checkers.lock
Class LockVisitor

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.lock.LockVisitor

All Implemented Interfaces:

TreeVisitor<Void,Void>

public class LockVisitor
extends BaseTypeVisitor<Void,Void>

A type-checking visitor for the Lock type system. This visitor reports errors ("unguarded.access") or warnings for violations for accessing a field or calling a method without holding their locks.

Field Summary

Fields inherited from class checkers.basetype.BaseTypeVisitor

annoFactory, annoTypes, checker, plainFactory, visitorState

Fields inherited from class checkers.source.SourceVisitor

elements, root, trees, types

Constructor Summary

LockVisitor(LockChecker checker, CompilationUnitTree root)

Method Summary

protected boolean	checkMethodInvocability(AnnotatedTypeMirror.AnnotatedExecutableType method, MethodInvocationTree node) Tests whether the method can be invoked using the receiver of the 'node' method invocation, and issues a "method.invocation.invalid" if the invocation is invalid.
protected boolean	checkOverride(MethodTree overriderTree, AnnotatedTypeMirror.AnnotatedDeclaredType enclosingType, AnnotatedTypeMirror.AnnotatedExecutableType overridden, AnnotatedTypeMirror.AnnotatedDeclaredType overriddenType, Void p) Checks that an overriding method's return type, parameter types, and receiver type are correct with respect to the annotations on the overridden method's return type, parameter types, and receiver type.
Void	visitIdentifier(IdentifierTree node, Void p)
Void	visitMemberSelect(MemberSelectTree node, Void p)
Void	visitMethod(MethodTree node, Void p) Performs pseudo-assignment check: checks that the method obeys override and subtype rules to all overridden methods.
Void	visitMethodInvocation(MethodInvocationTree node, Void p) Performs a method invocation check.
Void	visitSynchronized(SynchronizedTree node, Void p)

Methods inherited from class checkers.basetype.BaseTypeVisitor

checkAccess, checkArguments, checkArrayInitialization, checkAssignability, checkConstructorInvocation, checkTypeArguments, checkTypecastSafety, commonAssignmentCheck, commonAssignmentCheck, commonAssignmentCheck, enclosingMemberSelect, isAccessAllowed, scan, shouldSkip, shouldSkip, validateTypeOf, visitAnnotation, visitAssignment, visitClass, visitCompilationUnit, visitCompoundAssignment, visitEnhancedForLoop, visitInstanceOf, 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, visitBinary, visitBlock, visitBreak, visitCase, visitCatch, visitConditionalExpression, visitContinue, visitDoWhileLoop, visitEmptyStatement, visitErroneous, visitExpressionStatement, visitForLoop, visitIf, visitImport, visitLabeledStatement, visitLiteral, visitModifiers, visitOther, visitParenthesized, visitPrimitiveType, visitSwitch, 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

LockVisitor

public LockVisitor(LockChecker checker,
                   CompilationUnitTree root)

Method Detail

visitIdentifier

public Void visitIdentifier(IdentifierTree node,
                            Void p)

Specified by:

visitIdentifier in interface TreeVisitor<Void,Void>

Overrides:

visitIdentifier in class BaseTypeVisitor<Void,Void>

visitMemberSelect

public Void visitMemberSelect(MemberSelectTree node,
                              Void p)

Specified by:

visitMemberSelect in interface TreeVisitor<Void,Void>

Overrides:

visitMemberSelect in class TreeScanner<Void,Void>

visitSynchronized

public Void visitSynchronized(SynchronizedTree node,
                              Void p)

Specified by:

visitSynchronized in interface TreeVisitor<Void,Void>

Overrides:

visitSynchronized in class TreeScanner<Void,Void>

visitMethod

public Void visitMethod(MethodTree node,
                        Void p)

Description copied from class: BaseTypeVisitor

Performs pseudo-assignment check: checks that the method obeys override and subtype rules to all overridden methods. The override rule specifies that a method, m1, may override a method m2 only if:

• m1 return type is a subtype of m2
• m1 receiver type is a supertype of m2
• m1 parameters are supertypes of corresponding m2 parameters

Also, it issues a "missing.this" error for static method annotated receivers.

Specified by:

visitMethod in interface TreeVisitor<Void,Void>

Overrides:

visitMethod in class BaseTypeVisitor<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>

checkOverride

protected boolean checkOverride(MethodTree overriderTree,
                                AnnotatedTypeMirror.AnnotatedDeclaredType enclosingType,
                                AnnotatedTypeMirror.AnnotatedExecutableType overridden,
                                AnnotatedTypeMirror.AnnotatedDeclaredType overriddenType,
                                Void p)

Description copied from class: BaseTypeVisitor

Checks that an overriding method's return type, parameter types, and receiver type are correct with respect to the annotations on the overridden method's return type, parameter types, and receiver type.

This method returns the result of the check, but also emits error messages as a side effect.

Overrides:

checkOverride in class BaseTypeVisitor<Void,Void>

Parameters:

overriderTree - the AST node of the overriding method

enclosingType - the declared type enclosing the overrider method

overridden - the type of the overridden method

overriddenType - the declared type enclosing the overridden method

p - an optional parameter (as supplied to visitor methods)

Returns:

true if the override check passed, false otherwise

checkMethodInvocability

protected boolean checkMethodInvocability(AnnotatedTypeMirror.AnnotatedExecutableType method,
                                          MethodInvocationTree node)

Description copied from class: BaseTypeVisitor

Tests whether the method can be invoked using the receiver of the 'node' method invocation, and issues a "method.invocation.invalid" if the invocation is invalid. This implementation tests whether the receiver in the method invocation is a subtype of the method receiver type.

Overrides:

checkMethodInvocability in class BaseTypeVisitor<Void,Void>

Parameters:

method - the type of the invoked method

node - the method invocation node

Returns:

true iff the call of 'node' is a valid call