/*******************************************************************************
* Copyright (c) 1998, 2011 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* 01/28/2009-2.0 Guy Pelletier
* - 248293: JPA 2.0 Element Collections (part 1)
* 02/06/2009-2.0 Guy Pelletier
* - 248293: JPA 2.0 Element Collections (part 2)
* 02/25/2009-2.0 Guy Pelletier
* - 265359: JPA 2.0 Element Collections - Metadata processing portions
* 03/27/2009-2.0 Guy Pelletier
* - 241413: JPA 2.0 Add EclipseLink support for Map type attributes
* 06/02/2009-2.0 Guy Pelletier
* - 278768: JPA 2.0 Association Override Join Table
* 11/06/2009-2.0 Guy Pelletier
* - 286317: UniqueConstraint xml element is changing (plus couple other fixes, see bug)
* 03/08/2010-2.1 Guy Pelletier
* - 303632: Add attribute-type for mapping attributes to EclipseLink-ORM
* 03/29/2010-2.1 Guy Pelletier
* - 267217: Add Named Access Type to EclipseLink-ORM
* 04/27/2010-2.1 Guy Pelletier
* - 309856: MappedSuperclasses from XML are not being initialized properly
* 12/30/2010-2.3 Guy Pelletier
* - 312253: Descriptor exception with Embeddable on DDL gen
* 03/24/2011-2.3 Guy Pelletier
* - 337323: Multi-tenant with shared schema support (part 1)
* 07/03/2011-2.3.1 Guy Pelletier
* - 348756: m_cascadeOnDelete boolean should be changed to Boolean
******************************************************************************/
package org.eclipse.persistence.internal.jpa.metadata.accessors.mappings;
import javax.persistence.FetchType;
import org.eclipse.persistence.annotations.BatchFetch;
import org.eclipse.persistence.annotations.CascadeOnDelete;
import org.eclipse.persistence.annotations.JoinFetch;
import org.eclipse.persistence.annotations.Noncacheable;
import org.eclipse.persistence.internal.helper.DatabaseTable;
import org.eclipse.persistence.internal.jpa.metadata.MetadataDescriptor;
import org.eclipse.persistence.internal.jpa.metadata.MetadataLogger;
import org.eclipse.persistence.internal.jpa.metadata.accessors.classes.ClassAccessor;
import org.eclipse.persistence.internal.jpa.metadata.accessors.objects.MetadataAccessibleObject;
import org.eclipse.persistence.internal.jpa.metadata.accessors.objects.MetadataAnnotation;
import org.eclipse.persistence.internal.jpa.metadata.tables.CollectionTableMetadata;
import org.eclipse.persistence.internal.jpa.metadata.xml.XMLEntityMappings;
import org.eclipse.persistence.mappings.AggregateCollectionMapping;
import org.eclipse.persistence.mappings.CollectionMapping;
import org.eclipse.persistence.mappings.DirectCollectionMapping;
import org.eclipse.persistence.mappings.DirectMapMapping;
/**
* An abstract direct collection accessor.
*
* Used to support DirectCollection, DirectMap, AggregateCollection through
* the ElementCollection, BasicCollection and BasicMap metadata.
*
* Key notes:
* - any metadata mapped from XML to this class must be compared in the
* equals method.
* - any metadata mapped from XML to this class must be handled in the merge
* method. (merging is done at the accessor/mapping level)
* - any metadata mapped from XML to this class must be initialized in the
* initXMLObject method.
* - methods should be preserved in alphabetical order.
*
* @author Guy Pelletier
* @since EclipseLink 1.2
*/
public abstract class DirectCollectionAccessor extends DirectAccessor {
private Boolean m_cascadeOnDelete;
private Boolean m_nonCacheable;
private String m_joinFetch;
private String m_batchFetch;
private Integer m_batchFetchSize;
private CollectionTableMetadata m_collectionTable;
/**
* INTERNAL:
*/
protected DirectCollectionAccessor(String xmlElement) {
super(xmlElement);
}
/**
* INTERNAL:
*/
protected DirectCollectionAccessor(MetadataAnnotation annotation, MetadataAccessibleObject accessibleObject, ClassAccessor classAccessor) {
super(annotation, accessibleObject, classAccessor);
// Set the fetch type. A basic map may have no annotation (will default).
if (annotation != null) {
// Set the fetch type.
setFetch((String) annotation.getAttribute("fetch"));
}
// Set the join fetch if one is present.
MetadataAnnotation joinFetch = getAnnotation(JoinFetch.class);
if (joinFetch != null) {
m_joinFetch = (String) joinFetch.getAttribute("value");
}
// Set the batch fetch if one is present.
MetadataAnnotation batchFetch = getAnnotation(BatchFetch.class);
if (batchFetch != null) {
// Get attribute string will return the default ""
m_batchFetch = (String) batchFetch.getAttributeString("value");
m_batchFetchSize = (Integer) batchFetch.getAttribute("size");
}
// Set the cascade on delete if specified.
m_cascadeOnDelete = isAnnotationPresent(CascadeOnDelete.class);
// Set the non cacheable if specified.
m_nonCacheable = isAnnotationPresent(Noncacheable.class);
// Since BasicCollection and ElementCollection look for different
// collection tables, we will not initialize/look for one here. Those
// accessors will be responsible for loading their collection table.
}
/**
* INTERNAL:
*/
@Override
public boolean equals(Object objectToCompare) {
if (super.equals(objectToCompare) && objectToCompare instanceof DirectCollectionAccessor) {
DirectCollectionAccessor directCollectionAccessor = (DirectCollectionAccessor) objectToCompare;
if (! valuesMatch(m_joinFetch, directCollectionAccessor.getJoinFetch())) {
return false;
}
if (! valuesMatch(m_batchFetch, directCollectionAccessor.getBatchFetch())) {
return false;
}
if (! valuesMatch(m_batchFetchSize, directCollectionAccessor.getBatchFetchSize())) {
return false;
}
if (! valuesMatch(m_cascadeOnDelete, directCollectionAccessor.getCascadeOnDelete())) {
return false;
}
if (! valuesMatch(m_nonCacheable, directCollectionAccessor.getNonCacheable())) {
return false;
}
return valuesMatch(m_collectionTable, directCollectionAccessor.getCollectionTable());
}
return false;
}
/**
* INTERNAL:
* Used for OX mapping.
*/
public String getBatchFetch() {
return m_batchFetch;
}
/**
* INTERNAL:
* Used for OX mapping.
*/
public Boolean getCascadeOnDelete() {
return m_cascadeOnDelete;
}
/**
* INTERNAL:
* Used for OX mapping.
*/
public Integer getBatchFetchSize() {
return m_batchFetchSize;
}
/**
* INTERNAL:
* Used for OX mapping.
*/
public void setBatchFetchSize(Integer batchFetchSize) {
m_batchFetchSize = batchFetchSize;
}
/**
* INTERNAL:
* Used for OX mapping.
*/
public CollectionTableMetadata getCollectionTable() {
return m_collectionTable;
}
/**
* INTERNAL:
*/
protected String getDefaultCollectionTableName() {
return getOwningDescriptor().getAlias() + "_" + getDefaultAttributeName();
}
/**
* INTERNAL:
*/
@Override
public String getDefaultFetchType() {
return FetchType.LAZY.name();
}
/**
* INTERNAL:
* Used for OX mapping.
*/
public String getJoinFetch() {
return m_joinFetch;
}
/**
* INTERNAL:
* Used for OX mapping.
*/
public String getPrivateOwned() {
return null;
}
/**
* INTERNAL:
* The reference table in a direct collection case is the collection table.
*/
@Override
protected DatabaseTable getReferenceDatabaseTable() {
return m_collectionTable.getDatabaseTable();
}
/**
* INTERNAL:
* In a direct collection case, there is no notion of a reference
* descriptor, therefore we return this accessors descriptor.
*/
@Override
public MetadataDescriptor getReferenceDescriptor() {
return getDescriptor();
}
/**
* INTERNAL:
* Return the converter name for a map key.
*/
protected abstract String getKeyConverter();
/**
* INTERNAL:
* Used for OX mapping.
*/
public Boolean getNonCacheable(){
return m_nonCacheable;
}
/**
* INTERNAL:
* Return the converter name for a collection value.
* @see BasicMapAccessor for override details. An EclipseLink
* BasicMapAccessor can specify a value converter within the BasicMap
* metadata. Otherwise for all other cases, BasicCollectionAccessor and
* ElementCollectionAccessor, the value converter is returned from a Convert
* metadata specification.
*/
protected String getValueConverter() {
return getConvert();
}
/**
* INTERNAL:
* Return true if this accessor has a map key class specified.
* @see ElementCollectionAccessor
*/
protected boolean hasMapKeyClass() {
return false;
}
/**
* INTERNAL:
*/
@Override
public void initXMLObject(MetadataAccessibleObject accessibleObject, XMLEntityMappings entityMappings) {
super.initXMLObject(accessibleObject, entityMappings);
// Initialize single objects.
initXMLObject(m_collectionTable, accessibleObject);
}
/**
* INTERNAL:
*/
public Boolean isCascadeOnDelete() {
return m_cascadeOnDelete != null && m_cascadeOnDelete.booleanValue();
}
/**
* INTERNAL:
* Return true if this accessor represents a direct collection mapping,
* which include basic collection, basic map and element collection
* accessors.
*/
@Override
public boolean isDirectCollection() {
return true;
}
/**
* INTERNAL:
* Used for OX mapping.
*/
public boolean isNonCacheable() {
return m_nonCacheable != null && m_nonCacheable.booleanValue();
}
/**
* INTERNAL:
* Returns true if the given class is a valid basic collection type.
*/
protected boolean isValidDirectCollectionType() {
return getAccessibleObject().isSupportedCollectionClass(getRawClass());
}
/**
* INTERNAL:
* Returns true if the given class is a valid basic map type.
*/
protected boolean isValidDirectMapType() {
return getAccessibleObject().isSupportedMapClass(getRawClass());
}
/**
* INTERNAL:
*/
protected void process(CollectionMapping mapping) {
// Add the mapping to the descriptor.
setMapping(mapping);
// Set the reference class name.
mapping.setReferenceClassName(getReferenceClassName());
// Set the attribute name.
mapping.setAttributeName(getAttributeName());
// Will check for PROPERTY access
setAccessorMethods(mapping);
// Process join fetch type.
processJoinFetch(getJoinFetch(), mapping);
// Process the batch fetch if specified.
processBatchFetch(getBatchFetch(), mapping);
// Process the collection table.
processCollectionTable(mapping);
// Process a @ReturnInsert and @ReturnUpdate (to log a warning message)
processReturnInsertAndUpdate();
// The spec. requires pessimistic lock to be extend-able to CollectionTable
mapping.setShouldExtendPessimisticLockScope(true);
// Set the cascade on delete if specified.
mapping.setIsCascadeOnDeleteSetOnDatabase(isCascadeOnDelete());
// Set the non cacheable if specified.
mapping.setIsCacheable(!isNonCacheable());
// Process any partitioning policies.
processPartitioning();
}
/**
* INTERNAL:
* Process a MetadataCollectionTable. Sub classes should call this to
* ensure a table is defaulted.
*/
protected void processCollectionTable(CollectionMapping mapping) {
// Check that we loaded a collection table otherwise default one.
if (m_collectionTable == null) {
m_collectionTable = new CollectionTableMetadata(this);
}
// Process any table defaults and log warning messages.
processTable(m_collectionTable, getDefaultCollectionTableName());
// Set the reference table on the mapping.
if (isDirectEmbeddableCollection()) {
((AggregateCollectionMapping) mapping).setDefaultSourceTable(m_collectionTable.getDatabaseTable());
} else {
((DirectCollectionMapping) mapping).setReferenceTable(m_collectionTable.getDatabaseTable());
}
}
/**
* INTERNAL:
*/
protected void processDirectCollectionMapping() {
// Initialize our mapping.
DirectCollectionMapping mapping = new DirectCollectionMapping();
// Process common direct collection metadata. This must be done
// before any field processing since field processing requires that
// the collection table be processed before hand.
process(mapping);
// Process the container and indirection policies.
processContainerPolicyAndIndirection(mapping);
// Process the value column (we must process this field before the
// call to processConverter, since it may set a field classification)
mapping.setDirectField(getDatabaseField(getReferenceDatabaseTable(), MetadataLogger.VALUE_COLUMN));
// To resolve any generic types (or respect an attribute type
// specification) we need to set the attribute classification on the
// mapping to ensure we do the right conversions.
if (hasAttributeType() || getAccessibleObject().isGenericCollectionType()) {
mapping.setDirectFieldClassificationName(getReferenceClassName());
}
// Process a converter for this mapping. We will look for a convert
// value. If none is found then we'll look for a JPA converter, that
// is, Enumerated, Lob and Temporal. With everything falling into
// a serialized mapping if no converter whatsoever is found.
processMappingValueConverter(mapping, getValueConverter(), getReferenceClass());
}
/**
* INTERNAL:
*/
protected void processDirectMapMapping() {
// Initialize and process common direct collection metadata. This must
// be done before any field processing since field processing requires
// that the collection table be processed before hand.
DirectMapMapping mapping = new DirectMapMapping();
process(mapping);
// Process the container and indirection policies.
processContainerPolicyAndIndirection(mapping);
// Process the key column (we must process this field before the
// call to processConverter, since it may set a field classification)
mapping.setDirectKeyField(getDatabaseField(getReferenceDatabaseTable(), MetadataLogger.MAP_KEY_COLUMN));
// Only process the key converter if this is a basic map accessor. The
// key converter for an element collection case will be taken care of
// in the processContainerPolicyAndIndirection call above.
if (isBasicMap()) {
// To resolve any generic types (or respect an attribute type
// specification) we need to set the attribute classification on the
// mapping to ensure we do the right conversions.
if (hasAttributeType() || getAccessibleObject().isGenericCollectionType()) {
mapping.setDirectKeyFieldClassification(getJavaClass(getMapKeyReferenceClass()));
}
// Process a converter for the key column of this mapping.
processMappingKeyConverter(mapping, getKeyConverter(), getMapKeyReferenceClass());
}
// Process the value column (we must process this field before the call
// to processConverter, since it may set a field classification)
mapping.setDirectField(getDatabaseField(getReferenceDatabaseTable(), MetadataLogger.VALUE_COLUMN));
// To resolve any generic types (or respect an attribute type
// specification) we need to set the attribute classification on the
// mapping to ensure we do the right conversions.
if (hasAttributeType() || getAccessibleObject().isGenericCollectionType()) {
mapping.setDirectFieldClassification(getJavaClass(getReferenceClass()));
}
// Process a converter for value column of this mapping.
processMappingValueConverter(mapping, getValueConverter(), getReferenceClass());
}
/**
* INTERNAL:
* Used for OX mapping.
*/
public void setBatchFetch(String batchFetch) {
m_batchFetch = batchFetch;
}
/**
* INTERNAL:
* Used for OX mapping.
*/
public void setCascadeOnDelete(Boolean cascadeOnDelete) {
m_cascadeOnDelete = cascadeOnDelete;
}
/**
* INTERNAL:
* Used for OX mapping.
*/
public void setCollectionTable(CollectionTableMetadata collectionTable) {
m_collectionTable = collectionTable;
}
/**
* INTERNAL:
* Used for OX mapping.
*/
public void setNonCacheable(Boolean nonCacheable){
m_nonCacheable = nonCacheable;
}
/**
* INTERNAL:
* Used for OX mapping.
*/
public void setJoinFetch(String joinFetch) {
m_joinFetch = joinFetch;
}
}