com.techtrader.modules.tools.bytecode
Class LoadInstruction

java.lang.Object
  |
  +--com.techtrader.modules.tools.bytecode.Instruction
        |
        +--com.techtrader.modules.tools.bytecode.LocalVariableInstruction
              |
              +--com.techtrader.modules.tools.bytecode.TypedLocalVariableInstruction
                    |
                    +--com.techtrader.modules.tools.bytecode.LoadInstruction

public class LoadInstruction

extends TypedLocalVariableInstruction

Represents an instruction to load a value from a local variable onto the stack; can be any of aload_*, iload_*, etc.

Author:

Abe White

Fields inherited from class com.techtrader.modules.tools.bytecode.TypedLocalVariableInstruction

_type, _typeNames

Fields inherited from class com.techtrader.modules.tools.bytecode.LocalVariableInstruction

_index

Fields inherited from class com.techtrader.modules.tools.bytecode.Instruction

_byteIndex, _opcode, _opcodeTypes, _owner

Constructor Summary

protected	LoadInstruction(Code owner)
protected	LoadInstruction(Code owner, int opcode, Class type, int index)

Method Summary

void	acceptVisit(BCVisitor visit) Accept a visit from a BCVisitor, calling the appropriate methods to notify the visitor that it has entered this entity, and to provide it with the proper callbacks for each sub-entity owned by this object.
protected void	calculateOpCode() Subclasses with variable opcodes can use this method to be notified that information possibly affecting the opcode has been changed.
boolean	equals(Object other) Two local variable instructions are equal if the local index they reference is equal and their types are equal, or if either index is 0/unset.
int	getLength() Return the length in bytes of this opcode, including all arguments.
int	getStackChange() Return the number of stack positions this instruction pushes or pops during its execution.
protected void	readData(DataInput in) Read the arguments for this opcode from the given stream.
protected void	writeData(DataOutput out) Write the arguments for this opcode to the given stream.

Methods inherited from class com.techtrader.modules.tools.bytecode.TypedLocalVariableInstruction

copy, getType, getTypeName, setType, setTypeName

Methods inherited from class com.techtrader.modules.tools.bytecode.LocalVariableInstruction

getIndex, setIndex

Methods inherited from class com.techtrader.modules.tools.bytecode.Instruction

getByteIndex, getName, getOpCode, getOwner, invalidate, setByteIndex, setOpCode

Methods inherited from class java.lang.Object

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

Constructor Detail

LoadInstruction

protected LoadInstruction(Code owner)

LoadInstruction

protected LoadInstruction(Code owner,
                          int opcode,
                          Class type,
                          int index)

Method Detail

equals

public boolean equals(Object other)

Description copied from class: TypedLocalVariableInstruction

Two local variable instructions are equal if the local index they reference is equal and their types are equal, or if either index is 0/unset.

Overrides:

equals in class TypedLocalVariableInstruction

getLength

public int getLength()

Description copied from class: Instruction

Return the length in bytes of this opcode, including all arguments. This method should be overridden by opcodes that take arguments.

Overrides:

getLength in class Instruction

getStackChange

public int getStackChange()

Description copied from class: Instruction

Return the number of stack positions this instruction pushes or pops during its execution.

Overrides:

getStackChange in class Instruction

Tags copied from class: Instruction

Returns:

0 if the stack is not affected by this instruction, a positive number if it pushes onto the stack, and a negative number if it pops from the stack

readData

protected void readData(DataInput in)
                 throws IOException

Description copied from class: Instruction

Read the arguments for this opcode from the given stream. This method should be overridden by opcodes that take arguments.

Overrides:

readData in class Instruction

writeData

protected void writeData(DataOutput out)
                  throws IOException

Description copied from class: Instruction

Write the arguments for this opcode to the given stream. This method should be overridden by opcodes that take arguments.

Overrides:

writeData in class Instruction

calculateOpCode

protected void calculateOpCode()

Description copied from class: LocalVariableInstruction

Subclasses with variable opcodes can use this method to be notified that information possibly affecting the opcode has been changed.

Overrides:

calculateOpCode in class LocalVariableInstruction

acceptVisit

public void acceptVisit(BCVisitor visit)

Description copied from interface: VisitAcceptor

Accept a visit from a BCVisitor, calling the appropriate methods to notify the visitor that it has entered this entity, and to provide it with the proper callbacks for each sub-entity owned by this object.

Overrides:

acceptVisit in class Instruction