Struts example source code file (ProxyNodeAdapter.java)

This example Struts source code file (ProxyNodeAdapter.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Struts tags/keywords

abstractadapternode, adapternode, dom, domexception, logger, namednodemap, namednodemap, node, node, proxynode, proxynodeadapter, proxynodeadapter, string, string

The Struts ProxyNodeAdapter.java source code

/*
 * $Id: ProxyNodeAdapter.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 org.w3c.dom.DOMException;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;

import com.opensymphony.xwork2.util.logging.Logger;
import com.opensymphony.xwork2.util.logging.LoggerFactory;

/**
 * ProxyNodeAdapter is a read-only delegating adapter for objects which already
 * implement the Node 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.
 */
public abstract class ProxyNodeAdapter extends AbstractAdapterNode {

    private Logger log = LoggerFactory.getLogger(this.getClass());

    public ProxyNodeAdapter(AdapterFactory factory, AdapterNode parent, Node value) {
        setContext(factory, parent, "document"/*propname unused*/, value);
        log.debug("proxied node is: " + value);
        log.debug("node class is: " + value.getClass());
        log.debug("node type is: " + value.getNodeType());
        log.debug("node name is: " + value.getNodeName());
    }

    /**
     * Get the proxied Node value
     */
    protected Node node() {
        return (Node) getPropertyValue();
    }

    /**
     * Get and adapter to wrap the proxied node.
     *
     * @param node
     */
    protected Node wrap(Node node) {
        return getAdapterFactory().proxyNode(this, node);
    }

    protected NamedNodeMap wrap(NamedNodeMap nnm) {
        return getAdapterFactory().proxyNamedNodeMap(this, nnm);
    }
    //protected NodeList wrap( NodeList nl ) { }

    //protected Node unwrap( Node child ) {
    //  return ((ProxyNodeAdapter)child).node();
    //}

    // Proxied Node methods

    public String getNodeName() {
        log.trace("getNodeName");
        return node().getNodeName();
    }

    public String getNodeValue() throws DOMException {
        log.trace("getNodeValue");
        return node().getNodeValue();
    }

    public short getNodeType() {
        if (log.isTraceEnabled())
            log.trace("getNodeType: " + getNodeName() + ": " + node().getNodeType());
        return node().getNodeType();
    }

    public NamedNodeMap getAttributes() {
        NamedNodeMap nnm = wrap(node().getAttributes());
        if (log.isTraceEnabled())
            log.trace("getAttributes: " + nnm);
        return nnm;
    }

    public boolean hasChildNodes() {
        log.trace("hasChildNodes");
        return node().hasChildNodes();
    }

    public boolean isSupported(String s, String s1) {
        log.trace("isSupported");
        // Is this ok?  What kind of features are they asking about?
        return node().isSupported(s, s1);
    }

    public String getNamespaceURI() {
        log.trace("getNamespaceURI");
        return node().getNamespaceURI();
    }

    public String getPrefix() {
        log.trace("getPrefix");
        return node().getPrefix();
    }

    public String getLocalName() {
        log.trace("getLocalName");
        return node().getLocalName();
    }

    public boolean hasAttributes() {
        log.trace("hasAttributes");
        return node().hasAttributes();
    }

    // End proxied Node methods

    public String toString() {
        return "ProxyNode for: " + node();
    }
}