/* * 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.property; import java.text.ParsePosition; import org.apache.tools.ant.PropertyHelper; /** * Responsible for locating a property reference inside a String. * @since Ant 1.8.0 */ public interface PropertyExpander extends PropertyHelper.Delegate { /** * Determine whether there is a property reference at the current * ParsePosition and return its name (or null if there is none). * *
Implementations should advance the ParsePosition to the last
* character that makes up the property reference. E.g. the
* default implementation would return "foo"
for
* ${foo}
and advance the ParsePosition to the
* }
character.
null
.
*/
String parsePropertyName(String s, ParsePosition pos,
ParseNextProperty parseNextProperty);
}