Package org.apache.bcel.generic

Class FieldInstruction

java.lang.Object

org.apache.bcel.generic.Instruction

org.apache.bcel.generic.CPInstruction

org.apache.bcel.generic.FieldOrMethod

org.apache.bcel.generic.FieldInstruction

All Implemented Interfaces:

Cloneable, IndexedInstruction, LoadClass, TypedInstruction

Direct Known Subclasses:

GETFIELD, GETSTATIC, PUTFIELD, PUTSTATIC

public abstract class FieldInstruction
extends FieldOrMethod

Super class for the GET/PUTxxx 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	FieldInstruction(short opcode, int index)

Method Summary

Modifier and Type	Method	Description
String	getFieldName(ConstantPoolGen cpg)
protected int	getFieldSize(ConstantPoolGen cpg)
Type	getFieldType(ConstantPoolGen cpg)
Type	getType(ConstantPoolGen cpg)	Returns the type associated with this instruction.
String	toString(ConstantPool cp)

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

getClassName, 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, consumeStack, copy, equals, getComparator, getLength, getName, getOpcode, hashCode, isValidByte, isValidShort, produceStack, readInstruction, setComparator, toString

Methods inherited from class java.lang.Object

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

Constructor Details

FieldInstruction

protected FieldInstruction(short opcode,
 int index)

Parameters:

index - to constant pool

Method Details

getFieldName

public String getFieldName(ConstantPoolGen cpg)

Returns:

name of referenced field.

getFieldSize

protected int getFieldSize(ConstantPoolGen cpg)

Returns:

size of field (1 or 2)

getFieldType

public Type getFieldType(ConstantPoolGen cpg)

Returns:

type of field

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 field

See Also:

• LoadClass.getLoadClassType(ConstantPoolGen)

toString

public String toString(ConstantPool cp)

Overrides:

toString in class CPInstruction

Returns:

mnemonic for instruction with symbolic references resolved