Package org.apache.bcel.generic

Class FieldOrMethod

java.lang.Object

org.apache.bcel.generic.Instruction

org.apache.bcel.generic.CPInstruction

org.apache.bcel.generic.FieldOrMethod

All Implemented Interfaces:

java.lang.Cloneable, IndexedInstruction, LoadClass, TypedInstruction

Direct Known Subclasses:

FieldInstruction, InvokeInstruction

public abstract class FieldOrMethod
extends CPInstruction
implements LoadClass

Super class for InvokeInstruction and FieldInstruction, since they have some methods in common!

Field Summary

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

index

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

EMPTY_ARRAY, length, opcode

Constructor Summary

Constructors

Modifier	Constructor	Description
(package private)	FieldOrMethod()	Empty constructor needed for Instruction.readInstruction.
protected	FieldOrMethod(short opcode, int index)	Constructs a FieldOrMethod.

Method Summary

Modifier and Type	Method	Description
java.lang.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)	Gets the ObjectType of the method return or field.
java.lang.String	getName(ConstantPoolGen cpg)	Gets the name of referenced method or field.
ReferenceType	getReferenceType(ConstantPoolGen cpg)	Gets the reference type representing the class, interface, or array class referenced by the instruction.
java.lang.String	getSignature(ConstantPoolGen cpg)	Gets the signature of referenced method or field.

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, consumeStack, copy, dispose, equals, getComparator, getLength, getName, getOpcode, hashCode, isValidByte, isValidShort, produceStack, readInstruction, setComparator, setLength, setOpcode, toString

Methods inherited from class java.lang.Object

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

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

getType

Constructor Detail

FieldOrMethod

FieldOrMethod()

Empty constructor needed for Instruction.readInstruction. Not to be used otherwise.

FieldOrMethod

protected FieldOrMethod(short opcode,
                        int index)

Constructs a FieldOrMethod.

Parameters:

opcode - the opcode.

index - to constant pool.

Method Detail

getClassName

@Deprecated
public java.lang.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 (for example, if the "clone()" method is called on an array). A better idea is to use the getReferenceType(ConstantPoolGen) method, which correctly distinguishes between class types and array types.

Gets the name of the referenced class/interface.

Parameters:

cpg - the constant pool generator.

Returns:

name of the referenced class/interface.

getClassType

@Deprecated
public ObjectType getClassType(ConstantPoolGen cpg)

Deprecated.

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

Gets the type of the referenced class/interface.

Parameters:

cpg - the constant pool generator.

Returns:

type of the referenced class/interface.

getLoadClassType

public ObjectType getLoadClassType(ConstantPoolGen cpg)

Gets the ObjectType of the method return or field.

Specified by:

getLoadClassType in interface LoadClass

Parameters:

cpg - the constant pool generator.

Returns:

type of the referenced class/interface.

Throws:

ClassGenException - when the field is (or method returns) an array.

getName

public java.lang.String getName(ConstantPoolGen cpg)

Gets the name of referenced method or field.

Parameters:

cpg - the constant pool generator.

Returns:

name of referenced method/field.

getReferenceType

public ReferenceType getReferenceType(ConstantPoolGen cpg)

Gets 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 java.lang.String getSignature(ConstantPoolGen cpg)

Gets the signature of referenced method or field.

Parameters:

cpg - the constant pool generator.

Returns:

signature of referenced method/field.