| /* |
| * 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. |
| * |
| */ |
| 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). |
| * |
| * <p>Implementations should advance the ParsePosition to the last |
| * character that makes up the property reference. E.g. the |
| * default implementation would return <code>"foo"</code> for |
| * <code>${foo}</code> and advance the ParsePosition to the |
| * <code>}</code> character.</p> |
| * |
| * @param s the String to parse. |
| * @param pos the ParsePosition in use, the location is expected |
| * to be modified if a property reference has been found (and may |
| * even be modified if no reference has been found). |
| * @param parseNextProperty provides access to the Project and may |
| * be used to look up property values. |
| * @return property name if any, else <code>null</code>. |
| */ |
| String parsePropertyName(String s, ParsePosition pos, |
| ParseNextProperty parseNextProperty); |
| } |
| |