org.gjt.jclasslib.bytecode
Class AbstractInstruction

java.lang.Object
  |
  +--org.gjt.jclasslib.bytecode.AbstractInstruction

All Implemented Interfaces:

Opcodes

Direct Known Subclasses:

BranchInstruction, ImmediateByteInstruction, ImmediateIntInstruction, ImmediateShortInstruction, PaddedInstruction, SimpleInstruction

public abstract class AbstractInstruction

extends Object

implements Opcodes

Base class for all opcode instruction wrappers.

Version:

$Revision: 1.5 $ $Date: 2003/08/18 07:58:35 $

Author:

Ingo Kegel

Field Summary

Fields inherited from interface org.gjt.jclasslib.bytecode.Opcodes

NEWARRAY_T_BOOLEAN, NEWARRAY_T_BYTE, NEWARRAY_T_CHAR, NEWARRAY_T_DOUBLE, NEWARRAY_T_FLOAT, NEWARRAY_T_INT, NEWARRAY_T_LONG, NEWARRAY_T_SHORT, OPCODE_AALOAD, OPCODE_AASTORE, OPCODE_ACONST_NULL, OPCODE_ALOAD, OPCODE_ALOAD_0, OPCODE_ALOAD_1, OPCODE_ALOAD_2, OPCODE_ALOAD_3, OPCODE_ANEWARRAY, OPCODE_ARETURN, OPCODE_ARRAYLENGTH, OPCODE_ASTORE, OPCODE_ASTORE_0, OPCODE_ASTORE_1, OPCODE_ASTORE_2, OPCODE_ASTORE_3, OPCODE_ATHROW, OPCODE_BALOAD, OPCODE_BASTORE, OPCODE_BIPUSH, OPCODE_BREAKPOINT, OPCODE_CALOAD, OPCODE_CASTORE, OPCODE_CHECKCAST, OPCODE_D2F, OPCODE_D2I, OPCODE_D2L, OPCODE_DADD, OPCODE_DALOAD, OPCODE_DASTORE, OPCODE_DCMPG, OPCODE_DCMPL, OPCODE_DCONST_0, OPCODE_DCONST_1, OPCODE_DDIV, OPCODE_DLOAD, OPCODE_DLOAD_0, OPCODE_DLOAD_1, OPCODE_DLOAD_2, OPCODE_DLOAD_3, OPCODE_DMUL, OPCODE_DNEG, OPCODE_DREM, OPCODE_DRETURN, OPCODE_DSTORE, OPCODE_DSTORE_0, OPCODE_DSTORE_1, OPCODE_DSTORE_2, OPCODE_DSTORE_3, OPCODE_DSUB, OPCODE_DUP, OPCODE_DUP_X1, OPCODE_DUP_X2, OPCODE_DUP2, OPCODE_DUP2_X1, OPCODE_DUP2_X2, OPCODE_F2D, OPCODE_F2I, OPCODE_F2L, OPCODE_FADD, OPCODE_FALOAD, OPCODE_FASTORE, OPCODE_FCMPG, OPCODE_FCMPL, OPCODE_FCONST_0, OPCODE_FCONST_1, OPCODE_FCONST_2, OPCODE_FDIV, OPCODE_FLOAD, OPCODE_FLOAD_0, OPCODE_FLOAD_1, OPCODE_FLOAD_2, OPCODE_FLOAD_3, OPCODE_FMUL, OPCODE_FNEG, OPCODE_FREM, OPCODE_FRETURN, OPCODE_FSTORE, OPCODE_FSTORE_0, OPCODE_FSTORE_1, OPCODE_FSTORE_2, OPCODE_FSTORE_3, OPCODE_FSUB, OPCODE_GETFIELD, OPCODE_GETSTATIC, OPCODE_GOTO, OPCODE_GOTO_W, OPCODE_I2B, OPCODE_I2C, OPCODE_I2D, OPCODE_I2F, OPCODE_I2L, OPCODE_I2S, OPCODE_IADD, OPCODE_IALOAD, OPCODE_IAND, OPCODE_IASTORE, OPCODE_ICONST_0, OPCODE_ICONST_1, OPCODE_ICONST_2, OPCODE_ICONST_3, OPCODE_ICONST_4, OPCODE_ICONST_5, OPCODE_ICONST_M1, OPCODE_IDIV, OPCODE_IF_ACMPEQ, OPCODE_IF_ACMPNE, OPCODE_IF_ICMPEQ, OPCODE_IF_ICMPGE, OPCODE_IF_ICMPGT, OPCODE_IF_ICMPLE, OPCODE_IF_ICMPLT, OPCODE_IF_ICMPNE, OPCODE_IFEQ, OPCODE_IFGE, OPCODE_IFGT, OPCODE_IFLE, OPCODE_IFLT, OPCODE_IFNE, OPCODE_IFNONNULL, OPCODE_IFNULL, OPCODE_IINC, OPCODE_ILOAD, OPCODE_ILOAD_0, OPCODE_ILOAD_1, OPCODE_ILOAD_2, OPCODE_ILOAD_3, OPCODE_IMPDEP1, OPCODE_IMPDEP2, OPCODE_IMUL, OPCODE_INEG, OPCODE_INSTANCEOF, OPCODE_INVOKEINTERFACE, OPCODE_INVOKESPECIAL, OPCODE_INVOKESTATIC, OPCODE_INVOKEVIRTUAL, OPCODE_IOR, OPCODE_IREM, OPCODE_IRETURN, OPCODE_ISHL, OPCODE_ISHR, OPCODE_ISTORE, OPCODE_ISTORE_0, OPCODE_ISTORE_1, OPCODE_ISTORE_2, OPCODE_ISTORE_3, OPCODE_ISUB, OPCODE_IUSHR, OPCODE_IXOR, OPCODE_JSR, OPCODE_JSR_W, OPCODE_L2D, OPCODE_L2F, OPCODE_L2I, OPCODE_LADD, OPCODE_LALOAD, OPCODE_LAND, OPCODE_LASTORE, OPCODE_LCMP, OPCODE_LCONST_0, OPCODE_LCONST_1, OPCODE_LDC, OPCODE_LDC_W, OPCODE_LDC2_W, OPCODE_LDIV, OPCODE_LLOAD, OPCODE_LLOAD_0, OPCODE_LLOAD_1, OPCODE_LLOAD_2, OPCODE_LLOAD_3, OPCODE_LMUL, OPCODE_LNEG, OPCODE_LOOKUPSWITCH, OPCODE_LOR, OPCODE_LREM, OPCODE_LRETURN, OPCODE_LSHL, OPCODE_LSHR, OPCODE_LSTORE, OPCODE_LSTORE_0, OPCODE_LSTORE_1, OPCODE_LSTORE_2, OPCODE_LSTORE_3, OPCODE_LSUB, OPCODE_LUSHR, OPCODE_LXOR, OPCODE_MONITORENTER, OPCODE_MONITOREXIT, OPCODE_MULTIANEWARRAY, OPCODE_NEW, OPCODE_NEWARRAY, OPCODE_NOP, OPCODE_POP, OPCODE_POP2, OPCODE_PUTFIELD, OPCODE_PUTSTATIC, OPCODE_RET, OPCODE_RETURN, OPCODE_SALOAD, OPCODE_SASTORE, OPCODE_SIPUSH, OPCODE_SWAP, OPCODE_TABLESWITCH, OPCODE_WIDE, OPCODE_XXXUNUSEDXXX

Constructor Summary

protected

AbstractInstruction(int opcode) Constructor.

Method Summary

int	getOffset() Get the offset of this instruction in its parent Code attribute.
int	getOpcode() Get the opcode of this instruction.
String	getOpcodeVerbose() Get the verbose description of the opcode of this instruction.
int	getSize() Get the size in bytes of this instruction.
void	read(ByteCodeInput in) Read this instruction from the given ByteCodeInput.
void	setOffset(int offset) Set the offset of this instruction in its parent Code attribute.
void	setOpcode(int opcode) Set the opcode of this instruction.
void	write(ByteCodeOutput out) Write this instruction to the given ByteCodeOutput.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractInstruction

protected AbstractInstruction(int opcode)

Constructor.

Parameters:

opcode - the opcode.

Method Detail

getSize

public int getSize()

Get the size in bytes of this instruction.

Returns:

the size in bytes

getOpcode

public int getOpcode()

Get the opcode of this instruction.

Returns:

the opcode

setOpcode

public void setOpcode(int opcode)

Set the opcode of this instruction.

Parameters:

opcode - the opcode

getOpcodeVerbose

public String getOpcodeVerbose()

Get the verbose description of the opcode of this instruction.

Returns:

the description

getOffset

public int getOffset()

Get the offset of this instruction in its parent Code attribute.

Returns:

the offset

setOffset

public void setOffset(int offset)

Set the offset of this instruction in its parent Code attribute.

Parameters:

offset - the offset

read

public void read(ByteCodeInput in)
          throws IOException

Read this instruction from the given ByteCodeInput.

Excpects ByteCodeInput to be in JVM class file format and just before a instruction of this kind.

Parameters:

in - the ByteCodeInput from which to read

Throws:

IOException - if an exception occurs with the ByteCodeInput

write

public void write(ByteCodeOutput out)
           throws IOException

Write this instruction to the given ByteCodeOutput.

Parameters:

out - the ByteCodeOutput to which to write

Throws:

IOException - if an exception occurs with the ByteCodeOutput