Package com.intellij.psi

Class PsiConstantEvaluationHelper

java.lang.Object

com.intellij.psi.PsiConstantEvaluationHelper

Direct Known Subclasses:

PsiConstantEvaluationHelperImpl

public abstract class PsiConstantEvaluationHelper
extends java.lang.Object

Service for evaluating values of constant expressions.

See Also:

JavaPsiFacade.getConstantEvaluationHelper()

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	PsiConstantEvaluationHelper.AuxEvaluator

Constructor Summary

Constructors

Constructor and Description
PsiConstantEvaluationHelper()

Method Summary

Modifier and Type	Method and Description
java.lang.Object	computeConstantExpression(PsiElement expression) Evaluates the value of the specified expression.
abstract java.lang.Object	computeConstantExpression(PsiElement expression, boolean throwExceptionOnOverflow) Evaluates the value of the specified expression and optionally throws ConstantEvaluationOverflowException if an overflow is detected during the evaluation.
abstract java.lang.Object	computeExpression(PsiExpression expression, boolean throwExceptionOnOverflow, PsiConstantEvaluationHelper.AuxEvaluator auxEvaluator)

Methods inherited from class java.lang.Object

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

Constructor Detail

PsiConstantEvaluationHelper

public PsiConstantEvaluationHelper()

Method Detail

computeConstantExpression

public java.lang.Object computeConstantExpression(PsiElement expression)

Evaluates the value of the specified expression.

Parameters:

expression - the expression to evaluate.

Returns:

the result of the evaluation, or null if the expression is not a constant expression.

computeConstantExpression

public abstract java.lang.Object computeConstantExpression(PsiElement expression,
                                                           boolean throwExceptionOnOverflow)

Evaluates the value of the specified expression and optionally throws ConstantEvaluationOverflowException if an overflow is detected during the evaluation.

Parameters:

expression - the expression to evaluate.

throwExceptionOnOverflow - if true, an exception is thrown if an overflow is detected during the evaluation.

Returns:

the result of the evaluation, or null if the expression is not a constant expression.

computeExpression

public abstract java.lang.Object computeExpression(PsiExpression expression,
                                                   boolean throwExceptionOnOverflow,
                                                   PsiConstantEvaluationHelper.AuxEvaluator auxEvaluator)