/* |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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/* |
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* This file is available under and governed by the GNU General Public |
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* License version 2 only, as published by the Free Software Foundation. |
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* However, the following notice accompanied the original version of this |
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* file: |
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* |
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* ASM: a very small and fast Java bytecode manipulation framework |
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* Copyright (c) 2000-2011 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 jdk.internal.org.objectweb.asm.tree; |
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import java.util.ArrayList; |
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import java.util.List; |
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import java.util.Map; |
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import jdk.internal.org.objectweb.asm.MethodVisitor; |
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/** |
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* A node that represents a bytecode instruction. <i>An instruction can appear at most once in at |
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* most one {@link InsnList} at a time</i>. |
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* |
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* @author Eric Bruneton |
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*/ |
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public abstract class AbstractInsnNode { |
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/** The type of {@link InsnNode} instructions. */ |
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public static final int INSN = 0; |
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/** The type of {@link IntInsnNode} instructions. */ |
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public static final int INT_INSN = 1; |
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/** The type of {@link VarInsnNode} instructions. */ |
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public static final int VAR_INSN = 2; |
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/** The type of {@link TypeInsnNode} instructions. */ |
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public static final int TYPE_INSN = 3; |
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/** The type of {@link FieldInsnNode} instructions. */ |
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public static final int FIELD_INSN = 4; |
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/** The type of {@link MethodInsnNode} instructions. */ |
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public static final int METHOD_INSN = 5; |
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/** The type of {@link InvokeDynamicInsnNode} instructions. */ |
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public static final int INVOKE_DYNAMIC_INSN = 6; |
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/** The type of {@link JumpInsnNode} instructions. */ |
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public static final int JUMP_INSN = 7; |
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/** The type of {@link LabelNode} "instructions". */ |
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public static final int LABEL = 8; |
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/** The type of {@link LdcInsnNode} instructions. */ |
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public static final int LDC_INSN = 9; |
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/** The type of {@link IincInsnNode} instructions. */ |
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public static final int IINC_INSN = 10; |
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/** The type of {@link TableSwitchInsnNode} instructions. */ |
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public static final int TABLESWITCH_INSN = 11; |
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/** The type of {@link LookupSwitchInsnNode} instructions. */ |
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public static final int LOOKUPSWITCH_INSN = 12; |
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/** The type of {@link MultiANewArrayInsnNode} instructions. */ |
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public static final int MULTIANEWARRAY_INSN = 13; |
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/** The type of {@link FrameNode} "instructions". */ |
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public static final int FRAME = 14; |
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/** The type of {@link LineNumberNode} "instructions". */ |
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public static final int LINE = 15; |
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/** The opcode of this instruction. */ |
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protected int opcode; |
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/** |
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* The runtime visible type annotations of this instruction. This field is only used for real |
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* instructions (i.e. not for labels, frames, or line number nodes). This list is a list of {@link |
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* TypeAnnotationNode} objects. May be {@literal null}. |
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*/ |
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public List<TypeAnnotationNode> visibleTypeAnnotations; |
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/** |
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* The runtime invisible type annotations of this instruction. This field is only used for real |
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* instructions (i.e. not for labels, frames, or line number nodes). This list is a list of {@link |
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* TypeAnnotationNode} objects. May be {@literal null}. |
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*/ |
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public List<TypeAnnotationNode> invisibleTypeAnnotations; |
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/** The previous instruction in the list to which this instruction belongs. */ |
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AbstractInsnNode previousInsn; |
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/** The next instruction in the list to which this instruction belongs. */ |
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AbstractInsnNode nextInsn; |
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/** |
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* The index of this instruction in the list to which it belongs. The value of this field is |
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* correct only when {@link InsnList#cache} is not null. A value of -1 indicates that this |
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* instruction does not belong to any {@link InsnList}. |
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*/ |
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int index; |
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/** |
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* Constructs a new {@link AbstractInsnNode}. |
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* |
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* @param opcode the opcode of the instruction to be constructed. |
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*/ |
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protected AbstractInsnNode(final int opcode) { |
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this.opcode = opcode; |
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this.index = -1; |
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} |
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/** |
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* Returns the opcode of this instruction. |
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* |
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* @return the opcode of this instruction. |
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*/ |
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public int getOpcode() { |
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return opcode; |
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} |
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/** |
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* Returns the type of this instruction. |
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* |
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* @return the type of this instruction, i.e. one the constants defined in this class. |
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*/ |
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public abstract int getType(); |
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/** |
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* Returns the previous instruction in the list to which this instruction belongs, if any. |
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* |
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* @return the previous instruction in the list to which this instruction belongs, if any. May be |
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* {@literal null}. |
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*/ |
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public AbstractInsnNode getPrevious() { |
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return previousInsn; |
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} |
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/** |
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* Returns the next instruction in the list to which this instruction belongs, if any. |
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* |
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* @return the next instruction in the list to which this instruction belongs, if any. May be |
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* {@literal null}. |
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*/ |
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public AbstractInsnNode getNext() { |
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return nextInsn; |
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} |
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/** |
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* Makes the given method visitor visit this instruction. |
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* |
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* @param methodVisitor a method visitor. |
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*/ |
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public abstract void accept(MethodVisitor methodVisitor); |
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/** |
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* Makes the given visitor visit the annotations of this instruction. |
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* |
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* @param methodVisitor a method visitor. |
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*/ |
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protected final void acceptAnnotations(final MethodVisitor methodVisitor) { |
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if (visibleTypeAnnotations != null) { |
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for (int i = 0, n = visibleTypeAnnotations.size(); i < n; ++i) { |
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TypeAnnotationNode typeAnnotation = visibleTypeAnnotations.get(i); |
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typeAnnotation.accept( |
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methodVisitor.visitInsnAnnotation( |
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typeAnnotation.typeRef, typeAnnotation.typePath, typeAnnotation.desc, true)); |
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} |
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} |
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if (invisibleTypeAnnotations != null) { |
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for (int i = 0, n = invisibleTypeAnnotations.size(); i < n; ++i) { |
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TypeAnnotationNode typeAnnotation = invisibleTypeAnnotations.get(i); |
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typeAnnotation.accept( |
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methodVisitor.visitInsnAnnotation( |
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typeAnnotation.typeRef, typeAnnotation.typePath, typeAnnotation.desc, false)); |
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} |
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} |
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} |
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/** |
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* Returns a copy of this instruction. |
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* |
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* @param clonedLabels a map from LabelNodes to cloned LabelNodes. |
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* @return a copy of this instruction. The returned instruction does not belong to any {@link |
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* InsnList}. |
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*/ |
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public abstract AbstractInsnNode clone(Map<LabelNode, LabelNode> clonedLabels); |
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/** |
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* Returns the clone of the given label. |
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* |
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* @param label a label. |
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* @param clonedLabels a map from LabelNodes to cloned LabelNodes. |
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* @return the clone of the given label. |
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*/ |
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static LabelNode clone(final LabelNode label, final Map<LabelNode, LabelNode> clonedLabels) { |
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return clonedLabels.get(label); |
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} |
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/** |
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* Returns the clones of the given labels. |
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* |
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* @param labels a list of labels. |
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* @param clonedLabels a map from LabelNodes to cloned LabelNodes. |
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* @return the clones of the given labels. |
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*/ |
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static LabelNode[] clone( |
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final List<LabelNode> labels, final Map<LabelNode, LabelNode> clonedLabels) { |
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LabelNode[] clones = new LabelNode[labels.size()]; |
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for (int i = 0, n = clones.length; i < n; ++i) { |
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clones[i] = clonedLabels.get(labels.get(i)); |
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} |
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return clones; |
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} |
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/** |
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* Clones the annotations of the given instruction into this instruction. |
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* |
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* @param insnNode the source instruction. |
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* @return this instruction. |
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*/ |
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protected final AbstractInsnNode cloneAnnotations(final AbstractInsnNode insnNode) { |
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if (insnNode.visibleTypeAnnotations != null) { |
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this.visibleTypeAnnotations = new ArrayList<>(); |
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for (int i = 0, n = insnNode.visibleTypeAnnotations.size(); i < n; ++i) { |
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TypeAnnotationNode sourceAnnotation = insnNode.visibleTypeAnnotations.get(i); |
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TypeAnnotationNode cloneAnnotation = |
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new TypeAnnotationNode( |
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sourceAnnotation.typeRef, sourceAnnotation.typePath, sourceAnnotation.desc); |
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sourceAnnotation.accept(cloneAnnotation); |
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this.visibleTypeAnnotations.add(cloneAnnotation); |
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} |
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} |
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if (insnNode.invisibleTypeAnnotations != null) { |
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this.invisibleTypeAnnotations = new ArrayList<>(); |
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for (int i = 0, n = insnNode.invisibleTypeAnnotations.size(); i < n; ++i) { |
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TypeAnnotationNode sourceAnnotation = insnNode.invisibleTypeAnnotations.get(i); |
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TypeAnnotationNode cloneAnnotation = |
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new TypeAnnotationNode( |
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sourceAnnotation.typeRef, sourceAnnotation.typePath, sourceAnnotation.desc); |
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sourceAnnotation.accept(cloneAnnotation); |
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this.invisibleTypeAnnotations.add(cloneAnnotation); |
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} |
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} |
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return this; |
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} |
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} |