java.lang.Object
- edu.umd.cs.findbugs.visitclass.BetterVisitor
- - edu.umd.cs.findbugs.visitclass.PreorderVisitor
  - - edu.umd.cs.findbugs.visitclass.AnnotationVisitor
    - - edu.umd.cs.findbugs.visitclass.DismantleBytecode

All Implemented Interfaces:

org.apache.bcel.classfile.Visitor

Direct Known Subclasses:

BytecodeScanningDetector, CloneIdiom, NoteDirectlyRelevantTypeQualifiers
```
public abstract class DismantleBytecode
extends AnnotationVisitor
```

Field Summary

Fields
Modifier and Type	Field	Description
`private int`	`branchFallThrough`
`private int`	`branchOffset`
`private int`	`branchTarget`
`private java.lang.String`	`classConstantOperand`
`protected byte[]`	`codeBytes`
`private org.apache.bcel.classfile.Constant`	`constantRefOperand`
`private int`	`currentPosInPrevOpcodeBuffer`
`private int`	`defaultSwitchOffset`
`private java.lang.String`	`dottedClassConstantOperand`
`private double`	`doubleConstant`
`private float`	`floatConstant`
`private static java.text.NumberFormat`	`formatter`
`private int`	`intConstant`
`private static int`	`INVALID_OFFSET`
`private boolean`	`isRegisterLoad`
`private boolean`	`isRegisterStore`
`protected org.apache.bcel.classfile.LineNumberTable`	`lineNumberTable`
`private long`	`longConstant`
`static byte`	`M_BR`
`static byte`	`M_CP`
`static byte`	`M_INT`	Meaning of bytecode operands
`static byte`	`M_PAD`
`static byte`	`M_R`
`static byte`	`M_UINT`
`(package private) static byte[][]`	`MEANING_OF_OPERANDS`	Meaning of bytecode operands
`private java.lang.String`	`nameConstantOperand`
`private int`	`nextPC`
`private static java.lang.String`	`NOT_AVAILABLE`
`private int`	`opcode`
`private boolean`	`opcodeIsWide`
`private int`	`PC`
`private int[]`	`prevOpcode`
`private java.lang.String`	`refConstantOperand`
`private ClassDescriptor`	`referencedClass`
`private FieldDescriptor`	`referencedField`
`private MethodDescriptor`	`referencedMethod`
`private XClass`	`referencedXClass`
`private XField`	`referencedXField`
`private XMethod`	`referencedXMethod`
`private boolean`	`refFieldIsStatic`
`private int`	`registerOperand`
`private java.lang.String`	`sigConstantOperand`
`private int`	`sizePrevOpcodeBuffer`
`private java.lang.String`	`stringConstantOperand`
`private int[]`	`switchLabels`
`private int[]`	`switchOffsets`

Fields inherited from class edu.umd.cs.findbugs.visitclass.AnnotationVisitor
DEBUG

Fields inherited from class edu.umd.cs.findbugs.visitclass.PreorderVisitor
argumentSignature, visitMethodsInCallOrder

Constructor Summary

Constructors
Constructor Description

DismantleBytecode()

Method Summary

All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`void`	`afterOpcode(int seen)`
`static boolean`	`areOppositeBranches(int opcode1, int opcode2)`
`boolean`	`atCatchBlock()`
`boolean`	`beforeOpcode(int seen)`	return false if we should skip calling sawOpcode
`int`	`getBranchFallThrough()`
`int`	`getBranchOffset()`
`int`	`getBranchTarget()`
`java.lang.String`	`getClassConstantOperand()`	If the current opcode has a class constant operand, get the classname, slash-formatted.
`ClassDescriptor`	`getClassDescriptorOperand()`
`int`	`getCodeByte(int offset)`
`org.apache.bcel.classfile.Constant`	`getConstantRefOperand()`
`int`	`getDefaultSwitchOffset()`
`java.lang.String`	`getDottedClassConstantOperand()`	If the current opcode has a class operand, get the associated class constant, dot-formatted
`FieldDescriptor`	`getFieldDescriptorOperand()`
`int`	`getIntConstant()`
`long`	`getLongConstant()`
`int`	`getMaxPC()`
`MethodDescriptor`	`getMethodDescriptorOperand()`
`java.lang.String`	`getNameConstantOperand()`	If the current opcode has a reference constant operand, get its name
`int`	`getNextCodeByte(int offset)`
`int`	`getNextOpcode()`
`int`	`getNextPC()`
`int`	`getOpcode()`
`int`	`getPC()`
`int`	`getPrevOpcode(int offset)`	return previous opcode;
`java.lang.String`	`getRefConstantOperand()`	Deprecated.
`private XClass`	`getReferencedXClass()`
`boolean`	`getRefFieldIsStatic()`
`int`	`getRegisterOperand()`
`java.lang.String`	`getSigConstantOperand()`	If the current opcode has a reference constant operand, get its signature, slash-formatted
`java.lang.String`	`getStringConstantOperand()`	If the current opcode has a string constant operand, get its name
`int[]`	`getSwitchLabels()`
`int[]`	`getSwitchOffsets()`
`XClass`	`getXClassOperand()`
`XField`	`getXFieldOperand()`
`XMethod`	`getXMethodOperand()`
`static boolean`	`isBranch(int opcode)`	Return whether or not given opcode is a branch instruction.
`boolean`	`isMethodCall()`
`boolean`	`isRegisterLoad()`
`boolean`	`isRegisterStore()`
`boolean`	`isRegisterStore(int opcode)`
`boolean`	`isReturn(int opcode)`
`boolean`	`isShift(int opcode)`
`static boolean`	`isSwitch(int opcode)`	Return whether or not given opcode is a switch instruction.
`boolean`	`isWideOpcode()`
`void`	`printOpCode(int seen)`
`private void`	`resetState()`
`void`	`sawBranchTo(int targetPC)`
`void`	`sawClass()`
`void`	`sawDouble(double seen)`
`void`	`sawField()`
`void`	`sawFloat(float seen)`
`void`	`sawIMethod()`
`void`	`sawInt(int seen)`
`void`	`sawLong(long seen)`
`void`	`sawMethod()`
`void`	`sawOpcode(int seen)`
`void`	`sawRegister(int r)`
`void`	`sawString(java.lang.String seen)`
`private static void`	`sortByOffset(int[] switchOffsets, int[] switchLabels)`
`void`	`visit(org.apache.bcel.classfile.Code obj)`

Methods inherited from class edu.umd.cs.findbugs.visitclass.AnnotationVisitor
getAnnotationParameterAsEnum, getAnnotationParameterAsString, getAnnotationParameterAsStringArray, visitAnnotation, visitAnnotation, visitParameterAnnotation, visitParameterAnnotation, visitSyntheticParameterAnnotation

Methods inherited from class edu.umd.cs.findbugs.visitclass.PreorderVisitor
amVisitingMainMethod, asUnsignedByte, doVisitMethod, getClassDescriptor, getClassName, getCode, getConstantPool, getDottedClassName, getDottedFieldSig, getDottedMethodSig, getDottedSuperclassName, getField, getFieldDescriptor, getFieldIsStatic, getFieldName, getFieldSig, getFullyQualifiedFieldName, getFullyQualifiedMethodName, getMethod, getMethodDescriptor, getMethodName, getMethodSig, getMethodVisitOrder, getNumberArguments, getNumberMethodArguments, getPackageName, getSizeOfSurroundingTryBlock, getSizeOfSurroundingTryBlock, getSourceFile, getStringFromIndex, getSuperclassName, getSurroundingCaughtExceptions, getSurroundingCaughtExceptions, getSurroundingCaughtExceptionTypes, getSurroundingTryBlock, getSurroundingTryBlock, getThisClass, getXClass, getXField, getXMethod, hasInterestingClass, hasInterestingMethod, isVisitMethodsInCallOrder, setupVisitorForClass, setVisitMethodsInCallOrder, shouldVisit, toString, visitAfter, visitAfter, visitAnnotationDefault, visitAnnotationEntry, visitBootstrapMethods, visitCode, visitConstantInvokeDynamic, visitConstantMethodHandle, visitConstantMethodType, visitConstantModule, visitConstantPackage, visitConstantPool, visitEnclosingMethod, visitingField, visitingMethod, visitInnerClasses, visitJavaClass, visitLineNumberTable, visitLocalVariableTable, visitMethodParameters, visitParameterAnnotationEntry, visitStackMap, visitStackMapEntry

Methods inherited from class edu.umd.cs.findbugs.visitclass.BetterVisitor
clone, report, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visitCodeException, visitConstantClass, visitConstantDouble, visitConstantFieldref, visitConstantFloat, visitConstantInteger, visitConstantInterfaceMethodref, visitConstantLong, visitConstantMethodref, visitConstantNameAndType, visitConstantString, visitConstantUtf8, visitConstantValue, visitDeprecated, visitExceptionTable, visitField, visitInnerClass, visitLineNumber, visitLocalVariable, visitLocalVariableTypeTable, visitMethod, visitSignature, visitSourceFile, visitSynthetic, visitUnknown

Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.bcel.classfile.Visitor
visitConstantDynamic, visitMethodParameter, visitModule, visitModuleExports, visitModuleMainClass, visitModuleOpens, visitModulePackages, visitModuleProvides, visitModuleRequires, visitNestHost, visitNestMembers, visitRecord, visitRecordComponent, visitStackMapType

Field Detail

opcode
```
private int opcode
```

opcodeIsWide
```
private boolean opcodeIsWide
```

PC
```
private int PC
```

nextPC
```
private int nextPC
```

branchOffset
```
private int branchOffset
```

branchTarget
```
private int branchTarget
```

branchFallThrough
```
private int branchFallThrough
```

switchOffsets
```
private int[] switchOffsets
```

switchLabels
```
private int[] switchLabels
```

prevOpcode
```
private final int[] prevOpcode
```

currentPosInPrevOpcodeBuffer

private int currentPosInPrevOpcodeBuffer

sizePrevOpcodeBuffer
```
private int sizePrevOpcodeBuffer
```

defaultSwitchOffset
```
private int defaultSwitchOffset
```

classConstantOperand

@SlashedClassName
private java.lang.String classConstantOperand

referencedClass

private ClassDescriptor referencedClass

referencedXClass
```
private XClass referencedXClass
```

referencedMethod

private MethodDescriptor referencedMethod

referencedXMethod
```
private XMethod referencedXMethod
```

referencedField

private FieldDescriptor referencedField

referencedXField
```
private XField referencedXField
```

dottedClassConstantOperand

private java.lang.String dottedClassConstantOperand

nameConstantOperand

private java.lang.String nameConstantOperand

sigConstantOperand

private java.lang.String sigConstantOperand

stringConstantOperand

private java.lang.String stringConstantOperand

refConstantOperand

private java.lang.String refConstantOperand

refFieldIsStatic
```
private boolean refFieldIsStatic
```

constantRefOperand

private org.apache.bcel.classfile.Constant constantRefOperand

intConstant
```
private int intConstant
```

longConstant
```
private long longConstant
```

floatConstant
```
private float floatConstant
```

doubleConstant
```
private double doubleConstant
```

registerOperand
```
private int registerOperand
```

isRegisterLoad
```
private boolean isRegisterLoad
```

isRegisterStore
```
private boolean isRegisterStore
```

INVALID_OFFSET
```
private static final int INVALID_OFFSET
```
See Also:

Constant Field Values

NOT_AVAILABLE

private static final java.lang.String NOT_AVAILABLE

See Also:: Constant Field Values

M_INT
```
public static final byte M_INT
```
Meaning of bytecode operands

See Also:

Constant Field Values

M_UINT
```
public static final byte M_UINT
```
See Also:

Constant Field Values

M_CP
```
public static final byte M_CP
```
See Also:

Constant Field Values

M_R
```
public static final byte M_R
```
See Also:

Constant Field Values

M_BR
```
public static final byte M_BR
```
See Also:

Constant Field Values

M_PAD
```
public static final byte M_PAD
```
See Also:

Constant Field Values

MEANING_OF_OPERANDS
```
static final byte[][] MEANING_OF_OPERANDS
```
Meaning of bytecode operands

codeBytes
```
protected byte[] codeBytes
```

lineNumberTable

protected org.apache.bcel.classfile.LineNumberTable lineNumberTable

formatter

private static final java.text.NumberFormat formatter

Constructor Detail
- DismantleBytecode
```
public DismantleBytecode()
```

Method Detail

getClassDescriptorOperand

public ClassDescriptor getClassDescriptorOperand()

getXClassOperand

@CheckForNull
public XClass getXClassOperand()

isMethodCall
```
public boolean isMethodCall()
```

getMethodDescriptorOperand

public MethodDescriptor getMethodDescriptorOperand()

getXMethodOperand

@CheckForNull
public XMethod getXMethodOperand()

getFieldDescriptorOperand

public FieldDescriptor getFieldDescriptorOperand()

getXFieldOperand

@CheckForNull
public XField getXFieldOperand()

getDottedClassConstantOperand
```
public java.lang.String getDottedClassConstantOperand()
```
If the current opcode has a class operand, get the associated class constant, dot-formatted

getRefConstantOperand
```
@Deprecated
public java.lang.String getRefConstantOperand()
```
Deprecated.

If the current opcode has a reference constant operand, get its string representation

getNameConstantOperand
```
public java.lang.String getNameConstantOperand()
```
If the current opcode has a reference constant operand, get its name

getSigConstantOperand
```
public java.lang.String getSigConstantOperand()
```
If the current opcode has a reference constant operand, get its signature, slash-formatted

getClassConstantOperand
```
@SlashedClassName
public java.lang.String getClassConstantOperand()
```
If the current opcode has a class constant operand, get the classname, slash-formatted.

getStringConstantOperand
```
public java.lang.String getStringConstantOperand()
```
If the current opcode has a string constant operand, get its name

getConstantRefOperand

public org.apache.bcel.classfile.Constant getConstantRefOperand()

isRegisterLoad
```
public boolean isRegisterLoad()
```

isRegisterStore
```
public boolean isRegisterStore()
```

getRegisterOperand
```
public int getRegisterOperand()
```

getIntConstant
```
public int getIntConstant()
```

getLongConstant
```
public long getLongConstant()
```

getBranchOffset
```
public int getBranchOffset()
```

getBranchTarget
```
public int getBranchTarget()
```

getBranchFallThrough
```
public int getBranchFallThrough()
```

getDefaultSwitchOffset
```
public int getDefaultSwitchOffset()
```

getRefFieldIsStatic
```
public boolean getRefFieldIsStatic()
```

getPC
```
public int getPC()
```

getPrevOpcode
```
public int getPrevOpcode(int offset)
```
return previous opcode;

Parameters:

offset - 0 for current opcode, 1 for one before that, etc.

isWideOpcode
```
public boolean isWideOpcode()
```

isBranch
```
public static boolean isBranch(int opcode)
```
Return whether or not given opcode is a branch instruction.

Parameters:

opcode - the opcode

Returns:

true if instruction is a branch, false if not

isSwitch
```
public static boolean isSwitch(int opcode)
```
Return whether or not given opcode is a switch instruction.

Parameters:

opcode - the opcode

Returns:

true if instruction is a switch, false if not

getSwitchOffsets
```
public int[] getSwitchOffsets()
```

getSwitchLabels
```
public int[] getSwitchLabels()
```

resetState
```
private void resetState()
```

sortByOffset

private static void sortByOffset(int[] switchOffsets,
                                 int[] switchLabels)

getMaxPC
```
public int getMaxPC()
```

getCodeByte

public int getCodeByte(int offset)

getOpcode
```
public int getOpcode()
```

atCatchBlock
```
public boolean atCatchBlock()
```

visit

public void visit(org.apache.bcel.classfile.Code obj)

Overrides:: visit in class BetterVisitor

sawDouble

public void sawDouble(double seen)

sawFloat
```
public void sawFloat(float seen)
```

sawRegister
```
public void sawRegister(int r)
```

sawInt
```
public void sawInt(int seen)
```

sawLong
```
public void sawLong(long seen)
```

sawBranchTo

public void sawBranchTo(int targetPC)

beforeOpcode
```
public boolean beforeOpcode(int seen)
```
return false if we should skip calling sawOpcode

afterOpcode
```
public void afterOpcode(int seen)
```

sawOpcode
```
public void sawOpcode(int seen)
```

sawString

public void sawString(java.lang.String seen)

sawField
```
public void sawField()
```

sawMethod
```
public void sawMethod()
```

sawIMethod
```
public void sawIMethod()
```

sawClass
```
public void sawClass()
```

printOpCode
```
public void printOpCode(int seen)
```

getNextPC
```
public int getNextPC()
```
Returns:

Returns the nextPC.

getNextOpcode
```
public int getNextOpcode()
```

getNextCodeByte

public int getNextCodeByte(int offset)

isReturn

public boolean isReturn(int opcode)

isShift

public boolean isShift(int opcode)

areOppositeBranches

public static boolean areOppositeBranches(int opcode1,
                                          int opcode2)

isRegisterStore

public boolean isRegisterStore(int opcode)

getReferencedXClass
```
private XClass getReferencedXClass()
```
Returns:

Returns the referencedXClass.

Class DismantleBytecode

Field Summary

Fields inherited from class edu.umd.cs.findbugs.visitclass.AnnotationVisitor

Fields inherited from class edu.umd.cs.findbugs.visitclass.PreorderVisitor

Constructor Summary

Method Summary

Methods inherited from class edu.umd.cs.findbugs.visitclass.AnnotationVisitor

Methods inherited from class edu.umd.cs.findbugs.visitclass.PreorderVisitor

Methods inherited from class edu.umd.cs.findbugs.visitclass.BetterVisitor

Methods inherited from class java.lang.Object

Methods inherited from interface org.apache.bcel.classfile.Visitor

Field Detail

opcode

opcodeIsWide

PC

nextPC

branchOffset

branchTarget

branchFallThrough

switchOffsets

switchLabels

prevOpcode

currentPosInPrevOpcodeBuffer

sizePrevOpcodeBuffer

defaultSwitchOffset

classConstantOperand

referencedClass

referencedXClass

referencedMethod

referencedXMethod

referencedField

referencedXField

dottedClassConstantOperand

nameConstantOperand

sigConstantOperand

stringConstantOperand

refConstantOperand

refFieldIsStatic

constantRefOperand

intConstant

longConstant

floatConstant

doubleConstant

registerOperand

isRegisterLoad

isRegisterStore

INVALID_OFFSET

NOT_AVAILABLE

M_INT

M_UINT

M_CP

M_R

M_BR

M_PAD

MEANING_OF_OPERANDS

codeBytes

lineNumberTable

formatter

Constructor Detail

DismantleBytecode

Method Detail

getClassDescriptorOperand

getXClassOperand

isMethodCall

getMethodDescriptorOperand

getXMethodOperand

getFieldDescriptorOperand

getXFieldOperand

getDottedClassConstantOperand

getRefConstantOperand

getNameConstantOperand

getSigConstantOperand

getClassConstantOperand

getStringConstantOperand

getConstantRefOperand

isRegisterLoad

isRegisterStore

getRegisterOperand

getIntConstant

getLongConstant