChild(Node oldChild) throws DOMException {
throw new DOMException(DOMException.NOT_FOUND_ERR, DOMMessages.NOT_FOUND_ERR);
}
/**
* removeChildNodes method
*/
public void removeChildNodes() {
}
/**
* removeChildNodes method
*
* @return org.w3c.dom.DocumentFragment
* @param firstChild
* org.w3c.dom.Node
* @param lastChild
* org.w3c.dom.Node
*/
public DocumentFragment removeChildNodes(Node firstChild, Node lastChild) {
return null;
}
/**
* replaceChild method
*
* @return org.w3c.dom.Node
* @param newChild
* org.w3c.dom.Node
* @param oldChild
* org.w3c.dom.Node
*/
public Node replaceChild(Node newChild, Node oldChild) throws DOMException {
throw new DOMException(DOMException.HIERARCHY_REQUEST_ERR, DOMMessages.HIERARCHY_REQUEST_ERR);
}
/**
* Resets children values from IStructuredDocumentRegion.
*/
void resetStructuredDocumentRegions() {
for (NodeImpl child = (NodeImpl) getFirstChild(); child != null; child = (NodeImpl) child.getNextSibling()) {
child.resetStructuredDocumentRegions();
}
this.flatNode = null;
}
public void setChildEditable(boolean editable) {
// nop
}
public void setDataEditable(boolean editable) {
if (fDataEditable == editable) {
return;
}
ReadOnlyController roc = ReadOnlyController.getInstance();
if (editable) {
roc.unlockData(this);
}
else {
roc.lockData(this);
}
fDataEditable = editable;
notifyEditableChanged();
}
public void setEditable(boolean editable, boolean deep) {
if (deep) {
IDOMNode node = (IDOMNode) getFirstChild();
while (node != null) {
node.setEditable(editable, deep);
node = (IDOMNode) node.getNextSibling();
}
}
setChildEditable(editable);
setDataEditable(editable);
}
/**
* setNextSibling method
*
* @param nextSibling
* org.w3c.dom.Node
*/
protected void setNextSibling(Node nextSibling) {
this.nextSibling = (NodeImpl) nextSibling;
}
/**
* setNodeValue method
*
* @param nodeValue
* java.lang.String
*/
public void setNodeValue(String nodeValue) throws DOMException {
}
/**
* setOwnerDocument method
*
* @param ownerDocument
* org.w3c.dom.Document
*/
protected void setOwnerDocument(Document ownerDocument) {
this.ownerDocument = (DocumentImpl) ownerDocument;
}
/**
*/
protected void setOwnerDocument(Document ownerDocument, boolean deep) {
this.ownerDocument = (DocumentImpl) ownerDocument;
if (deep) {
for (NodeImpl child = (NodeImpl) getFirstChild(); child != null; child = (NodeImpl) child.getNextSibling()) {
child.setOwnerDocument(ownerDocument, deep);
}
}
}
/**
* setParentNode method
*
* @param parentNode
* org.w3c.dom.Node
*/
protected void setParentNode(Node parentNode) {
this.parentNode = (NodeImpl) parentNode;
}
/**
*/
public void setPrefix(String prefix) throws DOMException {
}
/**
* setPreviousSibling method
*
* @param previousSibling
* org.w3c.dom.Node
*/
protected void setPreviousSibling(Node previousSibling) {
this.previousSibling = (NodeImpl) previousSibling;
}
/**
*/
public void setSource(String source) throws InvalidCharacterException {
// not supported
}
/**
*/
void setStructuredDocumentRegion(IStructuredDocumentRegion flatNode) {
this.flatNode = flatNode;
}
/**
*/
public void setValueSource(String source) {
setNodeValue(source);
}
protected void syncDataEditableState() {
ReadOnlyController roc = ReadOnlyController.getInstance();
if (fDataEditable) {
roc.unlockData(this);
}
else {
roc.lockData(this);
}
}
/**
* toString method
*
* @return java.lang.String
*/
public String toString() {
return getNodeName();
}
public int getLength() {
int result = -1;
int start = getStartOffset();
if (start >= 0) {
int end = getEndOffset();
if (end >= 0) {
result = end - start;
if (result < -1) {
result = -1;
}
}
}
return result;
}
/* (non-Javadoc)
* @see org.w3c.dom.Node#compareDocumentPosition(org.w3c.dom.Node)
*/
public short compareDocumentPosition(Node other) throws DOMException {
if (!(other instanceof IDOMNode))
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, DOMMessages.NOT_SUPPORTED_ERR);
int nodeStart = this.getStartOffset();
int otherStart = ((IDOMNode) other).getStartOffset();
if (otherStart > nodeStart) {
return DOCUMENT_POSITION_FOLLOWING;
}
else if (otherStart < nodeStart) {
return DOCUMENT_POSITION_PRECEDING;
}
return DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC;
}
/**
* NOT IMPLEMENTED, is defined here in preparation of DOM Level 3
*/
public String getBaseURI() {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Not implemented in this version."); //$NON-NLS-1$
}
/**
* NOT IMPLEMENTED, is defined here in preparation of DOM Level 3
*/
public Object getFeature(String feature, String version) {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Not implemented in this version."); //$NON-NLS-1$
}
/*
* (non-Javadoc)
*
* @see org.w3c.dom.Node#getTextContent()
*/
public String getTextContent() throws DOMException {
switch (getNodeType()) {
case Node.DOCUMENT_NODE :
case Node.DOCUMENT_TYPE_NODE :
case Node.NOTATION_NODE :
return null;
case Node.TEXT_NODE :
case Node.CDATA_SECTION_NODE :
case Node.COMMENT_NODE :
case Node.PROCESSING_INSTRUCTION_NODE :
return getNodeValue();
}
if (hasChildNodes()) {
final StringBuffer builder = new StringBuffer();
Node child = getFirstChild();
while (child != null) {
short nodeType = child.getNodeType();
if (nodeType == Node.COMMENT_NODE || nodeType == Node.PROCESSING_INSTRUCTION_NODE) {
child = child.getNextSibling();
continue;
}
String text = ((IDOMNode) child).getTextContent();
if (text != null) {
builder.append(text);
}
child = child.getNextSibling();
}
return builder.toString();
}
return EMPTY_STRING;
}
/**
* NOT IMPLEMENTED, is defined here in preparation of DOM Level 3
*/
public boolean isDefaultNamespace(String namespaceURI) {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Not implemented in this version."); //$NON-NLS-1$
}
/* (non-Javadoc)
* @see org.w3c.dom.Node#isEqualNode(org.w3c.dom.Node)
*/
public boolean isEqualNode(Node arg) {
return this.equals(arg);
}
/* (non-Javadoc)
* @see org.w3c.dom.Node#isSameNode(org.w3c.dom.Node)
*/
public boolean isSameNode(Node other) {
return this == other;
}
/**
* NOT IMPLEMENTED, is defined here in preparation of DOM Level 3
*/
public String lookupNamespaceURI(String prefix) {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Not implemented in this version."); //$NON-NLS-1$
}
/**
* NOT IMPLEMENTED, is defined here in preparation of DOM Level 3
*/
public String lookupPrefix(String namespaceURI) {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Not implemented in this version."); //$NON-NLS-1$
}
/**
* NOT IMPLEMENTED, is defined here in preparation of DOM Level 3
*/
public void setTextContent(String textContent) throws DOMException {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Not implemented in this version."); //$NON-NLS-1$
}
/**
* NOT IMPLEMENTED, is defined here in preparation of DOM Level 3
*/
public TypeInfo getSchemaTypeInfo() {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Not implemented in this version."); //$NON-NLS-1$
}
/**
* NOT IMPLEMENTED, is defined here in preparation of DOM Level 3
*/
public boolean isId() {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Not implemented in this version."); //$NON-NLS-1$
}
/**
* Retrieves the object for a node associated to a key.
*
* @param key The key associated with the object.
* @return object The object for this node, associated with the key passed
* or null if there was none set.
*
* @since DOM Level 3
*/
public Object getUserData(String key) {
if (key==null) return null;
Map userDataTable = UserData.getInstance().getUserDataTable(this);
if (userDataTable!=null) {
UserDataAndHandler userDataAndHandler = (UserDataAndHandler) userDataTable.get(key);
if (userDataAndHandler!=null) {
return userDataAndHandler.getData();
}
}
return null;
}
/**
* Sets the user data and handler for a key
*
* @param key The key associated with the object.
* @param object The object for this node, associated with the key passed.
* Null passed removes the existing association to the key.
* @param handler UserDataHandler for the userdata associated with this key
* @return Object The previous userdata object if set, null if it was none.
*
* @since DOM Level 3
*/
public Object setUserData(String key, Object data, UserDataHandler handler) {
UserDataAndHandler previousDataAndHandler=null;
//return immediately for null keys
if (key ==null) return null;
Map userDataTable = UserData.getInstance().getUserDataTable(this);
//remove association for the key if data is null
if (data==null) {
if (userDataTable==null) return null;
//see if there is a previous value set
previousDataAndHandler = (UserDataAndHandler) userDataTable.get(key);
if (previousDataAndHandler!=null) {
userDataTable.remove(key);
return previousDataAndHandler.getData();
}
//there is no previous value found
return null;
}
//if data passed is not null
//the first data in the hashtable
if (userDataTable==null) {
userDataTable=new Hashtable();
UserDataAndHandler userDataAndHandler=new UserDataAndHandler(data,handler);
userDataTable.put(key,userDataAndHandler);
return null;
//there is already data in the hashtable
} else {
UserDataAndHandler userDataAndHandler=new UserDataAndHandler(data,handler);
previousDataAndHandler=(UserDataAndHandler) userDataTable.put(key,userDataAndHandler);
//if we replace a value
if (previousDataAndHandler!=null)
return previousDataAndHandler.getData();
else {
return null;
}
}
}
/**
* Notifies the UserDataHandlers of the node.
*
* @param operation
* @param destination
*/
protected void notifyUserDataHandlers(short operation, Node destination) {
if (operation!=UserDataHandler.NODE_ADOPTED
& operation!=UserDataHandler.NODE_CLONED
& operation!=UserDataHandler.NODE_DELETED
& operation!=UserDataHandler.NODE_IMPORTED
& operation!=UserDataHandler.NODE_RENAMED)
return;
Map userDataTable = UserData.getInstance().getUserDataTable(this);
if (userDataTable!=null) {
Iterator entries =userDataTable.entrySet().iterator();
while (entries.hasNext()) {
Map.Entry entry = (Map.Entry) entries.next();
String key = entry.getKey().toString(); //should always be a string
UserDataAndHandler dataAndHandler = (UserDataAndHandler) entry.getValue();
if (dataAndHandler!=null) {
UserDataHandler dataHandler=dataAndHandler.getHandler();
if (dataHandler!=null) {
dataHandler.handle(operation, key, dataAndHandler.getData(), this, destination);
}
}
}
}
}
/**
*
* Class for user data and UserDataHandler
*/
protected static class UserDataAndHandler implements Serializable {
/**
* Generated Serial ID
*/
private static final long serialVersionUID = 4860521237315444841L;
/**
* Generated serialization version
*/
private Object data;
private UserDataHandler handler;
public UserDataAndHandler(Object data, UserDataHandler handler)
{
this.data=data;
this.handler=handler;
}
public Object getData() {
return data;
}
public void setData(Object data) {
this.data = data;
}
public UserDataHandler getHandler() {
return handler;
}
public void setHandler(UserDataHandler handler) {
this.handler = handler;
}
}
}