/*
* $Id: ProxyElementAdapter.java 651946 2008-04-27 13:41:38Z apetrelli $
*
* 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.struts2.views.xslt;
import java.util.ArrayList;
import java.util.List;
import org.w3c.dom.Attr;
import org.w3c.dom.DOMException;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.TypeInfo;
import com.opensymphony.xwork2.util.logging.Logger;
import com.opensymphony.xwork2.util.logging.LoggerFactory;
/**
* ProxyElementAdapter is a pass-through adapter for objects which already
* implement the Element interface. All methods are proxied to the underlying
* Node except getParent(), getNextSibling() and getPreviousSibling(), which
* are implemented by the abstract adapter node to work with the parent adapter.
*
* Note: this class wants to be (extend) both an AbstractElementAdapter
* and ProxyElementAdapter, but its proxy-ness is winning right now.
*/
public class ProxyElementAdapter extends ProxyNodeAdapter implements Element {
private Logger log = LoggerFactory.getLogger(this.getClass());
public ProxyElementAdapter(AdapterFactory factory, AdapterNode parent, Element value) {
super(factory, parent, value);
}
/**
* Get the proxied Element
*/
protected Element element() {
return (Element) getPropertyValue();
}
protected List<Node> buildChildAdapters() {
List<Node> adapters = new ArrayList<Node>();
NodeList children = node().getChildNodes();
for (int i = 0; i < children.getLength(); i++) {
Node child = children.item(i);
Node adapter = wrap(child);
if (adapter != null) {
log.debug("wrapped child node: " + child.getNodeName());
adapters.add(adapter);
}
}
return adapters;
}
// Proxied Element methods
public String getTagName() {
return element().getTagName();
}
public boolean hasAttribute(String name) {
return element().hasAttribute(name);
}
public String getAttribute(String name) {
return element().getAttribute(name);
}
public boolean hasAttributeNS(String namespaceURI, String localName) {
return element().hasAttributeNS(namespaceURI, localName);
}
public Attr getAttributeNode(String name) {
log.debug("wrapping attribute");
return (Attr) wrap(element().getAttributeNode(name));
}
// I'm overriding this just for clarity. The base impl is correct.
public NodeList getElementsByTagName(String name) {
return super.getElementsByTagName(name);
}
public String getAttributeNS(String namespaceURI, String localName) {
return element().getAttributeNS(namespaceURI, localName);
}
public Attr getAttributeNodeNS(String namespaceURI, String localName) {
return (Attr) wrap(element().getAttributeNodeNS(namespaceURI, localName));
}
public NodeList getElementsByTagNameNS(String namespaceURI, String localName) {
return super.getElementsByTagNameNS(namespaceURI, localName);
}
// Unsupported mutators of Element
public void removeAttribute(String name) throws DOMException {
throw new UnsupportedOperationException();
}
public void removeAttributeNS(String namespaceURI, String localName) throws DOMException {
throw new UnsupportedOperationException();
}
public void setAttribute(String name, String value) throws DOMException {
throw new UnsupportedOperationException();
}
public Attr removeAttributeNode(Attr oldAttr) throws DOMException {
throw new UnsupportedOperationException();
}
public Attr setAttributeNode(Attr newAttr) throws DOMException {
throw new UnsupportedOperationException();
}
public Attr setAttributeNodeNS(Attr newAttr) throws DOMException {
throw new UnsupportedOperationException();
}
public void setAttributeNS(String namespaceURI, String qualifiedName, String value) throws DOMException {
throw new UnsupportedOperationException();
}
// end proxied Element methods
// unsupported DOM level 3 methods
public TypeInfo getSchemaTypeInfo() {
throw operationNotSupported();
}
public void setIdAttribute(String string, boolean b) throws DOMException {
throw operationNotSupported();
}
public void setIdAttributeNS(String string, String string1, boolean b) throws DOMException {
throw operationNotSupported();
}
public void setIdAttributeNode(Attr attr, boolean b) throws DOMException {
throw operationNotSupported();
}
// end DOM level 3 methods
public String toString() {
return "ProxyElement for: " + element();
}
}
|