org.eclipse.incquery.runtime.emf

Enum EMFQueryMetaContext

java.lang.Object

java.lang.Enum<EMFQueryMetaContext>

org.eclipse.incquery.runtime.emf.EMFQueryMetaContext

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<EMFQueryMetaContext>, IQueryMetaContext

public enum EMFQueryMetaContext
extends java.lang.Enum<EMFQueryMetaContext>
implements IQueryMetaContext

The singleton meta context information for EMF scopes.

TODO generics? TODO TODO no subtyping between EDataTypes? no EDataTypes metainfo at all?

Author:

Bergmann Gabor

Enum Constant Summary

Enum Constants

Enum Constant and Description
INSTANCE

Method Summary

Modifier and Type	Method and Description
void	ensureValidKey(IInputKey key)
org.eclipse.emf.ecore.EReference	featureOpposite(org.eclipse.emf.ecore.EStructuralFeature typeObject)
org.eclipse.emf.ecore.EClass	featureSourceType(org.eclipse.emf.ecore.EStructuralFeature feature)
org.eclipse.emf.ecore.EClassifier	featureTargetType(org.eclipse.emf.ecore.EStructuralFeature typeObject)
java.util.Map<java.util.Set<java.lang.Integer>,java.util.Set<java.lang.Integer>>	getFunctionalDependencies(IInputKey key) Returns functional dependencies of the input key expressed in terms of column indices.
java.util.Collection<InputKeyImplication>	getImplications(IInputKey implyingKey) Returns known implications, e.g.
void	illegalInputKey(IInputKey key)
boolean	isEnumerable(IInputKey key) Returns true iff instance tuples of the given key can be enumerated.
boolean	isFeatureMultiplicityOneTo(org.eclipse.emf.ecore.EStructuralFeature typeObject)
boolean	isFeatureMultiplicityToOne(org.eclipse.emf.ecore.EStructuralFeature feature)
boolean	isStateless(IInputKey key) Returns true iff the set of instance tuples of the given key is immutable.
static EMFQueryMetaContext	valueOf(java.lang.String name) Returns the enum constant of this type with the specified name.
static EMFQueryMetaContext[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

compareTo, equals, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

INSTANCE

public static final EMFQueryMetaContext INSTANCE

Method Detail

values

public static EMFQueryMetaContext[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (EMFQueryMetaContext c : EMFQueryMetaContext.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static EMFQueryMetaContext valueOf(java.lang.String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

java.lang.IllegalArgumentException - if this enum type has no constant with the specified name

java.lang.NullPointerException - if the argument is null

isEnumerable

public boolean isEnumerable(IInputKey key)

Description copied from interface: IQueryMetaContext

Returns true iff instance tuples of the given key can be enumerated.

If false, the runtime can only test tuple membership in the extensional relation identified by the key, but not enumerate member tuples in general.

Equivalent to IInputKey.isEnumerable().

Specified by:

isEnumerable in interface IQueryMetaContext

isStateless

public boolean isStateless(IInputKey key)

Description copied from interface: IQueryMetaContext

Returns true iff the set of instance tuples of the given key is immutable.

If false, the runtime provides notifications upon change.

Specified by:

isStateless in interface IQueryMetaContext

getFunctionalDependencies

public java.util.Map<java.util.Set<java.lang.Integer>,java.util.Set<java.lang.Integer>> getFunctionalDependencies(IInputKey key)

Description copied from interface: IQueryMetaContext

Returns functional dependencies of the input key expressed in terms of column indices.

Each entry of the map is a functional dependency rule, where the entry key specifies source columns and the entry value specifies target columns.

Specified by:

getFunctionalDependencies in interface IQueryMetaContext

getImplications

public java.util.Collection<InputKeyImplication> getImplications(IInputKey implyingKey)

Description copied from interface: IQueryMetaContext

Returns known implications, e.g. edge supertypes, edge opposites, node type constraints, etc.

Note that for the obvious reasons, only enumerable keys can imply enumerable keys.

Specified by:

getImplications in interface IQueryMetaContext

ensureValidKey

public void ensureValidKey(IInputKey key)

illegalInputKey

public void illegalInputKey(IInputKey key)

isFeatureMultiplicityToOne

public boolean isFeatureMultiplicityToOne(org.eclipse.emf.ecore.EStructuralFeature feature)

isFeatureMultiplicityOneTo

public boolean isFeatureMultiplicityOneTo(org.eclipse.emf.ecore.EStructuralFeature typeObject)

featureSourceType

public org.eclipse.emf.ecore.EClass featureSourceType(org.eclipse.emf.ecore.EStructuralFeature feature)

featureTargetType

public org.eclipse.emf.ecore.EClassifier featureTargetType(org.eclipse.emf.ecore.EStructuralFeature typeObject)

featureOpposite

public org.eclipse.emf.ecore.EReference featureOpposite(org.eclipse.emf.ecore.EStructuralFeature typeObject)