org.objectweb.asm.tree

Class InsnList

java.lang.Object

org.objectweb.asm.tree.InsnList

public class InsnList
extends Object

A doubly linked list of AbstractInsnNode objects. This implementation is not thread safe.

Constructor Summary

Constructors

Constructor and Description
InsnList()

Method Summary

Methods

Modifier and Type	Method and Description
void	accept(MethodVisitor mv) Makes the given visitor visit all of the instructions in this list.
void	add(AbstractInsnNode insn) Adds the given instruction to the end of this list.
void	add(InsnList insns) Adds the given instructions to the end of this list.
void	clear() Removes all of the instructions of this list.
boolean	contains(AbstractInsnNode insn) Returns true if the given instruction belongs to this list.
AbstractInsnNode	get(int index) Returns the instruction whose index is given.
AbstractInsnNode	getFirst() Returns the first instruction in this list.
AbstractInsnNode	getLast() Returns the last instruction in this list.
int	indexOf(AbstractInsnNode insn) Returns the index of the given instruction in this list.
void	insert(AbstractInsnNode insn) Inserts the given instruction at the begining of this list.
void	insert(AbstractInsnNode location, AbstractInsnNode insn) Inserts the given instruction after the specified instruction.
void	insert(AbstractInsnNode location, InsnList insns) Inserts the given instructions after the specified instruction.
void	insert(InsnList insns) Inserts the given instructions at the begining of this list.
void	insertBefore(AbstractInsnNode location, AbstractInsnNode insn) Inserts the given instruction before the specified instruction.
void	insertBefore(AbstractInsnNode location, InsnList insns) Inserts the given instructions before the specified instruction.
ListIterator<AbstractInsnNode>	iterator() Returns an iterator over the instructions in this list.
ListIterator<AbstractInsnNode>	iterator(int index) Returns an iterator over the instructions in this list.
void	remove(AbstractInsnNode insn) Removes the given instruction from this list.
void	resetLabels() Reset all labels in the instruction list.
void	set(AbstractInsnNode location, AbstractInsnNode insn) Replaces an instruction of this list with another instruction.
int	size() Returns the number of instructions in this list.
AbstractInsnNode[]	toArray() Returns an array containing all of the instructions in this list.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

InsnList

public InsnList()

Method Detail

size

public int size()

Returns the number of instructions in this list.

Returns:

the number of instructions in this list.

getFirst

public AbstractInsnNode getFirst()

Returns the first instruction in this list.

Returns:

the first instruction in this list, or null if the list is empty.

getLast

public AbstractInsnNode getLast()

Returns the last instruction in this list.

Returns:

the last instruction in this list, or null if the list is empty.

get

public AbstractInsnNode get(int index)

Returns the instruction whose index is given. This method builds a cache of the instructions in this list to avoid scanning the whole list each time it is called. Once the cache is built, this method run in constant time. This cache is invalidated by all the methods that modify the list.

Parameters:

index - the index of the instruction that must be returned.

Returns:

the instruction whose index is given.

Throws:

IndexOutOfBoundsException - if (index < 0 || index >= size()).

contains

public boolean contains(AbstractInsnNode insn)

Returns true if the given instruction belongs to this list. This method always scans the instructions of this list until it finds the given instruction or reaches the end of the list.

Parameters:

insn - an instruction.

Returns:

true if the given instruction belongs to this list.

indexOf

public int indexOf(AbstractInsnNode insn)

Returns the index of the given instruction in this list. This method builds a cache of the instruction indexes to avoid scanning the whole list each time it is called. Once the cache is built, this method run in constant time. The cache is invalidated by all the methods that modify the list.

Parameters:

insn - an instruction of this list.

Returns:

the index of the given instruction in this list. The result of this method is undefined if the given instruction does not belong to this list. Use contains to test if an instruction belongs to an instruction list or not.

accept

public void accept(MethodVisitor mv)

Makes the given visitor visit all of the instructions in this list.

Parameters:

mv - the method visitor that must visit the instructions.

iterator

public ListIterator<AbstractInsnNode> iterator()

Returns an iterator over the instructions in this list.

Returns:

an iterator over the instructions in this list.

iterator

public ListIterator<AbstractInsnNode> iterator(int index)

Returns an iterator over the instructions in this list.

Returns:

an iterator over the instructions in this list.

toArray

public AbstractInsnNode[] toArray()

Returns an array containing all of the instructions in this list.

Returns:

an array containing all of the instructions in this list.

set

public void set(AbstractInsnNode location,
       AbstractInsnNode insn)

Replaces an instruction of this list with another instruction.

Parameters:

location - an instruction of this list.

insn - another instruction, which must not belong to any InsnList.

add

public void add(AbstractInsnNode insn)

Adds the given instruction to the end of this list.

Parameters:

insn - an instruction, which must not belong to any InsnList.

add

public void add(InsnList insns)

Adds the given instructions to the end of this list.

Parameters:

insns - an instruction list, which is cleared during the process. This list must be different from 'this'.

insert

public void insert(AbstractInsnNode insn)

Inserts the given instruction at the begining of this list.

Parameters:

insn - an instruction, which must not belong to any InsnList.

insert

public void insert(InsnList insns)

Inserts the given instructions at the begining of this list.

Parameters:

insns - an instruction list, which is cleared during the process. This list must be different from 'this'.

insert

public void insert(AbstractInsnNode location,
          AbstractInsnNode insn)

Inserts the given instruction after the specified instruction.

Parameters:

location - an instruction of this list after which insn must be inserted.

insn - the instruction to be inserted, which must not belong to any InsnList.

insert

public void insert(AbstractInsnNode location,
          InsnList insns)

Inserts the given instructions after the specified instruction.

Parameters:

location - an instruction of this list after which the instructions must be inserted.

insns - the instruction list to be inserted, which is cleared during the process. This list must be different from 'this'.

insertBefore

public void insertBefore(AbstractInsnNode location,
                AbstractInsnNode insn)

Inserts the given instruction before the specified instruction.

Parameters:

location - an instruction of this list before which insn must be inserted.

insn - the instruction to be inserted, which must not belong to any InsnList.

insertBefore

public void insertBefore(AbstractInsnNode location,
                InsnList insns)

Inserts the given instructions before the specified instruction.

Parameters:

location - an instruction of this list before which the instructions must be inserted.

insns - the instruction list to be inserted, which is cleared during the process. This list must be different from 'this'.

remove

public void remove(AbstractInsnNode insn)

Removes the given instruction from this list.

Parameters:

insn - the instruction of this list that must be removed.

clear

public void clear()

Removes all of the instructions of this list.

resetLabels

public void resetLabels()

Reset all labels in the instruction list. This method should be called before reusing same instructions list between several ClassWriters.