content: /*
   *  This file is part of AndroidIDE.
   *
   *  AndroidIDE 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 3 of the License, or
   *  (at your option) any later version.
   *
   *  AndroidIDE 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 AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
   */
  
  /*
   * reserved comment block
   * DO NOT REMOVE OR ALTER!
   */
  /*
   * Copyright 2002-2005 The Apache Software Foundation.
   *
   * Licensed 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.
   */
  /*
   * $Id: XPathExpressionImpl.java,v 1.2.4.1 2005/09/10 04:06:55 jeffsuttor Exp $
   */
  
  
  package jaxp.sun.org.apache.xpath.internal.domapi;
  
  import jaxp.xml.transform.TransformerException;
  
  import jaxp.sun.org.apache.xpath.internal.XPath;
  import jaxp.sun.org.apache.xpath.internal.XPathContext;
  import jaxp.sun.org.apache.xpath.internal.objects.XObject;
  import jaxp.sun.org.apache.xpath.internal.res.XPATHErrorResources;
  import jaxp.sun.org.apache.xpath.internal.res.XPATHMessages;
  import org.w3c.dom.DOMException;
  import org.w3c.dom.Document;
  import org.w3c.dom.Node;
  import org.w3c.dom.xpath.XPathException;
  import org.w3c.dom.xpath.XPathExpression;
  import org.w3c.dom.xpath.XPathNamespace;
  
  /**
   *
   * The class provides an implementation of XPathExpression according
   * to the DOM L3 XPath Specification, Working Group Note 26 February 2004.
   *
   * <p>See also the <a href='http://www.w3.org/TR/2004/NOTE-DOM-Level-3-XPath-20040226'>Document Object Model (DOM) Level 3 XPath Specification</a>.</p>
   *
   * <p>The <code>XPathExpression</code> interface represents a parsed and resolved
   * XPath expression.</p>
   *
   * @see org.w3c.dom.xpath.XPathExpression
   *
   * @xsl.usage internal
   */
  class XPathExpressionImpl implements XPathExpression {
  
    /**
     * The xpath object that this expression wraps
     */
    final private XPath m_xpath;
  
    /**
     * The document to be searched to parallel the case where the XPathEvaluator
     * is obtained by casting a Document.
     */
    final private Document m_doc;
  
      /**
       * Constructor for XPathExpressionImpl.
       *
       * @param xpath The wrapped XPath object.
       * @param doc The document to be searched, to parallel the case where''
       *            the XPathEvaluator is obtained by casting the document.
       */
      XPathExpressionImpl(XPath xpath, Document doc) {
          m_xpath = xpath;
          m_doc = doc;
      }
  
      /**
       *
       * This method provides an implementation XPathResult.evaluate according
       * to the DOM L3 XPath Specification, Working Group Note 26 February 2004.
       *
       * <p>See also the <a href='http://www.w3.org/TR/2004/NOTE-DOM-Level-3-XPath-20040226'>Document Object Model (DOM) Level 3 XPath Specification</a>.</p>
       *
       * <p>Evaluates this XPath expression and returns a result.</p>
       * @param contextNode The <code>context</code> is context node for the
       *   evaluation of this XPath expression.If the XPathEvaluator was
       *   obtained by casting the <code>Document</code> then this must be
       *   owned by the same document and must be a <code>Document</code>,
       *   <code>Element</code>, <code>Attribute</code>, <code>Text</code>,
       *   <code>CDATASection</code>, <code>Comment</code>,
       *   <code>ProcessingInstruction</code>, or <code>XPathNamespace</code>
       *   node.If the context node is a <code>Text</code> or a
       *   <code>CDATASection</code>, then the context is interpreted as the
       *   whole logical text node as seen by XPath, unless the node is empty
       *   in which case it may not serve as the XPath context.
       * @param type If a specific <code>type</code> is specified, then the
       *   result will be coerced to return the specified type relying on
       *   XPath conversions and fail if the desired coercion is not possible.
       *   This must be one of the type codes of <code>XPathResult</code>.
      *  @param result The <code>result</code> specifies a specific result
       *   object which may be reused and returned by this method. If this is
       *   specified as <code>null</code>or the implementation does not reuse
       *   the specified result, a new result object will be constructed and
       *   returned.For XPath 1.0 results, this object will be of type
       *   <code>XPathResult</code>.
       * @return The result of the evaluation of the XPath expression.For XPath
       *   1.0 results, this object will be of type <code>XPathResult</code>.
       * @exception XPathException
       *   TYPE_ERR: Raised if the result cannot be converted to return the
       *   specified type.
       * @exception DOMException
       *   WRONG_DOCUMENT_ERR: The Node is from a document that is not supported
       *   by the XPathEvaluator that created this
       *   <code>XPathExpression</code>.
       *   <br>NOT_SUPPORTED_ERR: The Node is not a type permitted as an XPath
       *   context node.
       *
       * @see org.w3c.dom.xpath.XPathExpression#evaluate(Node, short, XPathResult)
       * @xsl.usage internal
       */
      public Object evaluate(
          Node contextNode,
          short type,
          Object result)
          throws XPathException, DOMException {
  
          // If the XPathEvaluator was determined by "casting" the document
          if (m_doc != null) {
  
              // Check that the context node is owned by the same document
              if ((contextNode != m_doc) && (!contextNode.getOwnerDocument().equals(m_doc))) {
                  String fmsg = XPATHMessages.createXPATHMessage(XPATHErrorResources.ER_WRONG_DOCUMENT, null);
                  throw new DOMException(DOMException.WRONG_DOCUMENT_ERR, fmsg);
              }
  
              // Check that the context node is an acceptable node type
              short nodeType = contextNode.getNodeType();
              if ((nodeType != Document.DOCUMENT_NODE) &&
                  (nodeType != Document.ELEMENT_NODE) &&
                  (nodeType != Document.ATTRIBUTE_NODE) &&
                  (nodeType != Document.TEXT_NODE) &&
                  (nodeType != Document.CDATA_SECTION_NODE) &&
                  (nodeType != Document.COMMENT_NODE) &&
                  (nodeType != Document.PROCESSING_INSTRUCTION_NODE) &&
                  (nodeType != XPathNamespace.XPATH_NAMESPACE_NODE)) {
                      String fmsg = XPATHMessages.createXPATHMessage(XPATHErrorResources.ER_WRONG_NODETYPE, null);
                      throw new DOMException(DOMException.NOT_SUPPORTED_ERR, fmsg);
              }
          }
  
          //
          // If the type is not a supported type, throw an exception and be
          // done with it!
          if (!XPathResultImpl.isValidType(type)) {
              String fmsg = XPATHMessages.createXPATHMessage(XPATHErrorResources.ER_INVALID_XPATH_TYPE, new Object[] {new Integer(type)});
              throw new XPathException(XPathException.TYPE_ERR,fmsg); // Invalid XPath type argument: {0}
          }
  
          // Cache xpath context?
          XPathContext xpathSupport = new XPathContext();
  
          // if m_document is not null, build the DTM from the document
          if (null != m_doc) {
              xpathSupport.getDTMHandleFromNode(m_doc);
          }
  
          XObject xobj = null;
          try {
              xobj = m_xpath.execute(xpathSupport, contextNode, null);
          } catch (TransformerException te) {
              // What should we do here?
              throw new XPathException(XPathException.INVALID_EXPRESSION_ERR,te.getMessageAndLocation());
          }
  
          // Create a new XPathResult object
          // Reuse result object passed in?
          // The constructor will check the compatibility of type and xobj and
          // throw an exception if they are not compatible.
          return new XPathResultImpl(type,xobj,contextNode, m_xpath);
      }
  
  }
  