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/*
* Copyright 2010-2014 the original author or authors.
*
* Licensed 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 under the License.
*/
package lodsve.mongodb.core;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageImpl;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.mongodb.core.MongoOperations;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.data.mongodb.repository.MongoRepository;
import org.springframework.data.mongodb.repository.query.MongoEntityInformation;
import org.springframework.util.Assert;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import static org.springframework.data.mongodb.core.query.Criteria.where;
/**
* Repository base implementation for Mongo.
*
* @author Oliver Gierke
* @author Christoph Strobl
* @author Thomas Darimont
*/
public class GenericMongoRepository implements MongoRepository {
private MongoEntityInformation entityInformation;
private MongoOperations mongoOperations;
public void setEntityInformation(MongoEntityInformation entityInformation) {
this.entityInformation = entityInformation;
}
public GenericMongoRepository(MongoOperations mongoOperations) {
this.mongoOperations = mongoOperations;
}
public S save(S entity) {
Assert.notNull(entity, "Entity must not be null!");
if (entityInformation.isNew(entity)) {
mongoOperations.insert(entity, entityInformation.getCollectionName());
} else {
mongoOperations.save(entity, entityInformation.getCollectionName());
}
return entity;
}
public List save(Iterable entities) {
Assert.notNull(entities, "The given Iterable of entities not be null!");
List result = convertIterableToList(entities);
boolean allNew = true;
for (S entity : entities) {
if (allNew && !entityInformation.isNew(entity)) {
allNew = false;
}
}
if (allNew) {
mongoOperations.insertAll(result);
} else {
for (S entity : result) {
save(entity);
}
}
return result;
}
public T findOne(ID id) {
Assert.notNull(id, "The given id must not be null!");
return mongoOperations.findById(id, entityInformation.getJavaType(), entityInformation.getCollectionName());
}
private Query getIdQuery(Object id) {
return new Query(getIdCriteria(id));
}
private Criteria getIdCriteria(Object id) {
return where(entityInformation.getIdAttribute()).is(id);
}
public boolean exists(ID id) {
Assert.notNull(id, "The given id must not be null!");
return mongoOperations.exists(getIdQuery(id), entityInformation.getJavaType(),
entityInformation.getCollectionName());
}
public long count() {
return mongoOperations.getCollection(entityInformation.getCollectionName()).count();
}
public void delete(ID id) {
Assert.notNull(id, "The given id must not be null!");
mongoOperations.remove(getIdQuery(id), entityInformation.getJavaType(), entityInformation.getCollectionName());
}
public void delete(T entity) {
Assert.notNull(entity, "The given entity must not be null!");
delete(entityInformation.getId(entity));
}
public void delete(Iterable entities) {
Assert.notNull(entities, "The given Iterable of entities not be null!");
for (T entity : entities) {
delete(entity);
}
}
public void deleteAll() {
mongoOperations.remove(new Query(), entityInformation.getCollectionName());
}
public List findAll() {
return findAll(new Query());
}
public Iterable findAll(Iterable ids) {
Set parameters = new HashSet<>(tryDetermineRealSizeOrReturn(ids, 10));
for (ID id : ids) {
parameters.add(id);
}
return findAll(new Query(new Criteria(entityInformation.getIdAttribute()).in(parameters)));
}
public Page findAll(final Pageable pageable) {
Long count = count();
List list = findAll(new Query().with(pageable));
return new PageImpl<>(list, pageable, count);
}
public List findAll(Sort sort) {
return findAll(new Query().with(sort));
}
@Override
public S insert(S entity) {
Assert.notNull(entity, "Entity must not be null!");
mongoOperations.insert(entity, entityInformation.getCollectionName());
return entity;
}
@Override
public List insert(Iterable entities) {
Assert.notNull(entities, "The given Iterable of entities not be null!");
List list = convertIterableToList(entities);
if (list.isEmpty()) {
return list;
}
mongoOperations.insertAll(list);
return list;
}
private List findAll(Query query) {
if (query == null) {
return Collections.emptyList();
}
return mongoOperations.find(query, entityInformation.getJavaType(), entityInformation.getCollectionName());
}
private static List convertIterableToList(Iterable entities) {
if (entities instanceof List) {
return (List) entities;
}
int capacity = tryDetermineRealSizeOrReturn(entities, 10);
if (capacity == 0 || entities == null) {
return Collections.emptyList();
}
List list = new ArrayList<>(capacity);
for (T entity : entities) {
list.add(entity);
}
return list;
}
private static int tryDetermineRealSizeOrReturn(Iterable iterable, int defaultSize) {
return iterable == null ? 0 : (iterable instanceof Collection) ? ((Collection) iterable).size() : defaultSize;
}
}
