bcel API: Interface InstructionConstants

org.apache.bcel.generic
Interface InstructionConstants

All Known Implementing Classes:
PUSH, InstructionFactory

public interface InstructionConstants

This interface contains shareable instruction objects. In order to save memory you can use some instructions multiply, since they have an immutable state and are directly derived from Instruction. I.e. they have no instance fields that could be changed. Since some of these instructions like ICONST_0 occur very frequently this can save a lot of time and space. This feature is an adaptation of the FlyWeight design pattern, we just use an array instead of a factory. The Instructions can also accessed directly under their names, so it's possible to write il.append(Instruction.ICONST_0);

Version:
$Id: InstructionConstants.java,v 1.1.1.1 2001/10/29 20:00:18 jvanzyl Exp $
Author:
M. Dahm

Inner Class Summary
static class InstructionConstants.Clinit
           
 
Field Summary
static ArrayInstruction AALOAD
           
static ArrayInstruction AASTORE
           
static Instruction ACONST_NULL
           
static LocalVariableInstruction ALOAD_0
           
static LocalVariableInstruction ALOAD_1
           
static LocalVariableInstruction ALOAD_2
           
static ReturnInstruction ARETURN
           
static Instruction ARRAYLENGTH
           
static LocalVariableInstruction ASTORE_0
           
static LocalVariableInstruction ASTORE_1
           
static LocalVariableInstruction ASTORE_2
           
static Instruction ATHROW
           
static ArrayInstruction BALOAD
           
static ArrayInstruction BASTORE
           
static InstructionConstants.Clinit bla
          Interfaces may have no static initializers, so we simulate this with an inner class.
static ArrayInstruction CALOAD
           
static ArrayInstruction CASTORE
           
static ConversionInstruction D2F
           
static ConversionInstruction D2I
           
static ConversionInstruction D2L
           
static ArithmeticInstruction DADD
           
static ArrayInstruction DALOAD
           
static ArrayInstruction DASTORE
           
static Instruction DCMPG
           
static Instruction DCMPL
           
static Instruction DCONST_0
           
static Instruction DCONST_1
           
static ArithmeticInstruction DDIV
           
static ArithmeticInstruction DMUL
           
static ArithmeticInstruction DNEG
           
static ArithmeticInstruction DREM
           
static ReturnInstruction DRETURN
           
static ArithmeticInstruction DSUB
           
static StackInstruction DUP
           
static StackInstruction DUP_X1
           
static StackInstruction DUP_X2
           
static StackInstruction DUP2
           
static StackInstruction DUP2_X1
           
static StackInstruction DUP2_X2
           
static ConversionInstruction F2D
           
static ConversionInstruction F2I
           
static ConversionInstruction F2L
           
static ArithmeticInstruction FADD
           
static ArrayInstruction FALOAD
           
static ArrayInstruction FASTORE
           
static Instruction FCMPG
           
static Instruction FCMPL
           
static Instruction FCONST_0
           
static Instruction FCONST_1
           
static Instruction FCONST_2
           
static ArithmeticInstruction FDIV
           
static ArithmeticInstruction FMUL
           
static ArithmeticInstruction FNEG
           
static ArithmeticInstruction FREM
           
static ReturnInstruction FRETURN
           
static ArithmeticInstruction FSUB
           
static ConversionInstruction I2B
           
static ConversionInstruction I2C
           
static ConversionInstruction I2D
           
static ConversionInstruction I2F
           
static ConversionInstruction I2L
           
static ConversionInstruction I2S
           
static ArithmeticInstruction IADD
           
static ArrayInstruction IALOAD
           
static ArithmeticInstruction IAND
           
static ArrayInstruction IASTORE
           
static Instruction ICONST_0
           
static Instruction ICONST_1
           
static Instruction ICONST_2
           
static Instruction ICONST_3
           
static Instruction ICONST_4
           
static Instruction ICONST_5
           
static Instruction ICONST_M1
           
static ArithmeticInstruction IDIV
           
static LocalVariableInstruction ILOAD_0
           
static LocalVariableInstruction ILOAD_1
           
static LocalVariableInstruction ILOAD_2
           
static ArithmeticInstruction IMUL
           
static ArithmeticInstruction INEG
           
static Instruction[] INSTRUCTIONS
          Get object via its opcode, for immutable instructions like branch instructions entries are set to null.
static ArithmeticInstruction IOR
           
static ArithmeticInstruction IREM
           
static ReturnInstruction IRETURN
           
static ArithmeticInstruction ISHL
           
static ArithmeticInstruction ISHR
           
static LocalVariableInstruction ISTORE_0
           
static LocalVariableInstruction ISTORE_1
           
static LocalVariableInstruction ISTORE_2
           
static ArithmeticInstruction ISUB
           
static ArithmeticInstruction IUSHR
           
static ArithmeticInstruction IXOR
           
static ConversionInstruction L2D
           
static ConversionInstruction L2F
           
static ConversionInstruction L2I
           
static ArithmeticInstruction LADD
           
static ArrayInstruction LALOAD
           
static ArithmeticInstruction LAND
           
static ArrayInstruction LASTORE
           
static Instruction LCMP
           
static Instruction LCONST_0
           
static Instruction LCONST_1
           
static ArithmeticInstruction LDIV
           
static ArithmeticInstruction LMUL
           
static ArithmeticInstruction LNEG
           
static ArithmeticInstruction LOR
           
static ArithmeticInstruction LREM
           
static ReturnInstruction LRETURN
           
static ArithmeticInstruction LSHL
           
static ArithmeticInstruction LSHR
           
static ArithmeticInstruction LSUB
           
static ArithmeticInstruction LUSHR
           
static ArithmeticInstruction LXOR
           
static Instruction MONITORENTER
           
static Instruction MONITOREXIT
           
static Instruction NOP
          Predefined instruction objects
static StackInstruction POP
           
static StackInstruction POP2
           
static ReturnInstruction RETURN
           
static ArrayInstruction SALOAD
           
static ArrayInstruction SASTORE
           
static StackInstruction SWAP
           
static LocalVariableInstruction THIS
          You can use these constants in multiple places safely, if you can guarantee that you will never alter their internal values, e.g.
 

Field Detail

NOP

public static final Instruction NOP
Predefined instruction objects

ACONST_NULL

public static final Instruction ACONST_NULL

ICONST_M1

public static final Instruction ICONST_M1

ICONST_0

public static final Instruction ICONST_0

ICONST_1

public static final Instruction ICONST_1

ICONST_2

public static final Instruction ICONST_2

ICONST_3

public static final Instruction ICONST_3

ICONST_4

public static final Instruction ICONST_4

ICONST_5

public static final Instruction ICONST_5

LCONST_0

public static final Instruction LCONST_0

LCONST_1

public static final Instruction LCONST_1

FCONST_0

public static final Instruction FCONST_0

FCONST_1

public static final Instruction FCONST_1

FCONST_2

public static final Instruction FCONST_2

DCONST_0

public static final Instruction DCONST_0

DCONST_1

public static final Instruction DCONST_1

IALOAD

public static final ArrayInstruction IALOAD

LALOAD

public static final ArrayInstruction LALOAD

FALOAD

public static final ArrayInstruction FALOAD

DALOAD

public static final ArrayInstruction DALOAD

AALOAD

public static final ArrayInstruction AALOAD

BALOAD

public static final ArrayInstruction BALOAD

CALOAD

public static final ArrayInstruction CALOAD

SALOAD

public static final ArrayInstruction SALOAD

IASTORE

public static final ArrayInstruction IASTORE

LASTORE

public static final ArrayInstruction LASTORE

FASTORE

public static final ArrayInstruction FASTORE

DASTORE

public static final ArrayInstruction DASTORE

AASTORE

public static final ArrayInstruction AASTORE

BASTORE

public static final ArrayInstruction BASTORE

CASTORE

public static final ArrayInstruction CASTORE

SASTORE

public static final ArrayInstruction SASTORE

POP

public static final StackInstruction POP

POP2

public static final StackInstruction POP2

DUP

public static final StackInstruction DUP

DUP_X1

public static final StackInstruction DUP_X1

DUP_X2

public static final StackInstruction DUP_X2

DUP2

public static final StackInstruction DUP2

DUP2_X1

public static final StackInstruction DUP2_X1

DUP2_X2

public static final StackInstruction DUP2_X2

SWAP

public static final StackInstruction SWAP

IADD

public static final ArithmeticInstruction IADD

LADD

public static final ArithmeticInstruction LADD

FADD

public static final ArithmeticInstruction FADD

DADD

public static final ArithmeticInstruction DADD

ISUB

public static final ArithmeticInstruction ISUB

LSUB

public static final ArithmeticInstruction LSUB

FSUB

public static final ArithmeticInstruction FSUB

DSUB

public static final ArithmeticInstruction DSUB

IMUL

public static final ArithmeticInstruction IMUL

LMUL

public static final ArithmeticInstruction LMUL

FMUL

public static final ArithmeticInstruction FMUL

DMUL

public static final ArithmeticInstruction DMUL

IDIV

public static final ArithmeticInstruction IDIV

LDIV

public static final ArithmeticInstruction LDIV

FDIV

public static final ArithmeticInstruction FDIV

DDIV

public static final ArithmeticInstruction DDIV

IREM

public static final ArithmeticInstruction IREM

LREM

public static final ArithmeticInstruction LREM

FREM

public static final ArithmeticInstruction FREM

DREM

public static final ArithmeticInstruction DREM

INEG

public static final ArithmeticInstruction INEG

LNEG

public static final ArithmeticInstruction LNEG

FNEG

public static final ArithmeticInstruction FNEG

DNEG

public static final ArithmeticInstruction DNEG

ISHL

public static final ArithmeticInstruction ISHL

LSHL

public static final ArithmeticInstruction LSHL

ISHR

public static final ArithmeticInstruction ISHR

LSHR

public static final ArithmeticInstruction LSHR

IUSHR

public static final ArithmeticInstruction IUSHR

LUSHR

public static final ArithmeticInstruction LUSHR

IAND

public static final ArithmeticInstruction IAND

LAND

public static final ArithmeticInstruction LAND

IOR

public static final ArithmeticInstruction IOR

LOR

public static final ArithmeticInstruction LOR

IXOR

public static final ArithmeticInstruction IXOR

LXOR

public static final ArithmeticInstruction LXOR

I2L

public static final ConversionInstruction I2L

I2F

public static final ConversionInstruction I2F

I2D

public static final ConversionInstruction I2D

L2I

public static final ConversionInstruction L2I

L2F

public static final ConversionInstruction L2F

L2D

public static final ConversionInstruction L2D

F2I

public static final ConversionInstruction F2I

F2L

public static final ConversionInstruction F2L

F2D

public static final ConversionInstruction F2D

D2I

public static final ConversionInstruction D2I

D2L

public static final ConversionInstruction D2L

D2F

public static final ConversionInstruction D2F

I2B

public static final ConversionInstruction I2B

I2C

public static final ConversionInstruction I2C

I2S

public static final ConversionInstruction I2S

LCMP

public static final Instruction LCMP

FCMPL

public static final Instruction FCMPL

FCMPG

public static final Instruction FCMPG

DCMPL

public static final Instruction DCMPL

DCMPG

public static final Instruction DCMPG

IRETURN

public static final ReturnInstruction IRETURN

LRETURN

public static final ReturnInstruction LRETURN

FRETURN

public static final ReturnInstruction FRETURN

DRETURN

public static final ReturnInstruction DRETURN

ARETURN

public static final ReturnInstruction ARETURN

RETURN

public static final ReturnInstruction RETURN

ARRAYLENGTH

public static final Instruction ARRAYLENGTH

ATHROW

public static final Instruction ATHROW

MONITORENTER

public static final Instruction MONITORENTER

MONITOREXIT

public static final Instruction MONITOREXIT

THIS

public static final LocalVariableInstruction THIS
You can use these constants in multiple places safely, if you can guarantee that you will never alter their internal values, e.g. call setIndex().

ALOAD_0

public static final LocalVariableInstruction ALOAD_0

ALOAD_1

public static final LocalVariableInstruction ALOAD_1

ALOAD_2

public static final LocalVariableInstruction ALOAD_2

ILOAD_0

public static final LocalVariableInstruction ILOAD_0

ILOAD_1

public static final LocalVariableInstruction ILOAD_1

ILOAD_2

public static final LocalVariableInstruction ILOAD_2

ASTORE_0

public static final LocalVariableInstruction ASTORE_0

ASTORE_1

public static final LocalVariableInstruction ASTORE_1

ASTORE_2

public static final LocalVariableInstruction ASTORE_2

ISTORE_0

public static final LocalVariableInstruction ISTORE_0

ISTORE_1

public static final LocalVariableInstruction ISTORE_1

ISTORE_2

public static final LocalVariableInstruction ISTORE_2

INSTRUCTIONS

public static final Instruction[] INSTRUCTIONS
Get object via its opcode, for immutable instructions like branch instructions entries are set to null.

bla

public static final InstructionConstants.Clinit bla
Interfaces may have no static initializers, so we simulate this with an inner class.