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Ant example source code file (

This example Ant source code file ( is included in the "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Ant tags/keywords

buildexception, buildexception, class, class, condition, isreference, isreference, no, object, object, projectcomponent, reference, string

The source code

 *  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
 *  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.



 * Condition that tests whether a given reference has been defined.
 * <p>Optionally tests whether it is of a given type/class.

* * @since Ant 1.6 */ public class IsReference extends ProjectComponent implements Condition { private Reference ref; private String type; /** * Set the refid attribute. * * @param r a Reference value */ public void setRefid(Reference r) { ref = r; } /** * Set the type attribute. This is optional attribute. * * @param type an ant component type name */ public void setType(String type) { this.type = type; } /** * @return true if the reference exists and if type is set, if * the reference is the same type * @exception BuildException if an error occurs */ public boolean eval() throws BuildException { if (ref == null) { throw new BuildException("No reference specified for isreference " + "condition"); } Object o = getProject().getReference(ref.getRefId()); if (o == null) { return false; } else if (type == null) { return true; } else { Class typeClass = (Class) getProject().getDataTypeDefinitions().get(type); if (typeClass == null) { typeClass = (Class) getProject().getTaskDefinitions().get(type); } if (typeClass == null) { // don't know the type, should throw exception instead? return false; } return typeClass.isAssignableFrom(o.getClass()); } } }

Other Ant examples (source code examples)

Here is a short list of links related to this Ant source code file:

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