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/*
* Copyright 2002-2004 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.
*
*/
package org.apache.tools.ant.taskdefs.condition;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.ProjectComponent;
/**
* Condition that tests whether a given string evals to false
*
* @author Steve Loughran
* @since Ant 1.5
*/
public class IsFalse extends ProjectComponent implements Condition {
/**
* what we eval
*/
private Boolean value = null;
/**
* set the value to be tested; let ant eval it to true/false
* @param value the value to test
*/
public void setValue(boolean value) {
this.value = value ? Boolean.TRUE : Boolean.FALSE;
}
/**
* @return the inverted value;
* @throws BuildException if someone forgot to spec a value
*/
public boolean eval() throws BuildException {
if (value == null) {
throw new BuildException("Nothing to test for falsehood");
}
return !value.booleanValue();
}
}
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