01: /*
02: * Copyright 2004 Brian S O'Neill
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
10: * Unless required by applicable law or agreed to in writing, software
11: * distributed under the License is distributed on an "AS IS" BASIS,
12: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13: * See the License for the specific language governing permissions and
14: * limitations under the License.
15: */
16:
17: package org.cojen.classfile.attribute;
18:
19: import java.io.DataInput;
20: import java.io.DataOutput;
21: import java.io.IOException;
22: import org.cojen.classfile.Attribute;
23: import org.cojen.classfile.ConstantPool;
24: import org.cojen.classfile.constant.ConstantUTFInfo;
25:
26: /**
27: * This class corresponds to the SourceFile_attribute structure as defined
28: * in section 4.7.2 of <i>The Java Virtual Machine Specification</i>.
29: *
30: * @author Brian S O'Neill
31: * @see cojen.classfile.ClassFile
32: */
33: public class SourceFileAttr extends Attribute {
34:
35: private final ConstantUTFInfo mSourcefile;
36:
37: public SourceFileAttr(ConstantPool cp, String fileName) {
38: this (cp, SOURCE_FILE, fileName);
39: }
40:
41: public SourceFileAttr(ConstantPool cp, String name, String fileName) {
42: super (cp, name);
43: mSourcefile = cp.addConstantUTF(fileName);
44: }
45:
46: public SourceFileAttr(ConstantPool cp, String name, int length,
47: DataInput din) throws IOException {
48: super (cp, name);
49: int index = din.readUnsignedShort();
50: if ((length -= 2) > 0) {
51: din.skipBytes(length);
52: }
53: mSourcefile = (ConstantUTFInfo) cp.getConstant(index);
54: }
55:
56: /**
57: * Returns the source file name.
58: */
59: public ConstantUTFInfo getFileName() {
60: return mSourcefile;
61: }
62:
63: /**
64: * Returns the length of the source file attribute, which is 2 bytes.
65: */
66: public int getLength() {
67: return 2;
68: }
69:
70: public void writeDataTo(DataOutput dout) throws IOException {
71: dout.writeShort(mSourcefile.getIndex());
72: }
73: }
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