1 package org.codehaus.mojo.jaxb2.shared.environment.classloading;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import org.apache.maven.plugin.logging.Log;
23 import org.codehaus.mojo.jaxb2.shared.Validate;
24 import org.codehaus.mojo.jaxb2.shared.environment.AbstractLogAwareFacet;
25
26 /**
27 * Adapter converting a ThreadContextClassLoaderHolder to the standard lifecycle
28 * defined within the EnvironmentFacet.
29 *
30 * @author <a href="mailto:lj@jguru.se">Lennart Jörelid</a>, jGuru Europe AB
31 */
32 public class ContextClassLoaderEnvironmentFacet extends AbstractLogAwareFacet {
33
34 // Internal state
35 private ThreadContextClassLoaderBuilder builder;
36 private ThreadContextClassLoaderHolder holder;
37
38 /**
39 * Compound constructor creating a ContextClassLoaderEnvironmentFacet wrapping the supplied data.
40 *
41 * @param log The active Maven Log.
42 * @param builder A fully set up ThreadContextClassLoaderBuilder, where the {@code buildAndSet()} method
43 * should <strong>not</strong> be invoked yet.
44 * @see ThreadContextClassLoaderBuilder
45 */
46 public ContextClassLoaderEnvironmentFacet(final Log log,
47 final ThreadContextClassLoaderBuilder builder) {
48 super(log);
49
50 // Check sanity
51 Validate.notNull(builder, "builder");
52
53 // Assign internal state
54 this.builder = builder;
55 }
56
57 /**
58 * Delegate method retrieving the classpath as argument from the underlying ThreadContextClassLoaderHolder.
59 * Note that the setup method must be invoked before this one is.
60 *
61 * @return the ClassPath as an argument to external processes such as XJC.
62 */
63 public String getClassPathAsArgument() {
64
65 // Check sanity
66 Validate.notNull(holder, "holder");
67
68 // Delegate and return
69 return holder.getClassPathAsArgument();
70 }
71
72 /**
73 * {@inheritDoc}
74 */
75 @Override
76 public void setup() {
77 this.holder = builder.buildAndSet();
78 }
79
80 /**
81 * {@inheritDoc}
82 */
83 @Override
84 public void restore() {
85 holder.restoreClassLoaderAndReleaseThread();
86 }
87 }