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https://github.com/2006-Scape/Parabot.git
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Moved to Maven
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JKetelaar
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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 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 org.objectweb.asm.MethodVisitor;
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/**
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* A node that represents a bytecode instruction. <i>An instruction can appear
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* at most once in at 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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/**
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* The type of {@link InsnNode} instructions.
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*/
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public static final int INSN = 0;
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/**
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* The type of {@link IntInsnNode} instructions.
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*/
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public static final int INT_INSN = 1;
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/**
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* The type of {@link VarInsnNode} instructions.
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*/
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public static final int VAR_INSN = 2;
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/**
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* The type of {@link TypeInsnNode} instructions.
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*/
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public static final int TYPE_INSN = 3;
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/**
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* The type of {@link FieldInsnNode} instructions.
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*/
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public static final int FIELD_INSN = 4;
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/**
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* The type of {@link MethodInsnNode} instructions.
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*/
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public static final int METHOD_INSN = 5;
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/**
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* The type of {@link InvokeDynamicInsnNode} instructions.
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*/
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public static final int INVOKE_DYNAMIC_INSN = 6;
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/**
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* The type of {@link JumpInsnNode} instructions.
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*/
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public static final int JUMP_INSN = 7;
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/**
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* The type of {@link LabelNode} "instructions".
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*/
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public static final int LABEL = 8;
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/**
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* The type of {@link LdcInsnNode} instructions.
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*/
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public static final int LDC_INSN = 9;
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/**
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* The type of {@link IincInsnNode} instructions.
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*/
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public static final int IINC_INSN = 10;
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/**
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* The type of {@link TableSwitchInsnNode} instructions.
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*/
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public static final int TABLESWITCH_INSN = 11;
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/**
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* The type of {@link LookupSwitchInsnNode} instructions.
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*/
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public static final int LOOKUPSWITCH_INSN = 12;
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/**
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* The type of {@link MultiANewArrayInsnNode} instructions.
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*/
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public static final int MULTIANEWARRAY_INSN = 13;
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/**
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* The type of {@link FrameNode} "instructions".
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*/
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public static final int FRAME = 14;
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/**
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* The type of {@link LineNumberNode} "instructions".
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*/
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public static final int LINE = 15;
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/**
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* The opcode of this instruction.
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*/
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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
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* only used for real instructions (i.e. not for labels, frames, or line
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* number nodes). This list is a list of {@link TypeAnnotationNode} objects.
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* May be <tt>null</tt>.
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*
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* @associates org.objectweb.asm.tree.TypeAnnotationNode
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* @label visible
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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
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* only used for real instructions (i.e. not for labels, frames, or line
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* number nodes). This list is a list of {@link TypeAnnotationNode} objects.
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* May be <tt>null</tt>.
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*
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* @associates org.objectweb.asm.tree.TypeAnnotationNode
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* @label invisible
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*/
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public List<TypeAnnotationNode> invisibleTypeAnnotations;
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/**
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* Previous instruction in the list to which this instruction belongs.
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*/
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AbstractInsnNode prev;
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/**
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* Next instruction in the list to which this instruction belongs.
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*/
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AbstractInsnNode next;
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/**
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* Index of this instruction in the list to which it belongs. The value of
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* this field is correct only when {@link InsnList#cache} is not null. A
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* value of -1 indicates that this instruction does not belong to any
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* {@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
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* 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
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* 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
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* belongs, if any.
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*
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* @return the previous instruction in the list to which this instruction
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* belongs, if any. May be <tt>null</tt>.
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*/
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public AbstractInsnNode getPrevious() {
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return prev;
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}
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/**
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* Returns the next instruction in the list to which this instruction
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* belongs, if any.
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*
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* @return the next instruction in the list to which this instruction
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* belongs, if any. May be <tt>null</tt>.
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*/
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public AbstractInsnNode getNext() {
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return next;
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}
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/**
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* Makes the given code visitor visit this instruction.
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*
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* @param cv
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* a code visitor.
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*/
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public abstract void accept(final MethodVisitor cv);
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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 mv
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* a method visitor.
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*/
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protected final void acceptAnnotations(final MethodVisitor mv) {
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int n = visibleTypeAnnotations == null ? 0 : visibleTypeAnnotations
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.size();
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for (int i = 0; i < n; ++i) {
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TypeAnnotationNode an = visibleTypeAnnotations.get(i);
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an.accept(mv.visitInsnAnnotation(an.typeRef, an.typePath, an.desc,
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true));
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}
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n = invisibleTypeAnnotations == null ? 0 : invisibleTypeAnnotations
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.size();
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for (int i = 0; i < n; ++i) {
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TypeAnnotationNode an = invisibleTypeAnnotations.get(i);
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an.accept(mv.visitInsnAnnotation(an.typeRef, an.typePath, an.desc,
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false));
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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 labels
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* a map from LabelNodes to cloned LabelNodes.
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* @return a copy of this instruction. The returned instruction does not
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* belong to any {@link InsnList}.
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*/
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public abstract AbstractInsnNode clone(
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final Map<LabelNode, LabelNode> labels);
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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
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* a label.
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* @param map
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* 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,
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final Map<LabelNode, LabelNode> map) {
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return map.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
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* a list of labels.
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* @param map
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* 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(final List<LabelNode> labels,
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final Map<LabelNode, LabelNode> map) {
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LabelNode[] clones = new LabelNode[labels.size()];
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for (int i = 0; i < clones.length; ++i) {
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clones[i] = map.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 insn
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* the source instruction.
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* @return this instruction.
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*/
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protected final AbstractInsnNode cloneAnnotations(
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final AbstractInsnNode insn) {
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if (insn.visibleTypeAnnotations != null) {
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this.visibleTypeAnnotations = new ArrayList<TypeAnnotationNode>();
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for (int i = 0; i < insn.visibleTypeAnnotations.size(); ++i) {
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TypeAnnotationNode src = insn.visibleTypeAnnotations.get(i);
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TypeAnnotationNode ann = new TypeAnnotationNode(src.typeRef,
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src.typePath, src.desc);
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src.accept(ann);
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this.visibleTypeAnnotations.add(ann);
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}
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}
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if (insn.invisibleTypeAnnotations != null) {
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this.invisibleTypeAnnotations = new ArrayList<TypeAnnotationNode>();
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for (int i = 0; i < insn.invisibleTypeAnnotations.size(); ++i) {
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TypeAnnotationNode src = insn.invisibleTypeAnnotations.get(i);
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TypeAnnotationNode ann = new TypeAnnotationNode(src.typeRef,
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src.typePath, src.desc);
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src.accept(ann);
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this.invisibleTypeAnnotations.add(ann);
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}
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}
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return this;
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}
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}
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