1 /*
2 * ModeShape (http://www.modeshape.org)
3 * See the COPYRIGHT.txt file distributed with this work for information
4 * regarding copyright ownership. Some portions may be licensed
5 * to Red Hat, Inc. under one or more contributor license agreements.
6 * See the AUTHORS.txt file in the distribution for a full listing of
7 * individual contributors.
8 *
9 * ModeShape is free software. Unless otherwise indicated, all code in ModeShape
10 * is licensed to you under the terms of the GNU Lesser General Public License as
11 * published by the Free Software Foundation; either version 2.1 of
12 * the License, or (at your option) any later version.
13 *
14 * ModeShape is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this software; if not, write to the Free
21 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
22 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
23 */
24 package org.modeshape.sequencer.classfile;
25
26 import java.io.InputStream;
27 import net.jcip.annotations.ThreadSafe;
28 import org.modeshape.graph.sequencer.SequencerOutput;
29 import org.modeshape.graph.sequencer.StreamSequencer;
30 import org.modeshape.graph.sequencer.StreamSequencerContext;
31 import org.modeshape.sequencer.classfile.metadata.ClassFileMetadataReader;
32 import org.modeshape.sequencer.classfile.metadata.ClassMetadata;
33
34 @ThreadSafe
35 public class ClassFileSequencer implements StreamSequencer {
36
37 private static final ClassFileRecorder DEFAULT_CLASS_FILE_RECORDER = new DefaultClassFileRecorder();
38
39 private ClassFileRecorder classFileRecorder = DEFAULT_CLASS_FILE_RECORDER;
40
41 public void sequence( InputStream stream,
42 SequencerOutput output,
43 StreamSequencerContext context ) {
44
45 try {
46 ClassMetadata classMetadata = ClassFileMetadataReader.instance(stream);
47
48 classFileRecorder.recordClass(context, output, classMetadata);
49 } catch (Exception ex) {
50 context.getLogger(getClass()).error(ex, ClassFileSequencerI18n.errorSequencingClass, context.getInputPath());
51 }
52 }
53
54 /**
55 * Sets the custom {@link ClassFileRecorder} by specifying a class name. This method attempts to instantiate an instance of
56 * the custom {@link ClassFileRecorder} class prior to ensure that the new value represents a valid implementation.
57 *
58 * @param classFileRecorderClassName the fully-qualified class name of the new custom class file recorder implementation; null
59 * indicates that {@link DefaultClassFileRecorder the default class file recorder} should be used.
60 * @throws ClassNotFoundException if the the class for the {@code ClassFileRecorder} implementation cannot be located
61 * @throws IllegalAccessException if the row factory class or its nullary constructor is not accessible.
62 * @throws InstantiationException if the row factory represents an abstract class, an interface, an array class, a primitive
63 * type, or void; or if the class has no nullary constructor; or if the instantiation fails for some other reason.
64 * @throws ClassCastException if the instantiated class file recorder does not implement the {@link ClassFileRecorder}
65 * interface
66 */
67 public void setClassFileRecorderClassName( String classFileRecorderClassName )
68 throws ClassNotFoundException, IllegalAccessException, InstantiationException {
69
70 if (classFileRecorderClassName == null) {
71 this.classFileRecorder = DEFAULT_CLASS_FILE_RECORDER;
72 return;
73 }
74
75 Class<?> classFileRecorderClass = Class.forName(classFileRecorderClassName);
76 this.classFileRecorder = (ClassFileRecorder)classFileRecorderClass.newInstance();
77 }
78
79 /**
80 * Sets a custom {@link ClassFileRecorder}. If {@code classFileRecorder} is null, then the {@link DefaultClassFileRecorder
81 * default class file recorder} will be used.
82 *
83 * @param classFileRecorder the new custom class file recorder implementation; null indicates that
84 * {@link DefaultClassFileRecorder the default class file recorder} should be used.
85 */
86 public void setClassFileRecorder( ClassFileRecorder classFileRecorder ) {
87 this.classFileRecorder = classFileRecorder == null ? DEFAULT_CLASS_FILE_RECORDER : classFileRecorder;
88 }
89 }