1 /****************************************************************
2 * Licensed to the Apache Software Foundation (ASF) under one *
3 * or more contributor license agreements. See the NOTICE file *
4 * distributed with this work for additional information *
5 * regarding copyright ownership. The ASF licenses this file *
6 * to you under the Apache License, Version 2.0 (the *
7 * "License"); you may not use this file except in compliance *
8 * with the License. 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, *
13 * software distributed under the License is distributed on an *
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY *
15 * KIND, either express or implied. See the License for the *
16 * specific language governing permissions and limitations *
17 * under the License. *
18 ****************************************************************/
19 package org.apache.james.container.spring.examples.configuration;
20
21 import org.apache.james.container.spring.configuration.ConfigurationInterceptor;
22 import org.apache.avalon.framework.configuration.Configuration;
23 import org.apache.avalon.framework.configuration.MutableConfiguration;
24
25 /**
26 * traverses over all configurations in the configuration tree
27 */
28 public abstract class TraversingConfigurationInterceptor implements ConfigurationInterceptor {
29 public Configuration intercept(Configuration configuration) {
30 interceptInternal(configuration);
31 return configuration;
32 }
33
34 private void interceptInternal(Configuration configuration) {
35 if (configuration instanceof MutableConfiguration) {
36 MutableConfiguration mutableConfiguration = (MutableConfiguration) configuration;
37 process(mutableConfiguration);
38 }
39
40 // go deep.
41 Configuration[] children = configuration.getChildren();
42 for (int i = 0; i < children.length; i++) {
43 Configuration childConfiguration = children[i];
44 interceptInternal(childConfiguration);
45 }
46 }
47
48 protected abstract void process(MutableConfiguration mutableConfiguration);
49 }