1 package org.codehaus.plexus.interpolation;
2
3 /*
4 * Copyright 2001-2008 Codehaus Foundation.
5 *
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18
19 /**
20 * Used to allow full recursion of value interpolation before applying some rule
21 * to the result.
22 */
23 public interface InterpolationPostProcessor {
24
25 /**
26 * Given the starting expression and the fully-recursively-interpolated value,
27 * perform some post-processing step and return the resulting [possibly different]
28 * value, or null if no change was made..
29 *
30 * @param expression the original expression
31 * @param value the original value after fully recursive interpolation of expression
32 * @return the processed value if a change was made; else return null
33 */
34 Object execute(String expression, Object value);
35 }