Package org.apache.bcel.generic

Class InvokeInstruction

java.lang.Object

org.apache.bcel.generic.Instruction

org.apache.bcel.generic.CPInstruction

org.apache.bcel.generic.FieldOrMethod

org.apache.bcel.generic.InvokeInstruction

All Implemented Interfaces:

Cloneable, ExceptionThrower, IndexedInstruction, LoadClass, StackConsumer, StackProducer, TypedInstruction

Direct Known Subclasses:

INVOKEDYNAMIC, INVOKEINTERFACE, INVOKESPECIAL, INVOKESTATIC, INVOKEVIRTUAL

public abstract class InvokeInstruction
extends FieldOrMethod
implements ExceptionThrower, StackConsumer, StackProducer

Super class for the INVOKExxx family of instructions.

Field Summary

Fields inherited from class org.apache.bcel.generic.CPInstruction

index

Fields inherited from class org.apache.bcel.generic.Instruction

length, opcode

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	InvokeInstruction(short opcode, int index)

Method Summary

Modifier and Type	Method	Description
int	consumeStack(ConstantPoolGen cpg)	Also works for instructions whose stack effect depends on the constant pool entry they reference.
Type[]	getArgumentTypes(ConstantPoolGen cpg)
String	getClassName(ConstantPoolGen cpg)	This overrides the deprecated version as we know here that the referenced class may legally be an array.
String	getMethodName(ConstantPoolGen cpg)
Type	getReturnType(ConstantPoolGen cpg)
Type	getType(ConstantPoolGen cpg)	Returns the type associated with this instruction.
int	produceStack(ConstantPoolGen cpg)	Also works for instructions whose stack effect depends on the constant pool entry they reference.
String	toString(ConstantPool cp)

Methods inherited from class org.apache.bcel.generic.FieldOrMethod

getClassType, getLoadClassType, getName, getReferenceType, getSignature

Methods inherited from class org.apache.bcel.generic.CPInstruction

dump, getIndex, initFromFile, setIndex, toString

Methods inherited from class org.apache.bcel.generic.Instruction

accept, copy, equals, getComparator, getLength, getName, getOpcode, hashCode, isValidByte, isValidShort, readInstruction, setComparator, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.bcel.generic.ExceptionThrower

getExceptions

Constructor Details

InvokeInstruction

protected InvokeInstruction(short opcode,
 int index)

Parameters:

index - to constant pool

Method Details

consumeStack

public int consumeStack(ConstantPoolGen cpg)

Also works for instructions whose stack effect depends on the constant pool entry they reference.

Specified by:

consumeStack in interface StackConsumer

Overrides:

consumeStack in class Instruction

Returns:

Number of words consumed from stack by this instruction

getArgumentTypes

public Type[] getArgumentTypes(ConstantPoolGen cpg)

Returns:

argument types of referenced method.

getClassName

public String getClassName(ConstantPoolGen cpg)

This overrides the deprecated version as we know here that the referenced class may legally be an array.

Overrides:

getClassName in class FieldOrMethod

Returns:

name of the referenced class/interface

Throws:

IllegalArgumentException - if the referenced class is an array (this should not happen)

getMethodName

public String getMethodName(ConstantPoolGen cpg)

Returns:

name of referenced method.

getReturnType

public Type getReturnType(ConstantPoolGen cpg)

Returns:

return type of referenced method.

getType

public Type getType(ConstantPoolGen cpg)

Description copied from interface: LoadClass

Returns the type associated with this instruction. LoadClass instances are always typed, but this type does not always refer to the type of the class or interface that it possibly forces to load. For example, GETFIELD would return the type of the field and not the type of the class where the field is defined. If no class is forced to be loaded, null is returned. An example for this is an NEWARRAY instruction that creates an int[][].

Specified by:

getType in interface LoadClass

Specified by:

getType in interface TypedInstruction

Overrides:

getType in class CPInstruction

Parameters:

cpg - A ConstantPoolGen

Returns:

return type of referenced method.

See Also:

• LoadClass.getLoadClassType(ConstantPoolGen)

produceStack

public int produceStack(ConstantPoolGen cpg)

Also works for instructions whose stack effect depends on the constant pool entry they reference.

Specified by:

produceStack in interface StackProducer

Overrides:

produceStack in class Instruction

Returns:

Number of words produced onto stack by this instruction

toString

public String toString(ConstantPool cp)

Overrides:

toString in class CPInstruction

Returns:

mnemonic for instruction with symbolic references resolved