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jeremybenn |
/***
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* ASM: a very small and fast Java bytecode manipulation framework
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* Copyright (c) 2000-2005 INRIA, France Telecom
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.objectweb.asm.util;
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import org.objectweb.asm.AnnotationVisitor;
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import org.objectweb.asm.Attribute;
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import org.objectweb.asm.FieldVisitor;
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/**
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* A {@link FieldVisitor} that checks that its methods are properly used.
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*/
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public class CheckFieldAdapter implements FieldVisitor {
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private FieldVisitor fv;
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private boolean end;
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public CheckFieldAdapter(final FieldVisitor fv) {
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this.fv = fv;
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}
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public AnnotationVisitor visitAnnotation(final String desc, boolean visible)
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{
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checkEnd();
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CheckMethodAdapter.checkDesc(desc, false);
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return new CheckAnnotationAdapter(fv.visitAnnotation(desc, visible));
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}
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public void visitAttribute(final Attribute attr) {
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checkEnd();
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if (attr == null) {
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throw new IllegalArgumentException("Invalid attribute (must not be null)");
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}
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fv.visitAttribute(attr);
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}
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public void visitEnd() {
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checkEnd();
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end = true;
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fv.visitEnd();
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}
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private void checkEnd() {
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if (end) {
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throw new IllegalStateException("Cannot call a visit method after visitEnd has been called");
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}
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}
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}
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