Package edu.umd.cs.findbugs.ba

Class InnerClassAccessMap.InstructionCallback

java.lang.Object

edu.umd.cs.findbugs.ba.InnerClassAccessMap.InstructionCallback

All Implemented Interfaces:

BytecodeScanner.Callback

Enclosing class:

InnerClassAccessMap

private static class InnerClassAccessMap.InstructionCallback
extends java.lang.Object
implements BytecodeScanner.Callback

Callback to scan an access method to determine what field it accesses, and whether the field is loaded or stored.

Field Summary

Fields

Modifier and Type	Field	Description
private InnerClassAccess	access
private int	accessCount
private byte[]	instructionList
private org.apache.bcel.classfile.JavaClass	javaClass
private java.lang.String	methodName
private java.lang.String	methodSig

Constructor Summary

Constructors

Constructor	Description
InstructionCallback(org.apache.bcel.classfile.JavaClass javaClass, java.lang.String methodName, java.lang.String methodSig, byte[] instructionList)	Constructor.

Method Summary

Modifier and Type	Method	Description
InnerClassAccess	getAccess()	Get the InnerClassAccess object representing the method.
void	handleInstruction(int opcode, int index)	Called to indicate that a particular bytecode has been scanned.
private boolean	isValidAccessMethod(java.lang.String methodSig, XField field, boolean isLoad)	Determine if the method appears to be an accessor of the expected form.
private void	setField(int cpIndex, boolean isStatic, boolean isLoad)	Called to indicate that a field load or store was encountered.

Methods inherited from class java.lang.Object

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

Field Detail

javaClass

private final org.apache.bcel.classfile.JavaClass javaClass

methodName

private final java.lang.String methodName

methodSig

private final java.lang.String methodSig

instructionList

private final byte[] instructionList

access

private InnerClassAccess access

accessCount

private int accessCount

Constructor Detail

InstructionCallback

public InstructionCallback(org.apache.bcel.classfile.JavaClass javaClass,
                           java.lang.String methodName,
                           java.lang.String methodSig,
                           byte[] instructionList)

Constructor.

Parameters:

javaClass - the class containing the access method

methodName - the name of the access method

methodSig - the signature of the access method

instructionList - the bytecode of the method

Method Detail

handleInstruction

public void handleInstruction(int opcode,
                              int index)

Description copied from interface: BytecodeScanner.Callback

Called to indicate that a particular bytecode has been scanned.

Specified by:

handleInstruction in interface BytecodeScanner.Callback

Parameters:

opcode - the opcode of the instruction

index - the bytecode offset of the instruction

getAccess

public InnerClassAccess getAccess()

Get the InnerClassAccess object representing the method.

Returns:

the InnerClassAccess, or null if the method was not found to be a simple load or store in the expected form

setField

private void setField(int cpIndex,
                      boolean isStatic,
                      boolean isLoad)

Called to indicate that a field load or store was encountered.

Parameters:

cpIndex - the constant pool index of the fieldref

isStatic - true if it is a static field access

isLoad - true if the access is a load

isValidAccessMethod

private boolean isValidAccessMethod(java.lang.String methodSig,
                                    XField field,
                                    boolean isLoad)

Determine if the method appears to be an accessor of the expected form. This has only been tested with the Sun JDK 1.4 javac (definitely) and jikes 1.18 (I think).

Parameters:

methodSig - the method's signature

field - the field accessed by the method

isLoad - true if the access is a load