org.apache.bcel.verifier.structurals

Class ControlFlowGraph

public class ControlFlowGraph extends Object

This class represents a control flow graph of a method.

Version: $Id: ControlFlowGraph.java 386056 2006-03-15 11:31:56Z tcurdt $

Author: Enver Haase

Nested Class Summary
class	ControlFlowGraph.InstructionContextImpl Objects of this class represent a node in a ControlFlowGraph.

Field Summary
ExceptionHandlers	exceptionhandlers The ExceptionHandlers object for the method whose control flow is represented by this ControlFlowGraph.
Hashtable	instructionContexts All InstructionContext instances of this ControlFlowGraph.
MethodGen	method_gen The MethodGen object we're working on.
Subroutines	subroutines The Subroutines object for the method whose control flow is represented by this ControlFlowGraph.

Constructor Summary
	ControlFlowGraph(MethodGen method_gen) A Control Flow Graph.

Method Summary
InstructionContext	contextOf(InstructionHandle inst) Returns the InstructionContext of a given instruction.
InstructionContext[]	contextsOf(InstructionHandle[] insts) Returns the InstructionContext[] of a given InstructionHandle[], in a naturally ordered manner.
InstructionContext[]	getInstructionContexts() Returns an InstructionContext[] with all the InstructionContext instances for the method whose control flow is represented by this ControlFlowGraph (NOT ORDERED!)
boolean	isDead(InstructionHandle i) Returns true, if and only if the said instruction is not reachable; that means, if it is not part of this ControlFlowGraph.

Field Detail

exceptionhandlers

private final ExceptionHandlers exceptionhandlers

The ExceptionHandlers object for the method whose control flow is represented by this ControlFlowGraph.

instructionContexts

private Hashtable instructionContexts

All InstructionContext instances of this ControlFlowGraph.

method_gen

private final MethodGen method_gen

The MethodGen object we're working on.

subroutines

private final Subroutines subroutines

The Subroutines object for the method whose control flow is represented by this ControlFlowGraph.

Constructor Detail

ControlFlowGraph

public ControlFlowGraph(MethodGen method_gen)

A Control Flow Graph.

Method Detail

contextOf

public InstructionContext contextOf(InstructionHandle inst)

Returns the InstructionContext of a given instruction.

contextsOf

public InstructionContext[] contextsOf(InstructionHandle[] insts)

Returns the InstructionContext[] of a given InstructionHandle[], in a naturally ordered manner.

getInstructionContexts

public InstructionContext[] getInstructionContexts()

Returns an InstructionContext[] with all the InstructionContext instances for the method whose control flow is represented by this ControlFlowGraph (NOT ORDERED!).

isDead

public boolean isDead(InstructionHandle i)

Returns true, if and only if the said instruction is not reachable; that means, if it is not part of this ControlFlowGraph.