| /* |
| * 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; |
| } |
| |
| } |