Package org.eclipse.core.expressions
Class ReferenceExpression
java.lang.Object
org.eclipse.core.expressions.Expression
org.eclipse.core.expressions.ReferenceExpression
This class makes use of the org.eclipse.core.expressions.definitions
extension point to evaluate the current context against pre-defined
expressions. It provides core expression re-use.
- Since:
- 3.7
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Field Summary
Fields inherited from class org.eclipse.core.expressions.Expression
ATT_VALUE, FALSE, HASH_CODE_NOT_COMPUTED, HASH_FACTOR, TRUE -
Constructor Summary
ConstructorsConstructorDescriptionReferenceExpression(String definitionId) ReferenceExpression(IConfigurationElement element) ReferenceExpression(Element element) -
Method Summary
Modifier and TypeMethodDescriptionvoidCollects information about this expression tree.protected intMethod to compute the hash code for this object.booleanevaluate(IEvaluationContext context) Evaluates this expression.toString()Methods inherited from class org.eclipse.core.expressions.Expression
computeExpressionInfo, equals, equals, hashCode, hashCode, hashCode
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Constructor Details
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ReferenceExpression
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ReferenceExpression
- Throws:
CoreException
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ReferenceExpression
- Throws:
CoreException
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Method Details
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evaluate
Description copied from class:ExpressionEvaluates this expression.- Specified by:
evaluatein classExpression- Parameters:
context- an evaluation context providing information like variable, name spaces, etc. necessary to evaluate this expression- Returns:
- the result of the expression evaluation
- Throws:
CoreException- if the evaluation failed. The concrete reason is defined by the subclass implementing this method
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collectExpressionInfo
Description copied from class:ExpressionCollects information about this expression tree. This default implementation add the expression's type to the set of misbehaving expression types.- Overrides:
collectExpressionInfoin classExpression- Parameters:
info- the expression information object used to collect the information
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equals
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computeHashCode
protected int computeHashCode()Description copied from class:ExpressionMethod to compute the hash code for this object. The result returned from this method in cached in thefHashCodefield. If the value returned from the method equalsExpression.HASH_CODE_NOT_COMPUTED(e.g.-1) then the value is incremented by one.This default implementation calls
super.hashCode()- Overrides:
computeHashCodein classExpression- Returns:
- a hash code for this object.
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toString
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