org.navimatrix.jaxen.expr.DefaultAndExpr Maven / Gradle / Ivy
/*
* $Header: /cvs/jaxen/jaxen/src/java/main/org/jaxen/expr/DefaultAndExpr.java,v 1.15 2006/06/03 20:52:26 elharo Exp $
* $Revision: 1.15 $
* $Date: 2006/06/03 20:52:26 $
*
* ====================================================================
*
* Copyright 2000-2002 bob mcwhirter & James Strachan.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * 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.
*
* * Neither the name of the Jaxen Project nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS 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 COPYRIGHT OWNER
* OR 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 Jaxen Project and was originally
* created by bob mcwhirter and
* James Strachan . For more information on the
* Jaxen Project, please see .
*
* $Id: DefaultAndExpr.java,v 1.15 2006/06/03 20:52:26 elharo Exp $
*/
package org.navimatrix.jaxen.expr;
import org.navimatrix.jaxen.Context;
import org.navimatrix.jaxen.JaxenException;
import org.navimatrix.jaxen.Navigator;
import org.navimatrix.jaxen.function.BooleanFunction;
class DefaultAndExpr extends DefaultLogicalExpr
{
/**
*
*/
private static final long serialVersionUID = -5237984010263103742L;
DefaultAndExpr(Expr lhs,
Expr rhs)
{
super( lhs,
rhs );
}
public String getOperator()
{
return "and";
}
public String toString()
{
return "[(DefaultAndExpr): " + getLHS() + ", " + getRHS() + "]";
}
public Object evaluate(Context context) throws JaxenException
{
Navigator nav = context.getNavigator();
Boolean lhsValue = BooleanFunction.evaluate( getLHS().evaluate( context ), nav );
if ( !lhsValue.booleanValue() )
{
return Boolean.FALSE;
}
// Short circuits are required in XPath. "The right operand is not
// evaluated if the left operand evaluates to false."
Boolean rhsValue = BooleanFunction.evaluate( getRHS().evaluate( context ), nav );
if ( !rhsValue.booleanValue() )
{
return Boolean.FALSE;
}
return Boolean.TRUE;
}
public void accept(Visitor visitor)
{
visitor.visit(this);
}
}
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