org.apache.bcel.generic
Class CPInstruction

java.lang.Object
  org.apache.bcel.generic.Instruction
      org.apache.bcel.generic.CPInstruction

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, IndexedInstruction, TypedInstruction

Direct Known Subclasses:

ANEWARRAY, CHECKCAST, FieldOrMethod, INSTANCEOF, LDC, LDC2_W, MULTIANEWARRAY, NEW

public abstract class CPInstruction
extends Instruction
implements TypedInstruction, IndexedInstruction

Abstract super class for instructions that use an index into the constant pool such as LDC, INVOKEVIRTUAL, etc.

Version:

$Id: CPInstruction.java 386056 2006-03-15 11:31:56Z tcurdt $

Author:

M. Dahm

See Also:

ConstantPoolGen, LDC, INVOKEVIRTUAL, Serialized Form

Field Summary

protected int

index

Fields inherited from class org.apache.bcel.generic.Instruction

length, opcode

Constructor Summary

(package private)	CPInstruction() Empty constructor needed for the Class.newInstance() statement in Instruction.readInstruction().
protected	CPInstruction(short opcode, int index)

Method Summary

void	dump(java.io.DataOutputStream out) Dump instruction as byte code to stream out.
int	getIndex()
Type	getType(ConstantPoolGen cpg)
protected void	initFromFile(ByteSequence bytes, boolean wide) Read needed data (i.e., index) from file.
void	setIndex(int index) Set the index to constant pool.
java.lang.String	toString(boolean verbose) Long output format: <name of opcode> "["<opcode number>"]" "("<length of instruction>")" "<"< constant pool index>">"
java.lang.String	toString(ConstantPool cp)

Methods inherited from class org.apache.bcel.generic.Instruction

accept, consumeStack, copy, dispose, equals, getComparator, getLength, getName, getOpcode, produceStack, readInstruction, setComparator, toString

Methods inherited from class java.lang.Object

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

Field Detail

index

protected int index

Constructor Detail

CPInstruction

CPInstruction()

Empty constructor needed for the Class.newInstance() statement in Instruction.readInstruction(). Not to be used otherwise.

CPInstruction

protected CPInstruction(short opcode,
                        int index)

Parameters:

index - to constant pool

Method Detail

dump

public void dump(java.io.DataOutputStream out)
          throws java.io.IOException

Dump instruction as byte code to stream out.

Overrides:

dump in class Instruction

Parameters:

out - Output stream

Throws:

java.io.IOException

toString

public java.lang.String toString(boolean verbose)

Long output format: <name of opcode> "["<opcode number>"]" "("<length of instruction>")" "<"< constant pool index>">"

Overrides:

toString in class Instruction

Parameters:

verbose - long/short format switch

Returns:

mnemonic for instruction

toString

public java.lang.String toString(ConstantPool cp)

Overrides:

toString in class Instruction

Returns:

mnemonic for instruction with symbolic references resolved

initFromFile

protected void initFromFile(ByteSequence bytes,
                            boolean wide)
                     throws java.io.IOException

Read needed data (i.e., index) from file.

Overrides:

initFromFile in class Instruction

Parameters:

bytes - input stream

wide - wide prefix?

Throws:

java.io.IOException

getIndex

public final int getIndex()

Specified by:

getIndex in interface IndexedInstruction

Returns:

index in constant pool referred by this instruction.

setIndex

public void setIndex(int index)

Set the index to constant pool.

Specified by:

setIndex in interface IndexedInstruction

Parameters:

index - in constant pool.

getType

public Type getType(ConstantPoolGen cpg)

Specified by:

getType in interface TypedInstruction

Returns:

type related with this instruction.