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 1999-2004 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: FunctionPattern.java,v 1.2.4.2 2005/09/15 00:21:15 jeffsuttor Exp $
   */
  package jaxp.sun.org.apache.xpath.internal.patterns;
  
  import jaxp.sun.org.apache.xml.internal.dtm.DTM;
  import jaxp.sun.org.apache.xml.internal.dtm.DTMIterator;
  import jaxp.sun.org.apache.xpath.internal.Expression;
  import jaxp.sun.org.apache.xpath.internal.ExpressionOwner;
  import jaxp.sun.org.apache.xpath.internal.XPathContext;
  import jaxp.sun.org.apache.xpath.internal.XPathVisitor;
  import jaxp.sun.org.apache.xpath.internal.objects.XNumber;
  import jaxp.sun.org.apache.xpath.internal.objects.XObject;
  import jaxp.sun.org.apache.xpath.internal.functions.Function;
  import jaxp.xml.transform.TransformerException;
  
  /**
   * Match pattern step that contains a function.
   * @xsl.usage advanced
   */
  public class FunctionPattern extends StepPattern
  {
      static final long serialVersionUID = -5426793413091209944L;
  
    /**
     * Construct a FunctionPattern from a
     * {@link Function expression}.
     *
     * NEEDSDOC @param expr
     */
    public FunctionPattern(Expression expr, int axis, int predaxis)
    {
  
      super(0, null, null, axis, predaxis);
  
      m_functionExpr = expr;
    }
  
    /**
     * Static calc of match score.
     */
    public final void calcScore()
    {
  
      m_score = SCORE_OTHER;
  
      if (null == m_targetString)
        calcTargetString();
    }
  
    /**
     * Should be a {@link Function expression}.
     *  @serial
     */
    Expression m_functionExpr;
  
    /**
     * This function is used to fixup variables from QNames to stack frame
     * indexes at stylesheet build time.
     * @param vars List of QNames that correspond to variables.  This list
     * should be searched backwards for the first qualified name that
     * corresponds to the variable reference qname.  The position of the
     * QName in the vector from the start of the vector will be its position
     * in the stack frame (but variables above the globalsTop value will need
     * to be offset to the current stack frame).
     */
    public void fixupVariables(java.util.Vector vars, int globalsSize)
    {
      super.fixupVariables(vars, globalsSize);
      m_functionExpr.fixupVariables(vars, globalsSize);
    }
  
  
    /**
     * Test a node to see if it matches the given node test.
     *
     * @param xctxt XPath runtime context.
     *
     * @return {@link NodeTest#SCORE_NODETEST},
     *         {@link NodeTest#SCORE_NONE},
     *         {@link NodeTest#SCORE_NSWILD},
     *         {@link NodeTest#SCORE_QNAME}, or
     *         {@link NodeTest#SCORE_OTHER}.
     *
     * @throws TransformerException
     */
    public XObject execute(XPathContext xctxt, int context)
            throws TransformerException
    {
  
      DTMIterator nl = m_functionExpr.asIterator(xctxt, context);
      XNumber score = SCORE_NONE;
  
      if (null != nl)
      {
        int n;
  
        while (DTM.NULL != (n = nl.nextNode()))
        {
          score = (n == context) ? SCORE_OTHER : SCORE_NONE;
  
          if (score == SCORE_OTHER)
          {
            context = n;
  
            break;
          }
        }
  
        // nl.detach();
      }
      nl.detach();
  
      return score;
    }
  
    /**
     * Test a node to see if it matches the given node test.
     *
     * @param xctxt XPath runtime context.
     *
     * @return {@link NodeTest#SCORE_NODETEST},
     *         {@link NodeTest#SCORE_NONE},
     *         {@link NodeTest#SCORE_NSWILD},
     *         {@link NodeTest#SCORE_QNAME}, or
     *         {@link NodeTest#SCORE_OTHER}.
     *
     * @throws TransformerException
     */
    public XObject execute(XPathContext xctxt, int context,
                           DTM dtm, int expType)
            throws TransformerException
    {
  
      DTMIterator nl = m_functionExpr.asIterator(xctxt, context);
      XNumber score = SCORE_NONE;
  
      if (null != nl)
      {
        int n;
  
        while (DTM.NULL != (n = nl.nextNode()))
        {
          score = (n == context) ? SCORE_OTHER : SCORE_NONE;
  
          if (score == SCORE_OTHER)
          {
            context = n;
  
            break;
          }
        }
  
        nl.detach();
      }
  
      return score;
    }
  
    /**
     * Test a node to see if it matches the given node test.
     *
     * @param xctxt XPath runtime context.
     *
     * @return {@link NodeTest#SCORE_NODETEST},
     *         {@link NodeTest#SCORE_NONE},
     *         {@link NodeTest#SCORE_NSWILD},
     *         {@link NodeTest#SCORE_QNAME}, or
     *         {@link NodeTest#SCORE_OTHER}.
     *
     * @throws TransformerException
     */
    public XObject execute(XPathContext xctxt)
            throws TransformerException
    {
  
      int context = xctxt.getCurrentNode();
      DTMIterator nl = m_functionExpr.asIterator(xctxt, context);
      XNumber score = SCORE_NONE;
  
      if (null != nl)
      {
        int n;
  
        while (DTM.NULL != (n = nl.nextNode()))
        {
          score = (n == context) ? SCORE_OTHER : SCORE_NONE;
  
          if (score == SCORE_OTHER)
          {
            context = n;
  
            break;
          }
        }
  
        nl.detach();
      }
  
      return score;
    }
  
    class FunctionOwner implements ExpressionOwner
    {
      /**
       * @see ExpressionOwner#getExpression()
       */
      public Expression getExpression()
      {
        return m_functionExpr;
      }
  
  
      /**
       * @see ExpressionOwner#setExpression(Expression)
       */
      public void setExpression(Expression exp)
      {
          exp.exprSetParent(FunctionPattern.this);
          m_functionExpr = exp;
      }
    }
  
    /**
     * Call the visitor for the function.
     */
    protected void callSubtreeVisitors(XPathVisitor visitor)
    {
      m_functionExpr.callVisitors(new FunctionOwner(), visitor);
      super.callSubtreeVisitors(visitor);
    }
  
  }
  