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: UnaryOperation.java,v 1.2.4.1 2005/09/14 21:31:44 jeffsuttor Exp $
   */
  package jaxp.sun.org.apache.xpath.internal.operations;
  
  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.XObject;
  import jaxp.sun.org.apache.xpath.internal.XPathVisitable;
  import jaxp.xml.transform.TransformerException;
  
  /**
   * The unary operation base class.
   */
  public abstract class UnaryOperation extends Expression implements ExpressionOwner
  {
      static final long serialVersionUID = 6536083808424286166L;
  
    /** The operand for the operation.
     *  @serial */
    protected Expression m_right;
  
    /**
     * 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)
    {
      m_right.fixupVariables(vars, globalsSize);
    }
  
    /**
     * Tell if this expression or it's subexpressions can traverse outside
     * the current subtree.
     *
     * @return true if traversal outside the context node's subtree can occur.
     */
    public boolean canTraverseOutsideSubtree()
    {
  
      if (null != m_right && m_right.canTraverseOutsideSubtree())
        return true;
  
      return false;
    }
  
    /**
     * Set the expression operand for the operation.
     *
     *
     * @param r The expression operand to which the unary operation will be
     *          applied.
     */
    public void setRight(Expression r)
    {
      m_right = r;
      r.exprSetParent(this);
    }
  
    /**
     * Execute the operand and apply the unary operation to the result.
     *
     *
     * @param xctxt The runtime execution context.
     *
     * @return An XObject that represents the result of applying the unary
     *         operation to the evaluated operand.
     *
     * @throws TransformerException
     */
    public XObject execute(XPathContext xctxt) throws TransformerException
    {
  
      return operate(m_right.execute(xctxt));
    }
  
    /**
     * Apply the operation to two operands, and return the result.
     *
     *
     * @param right non-null reference to the evaluated right operand.
     *
     * @return non-null reference to the XObject that represents the result of the operation.
     *
     * @throws TransformerException
     */
    public abstract XObject operate(XObject right)
      throws TransformerException;
  
    /** @return the operand of unary operation, as an Expression.
     */
    public Expression getOperand(){
      return m_right;
    }
  
    /**
     * @see XPathVisitable#callVisitors(ExpressionOwner, XPathVisitor)
     */
    public void callVisitors(ExpressionOwner owner, XPathVisitor visitor)
    {
          if(visitor.visitUnaryOperation(owner, this))
          {
                  m_right.callVisitors(this, visitor);
          }
    }
  
  
    /**
     * @see ExpressionOwner#getExpression()
     */
    public Expression getExpression()
    {
      return m_right;
    }
  
    /**
     * @see ExpressionOwner#setExpression(Expression)
     */
    public void setExpression(Expression exp)
    {
          exp.exprSetParent(this);
          m_right = exp;
    }
  
    /**
     * @see Expression#deepEquals(Expression)
     */
    public boolean deepEquals(Expression expr)
    {
          if(!isSameClass(expr))
                  return false;
  
          if(!m_right.deepEquals(((UnaryOperation)expr).m_right))
                  return false;
  
          return true;
    }
  
  
  }
  