Package org.checkerframework.dataflow.expression

Class BinaryOperation

java.lang.Object

org.checkerframework.dataflow.expression.JavaExpression

org.checkerframework.dataflow.expression.BinaryOperation

public class BinaryOperation
extends JavaExpression

JavaExpression for binary operations.

Field Summary

Fields

Modifier and Type	Field	Description
protected final JavaExpression	left	The left operand.
protected final Tree.Kind	operationKind	The binary operation kind.
protected final JavaExpression	right	The right operand.

Fields inherited from class org.checkerframework.dataflow.expression.JavaExpression

type

Constructor Summary

Constructors

Constructor	Description
BinaryOperation(TypeMirror type, Tree.Kind operationKind, JavaExpression left, JavaExpression right)	Create a binary operation.
BinaryOperation(BinaryOperationNode node, JavaExpression left, JavaExpression right)	Create a binary operation.

Method Summary

Modifier and Type	Method	Description
<R, P> R	accept(JavaExpressionVisitor<R,P> visitor, P p)	Accept method of the visitor pattern.
<T extends JavaExpression> @Nullable T	containedOfClass(Class<T> clazz)	Returns the first subexpression whose class is the given class, or null.
boolean	containsModifiableAliasOf(Store<?> store, JavaExpression other)	Returns true if and only if other appears anywhere in this or an expression appears in this such that other might alias this expression, and that expression is modifiable.
boolean	containsSyntacticEqualJavaExpression(JavaExpression other)	Returns true if and only if this contains a JavaExpression that is syntactically equal to other.
boolean	equals(@Nullable Object other)
JavaExpression	getLeft()	Returns the left operand of this binary operation.
Tree.Kind	getOperationKind()	Returns the operator of this binary operation.
JavaExpression	getRight()	Returns the right operand of this binary operation.
int	hashCode()
boolean	isAssignableByOtherCode()	Returns true if some subexpression of this can be assigned to from outside the current method body.
boolean	isDeterministic(AnnotationProvider provider)	Returns true if the expression is deterministic.
boolean	isModifiableByOtherCode()	Returns true if the value this expression stands for can be changed by a method call; equivalently, if the value this expression evaluates to can be changed by a side effect from outside the containing method.
boolean	syntacticEquals(JavaExpression je)	Returns true if and only if the two Java expressions are syntactically identical.
String	toString()

Methods inherited from class org.checkerframework.dataflow.expression.JavaExpression

atConstructorInvocation, atFieldAccess, atMethodBody, atMethodInvocation, atMethodInvocation, containedUnknown, containsOfClass, containsUnknown, fromArrayAccess, fromNode, fromNodeFieldAccess, fromTree, fromVariableTree, getFormalParameters, getImplicitReceiver, getParametersAsLocalVariables, getPseudoReceiver, getReceiver, getType, isUnassignableByOtherCode, isUnmodifiableByOtherCode, listContainsSyntacticEqualJavaExpression, listIsDeterministic, syntacticEqualsList, toStringDebug

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

operationKind

protected final Tree.Kind operationKind

The binary operation kind.

left

protected final JavaExpression left

The left operand.

right

protected final JavaExpression right

The right operand.

Constructor Details

BinaryOperation

public BinaryOperation(TypeMirror type,
 Tree.Kind operationKind,
 JavaExpression left,
 JavaExpression right)

Create a binary operation.

Parameters:

type - the result type

operationKind - the operator

left - the left operand

right - the right operand

BinaryOperation

public BinaryOperation(BinaryOperationNode node,
 JavaExpression left,
 JavaExpression right)

Create a binary operation.

Parameters:

node - the binary operation node

left - the left operand

right - the right operand

Method Details

getOperationKind

public Tree.Kind getOperationKind()

Returns the operator of this binary operation.

Returns:

the binary operation kind

getLeft

public JavaExpression getLeft()

Returns the left operand of this binary operation.

Returns:

the left operand

getRight

public JavaExpression getRight()

Returns the right operand of this binary operation.

Returns:

the right operand

containedOfClass

public <T extends JavaExpression> @Nullable T containedOfClass(Class<T> clazz)

Description copied from class: JavaExpression

Returns the first subexpression whose class is the given class, or null.

This is intended as a diagnostic aid; most clients will use JavaExpression.containsOfClass(java.lang.Class<? extends org.checkerframework.dataflow.expression.JavaExpression>).

Specified by:

containedOfClass in class JavaExpression

Type Parameters:

T - the type corresponding to clazz

Parameters:

clazz - the JavaExpression subclass to search for

Returns:

true if some subexpression whose class is the given class

isDeterministic

public boolean isDeterministic(AnnotationProvider provider)

Description copied from class: JavaExpression

Returns true if the expression is deterministic.

Specified by:

isDeterministic in class JavaExpression

Parameters:

provider - an annotation provider (a type factory)

Returns:

true if this expression is deterministic

isAssignableByOtherCode

public boolean isAssignableByOtherCode()

Description copied from class: JavaExpression

Returns true if some subexpression of this can be assigned to from outside the current method body.

This is false for local variables, the self reference, final field accesses whose receiver is JavaExpression.isUnassignableByOtherCode(), and operations whose operands are all not JavaExpression.isModifiableByOtherCode().

Overrides:

isAssignableByOtherCode in class JavaExpression

Returns:

true if some subexpression of this can be assigned to from outside the current method body

See Also:

• JavaExpression.isModifiableByOtherCode()

isModifiableByOtherCode

public boolean isModifiableByOtherCode()

Description copied from class: JavaExpression

Returns true if the value this expression stands for can be changed by a method call; equivalently, if the value this expression evaluates to can be changed by a side effect from outside the containing method.

Approximately, this returns true if the expression is JavaExpression.isAssignableByOtherCode() or its type is mutable. (String is an immutable type.)

Overrides:

isModifiableByOtherCode in class JavaExpression

Returns:

true if the value of this expression can be changed from outside the current method body

See Also:

• JavaExpression.isUnassignableByOtherCode()

syntacticEquals

public boolean syntacticEquals(JavaExpression je)

Description copied from class: JavaExpression

Returns true if and only if the two Java expressions are syntactically identical.

This exists for use by JavaExpression.containsSyntacticEqualJavaExpression(org.checkerframework.dataflow.expression.JavaExpression).

Specified by:

syntacticEquals in class JavaExpression

Parameters:

je - the other Java expression to compare to this one

Returns:

true if and only if the two Java expressions are syntactically identical

containsSyntacticEqualJavaExpression

public boolean containsSyntacticEqualJavaExpression(JavaExpression other)

Description copied from class: JavaExpression

Returns true if and only if this contains a JavaExpression that is syntactically equal to other.

Specified by:

containsSyntacticEqualJavaExpression in class JavaExpression

Parameters:

other - the JavaExpression to search for

Returns:

true if and only if this contains a JavaExpression that is syntactically equal to other

containsModifiableAliasOf

public boolean containsModifiableAliasOf(Store<?> store,
 JavaExpression other)

Description copied from class: JavaExpression

Returns true if and only if other appears anywhere in this or an expression appears in this such that other might alias this expression, and that expression is modifiable.

This is always true, except for cases where the Java type information prevents aliasing and none of the subexpressions can alias 'other'.

Overrides:

containsModifiableAliasOf in class JavaExpression

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(@Nullable Object other)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object

accept

public <R,
P> R accept(JavaExpressionVisitor<R,P> visitor,
 P p)

Description copied from class: JavaExpression

Accept method of the visitor pattern.

Specified by:

accept in class JavaExpression

Type Parameters:

R - result type of the operation

P - parameter type

Parameters:

visitor - the visitor to be applied to this JavaExpression

p - the parameter for this operation

Returns:

the result of visiting this