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* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
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package org.apache.cayenne.access;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.apache.cayenne.ObjectId;
import org.apache.cayenne.Persistent;
import org.apache.cayenne.map.DbEntity;
import org.apache.cayenne.map.EntitySorter;
import org.apache.cayenne.query.DeleteBatchQuery;
import org.apache.cayenne.query.Query;
/**
* @since 1.2
*/
class DataDomainDeleteBucket extends DataDomainSyncBucket {
DataDomainDeleteBucket(DataDomainFlushAction parent) {
super(parent);
}
@Override
void postprocess() {
if (!objectsByDescriptor.isEmpty()) {
Collection<ObjectId> deletedIds = parent.getResultDeletedIds();
for (List<Persistent> objects : objectsByDescriptor.values()) {
for (Persistent object : objects) {
deletedIds.add(object.getObjectId());
}
}
}
}
@Override
void appendQueriesInternal(Collection<Query> queries) {
DataNodeSyncQualifierDescriptor qualifierBuilder = new DataNodeSyncQualifierDescriptor();
EntitySorter sorter = parent.getDomain().getEntitySorter();
sorter.sortDbEntities(dbEntities, true);
for (DbEntity dbEntity : dbEntities) {
Collection<DbEntityClassDescriptor> descriptors = descriptorsByDbEntity
.get(dbEntity);
Map<Object, Query> batches = new LinkedHashMap<Object, Query>();
for (DbEntityClassDescriptor descriptor : descriptors) {
qualifierBuilder.reset(descriptor);
boolean isRootDbEntity = descriptor.isMaster();
// remove object set for dependent entity, so that it does not show up
// on post processing
List<Persistent> objects = objectsByDescriptor.get(descriptor.getClassDescriptor());
if (objects.isEmpty()) {
continue;
}
checkReadOnly(descriptor.getEntity());
if (isRootDbEntity) {
sorter.sortObjectsForEntity(descriptor.getEntity(), objects, true);
}
for (Persistent o : objects) {
ObjectDiff diff = parent.objectDiff(o.getObjectId());
Map<String, ?> qualifierSnapshot = qualifierBuilder
.createQualifierSnapshot(diff);
// organize batches by the nulls in qualifier
Set<String> nullQualifierNames = new HashSet<String>();
for (Map.Entry<String, ?> entry : qualifierSnapshot.entrySet()) {
if (entry.getValue() == null) {
nullQualifierNames.add(entry.getKey());
}
}
Object batchKey = Arrays.asList(nullQualifierNames);
DeleteBatchQuery batch = (DeleteBatchQuery) batches.get(batchKey);
if (batch == null) {
batch = new DataDomainDeleteQuery(parent.getDomain(),
dbEntity, qualifierBuilder.getAttributes(),
nullQualifierNames, 27);
batch.setUsingOptimisticLocking(qualifierBuilder
.isUsingOptimisticLocking());
batches.put(batchKey, batch);
}
batch.add(qualifierSnapshot);
}
}
queries.addAll(batches.values());
}
}
}