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/*
 * This file is available under and governed by the GNU General Public
 * License version 2 only, as published by the Free Software Foundation.
 * However, the following notice accompanied the original version of this
 * file:
 *
 * ASM: a very small and fast Java bytecode manipulation framework
 * Copyright (c) 2000-2011 INRIA, France Telecom
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
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 * 3. Neither the name of the copyright holders nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
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package jdk.internal.org.objectweb.asm.util;

import jdk.internal.org.objectweb.asm.AnnotationVisitor;
import jdk.internal.org.objectweb.asm.Attribute;
import jdk.internal.org.objectweb.asm.FieldVisitor;
import jdk.internal.org.objectweb.asm.Opcodes;
import jdk.internal.org.objectweb.asm.TypePath;
import jdk.internal.org.objectweb.asm.TypeReference;

A FieldVisitor that checks that its methods are properly used.
Author:Eric Bruneton
/** * A {@link FieldVisitor} that checks that its methods are properly used. * * @author Eric Bruneton */
public class CheckFieldAdapter extends FieldVisitor {
Whether the visitEnd method has been called.
/** Whether the {@link #visitEnd} method has been called. */
private boolean visitEndCalled;
Constructs a new CheckFieldAdapter. Subclasses must not use this constructor. Instead, they must use the CheckFieldAdapter(int, FieldVisitor) version.
Params:
  • fieldVisitor – the field visitor to which this adapter must delegate calls.
Throws:
/** * Constructs a new {@link CheckFieldAdapter}. <i>Subclasses must not use this constructor</i>. * Instead, they must use the {@link #CheckFieldAdapter(int, FieldVisitor)} version. * * @param fieldVisitor the field visitor to which this adapter must delegate calls. * @throws IllegalStateException If a subclass calls this constructor. */
public CheckFieldAdapter(final FieldVisitor fieldVisitor) { this(/* latest api = */ Opcodes.ASM8, fieldVisitor); if (getClass() != CheckFieldAdapter.class) { throw new IllegalStateException(); } }
Constructs a new CheckFieldAdapter.
Params:
/** * Constructs a new {@link CheckFieldAdapter}. * * @param api the ASM API version implemented by this visitor. Must be one of {@link * Opcodes#ASM4}, {@link Opcodes#ASM5}, {@link Opcodes#ASM6}, {@link Opcodes#ASM7} or {@link * Opcodes#ASM8}. * @param fieldVisitor the field visitor to which this adapter must delegate calls. */
protected CheckFieldAdapter(final int api, final FieldVisitor fieldVisitor) { super(api, fieldVisitor); } @Override public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) { checkVisitEndNotCalled(); // Annotations can only appear in V1_5 or more classes. CheckMethodAdapter.checkDescriptor(Opcodes.V1_5, descriptor, false); return new CheckAnnotationAdapter(super.visitAnnotation(descriptor, visible)); } @Override public AnnotationVisitor visitTypeAnnotation( final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) { checkVisitEndNotCalled(); int sort = new TypeReference(typeRef).getSort(); if (sort != TypeReference.FIELD) { throw new IllegalArgumentException( "Invalid type reference sort 0x" + Integer.toHexString(sort)); } CheckClassAdapter.checkTypeRef(typeRef); CheckMethodAdapter.checkDescriptor(Opcodes.V1_5, descriptor, false); return new CheckAnnotationAdapter( super.visitTypeAnnotation(typeRef, typePath, descriptor, visible)); } @Override public void visitAttribute(final Attribute attribute) { checkVisitEndNotCalled(); if (attribute == null) { throw new IllegalArgumentException("Invalid attribute (must not be null)"); } super.visitAttribute(attribute); } @Override public void visitEnd() { checkVisitEndNotCalled(); visitEndCalled = true; super.visitEnd(); } private void checkVisitEndNotCalled() { if (visitEndCalled) { throw new IllegalStateException("Cannot call a visit method after visitEnd has been called"); } } }