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com.chaoswg.xtc4y.classdesc.code.instructions
Class LookupSwitchInstruction  

java.lang.Object
  com.chaoswg.xtc4y.classdesc.code.instructions.Instruction
      com.chaoswg.xtc4y.classdesc.code.instructions.LookupSwitchInstruction

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public class LookupSwitchInstruction

extends Instruction

A Lookup switch instruction is used to represent switch statements. It consists of the command, an int giving the number of entries, an int defining the default jump address and a set of entries where each entry consists of two ints, the case number and the jump address. The end of a LookupSwitch Instruction is aligned to 4 byte and therefore gaps are filled up with nop's. !The empty instructions are filled up before the default jump adress and the numberOfEntries That means: (1byte+4bytes+4bytes+(4bytes+4bytes)*+((index+length)%4))

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Field Summary
private  int[]	cases
private  Instruction	defaultInstr
private  int	defaultJumpAdress
private  java.io.DataInputStream	dis
private  int	gap
private  Instruction[]	jumpInstr
private  int[]	jumps
static byte	LOOKUPSWITCH           Opcode of the lookup switch instructions
private  int	numberOfEntries

 

Fields inherited from class com.chaoswg.xtc4y.classdesc.code.instructions.Instruction

 

Constructor Summary
protected	LookupSwitchInstruction(java.io.DataInputStream dis, com.chaoswg.xtc4y.classdesc.ConstantPool cp)           Creates an LookupSwitchInstruction and initializes it from a DataInputStream

 

Method Summary
int	getNumberOfUsedBytes()
void	resolveIndices(com.chaoswg.xtc4y.classdesc.code.Code code)           Resolve indices of instructions.
void	setIndex(short index)           Set the index of this instruction, is set by the code container
void	write(java.io.DataOutputStream dos, com.chaoswg.xtc4y.classdesc.ConstantPool cp)           Write the instruction onto the DataOutputStream, using the constant pool to register variables.

 

Methods inherited from class com.chaoswg.xtc4y.classdesc.code.instructions.Instruction

getCommand, getIndex, getOpcode, toString

 

Methods inherited from class java.lang.Object

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

 

Field Detail

numberOfEntries

private int numberOfEntries

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defaultJumpAdress

private int defaultJumpAdress

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cases

private int[] cases

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jumps

private int[] jumps

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gap

private int gap

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defaultInstr

private Instruction defaultInstr

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jumpInstr

private Instruction[] jumpInstr

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dis

private java.io.DataInputStream dis

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LOOKUPSWITCH

public static final byte LOOKUPSWITCH

Opcode of the lookup switch instructions

See Also:

Constant Field Values

Constructor Detail

LookupSwitchInstruction

protected LookupSwitchInstruction(java.io.DataInputStream dis,
                                  com.chaoswg.xtc4y.classdesc.ConstantPool cp)
                           throws java.io.IOException

Creates an LookupSwitchInstruction and initializes it from a DataInputStream

Method Detail

setIndex

public void setIndex(short index)

Set the index of this instruction, is set by the code container

Overrides:

setIndex in class Instruction

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resolveIndices

public void resolveIndices(com.chaoswg.xtc4y.classdesc.code.Code code)

Resolve indices of instructions. By default do nothing

Overrides:

resolveIndices in class Instruction

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write

public final void write(java.io.DataOutputStream dos,
                        com.chaoswg.xtc4y.classdesc.ConstantPool cp)
                 throws java.io.IOException

Write the instruction onto the DataOutputStream, using the constant pool to register variables. .

Overrides:

write in class Instruction

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getNumberOfUsedBytes

public int getNumberOfUsedBytes()

Specified by:

getNumberOfUsedBytes in class Instruction

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Overview  Package   Class  Use  Deprecated  Index
Home >> All >> com >> chaoswg >> xtc4y >> classdesc >> code >> [ instructions overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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