edu.umd.cs.findbugs.ba.type2
Class BetterTypeAnalysis

java.lang.Object
  extended by edu.umd.cs.findbugs.ba.AbstractDataflowAnalysis<Fact>
      extended by edu.umd.cs.findbugs.ba.ForwardDataflowAnalysis<FrameType>
          extended by edu.umd.cs.findbugs.ba.FrameDataflowAnalysis<Type,BetterTypeFrame>
              extended by edu.umd.cs.findbugs.ba.type2.BetterTypeAnalysis
All Implemented Interfaces:
DataflowAnalysis<BetterTypeFrame>

public class BetterTypeAnalysis
extends FrameDataflowAnalysis<Type,BetterTypeFrame>


Constructor Summary
BetterTypeAnalysis(org.apache.bcel.generic.MethodGen methodGen, java.lang.String[] parameterSignatureList, CFG cfg, DepthFirstSearch dfs, TypeRepository typeRepository, TypeMerger typeMerger, RepositoryLookupFailureCallback lookupFailureCallback)
           
 
Method Summary
 BetterTypeFrame createFact()
          Create empty (uninitialized) dataflow facts for one program point.
 void initEntryFact(BetterTypeFrame result)
          Initialize the "entry" fact for the graph.
 void meetInto(BetterTypeFrame fact, Edge edge, BetterTypeFrame result)
          Meet a dataflow fact associated with an incoming edge into another fact.
protected  void mergeValues(BetterTypeFrame otherFrame, BetterTypeFrame resultFrame, int slot)
          Merge the values contained in a given slot of two Frames.
 void transferInstruction(org.apache.bcel.generic.InstructionHandle handle, BasicBlock basicBlock, BetterTypeFrame fact)
          Transfer function for a single instruction.
 
Methods inherited from class edu.umd.cs.findbugs.ba.FrameDataflowAnalysis
copy, initResultFact, isFactValid, makeFactTop, mergeInto, modifyFrame, same
 
Methods inherited from class edu.umd.cs.findbugs.ba.ForwardDataflowAnalysis
getBlockOrder, getDepthFirstSearch, isForwards
 
Methods inherited from class edu.umd.cs.findbugs.ba.AbstractDataflowAnalysis
endTransfer, factToString, getFactAfterLocation, getFactAtLocation, getResultFact, getStartFact, resultFactIterator, startTransfer, transfer
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

BetterTypeAnalysis

public BetterTypeAnalysis(org.apache.bcel.generic.MethodGen methodGen,
                          java.lang.String[] parameterSignatureList,
                          CFG cfg,
                          DepthFirstSearch dfs,
                          TypeRepository typeRepository,
                          TypeMerger typeMerger,
                          RepositoryLookupFailureCallback lookupFailureCallback)
Method Detail

createFact

public BetterTypeFrame createFact()
Description copied from interface: DataflowAnalysis
Create empty (uninitialized) dataflow facts for one program point. A valid value will be copied into it before it is used.


initEntryFact

public void initEntryFact(BetterTypeFrame result)
                   throws DataflowAnalysisException
Description copied from interface: DataflowAnalysis
Initialize the "entry" fact for the graph.

Throws:
DataflowAnalysisException

transferInstruction

public void transferInstruction(org.apache.bcel.generic.InstructionHandle handle,
                                BasicBlock basicBlock,
                                BetterTypeFrame fact)
                         throws DataflowAnalysisException
Description copied from class: AbstractDataflowAnalysis
Transfer function for a single instruction.

Specified by:
transferInstruction in class AbstractDataflowAnalysis<BetterTypeFrame>
Parameters:
handle - the instruction
basicBlock - the BasicBlock containing the instruction; needed to disambiguate instructions in inlined JSR subroutines
fact - which should be modified based on the instruction
Throws:
DataflowAnalysisException

meetInto

public void meetInto(BetterTypeFrame fact,
                     Edge edge,
                     BetterTypeFrame result)
              throws DataflowAnalysisException
Description copied from interface: DataflowAnalysis
Meet a dataflow fact associated with an incoming edge into another fact. This is used to determine the start fact for a basic block.

Parameters:
fact - the predecessor fact (incoming edge)
edge - the edge from the predecessor
result - the result fact
Throws:
DataflowAnalysisException

mergeValues

protected void mergeValues(BetterTypeFrame otherFrame,
                           BetterTypeFrame resultFrame,
                           int slot)
                    throws DataflowAnalysisException
Description copied from class: FrameDataflowAnalysis
Merge the values contained in a given slot of two Frames.

Specified by:
mergeValues in class FrameDataflowAnalysis<Type,BetterTypeFrame>
Parameters:
otherFrame - a Frame
resultFrame - a Frame which will contain the resulting merged value
slot - a slot in both frames
Throws:
DataflowAnalysisException