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/*
* The Apache Software License, Version 1.1
*
* Copyright (c) 2002-2003 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Xalan" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation and was
* originally based on software copyright (c) 2002, International
* Business Machines Corporation., http://www.ibm.com. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.xpath.impl;
import org.apache.xml.QName;
import org.apache.xpath.XPath20Exception;
import org.apache.xpath.expression.Expr;
import org.apache.xpath.expression.Variable;
import org.apache.xpath.expression.Visitor;
import org.apache.xpath.impl.parser.Token;
import org.apache.xpath.impl.parser.XPath;
/**
* Default implementation of variable.
*/
public class VariableImpl extends ExprImpl implements Variable
{
/**
* Name of the variable
*/
QName m_varName;
/**
* Constructor for VariableImpl. Internal use only.
*
* @param i
*/
public VariableImpl(int i)
{
super(i);
}
/**
* Constructor for VariableImpl. Internal use only.
*
* @param p
* @param i
*/
public VariableImpl(XPath p, int i)
{
super(p, i);
}
/**
* Constructor for cloning.
*
* @param expr
*/
protected VariableImpl(VariableImpl expr)
{
super(expr.id);
m_varName = expr.m_varName;
}
/**
* @see org.apache.xpath.expression.Variable#getVariableName()
*/
public QName getVariableName()
{
return m_varName;
}
/* (non-Javadoc)
* @see org.apache.xpath.expression.Variable#setVariableName(java.lang.String)
*/
public void setVariableName(QName name) throws XPath20Exception {
// TODO: check the validity of the var name
m_varName = name;
}
/**
* @see org.apache.xpath.expression.Expr#getExprType()
*/
public short getExprType()
{
return VARIABLE_REF_EXPR;
}
/**
* @see org.apache.xpath.expression.Expr#cloneExpression()
*/
public Expr cloneExpression()
{
return new VariableImpl(this);
}
/**
* @see org.apache.xpath.expression.Visitable#visited(Visitor)
*/
public boolean visit(Visitor visitor)
{
visitor.visitVariable(this);
return false;
}
/**
* @see org.apache.xpath.impl.parser.SimpleNode#processToken(Token)
*/
public void processToken(Token token)
{
super.processToken(token);
m_varName = QName.valueOf(token.image.trim());
}
/**
* @see org.apache.xpath.impl.ExprImpl#getString(StringBuffer, boolean)
*/
public void getString(StringBuffer expr, boolean abbreviate)
{
expr.append('$').append(m_varName);
}
}