Package org.checkerframework.checker.nullness

Class NullnessAnalysis

java.lang.Object

org.checkerframework.dataflow.analysis.AbstractAnalysis<V,S,T>

org.checkerframework.dataflow.analysis.ForwardAnalysisImpl<V,S,T>

org.checkerframework.framework.flow.CFAbstractAnalysis<NullnessValue,NullnessStore,NullnessTransfer>

org.checkerframework.checker.nullness.NullnessAnalysis

All Implemented Interfaces:

Analysis<NullnessValue,NullnessStore,NullnessTransfer>, ForwardAnalysis<NullnessValue,NullnessStore,NullnessTransfer>

public class NullnessAnalysis
extends CFAbstractAnalysis<NullnessValue,NullnessStore,NullnessTransfer>

The analysis class for the non-null type system (serves as factory for the transfer function, stores and abstract values.

Nested Class Summary

Nested classes/interfaces inherited from class org.checkerframework.framework.flow.CFAbstractAnalysis

CFAbstractAnalysis.FieldInitialValue<V extends CFAbstractValue<V>>

Nested classes/interfaces inherited from class org.checkerframework.dataflow.analysis.AbstractAnalysis

AbstractAnalysis.Worklist

Nested classes/interfaces inherited from interface org.checkerframework.dataflow.analysis.Analysis

Analysis.BeforeOrAfter, Analysis.Direction

Field Summary

Fields inherited from class org.checkerframework.framework.flow.CFAbstractAnalysis

atypeFactory, checker, dependentTypesHelper, env, fieldValues, qualHierarchy, typeHierarchy, types

Fields inherited from class org.checkerframework.dataflow.analysis.ForwardAnalysisImpl

blockCount, elseStores, maxCountBeforeWidening, storesAtReturnStatements, thenStores

Fields inherited from class org.checkerframework.dataflow.analysis.AbstractAnalysis

cfg, currentInput, currentNode, currentTree, direction, finalLocalValues, inputs, isRunning, nodeValues, transferFunction, worklist

Constructor Summary

Constructors

Constructor	Description
NullnessAnalysis(BaseTypeChecker checker, NullnessAnnotatedTypeFactory factory)	Creates a new NullnessAnalysis.

Method Summary

Modifier and Type	Method	Description
@Nullable NullnessValue	createAbstractValue(AnnotationMirrorSet annotations, TypeMirror underlyingType)	Returns an abstract value containing the given annotations and underlyingType.
NullnessStore	createCopiedStore(NullnessStore s)	Returns an identical copy of the store s.
NullnessStore	createEmptyStore(boolean sequentialSemantics)	Returns an empty store of the appropriate type.

Methods inherited from class org.checkerframework.framework.flow.CFAbstractAnalysis

createAbstractValue, createSingleAnnotationValue, createTransferFunction, defaultCreateAbstractValue, getEnv, getFieldInitialValues, getTypeFactory, getTypeHierarchy, getTypes, performAnalysis

Methods inherited from class org.checkerframework.dataflow.analysis.ForwardAnalysisImpl

addStoreBefore, callTransferFunction, getInput, getInputBefore, getReturnStatementStores, getStoreBefore, initFields, initInitialInputs, performAnalysis, performAnalysisBlock, propagateStoresTo, runAnalysisFor

Methods inherited from class org.checkerframework.dataflow.analysis.AbstractAnalysis

addToWorklist, getContainingClass, getContainingMethod, getCurrentTree, getDirection, getExceptionalExitStore, getNodesForTree, getNodeValues, getRegularExitStore, getResult, getTransferFunction, getValue, getValue, init, isIgnoredExceptionType, isRunning, readFromStore, setCurrentNode, setCurrentTree, updateNodeValues

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.checkerframework.dataflow.analysis.Analysis

getDirection, getExceptionalExitStore, getRegularExitStore, getResult, getTransferFunction, getValue, getValue, isRunning

Constructor Details

NullnessAnalysis

public NullnessAnalysis(BaseTypeChecker checker,
 NullnessAnnotatedTypeFactory factory)

Creates a new NullnessAnalysis.

Parameters:

checker - the checker

factory - the factory

Method Details

createEmptyStore

public NullnessStore createEmptyStore(boolean sequentialSemantics)

Description copied from class: CFAbstractAnalysis

Returns an empty store of the appropriate type.

Specified by:

createEmptyStore in class CFAbstractAnalysis<NullnessValue,NullnessStore,NullnessTransfer>

Returns:

an empty store of the appropriate type

createCopiedStore

public NullnessStore createCopiedStore(NullnessStore s)

Description copied from class: CFAbstractAnalysis

Returns an identical copy of the store s.

Specified by:

createCopiedStore in class CFAbstractAnalysis<NullnessValue,NullnessStore,NullnessTransfer>

Returns:

an identical copy of the store s

createAbstractValue

public @Nullable NullnessValue createAbstractValue(AnnotationMirrorSet annotations,
 TypeMirror underlyingType)

Description copied from class: CFAbstractAnalysis

Returns an abstract value containing the given annotations and underlyingType. Returns null if the annotation set has missing annotations.

Specified by:

createAbstractValue in class CFAbstractAnalysis<NullnessValue,NullnessStore,NullnessTransfer>

Parameters:

annotations - the annotations for the result annotated type

underlyingType - the unannotated type for the result annotated type

Returns:

an abstract value containing the given annotations and underlyingType