src/tests/antunit/propertyhelpers.xml

<?xml version="1.0"?>
<!--
  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

      https://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.
-->
<project>
  <import file="antunit-base.xml"/>

  <target name="compileHelpers">
    <mkdir dir="${input}/org/apache/ant/propertyhelper"/>
    <mkdir dir="${output}/org/apache/ant/propertyhelper"/>

    <echo file="${input}/org/apache/ant/propertyhelper/URLHelper.java"><![CDATA[
package org.apache.ant.propertyhelper;

import org.apache.tools.ant.PropertyHelper;
import org.apache.tools.ant.types.resources.URLResource;

public class URLHelper implements PropertyHelper.PropertyEvaluator {
    private String prefix = "url:";
    public Object evaluate(String property, PropertyHelper propertyHelper) {
        if (property.startsWith(prefix)) {
            String s = property.substring(prefix.length());
            return new URLResource(s);
        }
        return null;
    }
}
]]></echo>
    <echo file="${input}/org/apache/ant/propertyhelper/JavaHelper.java"><![CDATA[
package org.apache.ant.propertyhelper;

import java.io.File;
import org.apache.tools.ant.ProjectComponent;
import org.apache.tools.ant.PropertyHelper;
import org.apache.tools.ant.types.Path;
import org.apache.tools.ant.types.resources.JavaResource;

public class JavaHelper extends ProjectComponent
    implements PropertyHelper.PropertyEvaluator {

    private String prefix = "java:";
    public Object evaluate(String property, PropertyHelper propertyHelper) {
        if (property.startsWith(prefix)) {
            String s = property.substring(prefix.length());
            int index = s.indexOf("!");

            Path p = new Path(getProject());
            p.setPath(s.substring(0, index));

            JavaResource r = new JavaResource(s.substring(index + 1), p);
            r.setProject(getProject());
            return r;
        }
        return null;
    }
}
]]></echo>
    <javac srcdir="${input}" destdir="${output}"/>
  </target>

  <target name="defineHelpers" depends="compileHelpers">
    <componentdef name="urlhelper"
             classname="org.apache.ant.propertyhelper.URLHelper">
      <classpath location="${output}"/>
    </componentdef>
    <componentdef name="javahelper"
             classname="org.apache.ant.propertyhelper.JavaHelper">
      <classpath location="${output}"/>
    </componentdef>
    <propertyhelper>
      <urlhelper/>
      <javahelper/>
    </propertyhelper>
  </target>
</project>