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    1   /*
    2    * $Id: ProxyNodeAdapter.java 471756 2006-11-06 15:01:43Z husted $
    3    *
    4    * Licensed to the Apache Software Foundation (ASF) under one
    5    * or more contributor license agreements.  See the NOTICE file
    6    * distributed with this work for additional information
    7    * regarding copyright ownership.  The ASF licenses this file
    8    * to you under the Apache License, Version 2.0 (the
    9    * "License"); you may not use this file except in compliance
    10   * with the License.  You may obtain a copy of the License at
    11   *
    12   *  http://www.apache.org/licenses/LICENSE-2.0
    13   *
    14   * Unless required by applicable law or agreed to in writing,
    15   * software distributed under the License is distributed on an
    16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    17   * KIND, either express or implied.  See the License for the
    18   * specific language governing permissions and limitations
    19   * under the License.
    20   */
    21  package org.apache.struts2.views.xslt;
    22
    23  import org.apache.commons.logging.Log;
    24  import org.apache.commons.logging.LogFactory;
    25  import org.w3c.dom.DOMException;
    26  import org.w3c.dom.NamedNodeMap;
    27  import org.w3c.dom.Node;
    28
    29  /***
    30   * ProxyNodeAdapter is a read-only delegating adapter for objects which already
    31   * implement the Node interface.  All methods are proxied to the underlying
    32   * Node except getParent(), getNextSibling() and getPreviousSibling(), which
    33   * are implemented by the abstract adapter node to work with the parent adapter.
    34   */
    35  public abstract class ProxyNodeAdapter extends AbstractAdapterNode {
    36
    37      private Log log = LogFactory.getLog(this.getClass());
    38
    39      public ProxyNodeAdapter(AdapterFactory factory, AdapterNode parent, Node value) {
    40          setContext(factory, parent, "document"/*propname unused*/, value);
    41          log.debug("proxied node is: " + value);
    42          log.debug("node class is: " + value.getClass());
    43          log.debug("node type is: " + value.getNodeType());
    44          log.debug("node name is: " + value.getNodeName());
    45      }
    46
    47      /***
    48       * Get the proxied Node value
    49       */
    50      protected Node node() {
    51          return (Node) getPropertyValue();
    52      }
    53
    54      /***
    55       * Get and adapter to wrap the proxied node.
    56       *
    57       * @param node
    58       */
    59      protected Node wrap(Node node) {
    60          return getAdapterFactory().proxyNode(this, node);
    61      }
    62
    63      protected NamedNodeMap wrap(NamedNodeMap nnm) {
    64          return getAdapterFactory().proxyNamedNodeMap(this, nnm);
    65      }
    66      //protected NodeList wrap( NodeList nl ) { }
    67
    68      //protected Node unwrap( Node child ) {
    69      //  return ((ProxyNodeAdapter)child).node();
    70      //}
    71
    72      // Proxied Node methods
    73
    74      public String getNodeName() {
    75          log.trace("getNodeName");
    76          return node().getNodeName();
    77      }
    78
    79      public String getNodeValue() throws DOMException {
    80          log.trace("getNodeValue");
    81          return node().getNodeValue();
    82      }
    83
    84      public short getNodeType() {
    85          if (log.isTraceEnabled())
    86              log.trace("getNodeType: " + getNodeName() + ": " + node().getNodeType());
    87          return node().getNodeType();
    88      }
    89
    90      public NamedNodeMap getAttributes() {
    91          NamedNodeMap nnm = wrap(node().getAttributes());
    92          if (log.isTraceEnabled())
    93              log.trace("getAttributes: " + nnm);
    94          return nnm;
    95      }
    96
    97      public boolean hasChildNodes() {
    98          log.trace("hasChildNodes");
    99          return node().hasChildNodes();
    100     }
    101
    102     public boolean isSupported(String s, String s1) {
    103         log.trace("isSupported");
    104         // Is this ok?  What kind of features are they asking about?
    105         return node().isSupported(s, s1);
    106     }
    107
    108     public String getNamespaceURI() {
    109         log.trace("getNamespaceURI");
    110         return node().getNamespaceURI();
    111     }
    112
    113     public String getPrefix() {
    114         log.trace("getPrefix");
    115         return node().getPrefix();
    116     }
    117
    118     public String getLocalName() {
    119         log.trace("getLocalName");
    120         return node().getLocalName();
    121     }
    122
    123     public boolean hasAttributes() {
    124         log.trace("hasAttributes");
    125         return node().hasAttributes();
    126     }
    127
    128     // End proxied Node methods
    129
    130     public String toString() {
    131         return "ProxyNode for: " + node();
    132     }
    133 }
    134