checkers.interning
Class InterningVisitor

java.lang.Object
  com.sun.source.util.TreeScanner<R,P>
      com.sun.source.util.TreePathScanner<R,P>
          checkers.source.SourceVisitor<R,P>
              checkers.basetype.BaseTypeVisitor<Void,Void>
                  checkers.interning.InterningVisitor

All Implemented Interfaces:

TreeVisitor<Void,Void>

public final class InterningVisitor
extends BaseTypeVisitor<Void,Void>

A type-checking visitor for the Interned type qualifier that uses the BaseTypeVisitor implementation. This visitor reports errors or warnings for violations for the following cases:

1. either argument to a "==" or "!=" comparison is not Interned (error "not.interned")
2. the receiver and argument for a call to an equals method are both Interned (optional warning "unnecessary.equals")

See Also:

BaseTypeVisitor

Field Summary

Fields inherited from class checkers.basetype.BaseTypeVisitor

annoFactory, annoTypes, checker, visitorState

Fields inherited from class checkers.source.SourceVisitor

atypeFactory, elements, root, trees, types

Constructor Summary

InterningVisitor(InterningChecker checker, CompilationUnitTree root)
Creates a new visitor for type-checking Interned.

Method Summary

Void	visitBinary(BinaryTree node, Void p)
Void	visitMethodInvocation(MethodInvocationTree node, Void p) Performs a method invocation check.

Methods inherited from class checkers.basetype.BaseTypeVisitor

checkArguments, checkArrayInitialization, checkAssignability, checkConstructorInvocation, checkMethodInvocability, checkOverride, checkTypeArguments, checkTypecastSafety, commonAssignmentCheck, commonAssignmentCheck, commonAssignmentCheck, scan, shouldSkip, shouldSkip, validateTypeOf, visitAnnotation, visitAssignment, visitClass, visitCompilationUnit, visitCompoundAssignment, visitEnhancedForLoop, visitInstanceOf, visitMethod, visitNewArray, visitNewClass, visitParameterizedType, visitReturn, visitTypeCast, visitUnary, visitVariable

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

getCurrentPath, scan

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

reduce, scan, visitAnnotatedType, visitArrayAccess, visitArrayType, visitAssert, visitBlock, visitBreak, visitCase, visitCatch, visitConditionalExpression, visitContinue, visitDoWhileLoop, visitEmptyStatement, visitErroneous, visitExpressionStatement, visitForLoop, visitIdentifier, visitIf, visitImport, visitLabeledStatement, visitLiteral, visitMemberSelect, visitModifiers, visitOther, visitParenthesized, visitPrimitiveType, visitSwitch, visitSynchronized, visitThrow, visitTry, visitTypeParameter, visitWhileLoop, visitWildcard

Methods inherited from class java.lang.Object

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

Constructor Detail

InterningVisitor

public InterningVisitor(InterningChecker checker,
                        CompilationUnitTree root)

Creates a new visitor for type-checking Interned.

Parameters:

checker - the checker to use

root - the root of the input program's AST to check

Method Detail

visitBinary

public Void visitBinary(BinaryTree node,
                        Void p)

Specified by:

visitBinary in interface TreeVisitor<Void,Void>

Overrides:

visitBinary in class TreeScanner<Void,Void>

visitMethodInvocation

public Void visitMethodInvocation(MethodInvocationTree node,
                                  Void p)

Description copied from class: BaseTypeVisitor

Performs a method invocation check. An invocation of a method, m, on the receiver, r is valid only if:

• passed arguments are subtypes of corresponding m parameters
• r is a subtype of m receiver type
• if m is generic, passed type arguments are subtypes of m type variables

Specified by:

visitMethodInvocation in interface TreeVisitor<Void,Void>

Overrides:

visitMethodInvocation in class BaseTypeVisitor<Void,Void>