org.checkerframework.checker.nullness

Class KeyForPropagationTreeAnnotator

java.lang.Object

com.sun.source.util.SimpleTreeVisitor<Void,AnnotatedTypeMirror>

org.checkerframework.framework.type.treeannotator.TreeAnnotator

org.checkerframework.checker.nullness.KeyForPropagationTreeAnnotator

All Implemented Interfaces:

TreeVisitor<Void,AnnotatedTypeMirror>

public class KeyForPropagationTreeAnnotator
extends TreeAnnotator

For the following initializations we wish to propagate the annotations from the left-hand side to the right-hand side or vice versa:

1. If a keySet is being saved to a newly declared set, we transfer the annotations from the keySet to the lhs. e.g.,

 // The user is not required to explicitly annotate the LHS's type argument with @KeyFor("m")
 Set<String> keySet = m.keySet();
 

2. If a variable declaration contains type arguments with an @KeyFor annotation and its initializer is a new class tree with corresponding type arguments that have an @UknownKeyFor primary annotation, we transfer from the LHS to RHS. e.g.,

 // The user does not have to write @KeyFor("m") on both sides
 List<@KeyFor("m") String> keys = new ArrayList<String>();
 

3. IMPORTANT NOTE: The following case must be (and is) handled in KeyForAnnotatedTypeFactory. In BaseTypeVisitor we check to make sure that the constructor called in a NewClassTree is actually compatible with the annotations placed on the NewClassTree. This requires that, prior to this check we also propagate the annotations to this constructor in constructorFromUse so that the constructor call matches the type given to the NewClassTree.

See Also:

Note propagation only occurs between two AnnotatedDeclaredTypes. If either side is not an AnnotatedDeclaredType then this class does nothing.

Field Summary

Fields inherited from class org.checkerframework.framework.type.treeannotator.TreeAnnotator

atypeFactory

Fields inherited from class com.sun.source.util.SimpleTreeVisitor

DEFAULT_VALUE

Constructor Summary

Constructors

Constructor and Description
KeyForPropagationTreeAnnotator(AnnotatedTypeFactory atypeFactory, KeyForPropagator propagationTreeAnnotator)

Method Summary

Modifier and Type	Method and Description
boolean	isCallToKeyset(ExpressionTree expression) Returns true iff expression is a call to java.util.Map.KeySet.
Void	visitNewClass(NewClassTree node, AnnotatedTypeMirror type) Transfers annotations to type if the left hand side is a variable declaration.
Void	visitVariable(VariableTree variableTree, AnnotatedTypeMirror type) Transfers annotations on type arguments from the initializer to the variableTree, if the initializer is a call to java.util.Map.keySet.

Methods inherited from class org.checkerframework.framework.type.treeannotator.TreeAnnotator

visitBinary, visitMethod

Methods inherited from class com.sun.source.util.SimpleTreeVisitor

defaultAction, visit, visit, visitAnnotatedType, visitAnnotation, visitArrayAccess, visitArrayType, visitAssert, visitAssignment, visitBlock, visitBreak, visitCase, visitCatch, visitClass, visitCompilationUnit, visitCompoundAssignment, visitConditionalExpression, visitContinue, visitDoWhileLoop, visitEmptyStatement, visitEnhancedForLoop, visitErroneous, visitExports, visitExpressionStatement, visitForLoop, visitIdentifier, visitIf, visitImport, visitInstanceOf, visitIntersectionType, visitLabeledStatement, visitLambdaExpression, visitLiteral, visitMemberReference, visitMemberSelect, visitMethodInvocation, visitModifiers, visitModule, visitNewArray, visitOpens, visitOther, visitPackage, visitParameterizedType, visitParenthesized, visitPrimitiveType, visitProvides, visitRequires, visitReturn, visitSwitch, visitSynchronized, visitThrow, visitTry, visitTypeCast, visitTypeParameter, visitUnary, visitUnionType, visitUses, visitWhileLoop, visitWildcard

Methods inherited from class java.lang.Object

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

Constructor Detail

KeyForPropagationTreeAnnotator

public KeyForPropagationTreeAnnotator(AnnotatedTypeFactory atypeFactory,
                                      KeyForPropagator propagationTreeAnnotator)

Method Detail

isCallToKeyset

public boolean isCallToKeyset(ExpressionTree expression)

Returns true iff expression is a call to java.util.Map.KeySet.

Returns:

true iff expression is a call to java.util.Map.KeySet

visitVariable

public Void visitVariable(VariableTree variableTree,
                          AnnotatedTypeMirror type)

Transfers annotations on type arguments from the initializer to the variableTree, if the initializer is a call to java.util.Map.keySet.

Specified by:

visitVariable in interface TreeVisitor<Void,AnnotatedTypeMirror>

Overrides:

visitVariable in class SimpleTreeVisitor<Void,AnnotatedTypeMirror>

visitNewClass

public Void visitNewClass(NewClassTree node,
                          AnnotatedTypeMirror type)

Transfers annotations to type if the left hand side is a variable declaration.

Specified by:

visitNewClass in interface TreeVisitor<Void,AnnotatedTypeMirror>

Overrides:

visitNewClass in class SimpleTreeVisitor<Void,AnnotatedTypeMirror>