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/*******************************************************************************
* Copyright (c) 2006, 2010 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0, which accompanies this distribution
* and is available at http://www.eclipse.org/legal/epl-v10.html.
*
* Contributors:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.core.internal.context;
import java.util.Iterator;
import org.eclipse.jpt.core.MappingKeys;
import org.eclipse.jpt.core.context.AttributeMapping;
import org.eclipse.jpt.core.context.ReadOnlyTable;
import org.eclipse.jpt.core.context.TypeMapping;
import org.eclipse.jpt.core.jpa2.context.SingleRelationshipMapping2_0;
import org.eclipse.jpt.utility.internal.Transformer;
import org.eclipse.jpt.utility.internal.iterables.CompositeIterable;
import org.eclipse.jpt.utility.internal.iterables.FilteringIterable;
import org.eclipse.jpt.utility.internal.iterables.SubIterableWrapper;
import org.eclipse.jpt.utility.internal.iterables.TransformationIterable;
/**
* Gather some of the behavior common to the Java and XML models. :-(
*/
public class TypeMappingTools
{
// ********** single relationship mappings **********
public static Iterable<String> getMappedByRelationshipAttributeNames(TypeMapping typeMapping) {
return new TransformationIterable<SingleRelationshipMapping2_0, String>(getMapsIdRelationshipMappings(typeMapping)) {
@Override
protected String transform(SingleRelationshipMapping2_0 attributeMapping) {
return attributeMapping.getDerivedIdentity().getMapsIdDerivedIdentityStrategy().getValue();
}
};
}
public static Iterable<SingleRelationshipMapping2_0> getMapsIdRelationshipMappings(TypeMapping typeMapping) {
return new FilteringIterable<SingleRelationshipMapping2_0>(getSingleRelationshipMappings(typeMapping)) {
@Override
protected boolean accept(SingleRelationshipMapping2_0 attributeMapping) {
return attributeMapping.getDerivedIdentity().usesMapsIdDerivedIdentityStrategy();
}
};
}
protected static Iterable<SingleRelationshipMapping2_0> getSingleRelationshipMappings(TypeMapping typeMapping) {
return new SubIterableWrapper<AttributeMapping, SingleRelationshipMapping2_0>(getSingleRelationshipMappings_(typeMapping));
}
@SuppressWarnings("unchecked")
protected static Iterable<AttributeMapping> getSingleRelationshipMappings_(TypeMapping typeMapping) {
return new CompositeIterable<AttributeMapping>(
typeMapping.getAllAttributeMappings(MappingKeys.ONE_TO_ONE_ATTRIBUTE_MAPPING_KEY),
typeMapping.getAllAttributeMappings(MappingKeys.MANY_TO_ONE_ATTRIBUTE_MAPPING_KEY)
);
}
// ********** attribute mappings transformer **********
public static final Transformer<TypeMapping, Iterator<AttributeMapping>> ATTRIBUTE_MAPPINGS_TRANSFORMER = new AttributeMappingsTransformer();
static class AttributeMappingsTransformer
implements Transformer<TypeMapping, Iterator<AttributeMapping>>
{
public Iterator<AttributeMapping> transform(TypeMapping mapping) {
return mapping.attributeMappings();
}
}
// ********** associated tables transformer **********
public static final Transformer<TypeMapping, Iterator<ReadOnlyTable>> ASSOCIATED_TABLES_TRANSFORMER = new AssociatedTablesTransformer();
static class AssociatedTablesTransformer
implements Transformer<TypeMapping, Iterator<ReadOnlyTable>>
{
public Iterator<ReadOnlyTable> transform(TypeMapping mapping) {
return mapping.associatedTables();
}
}
// ********** overridable attribute names transformer **********
public static final Transformer<TypeMapping, Iterator<String>> OVERRIDABLE_ATTRIBUTE_NAMES_TRANSFORMER = new OverridableAttributeNamesTransformer();
static class OverridableAttributeNamesTransformer
implements Transformer<TypeMapping, Iterator<String>>
{
public Iterator<String> transform(TypeMapping mapping) {
return mapping.overridableAttributeNames();
}
}
// ********** overridable association names transformer **********
public static final Transformer<TypeMapping, Iterator<String>> OVERRIDABLE_ASSOCIATION_NAMES_TRANSFORMER = new OverridableAssociationNamesTransformer();
static class OverridableAssociationNamesTransformer
implements Transformer<TypeMapping, Iterator<String>>
{
public Iterator<String> transform(TypeMapping mapping) {
return mapping.overridableAssociationNames();
}
}
// ********** constructor **********
/**
* Suppress default constructor, ensuring non-instantiability.
*/
private TypeMappingTools() {
super();
throw new UnsupportedOperationException();
}
}
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