org.apache.bcel.generic

Class FieldOrMethod

Implemented Interfaces:
Cloneable, IndexedInstruction, LoadClass, Serializable, TypedInstruction
Known Direct Subclasses:
FieldInstruction, InvokeInstruction

public abstract class FieldOrMethod
extends CPInstruction
implements LoadClass

Super class for InvokeInstruction and FieldInstruction, since they have some methods in common!
Version:
$Id: FieldOrMethod.java 386056 2006-03-15 11:31:56Z tcurdt $
Author:
M. Dahm

Field Summary

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

index

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

cmp, length, opcode

Constructor Summary

FieldOrMethod()
Empty constructor needed for the Class.newInstance() statement in Instruction.readInstruction().
FieldOrMethod(short opcode, int index)

Method Summary

String
getClassName(ConstantPoolGen cpg)
Deprecated. If the instruction references an array class, this method will return "java.lang.Object".
ObjectType
getClassType(ConstantPoolGen cpg)
Deprecated. If the instruction references an array class, the ObjectType returned will be invalid.
ObjectType
getLoadClassType(ConstantPoolGen cpg)
String
getName(ConstantPoolGen cpg)
ReferenceType
getReferenceType(ConstantPoolGen cpg)
Return the reference type representing the class, interface, or array class referenced by the instruction.
String
getSignature(ConstantPoolGen cpg)

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

dump, getIndex, getType, initFromFile, setIndex, toString, toString

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

accept, className, consumeStack, copy, dispose, dump, equals, getComparator, getLength, getName, getOpcode, initFromFile, produceStack, readInstruction, setComparator, setOpcode, toString, toString, toString

Constructor Details

FieldOrMethod

(package private)  FieldOrMethod()
Empty constructor needed for the Class.newInstance() statement in Instruction.readInstruction(). Not to be used otherwise.

FieldOrMethod

protected FieldOrMethod(short opcode,
                        int index)
Parameters:
index - to constant pool

Method Details

getClassName

public String getClassName(ConstantPoolGen cpg)

Deprecated. If the instruction references an array class, this method will return "java.lang.Object". For code generated by Java 1.5, this answer is sometimes wrong (e.g., if the "clone()" method is called on an array). A better idea is to use the getReferenceType() method, which correctly distinguishes between class types and array types.

Returns:
name of the referenced class/interface

getClassType

public ObjectType getClassType(ConstantPoolGen cpg)

Deprecated. If the instruction references an array class, the ObjectType returned will be invalid. Use getReferenceType() instead.

Returns:
type of the referenced class/interface

getLoadClassType

public ObjectType getLoadClassType(ConstantPoolGen cpg)
Specified by:
getLoadClassType in interface LoadClass
Returns:
type of the referenced class/interface

getName

public String getName(ConstantPoolGen cpg)
Returns:
name of referenced method/field.

getReferenceType

public ReferenceType getReferenceType(ConstantPoolGen cpg)
Return the reference type representing the class, interface, or array class referenced by the instruction.
Parameters:
cpg - the ConstantPoolGen used to create the instruction
Returns:
an ObjectType (if the referenced class type is a class or interface), or an ArrayType (if the referenced class type is an array class)

getSignature

public String getSignature(ConstantPoolGen cpg)
Returns:
signature of referenced method/field.