/*
* Copyright (c) 2017 西安才多信息技术有限责任公司。
* 项目名称：dev-admin
* 文件名称：JpaBaseDaoImpl.java
* 日期：17-5-31 下午6:39
* 作者：yangyan
*
*/
package cn.firegod.common.jpa;
import cn.firegod.common.Page;
import cn.firegod.common.PageList;
import cn.firegod.dev.vo.CurrentUser;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Repository;
import javax.persistence.EntityManager;
import javax.persistence.EntityTransaction;
import javax.persistence.Query;
import java.beans.PropertyDescriptor;
import java.io.Serializable;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.sql.Timestamp;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
/**
* 功能：JPA dao 基础类，一个jpa的dao类继承此抽象类后，需要实现 setEntityManager 方法，注入数据源
* 作者： yangyan
* 时间： 2014/12/17 .
*/
@Repository
public abstract class JpaBaseDaoImpl<T, PK extends Serializable> implements JpaBaseDao<T, PK> {
private Class<T> entityClass;
protected EntityManager entityManager;
/**
* 需要注意具体的数据源
*
* @param entityManager
*/
protected abstract void setEntityManager(EntityManager entityManager);
protected JpaBaseDaoImpl() {
Class c = getClass();
Type type = c.getGenericSuperclass();
if (type instanceof ParameterizedType) {
Type[] parameterizedType = ((ParameterizedType) type)
.getActualTypeArguments();
this.entityClass = (Class<T>) parameterizedType[0];
}
}
private String getIdPropertyName() {
String idProperty = entityManager.getMetamodel().entity(entityClass).getId(entityManager.getMetamodel().entity(entityClass).getIdType().getJavaType()).getName();
return idProperty;
}
@Override
public T getById(PK id) {
return entityManager.find(entityClass, id);
}
@Override
public T loadById(PK id) {
return entityManager.getReference(entityClass, id);
}
@Override
public <T> T getPropertyById(PK id, String propertyName, Class<T> clazz) {
Object obj = entityManager.createQuery("select " + propertyName + " from " + entityClass.getName() + " where " + getIdPropertyName() + " = :id").setParameter("id", id).getSingleResult();
return obj == null ? null : (T) obj;
}
@Override
public void save(T model) {
this.preInsert(model);
entityManager.persist(model);
}
@Override
public void saveOrUpdate(T model) {
entityManager.merge(model);
}
@Override
public void delete(T model) {
entityManager.remove(model);
}
@Override
public void deleteById(PK... id) {
if (id != null) {
for (PK pk : id) {
if (pk != null) {
entityManager.remove(entityManager.getReference(entityClass, pk));
}
}
}
}
@Override
public boolean deleteAll() {
String hql = "delete " + this.entityClass.getName();
this.execute(hql);
return true;
}
@Override
public void execute(String hql, List<Object> params) {
this.execute(hql, params != null ? params.toArray() : null);
}
@Override
public void execute(String hql, Object... params) {
Query query = entityManager.createQuery(hql);
for (int i = 0; i < params.length; i++) {
query.setParameter(i, params);
}
query.executeUpdate();
}
@Override
public void incr(PK id, String propertyName) {
entityManager.createQuery("update " + entityClass.getName() + " set " + propertyName + "=" + propertyName + "+1 where " + getIdPropertyName() + " =:id")
.setParameter("id", id).executeUpdate();
}
@Override
public void incr(PK id, String propertyName, Integer n) {
entityManager.createQuery("update " + entityClass.getName() + " set " + propertyName + "=" + propertyName + "+:n where " + getIdPropertyName() + " =:id")
.setParameter("n", n).setParameter("id", id).executeUpdate();
}
@Override
public void update(T model) {
this.preUpdate(model);
entityManager.merge(model);
}
@Override
public void updateProperty(PK id, String propertyName, Object status) {
entityManager.createQuery("update " + entityClass.getName() + " set " + propertyName + "=:v where " + getIdPropertyName() + " =:id")
.setParameter("v", status).setParameter("id", id).executeUpdate();
}
@Override
public void updateProperties(PK id, String[] propertyNames, Object[] values) {
String hql = "update " + entityClass.getName() + " set ";
for (int i = 0; i < propertyNames.length; i++) {
hql += propertyNames[i] + "= :v" + i;
if (i < propertyNames.length) {
hql += ",";
}
}
hql += " where " + getIdPropertyName() + " =:id";
Query query = entityManager.createQuery(hql);
for (int i = 0; i < values.length; i++) {
query.setParameter("v" + i, values[i]);
}
query.setParameter("id", id).executeUpdate();
}
private void preInsert(T model) {
try {
Method setCreateDate = this.entityClass.getMethod("setCreateDate", Timestamp.class);
if (setCreateDate != null) {
setCreateDate.invoke(model, new Timestamp(System.currentTimeMillis()));
}
Method setCreateBy = this.entityClass.getMethod("setCreateBy", Integer.class);
if (setCreateBy != null) {
setCreateBy.invoke(model, CurrentUser.getCurrentUserId());
}
} catch (NoSuchMethodException e) {
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
try {
Method delFlag = this.entityClass.getMethod("setDelFlag", Boolean.class);
if (delFlag != null) {
delFlag.invoke(model, false);
}
} catch (NoSuchMethodException e) {
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
this.preUpdate(model);
}
private void preUpdate(T model) {
try {
Method setUpdateDate = this.entityClass.getMethod("setUpdateDate", Timestamp.class);
if (setUpdateDate != null) {
setUpdateDate.invoke(model, new Timestamp(System.currentTimeMillis()));
}
Method setUpdateBy = this.entityClass.getMethod("setUpdateBy", Integer.class);
if (setUpdateBy != null) {
setUpdateBy.invoke(model, CurrentUser.getCurrentUserId());
}
} catch (NoSuchMethodException e) {
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
}
@Override
public void updateNotNullProperties(T obj) {
preUpdate(obj);
String idName = getIdPropertyName();
Object idValue = null;
String hql = "update " + entityClass.getName() + " set ";
List<String> names = new ArrayList<>();
List<Object> values = new ArrayList<>();
PropertyDescriptor[] propertyDescriptors = BeanUtils.getPropertyDescriptors(this.entityClass);
for (PropertyDescriptor propertyDescriptor : propertyDescriptors) {
try {
Method readMethod = propertyDescriptor.getReadMethod();
String name = propertyDescriptor.getName();
if ("class".equals(name)) {
continue;
}
Object v = null;
if (readMethod != null && (v = readMethod.invoke(obj)) != null) {
if (name.equals(idName)) {
idValue = v;
continue;
} else {
names.add(name);
values.add(v);
}
}
} catch (IllegalAccessException e) {
} catch (InvocationTargetException e) {
e.printStackTrace();
}
}
for (int i = 0; i < names.size(); i++) {
hql += names.get(i) + "= :v" + i;
if (i+1 < names.size()) {
hql += ",";
}
}
hql += " where " + getIdPropertyName() + " =:id";
Query query = entityManager.createQuery(hql);
for (int i = 0; i < values.size(); i++) {
query.setParameter("v" + i, values.get(i));
}
query.setParameter("id", idValue);
query.executeUpdate();
}
@Override
public List<T> findAll() {
return entityManager.createQuery("from " + entityClass.getName()).getResultList();
}
@Override
public List<T> findListByProperty(String properName, Object value) {
return entityManager.createQuery("from " + entityClass.getName() + " where " + properName + "=:v").setParameter("v", value).getResultList();
}
@Override
public <T> List<T> findListByProperty(Class<T> resultClass, String getPropertyName, String propertyName, Object value) {
return null;
}
@Override
public List<T> findList(String hql, Object... params) {
return this.findList(this.entityClass, hql, params);
}
@Override
public <T> List<T> findList(Class<T> clazz, String hql, List<Object> params) {
return findList(clazz, hql, params != null ? params.toArray() : null);
}
@Override
public <T> List<T> findList(Class<T> clazz, String hql, Object... params) {
Query query = entityManager.createQuery(hql);
for (int i = 0; i < params.length; i++) {
query.setParameter(i, params[i]);
}
List resultList = query.getResultList();
return resultList;
}
@Override
public <T> List<T> findListLimit(Class<T> clazz, String hql, int limit, List<Object> params) {
return findListLimit(clazz, hql, limit, params != null ? params.toArray() : null);
}
@Override
public <T> List<T> findListLimit(Class<T> clazz, String hql, int limit, Object... params) {
Query query = entityManager.createQuery(hql);
for (int i = 0; i < params.length; i++) {
query.setParameter(i, params[i]);
}
query.setFirstResult(0);
query.setMaxResults(limit);
List resultList = query.getResultList();
return resultList;
}
@Override
public <T> PageList<T> findPageList(Page page, Class<T> clazz, String hql, Object... params) {
Query query = entityManager.createQuery(hql);
if (page instanceof Page.Offset) {
query.setFirstResult(((Page.Offset) page).getStart()).setMaxResults(
((Page.Offset) page).getLimit());
} else {
query.setFirstResult((page.getPage() - 1) * page.getPageSize())
.setMaxResults(page.getPageSize());
}
if (params != null) {
for (int i = 0; i < params.length; i++) {
query.setParameter(i, params[i]);
}
}
page.setTotal(this.getTotalCount(hql, params));
return new PageList(page, query.getResultList());
}
@Override
public <T> PageList<T> findPageList(Page page, Class<T> clazz, String hql, List<Object> params) {
return findPageList(page, clazz, hql, params.toArray());
}
@Override
public T getUniqueResultByProperty(String propertyName, Object value) {
return this.getUniqueResult("from " + this.entityClass.getName()
+ " where " + propertyName + "=?", value);
}
@Override
public void deleteResultsByProperty(String propertyName, Object value) {
Query query = entityManager.createQuery("delete from " + entityClass.getName() + " where " + propertyName + " = ?");
query.setParameter(0, value);
query.executeUpdate();
}
@Override
public void deleteResultsByPropertyInValues(String propertyName, Object... value) {
String s = StringUtils.leftPad("?", value.length * 2 - 1, "?,");
Query query = entityManager.createQuery("delete from " + entityClass.getName() + " where " + propertyName + " in (" + s + ") ");
for (int i = 0; i < value.length; i++) {
query.setParameter(i, value[i]);
}
query.executeUpdate();
}
@Override
public T getUniqueResult(String hql, Object... params) {
return getUniqueResult(this.entityClass, hql, params);
}
@Override
public <T> T getUniqueResult(Class<T> clazz, String hql, List<Object> params) {
Query q = entityManager.createQuery(hql);
if (params != null) {
for (int i = 0; i < params.size(); i++) {
q.setParameter(i, params.get(i));
}
}
q.setFirstResult(0);
q.setMaxResults(1);
List list = q.getResultList();
if (list == null || list.isEmpty() || list.get(0) == null) {
return null;
}
return (T) list.get(0);
}
@Override
public <T> T getUniqueResult(Class<T> clazz, String hql, Object... params) {
return this.getUniqueResult(clazz, hql,
params == null ? null : Arrays.asList(params));
}
@Override
public PageList<T> findByPage(Page page, String hql, List<Object> params) {
Query q = entityManager.createQuery(hql);
if (page instanceof Page.Offset) {
q.setFirstResult(((Page.Offset) page).getStart()).setMaxResults(
((Page.Offset) page).getLimit());
} else {
q.setFirstResult((page.getPage() - 1) * page.getPageSize())
.setMaxResults(page.getPageSize());
}
if (params != null) {
for (int i = 0; i < params.size(); i++) {
q.setParameter(i, params.get(i));
}
}
page.setTotal(this.getTotalCount(hql, params));
return new PageList(page, q.getResultList());
}
@Override
public PageList<T> findByPage(Page page, String hql, Object... params) {
return this.findByPage(page, hql, params == null ? null : Arrays.asList(params));
}
@Override
public PageList<T> findByPage(Page page) {
return this.findByPage(page, "from " + this.entityClass.getName(),
Collections.EMPTY_LIST);
}
@Override
public void flush() {
entityManager.flush();
}
@Override
public void clear() {
entityManager.clear();
}
@Override
public void evict(Object o) {
entityManager.detach(o);
}
@Override
public boolean isExist(String propertyName, Object value) {
String hql = "select count(*) from " + entityClass.getName()
+ " where " + propertyName + "=?";
Query q = entityManager.createQuery(hql);
q.setParameter(0, value);
return (Long) q.getSingleResult() > 0;
}
@Override
public long getTotalCount() {
String hql = "select count(*) from " + entityClass.getName();
return Long.valueOf(entityManager.createQuery(hql).getSingleResult()
.toString());
}
@Override
public long getTotalCount(String hql, List<Object> params) {
Query q = entityManager.createQuery(prepareCountHql(hql));
if (params != null) {
for (int i = 0; i < params.size(); i++) {
q.setParameter(i, params.get(i));
}
}
Object singleResult = q.getSingleResult();
if (singleResult instanceof Object[]) {
return Long.valueOf(((Object[]) singleResult)[0].toString()).longValue();
}
return Long.valueOf(singleResult.toString()).longValue();
}
protected String prepareCountHql(String hql) {
String fromHql = hql;
fromHql = " from " + StringUtils.substringAfter(fromHql, "from ");
fromHql = StringUtils.substringBefore(fromHql, "order by");
//取出查询的字段
String selectWhat = StringUtils.substringBetween(hql, "select", "from");
// 如果是new ClassName (x.x.x)格式的处理
if (selectWhat != null && selectWhat.contains("new ") && selectWhat.contains("(") && selectWhat.contains(")")) {
selectWhat = StringUtils.substringBetween(selectWhat, "(", ")");
}
// 第一列查询总行数
String countHql = "select count(*)" + (selectWhat == null ? "" : ", " + selectWhat + " ") + fromHql;
return countHql;
}
@Override
public long getTotalCount(String hql, Object... params) {
return this.getTotalCount(hql,
params == null ? null : Arrays.asList(params));
}
@Override
public void beginTransaction() {
EntityTransaction transaction = entityManager.getTransaction();
transaction.begin();
}
@Override
public void commitTransaction() {
EntityTransaction transaction = entityManager.getTransaction();
transaction.commit();
}
@Override
public void rollbackTransaction() {
EntityTransaction transaction = entityManager.getTransaction();
transaction.rollback();
}
}
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