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/*
 * Copyright 2007-2010 the original author or authors.
 * 
 * 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.impalaframework.build.ant;


/**
 * Task which which contains nested tasks, which will evaluate based on the
 * presence of a property, or whether the property evaluates to a particular
 * value.
 * 
 * 
 * In the following example, 'Hi Phil' will only be printed out if you don't have a property myname present
 * 
 * 
  <target name = "unlessproperty"
 *     description="If property test">
 *     <unlessproperty property = "myname">
 *        <echo>Hi Phil</echo>
 *     </unlessproperty>
 *  </target>
 * 
 * 
 * 
 * In the following example, 'Hi Phil' will only be printed out if you don't have a property myname with a value of 'phil'
 * 
 * 
  <target name = "unlessproperty"
 *     description="If property test">
 *     <unlessproperty property = "myname" equals = "phil">
 *        <echo>Hi Phil</echo>
 *     </unlessproperty>
 *  </target>
 * 
 * 
 * @author Phil Zoio
 */
public class UnlessPropertyTask extends ConditionalPropertyTask {
	
	@Override
	protected boolean shouldExecute(boolean isTrue) {
		return !isTrue;
	}	

}