Package serp.bytecode

Class ClassInstruction

java.lang.Object

serp.bytecode.Instruction

serp.bytecode.TypedInstruction

serp.bytecode.ClassInstruction

All Implemented Interfaces:

BCEntity, VisitAcceptor

Direct Known Subclasses:

MultiANewArrayInstruction

public class ClassInstruction
extends TypedInstruction

An instruction that takes as an argument a class to operate on. Examples include anewarray, checkcast, instance, anew, etc.

Author:

Abe White

Method Summary

Modifier and Type	Method	Description
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 one.
boolean	equalsInstruction(Instruction other)	ClassInstructions are equal if the type they reference is the same or unset and if their opcodes are equal.
int	getStackChange()	Return the number of stack positions this instruction pushes or pops during its execution.
int	getTypeIndex()	Return the ConstantPool index of the ClassEntry describing the class for this instruction.
java.lang.String	getTypeName()	Return the type name for this instruction.
TypedInstruction	setType(java.lang.String type)	Set the type of this instruction.
ClassInstruction	setTypeIndex(int index)	Set the ConstantPool index of the ClassEntry describing the class for this instruction.

Methods inherited from class serp.bytecode.TypedInstruction

getType, getTypeBC, setType, setType

Methods inherited from class serp.bytecode.Instruction

getByteIndex, getClassLoader, getCode, getLineNumber, getLogicalStackChange, getName, getOpcode, getPool, getProject, isValid

Methods inherited from class java.lang.Object

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

Method Detail

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

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

getTypeIndex

public int getTypeIndex()

Return the ConstantPool index of the ClassEntry describing the class for this instruction.

setTypeIndex

public ClassInstruction setTypeIndex(int index)

Set the ConstantPool index of the ClassEntry describing the class for this instruction.

Returns:

this instruction, for method chaining

getTypeName

public java.lang.String getTypeName()

Description copied from class: TypedInstruction

Return the type name for this instruction. If the type has not been set, this method will return null.

Specified by:

getTypeName in class TypedInstruction

setType

public TypedInstruction setType(java.lang.String type)

Description copied from class: TypedInstruction

Set the type of this instruction. Types that have no direct support will be converted accordingly.

Specified by:

setType in class TypedInstruction

Returns:

this instruction, for method chaining

equalsInstruction

public boolean equalsInstruction(Instruction other)

ClassInstructions are equal if the type they reference is the same or unset and if their opcodes are equal.

Overrides:

equalsInstruction in class Instruction

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 one.

Specified by:

acceptVisit in interface VisitAcceptor

Overrides:

acceptVisit in class Instruction