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/*******************************************************************************
* Copyright (c) 2006, 2013 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.jpa.core.internal.context;
import org.eclipse.jpt.common.utility.internal.iterable.IterableTools;
import org.eclipse.jpt.common.utility.internal.iterable.SubIterableWrapper;
import org.eclipse.jpt.common.utility.internal.transformer.TransformerAdapter;
import org.eclipse.jpt.common.utility.transformer.Transformer;
import org.eclipse.jpt.jpa.core.MappingKeys;
import org.eclipse.jpt.jpa.core.context.AttributeMapping;
import org.eclipse.jpt.jpa.core.context.Table;
import org.eclipse.jpt.jpa.core.context.TypeMapping;
import org.eclipse.jpt.jpa.core.jpa2.context.DerivedIdentity2_0;
import org.eclipse.jpt.jpa.core.jpa2.context.MapsIdDerivedIdentityStrategy2_0;
import org.eclipse.jpt.jpa.core.jpa2.context.SingleRelationshipMapping2_0;
/**
* Gather some of the behavior common to the Java and XML models. :-(
*/
public class TypeMappingTools {
// ********** single relationship mappings **********
/**
* Return whether the specified attribute is a derived ID for the specified
* type mapping.
*/
public static boolean attributeIsDerivedId(TypeMapping typeMapping, String attributeName) {
if (attributeName == null) {
return false;
}
// the attribute name may be qualified - we test only the first attribute name
int dotIndex = attributeName.indexOf('.');
attributeName = (dotIndex == -1) ? attributeName : attributeName.substring(0, dotIndex);
return IterableTools.contains(getMapsIdDerivedIdAttributeNames(typeMapping), attributeName);
}
/**
* Return the names of all the ID attributes derived from
* single-relationship mappings for the specified type mapping
* (i.e. the names of the ID attributes that are specified by a single-
* relationship mapping's "maps ID" setting).
*/
protected static Iterable<String> getMapsIdDerivedIdAttributeNames(TypeMapping typeMapping) {
return IterableTools.transform(getMapsIdDerivedIdentityStrategies(typeMapping), MapsIdDerivedIdentityStrategy2_0.ID_ATTRIBUTE_NAME_TRANSFORMER);
}
/**
* Return all the single-relationship "maps ID" derived identity strategies
* for the specified type mapping.
*/
protected static Iterable<MapsIdDerivedIdentityStrategy2_0> getMapsIdDerivedIdentityStrategies(TypeMapping typeMapping) {
return IterableTools.transform(getMapsIdDerivedIdentities(typeMapping), DerivedIdentity2_0.MAPS_ID_DERIVED_IDENTITY_STRATEGY_TRANSFORMER);
}
/**
* Return all the single-relationship "maps ID" derived identities for the
* specified type mapping.
*/
protected static Iterable<DerivedIdentity2_0> getMapsIdDerivedIdentities(TypeMapping typeMapping) {
return IterableTools.filter(getDerivedIdentities(typeMapping), DerivedIdentity2_0.USES_MAPS_ID_DERIVED_IDENTITY_STRATEGY);
}
/**
* Return all the single-relationship derived identities for the specified
* type mapping.
*/
protected static Iterable<DerivedIdentity2_0> getDerivedIdentities(TypeMapping typeMapping) {
return IterableTools.transform(getSingleRelationshipMappings(typeMapping), SingleRelationshipMapping2_0.DERIVED_IDENTITY_TRANSFORMER);
}
/**
* Return all the single-relationship attribute mappings for the specified
* type mapping.
*/
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 IterableTools.concatenate(
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, Iterable<AttributeMapping>> ATTRIBUTE_MAPPINGS_TRANSFORMER = new AttributeMappingsTransformer();
static class AttributeMappingsTransformer
extends TransformerAdapter<TypeMapping, Iterable<AttributeMapping>>
{
@Override
public Iterable<AttributeMapping> transform(TypeMapping mapping) {
return mapping.getAttributeMappings();
}
}
// ********** associated tables transformer **********
public static final Transformer<TypeMapping, Iterable<Table>> ASSOCIATED_TABLES_TRANSFORMER = new AssociatedTablesTransformer();
static class AssociatedTablesTransformer
extends TransformerAdapter<TypeMapping, Iterable<Table>>
{
@Override
public Iterable<Table> transform(TypeMapping mapping) {
return mapping.getAssociatedTables();
}
}
// ********** overridable attribute names transformer **********
public static final Transformer<TypeMapping, Iterable<String>> OVERRIDABLE_ATTRIBUTE_NAMES_TRANSFORMER = new OverridableAttributeNamesTransformer();
static class OverridableAttributeNamesTransformer
extends TransformerAdapter<TypeMapping, Iterable<String>>
{
@Override
public Iterable<String> transform(TypeMapping mapping) {
return mapping.getOverridableAttributeNames();
}
}
// ********** overridable association names transformer **********
public static final Transformer<TypeMapping, Iterable<String>> OVERRIDABLE_ASSOCIATION_NAMES_TRANSFORMER = new OverridableAssociationNamesTransformer();
static class OverridableAssociationNamesTransformer
extends TransformerAdapter<TypeMapping, Iterable<String>>
{
@Override
public Iterable<String> transform(TypeMapping mapping) {
return mapping.getOverridableAssociationNames();
}
}
// ********** constructor **********
/**
* Suppress default constructor, ensuring non-instantiability.
*/
private TypeMappingTools() {
super();
throw new UnsupportedOperationException();
}
}
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