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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 property has been set.
*
* @since Ant 1.5
*/
public class IsSet extends ProjectComponent implements Condition {
private String property;
/**
* Set the property attribute
*
* @param p the property name
*/
public void setProperty(String p) {
property = p;
}
/**
* @return true if the property exists
* @exception BuildException if the property attribute is not set
*/
public boolean eval() throws BuildException {
if (property == null) {
throw new BuildException("No property specified for isset " + "condition");
}
return getProject().getProperty(property) != null;
}
}
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