- /*
- * Copyright 2001-2004 The 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 property has been set.
- *
- * @since Ant 1.5
- * @version $Revision: 1.7.2.4 $
- */
- 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;
- }
-
- }