/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source 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 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.jsp.el;
import javax.el.*;
abstract public class AbstractValueExpression extends ValueExpression
{
public boolean isReadOnly(ELContext env)
{
env.setPropertyResolved(true);
return true;
}
public boolean isLiteralText()
{
return false;
}
public Class getType(ELContext env)
{
Object value = getValue(env);
if (env.isPropertyResolved())
return value.getClass();
else
return null;
}
public Class getExpectedType()
{
return Object.class;
}
public void setValue(ELContext env, Object value)
{
throw new PropertyNotWritableException(getClass().getName());
}
public int hashCode()
{
return getExpressionString().hashCode();
}
public boolean equals(Object o)
{
return (this == o);
}
public String toString()
{
return getExpressionString();
}
}