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/***
* 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
* documentation and/or other materials provided with the distribution.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
package scouter.repack.net.bytebuddy.jar.asm.tree;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import scouter.repack.net.bytebuddy.jar.asm.MethodVisitor;
/**
* A node that represents a bytecode instruction. An instruction can appear
* at most once in at most one {@link InsnList} at a time.
*
* @author Eric Bruneton
*/
public abstract class AbstractInsnNode {
/**
* The type of {@link InsnNode} instructions.
*/
public static final int INSN = 0;
/**
* The type of {@link IntInsnNode} instructions.
*/
public static final int INT_INSN = 1;
/**
* The type of {@link VarInsnNode} instructions.
*/
public static final int VAR_INSN = 2;
/**
* The type of {@link TypeInsnNode} instructions.
*/
public static final int TYPE_INSN = 3;
/**
* The type of {@link FieldInsnNode} instructions.
*/
public static final int FIELD_INSN = 4;
/**
* The type of {@link MethodInsnNode} instructions.
*/
public static final int METHOD_INSN = 5;
/**
* The type of {@link InvokeDynamicInsnNode} instructions.
*/
public static final int INVOKE_DYNAMIC_INSN = 6;
/**
* The type of {@link JumpInsnNode} instructions.
*/
public static final int JUMP_INSN = 7;
/**
* The type of {@link LabelNode} "instructions".
*/
public static final int LABEL = 8;
/**
* The type of {@link LdcInsnNode} instructions.
*/
public static final int LDC_INSN = 9;
/**
* The type of {@link IincInsnNode} instructions.
*/
public static final int IINC_INSN = 10;
/**
* The type of {@link TableSwitchInsnNode} instructions.
*/
public static final int TABLESWITCH_INSN = 11;
/**
* The type of {@link LookupSwitchInsnNode} instructions.
*/
public static final int LOOKUPSWITCH_INSN = 12;
/**
* The type of {@link MultiANewArrayInsnNode} instructions.
*/
public static final int MULTIANEWARRAY_INSN = 13;
/**
* The type of {@link FrameNode} "instructions".
*/
public static final int FRAME = 14;
/**
* The type of {@link LineNumberNode} "instructions".
*/
public static final int LINE = 15;
/**
* The opcode of this instruction.
*/
protected int opcode;
/**
* The runtime visible type annotations of this instruction. This field is
* only used for real instructions (i.e. not for labels, frames, or line
* number nodes). This list is a list of {@link TypeAnnotationNode} objects.
* May be null.
*
* @associates scouter.repack.net.bytebuddy.jar.asm.tree.TypeAnnotationNode
* @label visible
*/
public List visibleTypeAnnotations;
/**
* The runtime invisible type annotations of this instruction. This field is
* only used for real instructions (i.e. not for labels, frames, or line
* number nodes). This list is a list of {@link TypeAnnotationNode} objects.
* May be null.
*
* @associates scouter.repack.net.bytebuddy.jar.asm.tree.TypeAnnotationNode
* @label invisible
*/
public List invisibleTypeAnnotations;
/**
* Previous instruction in the list to which this instruction belongs.
*/
AbstractInsnNode prev;
/**
* Next instruction in the list to which this instruction belongs.
*/
AbstractInsnNode next;
/**
* Index of this instruction in the list to which it belongs. The value of
* this field is correct only when {@link InsnList#cache} is not null. A
* value of -1 indicates that this instruction does not belong to any
* {@link InsnList}.
*/
int index;
/**
* Constructs a new {@link AbstractInsnNode}.
*
* @param opcode
* the opcode of the instruction to be constructed.
*/
protected AbstractInsnNode(final int opcode) {
this.opcode = opcode;
this.index = -1;
}
/**
* Returns the opcode of this instruction.
*
* @return the opcode of this instruction.
*/
public int getOpcode() {
return opcode;
}
/**
* Returns the type of this instruction.
*
* @return the type of this instruction, i.e. one the constants defined in
* this class.
*/
public abstract int getType();
/**
* Returns the previous instruction in the list to which this instruction
* belongs, if any.
*
* @return the previous instruction in the list to which this instruction
* belongs, if any. May be null.
*/
public AbstractInsnNode getPrevious() {
return prev;
}
/**
* Returns the next instruction in the list to which this instruction
* belongs, if any.
*
* @return the next instruction in the list to which this instruction
* belongs, if any. May be null.
*/
public AbstractInsnNode getNext() {
return next;
}
/**
* Makes the given code visitor visit this instruction.
*
* @param cv
* a code visitor.
*/
public abstract void accept(final MethodVisitor cv);
/**
* Makes the given visitor visit the annotations of this instruction.
*
* @param mv
* a method visitor.
*/
protected final void acceptAnnotations(final MethodVisitor mv) {
int n = visibleTypeAnnotations == null ? 0 : visibleTypeAnnotations
.size();
for (int i = 0; i < n; ++i) {
TypeAnnotationNode an = visibleTypeAnnotations.get(i);
an.accept(mv.visitInsnAnnotation(an.typeRef, an.typePath, an.desc,
true));
}
n = invisibleTypeAnnotations == null ? 0 : invisibleTypeAnnotations
.size();
for (int i = 0; i < n; ++i) {
TypeAnnotationNode an = invisibleTypeAnnotations.get(i);
an.accept(mv.visitInsnAnnotation(an.typeRef, an.typePath, an.desc,
false));
}
}
/**
* Returns a copy of this instruction.
*
* @param labels
* a map from LabelNodes to cloned LabelNodes.
* @return a copy of this instruction. The returned instruction does not
* belong to any {@link InsnList}.
*/
public abstract AbstractInsnNode clone(
final Map labels);
/**
* Returns the clone of the given label.
*
* @param label
* a label.
* @param map
* a map from LabelNodes to cloned LabelNodes.
* @return the clone of the given label.
*/
static LabelNode clone(final LabelNode label,
final Map map) {
return map.get(label);
}
/**
* Returns the clones of the given labels.
*
* @param labels
* a list of labels.
* @param map
* a map from LabelNodes to cloned LabelNodes.
* @return the clones of the given labels.
*/
static LabelNode[] clone(final List labels,
final Map map) {
LabelNode[] clones = new LabelNode[labels.size()];
for (int i = 0; i < clones.length; ++i) {
clones[i] = map.get(labels.get(i));
}
return clones;
}
/**
* Clones the annotations of the given instruction into this instruction.
*
* @param insn
* the source instruction.
* @return this instruction.
*/
protected final AbstractInsnNode cloneAnnotations(
final AbstractInsnNode insn) {
if (insn.visibleTypeAnnotations != null) {
this.visibleTypeAnnotations = new ArrayList();
for (int i = 0; i < insn.visibleTypeAnnotations.size(); ++i) {
TypeAnnotationNode src = insn.visibleTypeAnnotations.get(i);
TypeAnnotationNode ann = new TypeAnnotationNode(src.typeRef,
src.typePath, src.desc);
src.accept(ann);
this.visibleTypeAnnotations.add(ann);
}
}
if (insn.invisibleTypeAnnotations != null) {
this.invisibleTypeAnnotations = new ArrayList();
for (int i = 0; i < insn.invisibleTypeAnnotations.size(); ++i) {
TypeAnnotationNode src = insn.invisibleTypeAnnotations.get(i);
TypeAnnotationNode ann = new TypeAnnotationNode(src.typeRef,
src.typePath, src.desc);
src.accept(ann);
this.invisibleTypeAnnotations.add(ann);
}
}
return this;
}
}
