01: /***
02: * ASM: a very small and fast Java bytecode manipulation framework
03: * Copyright (c) 2000-2005 INRIA, France Telecom
04: * All rights reserved.
05: *
06: * Redistribution and use in source and binary forms, with or without
07: * modification, are permitted provided that the following conditions
08: * are met:
09: * 1. Redistributions of source code must retain the above copyright
10: * notice, this list of conditions and the following disclaimer.
11: * 2. Redistributions in binary form must reproduce the above copyright
12: * notice, this list of conditions and the following disclaimer in the
13: * documentation and/or other materials provided with the distribution.
14: * 3. Neither the name of the copyright holders nor the names of its
15: * contributors may be used to endorse or promote products derived from
16: * this software without specific prior written permission.
17: *
18: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19: * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21: * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
22: * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
28: * THE POSSIBILITY OF SUCH DAMAGE.
29: */package org.objectweb.asm.util;
30:
31: import org.objectweb.asm.AnnotationVisitor;
32: import org.objectweb.asm.Attribute;
33: import org.objectweb.asm.FieldVisitor;
34:
35: /**
36: * A {@link FieldVisitor} that checks that its methods are properly used.
37: */
38: public class CheckFieldAdapter implements FieldVisitor {
39:
40: private FieldVisitor fv;
41:
42: private boolean end;
43:
44: public CheckFieldAdapter(final FieldVisitor fv) {
45: this .fv = fv;
46: }
47:
48: public AnnotationVisitor visitAnnotation(final String desc,
49: final boolean visible) {
50: checkEnd();
51: CheckMethodAdapter.checkDesc(desc, false);
52: return new CheckAnnotationAdapter(fv.visitAnnotation(desc,
53: visible));
54: }
55:
56: public void visitAttribute(final Attribute attr) {
57: checkEnd();
58: if (attr == null) {
59: throw new IllegalArgumentException(
60: "Invalid attribute (must not be null)");
61: }
62: fv.visitAttribute(attr);
63: }
64:
65: public void visitEnd() {
66: checkEnd();
67: end = true;
68: fv.visitEnd();
69: }
70:
71: private void checkEnd() {
72: if (end) {
73: throw new IllegalStateException(
74: "Cannot call a visit method after visitEnd has been called");
75: }
76: }
77: }
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