java.lang.Object
- proguard.classfile.util.BranchTargetFinder

All Implemented Interfaces:

AttributeVisitor, ExceptionInfoVisitor, ConstantVisitor, InstructionVisitor
```
public class BranchTargetFinder
extends java.lang.Object
implements AttributeVisitor, InstructionVisitor, ExceptionInfoVisitor, ConstantVisitor
```
This AttributeVisitor finds all instruction offsets, branch targets, and exception targets in the CodeAttribute instances that it visits.

Field Summary

Fields
Modifier and Type Field Description

static int NO_SUBROUTINE

static int UNKNOWN

Constructor Summary

Constructors
Constructor Description

BranchTargetFinder()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`containsSubroutines()`	Returns whether the method contains subroutines, in the CodeAttribute that was visited most recently.
`boolean`	`isAfterBranch(int offset)`	Returns whether the instruction at the given offset comes right after a definite branch instruction in the CodeAttribute that was visited most recently.
`boolean`	`isBranchOrigin(int offset)`	Returns whether the instruction at the given offset is the origin of a branch instruction in the CodeAttribute that was visited most recently.
`boolean`	`isBranchTarget(int offset)`	Returns whether the instruction at the given offset is the target of a branch instruction in the CodeAttribute that was visited most recently.
`boolean`	`isCreation(int offset)`	Returns whether the instruction at the given offset creates a new, uninitialized object instance, in the CodeAttribute that was visited most recently.
`boolean`	`isExceptionEnd(int offset)`	Returns whether the instruction at the given offset is the end of an exception try block in the CodeAttribute that was visited most recently.
`boolean`	`isExceptionHandler(int offset)`	Returns whether the instruction at the given offset is the start of an exception handler in the CodeAttribute that was visited most recently.
`boolean`	`isExceptionStart(int offset)`	Returns whether the instruction at the given offset is the start of an exception try block in the CodeAttribute that was visited most recently.
`boolean`	`isInitializer(int offset)`	Returns whether the instruction at the given offset is the special invocation of an instance initializer, in the CodeAttribute that was visited most recently.
`boolean`	`isInstruction(int offset)`	Returns whether there is an instruction at the given offset in the CodeAttribute that was visited most recently.
`boolean`	`isSubroutine(int offset)`	Returns whether the instruction at the given offset is part of a subroutine in the CodeAttribute that was visited most recently.
`boolean`	`isSubroutineInvocation(int offset)`	Returns whether the instruction at the given offset is a subroutine invocation in the CodeAttribute that was visited most recently.
`boolean`	`isSubroutineReturning(int offset)`	Returns whether the subroutine at the given offset is ever returning by means of a regular 'ret' instruction.
`boolean`	`isSubroutineStart(int offset)`	Returns whether the instruction at the given offset is the start of a subroutine in the CodeAttribute that was visited most recently.
`boolean`	`isTarget(int offset)`	Returns whether the instruction at the given offset is the target of any kind in the CodeAttribute that was visited most recently.
`int`	`subroutineEnd(int offset)`	Returns the offset after the subroutine at the given offset, in the CodeAttribute that was visited most recently.
`int`	`subroutineStart(int offset)`	Returns the start offset of the subroutine at the given offset, in the CodeAttribute that was visited most recently.
`void`	`visitAnyAttribute(Clazz clazz, Attribute attribute)`	Visits any Attribute instance.
`void`	`visitAnyConstant(Clazz clazz, Constant constant)`	Visits any Constant instance.
`void`	`visitAnySwitchInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, SwitchInstruction switchInstruction)`	Visits any SwitchInstruction instance.
`void`	`visitBranchInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, BranchInstruction branchInstruction)`
`void`	`visitCodeAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute)`
`void`	`visitConstantInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, ConstantInstruction constantInstruction)`
`void`	`visitExceptionInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, ExceptionInfo exceptionInfo)`
`void`	`visitMethodrefConstant(Clazz clazz, MethodrefConstant methodrefConstant)`
`void`	`visitSimpleInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, SimpleInstruction simpleInstruction)`
`void`	`visitVariableInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, VariableInstruction variableInstruction)`

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

Methods inherited from interface proguard.classfile.attribute.visitor.AttributeVisitor
visitAnnotationDefaultAttribute, visitAnyAnnotationsAttribute, visitAnyParameterAnnotationsAttribute, visitAnyTypeAnnotationsAttribute, visitBootstrapMethodsAttribute, visitConstantValueAttribute, visitDeprecatedAttribute, visitDeprecatedAttribute, visitDeprecatedAttribute, visitDeprecatedAttribute, visitEnclosingMethodAttribute, visitExceptionsAttribute, visitInnerClassesAttribute, visitLineNumberTableAttribute, visitLocalVariableTableAttribute, visitLocalVariableTypeTableAttribute, visitMethodParametersAttribute, visitModuleAttribute, visitModuleMainClassAttribute, visitModulePackagesAttribute, visitNestHostAttribute, visitNestMembersAttribute, visitPermittedSubclassesAttribute, visitRecordAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleParameterAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleParameterAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitSignatureAttribute, visitSignatureAttribute, visitSignatureAttribute, visitSignatureAttribute, visitSignatureAttribute, visitSourceDebugExtensionAttribute, visitSourceDirAttribute, visitSourceFileAttribute, visitStackMapAttribute, visitStackMapTableAttribute, visitSyntheticAttribute, visitSyntheticAttribute, visitSyntheticAttribute, visitSyntheticAttribute, visitUnknownAttribute

Methods inherited from interface proguard.classfile.constant.visitor.ConstantVisitor
visitAnyMethodrefConstant, visitAnyRefConstant, visitClassConstant, visitDoubleConstant, visitDynamicConstant, visitFieldrefConstant, visitFloatConstant, visitIntegerConstant, visitInterfaceMethodrefConstant, visitInvokeDynamicConstant, visitLongConstant, visitMethodHandleConstant, visitMethodTypeConstant, visitModuleConstant, visitNameAndTypeConstant, visitPackageConstant, visitPrimitiveArrayConstant, visitStringConstant, visitUtf8Constant

Methods inherited from interface proguard.classfile.instruction.visitor.InstructionVisitor
visitAnyInstruction, visitLookUpSwitchInstruction, visitTableSwitchInstruction

- Field Detail
  - UNKNOWN
```
public static final int UNKNOWN
```
    See Also:
    
    Constant Field Values
  - NO_SUBROUTINE
```
public static final int NO_SUBROUTINE
```
    See Also:
    
    Constant Field Values
- Constructor Detail
  - BranchTargetFinder
```
public BranchTargetFinder()
```
- Method Detail
  - isInstruction
```
public boolean isInstruction(int offset)
```
    Returns whether there is an instruction at the given offset in the CodeAttribute that was visited most recently.
  - isCreation
```
public boolean isCreation(int offset)
```
    Returns whether the instruction at the given offset creates a new, uninitialized object instance, in the CodeAttribute that was visited most recently.
  - isInitializer
```
public boolean isInitializer(int offset)
```
    Returns whether the instruction at the given offset is the special invocation of an instance initializer, in the CodeAttribute that was visited most recently.
  - isTarget
```
public boolean isTarget(int offset)
```
    Returns whether the instruction at the given offset is the target of any kind in the CodeAttribute that was visited most recently.
  - isBranchOrigin
```
public boolean isBranchOrigin(int offset)
```
    Returns whether the instruction at the given offset is the origin of a branch instruction in the CodeAttribute that was visited most recently.
  - isBranchTarget
```
public boolean isBranchTarget(int offset)
```
    Returns whether the instruction at the given offset is the target of a branch instruction in the CodeAttribute that was visited most recently.
  - isAfterBranch
```
public boolean isAfterBranch(int offset)
```
    Returns whether the instruction at the given offset comes right after a definite branch instruction in the CodeAttribute that was visited most recently.
  - isExceptionStart
```
public boolean isExceptionStart(int offset)
```
    Returns whether the instruction at the given offset is the start of an exception try block in the CodeAttribute that was visited most recently.
  - isExceptionEnd
```
public boolean isExceptionEnd(int offset)
```
    Returns whether the instruction at the given offset is the end of an exception try block in the CodeAttribute that was visited most recently.
  - isExceptionHandler
```
public boolean isExceptionHandler(int offset)
```
    Returns whether the instruction at the given offset is the start of an exception handler in the CodeAttribute that was visited most recently.
  - isSubroutineInvocation
```
public boolean isSubroutineInvocation(int offset)
```
    Returns whether the instruction at the given offset is a subroutine invocation in the CodeAttribute that was visited most recently.
  - isSubroutineStart
```
public boolean isSubroutineStart(int offset)
```
    Returns whether the instruction at the given offset is the start of a subroutine in the CodeAttribute that was visited most recently.
  - isSubroutine
```
public boolean isSubroutine(int offset)
```
    Returns whether the instruction at the given offset is part of a subroutine in the CodeAttribute that was visited most recently.
  - isSubroutineReturning
```
public boolean isSubroutineReturning(int offset)
```
    Returns whether the subroutine at the given offset is ever returning by means of a regular 'ret' instruction.
  - subroutineStart
```
public int subroutineStart(int offset)
```
    Returns the start offset of the subroutine at the given offset, in the CodeAttribute that was visited most recently.
  - subroutineEnd
```
public int subroutineEnd(int offset)
```
    Returns the offset after the subroutine at the given offset, in the CodeAttribute that was visited most recently.
  - containsSubroutines
```
public boolean containsSubroutines()
```
    Returns whether the method contains subroutines, in the CodeAttribute that was visited most recently.
  - visitAnyAttribute
```
public void visitAnyAttribute(Clazz clazz,
                              Attribute attribute)
```
    Description copied from interface: AttributeVisitor
    
    Visits any Attribute instance. The more specific default implementations of this interface delegate to this method.
    
    Specified by:
    
    visitAnyAttribute in interface AttributeVisitor
  - visitCodeAttribute
```
public void visitCodeAttribute(Clazz clazz,
                               Method method,
                               CodeAttribute codeAttribute)
```
    Specified by:
    
    visitCodeAttribute in interface AttributeVisitor
  - visitSimpleInstruction
```
public void visitSimpleInstruction(Clazz clazz,
                                   Method method,
                                   CodeAttribute codeAttribute,
                                   int offset,
                                   SimpleInstruction simpleInstruction)
```
    Specified by:
    
    visitSimpleInstruction in interface InstructionVisitor
  - visitConstantInstruction
```
public void visitConstantInstruction(Clazz clazz,
                                     Method method,
                                     CodeAttribute codeAttribute,
                                     int offset,
                                     ConstantInstruction constantInstruction)
```
    Specified by:
    
    visitConstantInstruction in interface InstructionVisitor
  - visitVariableInstruction
```
public void visitVariableInstruction(Clazz clazz,
                                     Method method,
                                     CodeAttribute codeAttribute,
                                     int offset,
                                     VariableInstruction variableInstruction)
```
    Specified by:
    
    visitVariableInstruction in interface InstructionVisitor
  - visitBranchInstruction
```
public void visitBranchInstruction(Clazz clazz,
                                   Method method,
                                   CodeAttribute codeAttribute,
                                   int offset,
                                   BranchInstruction branchInstruction)
```
    Specified by:
    
    visitBranchInstruction in interface InstructionVisitor
  - visitAnySwitchInstruction
```
public void visitAnySwitchInstruction(Clazz clazz,
                                      Method method,
                                      CodeAttribute codeAttribute,
                                      int offset,
                                      SwitchInstruction switchInstruction)
```
    Description copied from interface: InstructionVisitor
    
    Visits any SwitchInstruction instance. The more specific default implementations of this interface delegate to this method.
    
    Specified by:
    
    visitAnySwitchInstruction in interface InstructionVisitor
  - visitAnyConstant
```
public void visitAnyConstant(Clazz clazz,
                             Constant constant)
```
    Description copied from interface: ConstantVisitor
    
    Visits any Constant instance. The more specific default implementations of this interface delegate to this method.
    
    Specified by:
    
    visitAnyConstant in interface ConstantVisitor
  - visitMethodrefConstant
```
public void visitMethodrefConstant(Clazz clazz,
                                   MethodrefConstant methodrefConstant)
```
    Specified by:
    
    visitMethodrefConstant in interface ConstantVisitor
  - visitExceptionInfo
```
public void visitExceptionInfo(Clazz clazz,
                               Method method,
                               CodeAttribute codeAttribute,
                               ExceptionInfo exceptionInfo)
```
    Specified by:
    
    visitExceptionInfo in interface ExceptionInfoVisitor

Fields
Modifier and Type	Field	Description
`static int`	`NO_SUBROUTINE`
`static int`	`UNKNOWN`

Class BranchTargetFinder

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface proguard.classfile.attribute.visitor.AttributeVisitor

Methods inherited from interface proguard.classfile.constant.visitor.ConstantVisitor

Methods inherited from interface proguard.classfile.instruction.visitor.InstructionVisitor

Field Detail

UNKNOWN

NO_SUBROUTINE

Constructor Detail

BranchTargetFinder

Method Detail

isInstruction

isCreation

isInitializer

isTarget

isBranchOrigin

isBranchTarget

isAfterBranch

isExceptionStart

isExceptionEnd

isExceptionHandler

isSubroutineInvocation

isSubroutineStart

isSubroutine

isSubroutineReturning

subroutineStart

subroutineEnd

containsSubroutines

visitAnyAttribute

visitCodeAttribute

visitSimpleInstruction

visitConstantInstruction

visitVariableInstruction

visitBranchInstruction

visitAnySwitchInstruction

visitAnyConstant

visitMethodrefConstant

visitExceptionInfo