01: /*
02: * Copyright (c) 2003-2008, Franz-Josef Elmer, All rights reserved.
03: *
04: * Redistribution and use in source and binary forms, with or without
05: * modification, are permitted provided that the following conditions are met:
06: *
07: * - Redistributions of source code must retain the above copyright notice,
08: * this list of conditions and the following disclaimer.
09: * - Redistributions in binary form must reproduce the above copyright notice,
10: * this list of conditions and the following disclaimer in the documentation
11: * and/or other materials provided with the distribution.
12: *
13: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
14: * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
15: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
17: * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
20: * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
21: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
22: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
23: * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24: */
25: package classycle.classfile;
26:
27: /**
28: * Abstract supper class of all reference constants.
29: *
30: * @author Franz-Josef Elmer
31: */
32: public abstract class RefConstant extends Constant {
33: private final int _classIndex;
34: private final int _nameAndTypeIndex;
35:
36: /**
37: * Creates an instance for the specified class, name, and type.
38: * @param pool Constant pool. Needed for resolving references.
39: * @param classIndex Index of {@link ClassConstant}.
40: * @param nameAndTypeIndex Index of {@link NameAndTypeConstant}.
41: */
42: public RefConstant(Constant[] pool, int classIndex,
43: int nameAndTypeIndex) {
44: super (pool);
45: _classIndex = classIndex;
46: _nameAndTypeIndex = nameAndTypeIndex;
47: }
48:
49: /** Returns the class constant. */
50: public ClassConstant getClassConstant() {
51: return (ClassConstant) getConstant(_classIndex);
52: }
53:
54: /** Returns the name-and-type constant. */
55: public NameAndTypeConstant getNameAndType() {
56: return (NameAndTypeConstant) getConstant(_nameAndTypeIndex);
57: }
58:
59: /** Pretty printing. Will be used by <tt>toString</tt> of the subclasses. */
60: protected String toString(String constantType) {
61: return constantType + ": Class = "
62: + getClassConstant().getName() + ", Name = "
63: + getNameAndType().getName() + ", Descriptor = "
64: + getNameAndType().getDescriptor();
65: }
66: } //class
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