Initial revision
From-SVN: r102074
This commit is contained in:
Tom Tromey
@@ -0,0 +1,523 @@
|
||||
/* DomElement.java --
|
||||
Copyright (C) 1999,2000,2001,2004 Free Software Foundation, Inc.
|
||||
|
||||
This file is part of GNU Classpath.
|
||||
|
||||
GNU Classpath is free software; you can redistribute it and/or modify
|
||||
it under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation; either version 2, or (at your option)
|
||||
any later version.
|
||||
|
||||
GNU Classpath is distributed in the hope that it will be useful, but
|
||||
WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with GNU Classpath; see the file COPYING. If not, write to the
|
||||
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
||||
02110-1301 USA.
|
||||
|
||||
Linking this library statically or dynamically with other modules is
|
||||
making a combined work based on this library. Thus, the terms and
|
||||
conditions of the GNU General Public License cover the whole
|
||||
combination.
|
||||
|
||||
As a special exception, the copyright holders of this library give you
|
||||
permission to link this library with independent modules to produce an
|
||||
executable, regardless of the license terms of these independent
|
||||
modules, and to copy and distribute the resulting executable under
|
||||
terms of your choice, provided that you also meet, for each linked
|
||||
independent module, the terms and conditions of the license of that
|
||||
module. An independent module is a module which is not derived from
|
||||
or based on this library. If you modify this library, you may extend
|
||||
this exception to your version of the library, but you are not
|
||||
obligated to do so. If you do not wish to do so, delete this
|
||||
exception statement from your version. */
|
||||
|
||||
package gnu.xml.dom;
|
||||
|
||||
import java.util.HashSet;
|
||||
import java.util.Set;
|
||||
import javax.xml.XMLConstants;
|
||||
|
||||
import org.w3c.dom.Attr;
|
||||
import org.w3c.dom.DOMException;
|
||||
import org.w3c.dom.Element;
|
||||
import org.w3c.dom.NamedNodeMap;
|
||||
import org.w3c.dom.Node;
|
||||
import org.w3c.dom.TypeInfo;
|
||||
|
||||
/**
|
||||
* <p> "Element" implementation.
|
||||
*
|
||||
* @author David Brownell
|
||||
* @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
|
||||
*/
|
||||
public class DomElement
|
||||
extends DomNsNode
|
||||
implements Element
|
||||
{
|
||||
|
||||
/**
|
||||
* User-defined ID attributes.
|
||||
* Used by DomAttr.isId and DomDocument.getElementById
|
||||
*/
|
||||
Set userIdAttrs;
|
||||
|
||||
// Attributes are VERY expensive in DOM, and not just for
|
||||
// this implementation. Avoid creating them.
|
||||
private DomNamedNodeMap attributes;
|
||||
|
||||
// xml:space cache
|
||||
String xmlSpace = "";
|
||||
|
||||
/**
|
||||
* Constructs an Element node associated with the specified document.
|
||||
*
|
||||
* <p>This constructor should only be invoked by a Document as part
|
||||
* of its createElement functionality, or through a subclass which is
|
||||
* similarly used in a "Sub-DOM" style layer.
|
||||
*
|
||||
* @param owner The document with which this node is associated
|
||||
* @param namespaceURI Combined with the local part of the name,
|
||||
* this is used to uniquely identify a type of element
|
||||
* @param name Name of this element, which may include a prefix
|
||||
*/
|
||||
protected DomElement(DomDocument owner, String namespaceURI, String name)
|
||||
{
|
||||
super(ELEMENT_NODE, owner, namespaceURI, name);
|
||||
}
|
||||
|
||||
/**
|
||||
* <b>DOM L1</b>
|
||||
* Returns the element's attributes
|
||||
*/
|
||||
public NamedNodeMap getAttributes()
|
||||
{
|
||||
if (attributes == null)
|
||||
{
|
||||
attributes = new DomNamedNodeMap(this, Node.ATTRIBUTE_NODE);
|
||||
}
|
||||
return attributes;
|
||||
}
|
||||
|
||||
/**
|
||||
* <b>DOM L2></b>
|
||||
* Returns true iff this is an element node with attributes.
|
||||
*/
|
||||
public boolean hasAttributes()
|
||||
{
|
||||
return attributes != null && attributes.length != 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* Shallow clone of the element, except that associated
|
||||
* attributes are (deep) cloned.
|
||||
*/
|
||||
public Object clone()
|
||||
{
|
||||
DomElement node = (DomElement) super.clone();
|
||||
|
||||
if (attributes != null)
|
||||
{
|
||||
node.attributes = new DomNamedNodeMap(node, Node.ATTRIBUTE_NODE);
|
||||
for (DomNode ctx = attributes.first; ctx != null; ctx = ctx.next)
|
||||
{
|
||||
node.attributes.setNamedItemNS(ctx.cloneNode(true));
|
||||
}
|
||||
}
|
||||
return node;
|
||||
}
|
||||
|
||||
void setOwner(DomDocument doc)
|
||||
{
|
||||
if (attributes != null)
|
||||
{
|
||||
for (DomNode ctx = attributes.first; ctx != null; ctx = ctx.next)
|
||||
{
|
||||
ctx.setOwner(doc);
|
||||
}
|
||||
}
|
||||
super.setOwner(doc);
|
||||
}
|
||||
|
||||
/**
|
||||
* Marks this element, its children, and its associated attributes as
|
||||
* readonly.
|
||||
*/
|
||||
public void makeReadonly()
|
||||
{
|
||||
super.makeReadonly();
|
||||
if (attributes != null)
|
||||
{
|
||||
attributes.makeReadonly();
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* <b>DOM L1</b>
|
||||
* Returns the element name (same as getNodeName).
|
||||
*/
|
||||
final public String getTagName()
|
||||
{
|
||||
return getNodeName();
|
||||
}
|
||||
|
||||
/**
|
||||
* <b>DOM L1</b>
|
||||
* Returns the value of the specified attribute, or an
|
||||
* empty string.
|
||||
*/
|
||||
public String getAttribute(String name)
|
||||
{
|
||||
if ("xml:space" == name) // NB only works on interned string
|
||||
{
|
||||
// Use cached value
|
||||
return xmlSpace;
|
||||
}
|
||||
Attr attr = getAttributeNode(name);
|
||||
return (attr == null) ? "" : attr.getValue();
|
||||
}
|
||||
|
||||
/**
|
||||
* <b>DOM L2</b>
|
||||
* Returns true if the element has an attribute with the
|
||||
* specified name (specified or DTD defaulted).
|
||||
*/
|
||||
public boolean hasAttribute(String name)
|
||||
{
|
||||
return getAttributeNode(name) != null;
|
||||
}
|
||||
|
||||
/**
|
||||
* <b>DOM L2</b>
|
||||
* Returns true if the element has an attribute with the
|
||||
* specified name (specified or DTD defaulted).
|
||||
*/
|
||||
public boolean hasAttributeNS(String namespaceURI, String local)
|
||||
{
|
||||
return getAttributeNodeNS(namespaceURI, local) != null;
|
||||
}
|
||||
|
||||
/**
|
||||
* <b>DOM L2</b>
|
||||
* Returns the value of the specified attribute, or an
|
||||
* empty string.
|
||||
*/
|
||||
public String getAttributeNS(String namespaceURI, String local)
|
||||
{
|
||||
Attr attr = getAttributeNodeNS(namespaceURI, local);
|
||||
return (attr == null) ? "" : attr.getValue();
|
||||
}
|
||||
|
||||
/**
|
||||
* <b>DOM L1</b>
|
||||
* Returns the appropriate attribute node; the name is the
|
||||
* nodeName property of the attribute.
|
||||
*/
|
||||
public Attr getAttributeNode(String name)
|
||||
{
|
||||
return (attributes == null) ? null :
|
||||
(Attr) attributes.getNamedItem(name);
|
||||
}
|
||||
|
||||
/**
|
||||
* <b>DOM L2</b>
|
||||
* Returns the appropriate attribute node; the name combines
|
||||
* the namespace name and the local part.
|
||||
*/
|
||||
public Attr getAttributeNodeNS(String namespace, String localPart)
|
||||
{
|
||||
return (attributes == null) ? null :
|
||||
(Attr) attributes.getNamedItemNS(namespace, localPart);
|
||||
}
|
||||
|
||||
/**
|
||||
* <b>DOM L1</b>
|
||||
* Modifies an existing attribute to have the specified value,
|
||||
* or creates a new one with that value. The name used is the
|
||||
* nodeName value.
|
||||
*/
|
||||
public void setAttribute(String name, String value)
|
||||
{
|
||||
Attr attr = getAttributeNode(name);
|
||||
if (attr != null)
|
||||
{
|
||||
attr.setNodeValue(value);
|
||||
((DomAttr) attr).setSpecified(true);
|
||||
return;
|
||||
}
|
||||
attr = owner.createAttribute(name);
|
||||
attr.setNodeValue(value);
|
||||
setAttributeNode(attr);
|
||||
}
|
||||
|
||||
/**
|
||||
* <b>DOM L2</b>
|
||||
* Modifies an existing attribute to have the specified value,
|
||||
* or creates a new one with that value.
|
||||
*/
|
||||
public void setAttributeNS(String uri, String aname, String value)
|
||||
{
|
||||
if (("xmlns".equals (aname) || aname.startsWith ("xmlns:"))
|
||||
&& !XMLConstants.XMLNS_ATTRIBUTE_NS_URI.equals (uri))
|
||||
{
|
||||
throw new DomDOMException(DOMException.NAMESPACE_ERR,
|
||||
"setting xmlns attribute to illegal value", this, 0);
|
||||
}
|
||||
|
||||
Attr attr = getAttributeNodeNS(uri, aname);
|
||||
if (attr != null)
|
||||
{
|
||||
attr.setNodeValue(value);
|
||||
return;
|
||||
}
|
||||
attr = owner.createAttributeNS(uri, aname);
|
||||
attr.setNodeValue(value);
|
||||
setAttributeNodeNS(attr);
|
||||
}
|
||||
|
||||
/**
|
||||
* <b>DOM L1</b>
|
||||
* Stores the specified attribute, optionally overwriting any
|
||||
* existing one with that name.
|
||||
*/
|
||||
public Attr setAttributeNode(Attr attr)
|
||||
{
|
||||
return (Attr) getAttributes().setNamedItem(attr);
|
||||
}
|
||||
|
||||
/**
|
||||
* <b>DOM L2</b>
|
||||
* Stores the specified attribute, optionally overwriting any
|
||||
* existing one with that name.
|
||||
*/
|
||||
public Attr setAttributeNodeNS(Attr attr)
|
||||
{
|
||||
return (Attr) getAttributes().setNamedItemNS(attr);
|
||||
}
|
||||
|
||||
/**
|
||||
* <b>DOM L1</b>
|
||||
* Removes the appropriate attribute node.
|
||||
* If there is no such node, this is (bizarrely enough) a NOP so you
|
||||
* won't see exceptions if your code deletes non-existent attributes.
|
||||
*
|
||||
* <p>Note that since there is no portable way for DOM to record
|
||||
* DTD information, default values for attributes will never be
|
||||
* provided automatically.
|
||||
*/
|
||||
public void removeAttribute(String name)
|
||||
{
|
||||
if (attributes == null)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
try
|
||||
{
|
||||
attributes.removeNamedItem(name);
|
||||
}
|
||||
catch (DomDOMException e)
|
||||
{
|
||||
if (e.code != DOMException.NOT_FOUND_ERR)
|
||||
{
|
||||
throw e;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* <b>DOM L1</b>
|
||||
* Removes the appropriate attribute node; the name is the
|
||||
* nodeName property of the attribute.
|
||||
*
|
||||
* <p>Note that since there is no portable way for DOM to record
|
||||
* DTD information, default values for attributes will never be
|
||||
* provided automatically.
|
||||
*/
|
||||
public Attr removeAttributeNode(Attr node)
|
||||
{
|
||||
if (attributes == null)
|
||||
{
|
||||
throw new DomDOMException(DOMException.NOT_FOUND_ERR, null, node, 0);
|
||||
}
|
||||
return (Attr) attributes.removeNamedItem(node.getNodeName());
|
||||
}
|
||||
|
||||
/**
|
||||
* <b>DOM L2</b>
|
||||
* Removes the appropriate attribute node; the name combines
|
||||
* the namespace name and the local part.
|
||||
*
|
||||
* <p>Note that since there is no portable way for DOM to record
|
||||
* DTD information, default values for attributes will never be
|
||||
* provided automatically.
|
||||
*/
|
||||
public void removeAttributeNS(String namespace, String localPart)
|
||||
{
|
||||
if (attributes == null)
|
||||
{
|
||||
throw new DomDOMException(DOMException.NOT_FOUND_ERR, localPart, null, 0);
|
||||
}
|
||||
attributes.removeNamedItemNS (namespace, localPart);
|
||||
}
|
||||
|
||||
// DOM Level 3 methods
|
||||
|
||||
public String lookupPrefix(String namespaceURI)
|
||||
{
|
||||
if (namespaceURI == null)
|
||||
{
|
||||
return null;
|
||||
}
|
||||
String namespace = getNamespaceURI();
|
||||
if (namespace != null && namespace.equals(namespaceURI))
|
||||
{
|
||||
return getPrefix();
|
||||
}
|
||||
if (attributes != null)
|
||||
{
|
||||
for (DomNode ctx = attributes.first; ctx != null; ctx = ctx.next)
|
||||
{
|
||||
if (XMLConstants.XMLNS_ATTRIBUTE_NS_URI
|
||||
.equals(ctx.getNamespaceURI()))
|
||||
{
|
||||
String value = ctx.getNodeValue();
|
||||
if (value.equals(namespaceURI))
|
||||
{
|
||||
return ctx.getLocalName();
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
return super.lookupPrefix(namespaceURI);
|
||||
}
|
||||
|
||||
public boolean isDefaultNamespace(String namespaceURI)
|
||||
{
|
||||
String namespace = getNamespaceURI();
|
||||
if (namespace != null && namespace.equals(namespaceURI))
|
||||
{
|
||||
return getPrefix() == null;
|
||||
}
|
||||
if (attributes != null)
|
||||
{
|
||||
for (DomNode ctx = attributes.first; ctx != null; ctx = ctx.next)
|
||||
{
|
||||
if (XMLConstants.XMLNS_ATTRIBUTE_NS_URI
|
||||
.equals(ctx.getNamespaceURI()))
|
||||
{
|
||||
String qName = ctx.getNodeName();
|
||||
return (XMLConstants.XMLNS_ATTRIBUTE.equals(qName));
|
||||
}
|
||||
}
|
||||
}
|
||||
return super.isDefaultNamespace(namespaceURI);
|
||||
}
|
||||
|
||||
public String lookupNamespaceURI(String prefix)
|
||||
{
|
||||
String namespace = getNamespaceURI();
|
||||
if (namespace != null && equal(prefix, getPrefix()))
|
||||
{
|
||||
return namespace;
|
||||
}
|
||||
if (attributes != null)
|
||||
{
|
||||
for (DomNode ctx = attributes.first; ctx != null; ctx = ctx.next)
|
||||
{
|
||||
if (XMLConstants.XMLNS_ATTRIBUTE_NS_URI
|
||||
.equals(ctx.getNamespaceURI()))
|
||||
{
|
||||
if (prefix == null)
|
||||
{
|
||||
if (XMLConstants.XMLNS_ATTRIBUTE.equals(ctx.getNodeName()))
|
||||
{
|
||||
return ctx.getNodeValue();
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
if (prefix.equals(ctx.getLocalName()))
|
||||
{
|
||||
return ctx.getNodeValue();
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
return super.lookupNamespaceURI(prefix);
|
||||
}
|
||||
|
||||
public String getBaseURI()
|
||||
{
|
||||
if (attributes != null)
|
||||
{
|
||||
Node xmlBase =
|
||||
attributes.getNamedItemNS(XMLConstants.XML_NS_URI, "base");
|
||||
if (xmlBase != null)
|
||||
{
|
||||
return xmlBase.getNodeValue();
|
||||
}
|
||||
}
|
||||
return super.getBaseURI();
|
||||
}
|
||||
|
||||
public TypeInfo getSchemaTypeInfo()
|
||||
{
|
||||
// DTD implementation
|
||||
DomDoctype doctype = (DomDoctype) owner.getDoctype();
|
||||
if (doctype != null)
|
||||
{
|
||||
return doctype.getElementTypeInfo(getNodeName());
|
||||
}
|
||||
// TODO XML Schema implementation
|
||||
return null;
|
||||
}
|
||||
|
||||
public void setIdAttribute(String name, boolean isId)
|
||||
{
|
||||
NamedNodeMap attrs = getAttributes();
|
||||
Attr attr = (Attr) attrs.getNamedItem(name);
|
||||
setIdAttributeNode(attr, isId);
|
||||
}
|
||||
|
||||
public void setIdAttributeNode(Attr attr, boolean isId)
|
||||
{
|
||||
if (readonly)
|
||||
{
|
||||
throw new DomDOMException(DOMException.NO_MODIFICATION_ALLOWED_ERR);
|
||||
}
|
||||
if (attr == null || attr.getOwnerElement() != this)
|
||||
{
|
||||
throw new DomDOMException(DOMException.NOT_FOUND_ERR);
|
||||
}
|
||||
if (isId)
|
||||
{
|
||||
if (userIdAttrs == null)
|
||||
{
|
||||
userIdAttrs = new HashSet();
|
||||
}
|
||||
userIdAttrs.add(attr);
|
||||
}
|
||||
else if (userIdAttrs != null)
|
||||
{
|
||||
userIdAttrs.remove(attr);
|
||||
if (userIdAttrs.isEmpty())
|
||||
{
|
||||
userIdAttrs = null;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
public void setIdAttributeNS(String namespaceURI, String localName,
|
||||
boolean isId)
|
||||
{
|
||||
NamedNodeMap attrs = getAttributes();
|
||||
Attr attr = (Attr) attrs.getNamedItemNS(namespaceURI, localName);
|
||||
setIdAttributeNode(attr, isId);
|
||||
}
|
||||
|
||||
}
|
||||
Reference in New Issue
Block a user