com.sinosoft.one.data.jpa.repository.support.OneJpaRepositoryFactory.java Source code

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Here is the source code for com.sinosoft.one.data.jpa.repository.support.OneJpaRepositoryFactory.java

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/*
 * Copyright 2008-2011 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 com.sinosoft.one.data.jpa.repository.support;

import com.sinosoft.one.data.jpa.repository.query.OneJpaQueryLookupStrategy;
import com.sinosoft.one.data.jpa.repository.query.OneQueryLookupStrategy;
import com.sinosoft.one.data.jpa.repository.query.OneQueryLookupStrategy.Key;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.query.QueryExtractor;
import org.springframework.data.jpa.repository.support.*;
import org.springframework.data.querydsl.QueryDslPredicateExecutor;
import org.springframework.data.repository.core.RepositoryMetadata;
import org.springframework.util.Assert;

import javax.persistence.EntityManager;
import java.io.Serializable;

import static org.springframework.data.querydsl.QueryDslUtils.QUERY_DSL_PRESENT;

/**
 * JPA specific generic repository factory.
 * 
 * @author Oliver Gierke
 */
public class OneJpaRepositoryFactory extends OneRepositoryFactorySupport {

    private final EntityManager entityManager;
    private final QueryExtractor extractor;
    private final LockModeRepositoryPostProcessor lockModePostProcessor;

    /**
     * Creates a new {@link OneJpaRepositoryFactory}.
     *
     * @param entityManager must not be {@literal null}
     */
    public OneJpaRepositoryFactory(EntityManager entityManager) {

        Assert.notNull(entityManager);
        this.entityManager = entityManager;
        this.extractor = PersistenceProvider.fromEntityManager(entityManager);
        this.lockModePostProcessor = LockModeRepositoryPostProcessor.INSTANCE;

        addRepositoryProxyPostProcessor(lockModePostProcessor);
    }

    /*
     * (non-Javadoc)
     *
     * @see
     * org.springframework.data.repository.support.RepositoryFactorySupport#
     * getTargetRepository(java.lang.Class)
     */

    protected Object getTargetRepository(RepositoryMetadata metadata) {

        return getTargetRepository(metadata, entityManager);
    }

    /**
     * Callback to create a {@link org.springframework.data.jpa.repository.JpaRepository} instance with the given {@link javax.persistence.EntityManager}
     *
     * @param <T>
     * @param <ID>
     * @param entityManager
     * @see #getTargetRepository(org.springframework.data.repository.core.RepositoryMetadata)
     * @return
     */
    @SuppressWarnings({ "unchecked", "rawtypes" })
    protected <T, ID extends Serializable> JpaRepository<?, ?> getTargetRepository(RepositoryMetadata metadata,
            EntityManager entityManager) {

        Class<?> repositoryInterface = metadata.getRepositoryInterface();
        JpaEntityInformation<?, Serializable> entityInformation = getEntityInformation(metadata.getDomainType());

        SimpleJpaRepository<?, ?> repo = isQueryDslExecutor(repositoryInterface)
                ? new QueryDslJpaRepository(entityInformation, entityManager)
                : new SimpleJpaRepository(entityInformation, entityManager);
        repo.setLockMetadataProvider(lockModePostProcessor.getLockMetadataProvider());

        return repo;
    }

    /*
     * (non-Javadoc)
     * 
     * @see
     * org.springframework.data.repository.support.RepositoryFactorySupport#
     * getRepositoryBaseClass()
     */

    protected Class<?> getRepositoryBaseClass(RepositoryMetadata metadata) {

        if (isQueryDslExecutor(metadata.getRepositoryInterface())) {
            return QueryDslJpaRepository.class;
        } else {
            return SimpleJpaRepository.class;
        }
    }

    /**
     * Returns whether the given repository interface requires a QueryDsl specific implementation to be chosen.
     * 
     * @param repositoryInterface
     * @return
     */
    private boolean isQueryDslExecutor(Class<?> repositoryInterface) {

        return QUERY_DSL_PRESENT && QueryDslPredicateExecutor.class.isAssignableFrom(repositoryInterface);
    }

    /*
     * (non-Javadoc)
     * 
     * @see
     * org.springframework.data.repository.support.RepositoryFactorySupport#
     * getQueryLookupStrategy
     * (org.springframework.data.repository.query.QueryLookupStrategy.Key)
     */

    protected OneQueryLookupStrategy getQueryLookupStrategy(Key key) {

        return OneJpaQueryLookupStrategy.create(entityManager, key, extractor);
    }

    /*
     * (non-Javadoc)
     * 
     * @see
     * org.springframework.data.repository.support.RepositoryFactorySupport#
     * getEntityInformation(java.lang.Class)
     */

    @SuppressWarnings("unchecked")
    public <T, ID extends Serializable> JpaEntityInformation<T, ID> getEntityInformation(Class<T> domainClass) {

        return (JpaEntityInformation<T, ID>) JpaEntityInformationSupport.getMetadata(domainClass, entityManager);
    }
}