BackwardDataflowAnalysis (SpotBugs 4.2.0 API)

java.lang.Object
- edu.umd.cs.findbugs.ba.BasicAbstractDataflowAnalysis<Fact>
- - edu.umd.cs.findbugs.ba.AbstractDataflowAnalysis<Fact>
  - - edu.umd.cs.findbugs.ba.BackwardDataflowAnalysis<Fact>

All Implemented Interfaces:

DataflowAnalysis<Fact>

Direct Known Subclasses:

LiveLocalStoreAnalysis, UnconditionalValueDerefAnalysis
```
public abstract class BackwardDataflowAnalysis<Fact>
extends AbstractDataflowAnalysis<Fact>
```
Abstract base class for backward dataflow analyses. Provides convenient implementations for isForwards() and getBlockOrder() methods.

Author:

David Hovemeyer

See Also:

Dataflow, DataflowAnalysis

Constructor Summary

Constructors
Constructor Description

BackwardDataflowAnalysis(ReverseDepthFirstSearch rdfs, DepthFirstSearch dfs)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`BlockOrder`	`getBlockOrder(CFG cfg)`	Return the BlockOrder specifying the order in which BasicBlocks should be visited in the main dataflow loop.
`protected ReverseDepthFirstSearch`	`getReverseDepthFirstSearch()`
`boolean`	`isForwards()`	Returns true if the analysis is forwards, false if backwards.

Methods inherited from class edu.umd.cs.findbugs.ba.AbstractDataflowAnalysis
getFactAfterLocation, getFactAtLocation, isFactValid, transfer, transferInstruction

Methods inherited from class edu.umd.cs.findbugs.ba.BasicAbstractDataflowAnalysis
edgeTransfer, factToString, finishIteration, getFactOnEdge, getLastUpdateTimestamp, getResultFact, getStartFact, resultFactIterator, setLastUpdateTimestamp, startIteration

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

Methods inherited from interface edu.umd.cs.findbugs.ba.DataflowAnalysis
copy, createFact, initEntryFact, isTop, makeFactTop, meetInto, same

- Constructor Detail
  - BackwardDataflowAnalysis
```
public BackwardDataflowAnalysis(ReverseDepthFirstSearch rdfs,
                                DepthFirstSearch dfs)
```
- Method Detail
  - getReverseDepthFirstSearch
```
protected ReverseDepthFirstSearch getReverseDepthFirstSearch()
```
  - isForwards
```
public boolean isForwards()
```
    Description copied from interface: DataflowAnalysis
    
    Returns true if the analysis is forwards, false if backwards.
  - getBlockOrder
```
public BlockOrder getBlockOrder(CFG cfg)
```
    Description copied from interface: DataflowAnalysis
    
    Return the BlockOrder specifying the order in which BasicBlocks should be visited in the main dataflow loop.
    
    Parameters:
    
    cfg - the CFG upon which we're performing dataflow analysis