/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program 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 Lesser General Public License for more details.
*
* Copyright (c) 2006 - 2013 Pentaho Corporation and Contributors. All rights reserved.
*/
package org.pentaho.reporting.libraries.formula.lvalues;
import org.pentaho.reporting.libraries.formula.EvaluationException;
import org.pentaho.reporting.libraries.formula.operators.PostfixOperator;
/**
* Creation-Date: 02.11.2006, 10:20:27
*
* @author Thomas Morgner
*/
public class PostfixTerm extends AbstractLValue {
private PostfixOperator operator;
private LValue value;
private static final long serialVersionUID = -3652663226326546952L;
public PostfixTerm( final LValue value, final PostfixOperator operator ) {
if ( operator == null ) {
throw new NullPointerException();
}
if ( value == null ) {
throw new NullPointerException();
}
this.operator = operator;
this.value = value;
}
public PostfixOperator getOperator() {
return operator;
}
public LValue getValue() {
return value;
}
public TypeValuePair evaluate() throws EvaluationException {
return operator.evaluate( getContext(), value.evaluate() );
}
public String toString() {
return String.valueOf( value ) + operator;
}
/**
* Checks whether the LValue is constant. Constant lvalues always return the same value.
*
* @return
*/
public boolean isConstant() {
return value.isConstant();
}
/**
* Returns any dependent lvalues (parameters and operands, mostly).
*
* @return
*/
public LValue[] getChildValues() {
return new LValue[] { value };
}
public Object clone() throws CloneNotSupportedException {
final PostfixTerm o = (PostfixTerm) super.clone();
o.value = (LValue) value.clone();
return o;
}
}