org.eclipse.emf.query.conditions.eobjects.structuralfeatures
Interface IEStructuralFeatureValueGetter
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All Known Implementing Classes:
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EStructuralFeatureValueGetter
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public interface IEStructuralFeatureValueGetter
An interface used to allow clients more control over the process of
iteracting with EObject being evaluated by some
EObjectConditions. It acts as a layer of indirection and EObjectConditions
that make use of it will always be calling this interfaces methods instead of
invoking them directly on the EObject they are testing.
Clients may provide their own implementation.
eContents
List<
EObject> eContents(
EObject eObject,
EObjectCondition filterCondition)
- Extract the contained EObjects of the argument eObject. and return them
as a list. It uses an -optional-
EObjectCondition as a
filtering condition of the content list where only those children
EObjects that satisfy the filterCondition will be returned to the caller
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Parameters:
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eObject - The EObject to extract children from -
filterCondition - The EObjectCondition to apply on the children
in order to remove out those that don't satisfy it. It could
be null.
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Returns:
- List The list of children of the argument eObject.
eGet
Object eGet(
EObject eObject,
EStructuralFeature eFeature,
boolean resolve)
- An
EStructuralFeature's value getter.
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Parameters:
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eObject - The context eObject whose EStructuralFeature's
value is to be returned -
eFeature - The EStructuralFeature whose value is to be
returned -
resolve - A boolean flag indicating whether to resolve or not when
extracting the value.
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Returns:
- Object the value held by the eFeature argument
resolve
EObject resolve(
EObject eObject)
- Prepares the argument eObject for being tested by a given
EObjectCondition so that it won't be necessary to use this
getter to call eContents or eGet on it. This function is used whenever
the eObject is being passed by some EObjectCondition to
some other evaluator that does not know about this interface, and thus,
we must prepare the eObject to have its methods invoked directly. The
prepared EObject that is returned by this function will be
used for evaluation.
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Parameters:
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eObject - The EObject to be prepared
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Returns:
- EObject the prepared
EObject
