Source Code Cross Referenced for CheckFieldAdapter.java in  » Rule-Engine » drolls-Rule-Engine » org » drools » asm » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Rule Engine » drolls Rule Engine » org.drools.asm.util 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


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.drools.asm.util;
30:
31:        import org.drools.asm.AnnotationVisitor;
32:        import org.drools.asm.Attribute;
33:        import org.drools.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(this .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:                this .fv.visitAttribute(attr);
63:            }
64:
65:            public void visitEnd() {
66:                checkEnd();
67:                this .end = true;
68:                this .fv.visitEnd();
69:            }
70:
71:            private void checkEnd() {
72:                if (this .end) {
73:                    throw new IllegalStateException(
74:                            "Cannot call a visit method after visitEnd has been called");
75:                }
76:            }
77:        }
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