/**
* Copyright 2014 Duan Bingnan
*
* 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 org.pinus4j.api.query.impl;
import java.lang.reflect.Array;
import java.util.List;
import org.pinus4j.api.query.IQuery;
import org.pinus4j.cluster.beans.IShardingKey;
import org.pinus4j.cluster.enums.EnumDBMasterSlave;
import org.pinus4j.datalayer.query.IGlobalQuery;
import org.pinus4j.datalayer.query.IShardingQuery;
import org.pinus4j.entity.DefaultEntityMetaManager;
import org.pinus4j.entity.IEntityMetaManager;
import org.pinus4j.entity.meta.EntityPK;
import org.pinus4j.entity.meta.PKName;
import org.pinus4j.entity.meta.PKValue;
import com.google.common.collect.Lists;
/**
* 可以获取结果集的查询条件
*
* @author shanwei Jul 27, 2015 6:12:23 PM
*/
public class ResultSetableQueryImpl<T> extends DefaultQueryImpl<T> {
private IGlobalQuery globalQuery;
private IShardingQuery shardingQuery;
private IShardingKey<?> shardingKey;
private boolean useCache = true;
private EnumDBMasterSlave masterSlave = EnumDBMasterSlave.AUTO;
private IEntityMetaManager entityMetaManager = DefaultEntityMetaManager.getInstance();
/**
* 将当前Query查询转换为PK查询，提高缓存的命中率.
*
* @return
*/
private List<EntityPK> coverToEntityPK() {
List<EntityPK> entityPkList = Lists.newArrayList();
// 判断查询条件是否和主键名数量一致
PKName[] pkNames = entityMetaManager.getPkName(this.clazz);
if (pkNames.length != this.condList.size()) {
return null;
}
// 判断查询条件是否满足只是包含主键查询并且条件之间是or关系
boolean isMatch = true;
Condition cond = null;
for (int i = 0; i < this.condList.size(); i++) {
cond = this.condList.get(i);
// 主键之间是or
if (i > 0 && cond.getConditionRelation() != ConditionRelation.OR) {
isMatch = false;
break;
}
// 判断单主键是否满足条件
else if (pkNames.length == 1 && (cond.getOrCond() == null || cond.getOrCond().length == 0)
&& (cond.getAndCond() == null || cond.getAndCond().length == 0)
&& cond.getField().equals(pkNames[0].getValue())) {
if (cond.getOpt() == QueryOpt.EQ) {
PKValue[] pkValues = new PKValue[] { PKValue.valueOf(cond.getValue()) };
entityPkList.add(EntityPK.valueOf(pkNames, pkValues));
}
if (cond.getOpt() == QueryOpt.IN) {
Object obj = null;
PKValue[] pkValues = null;
for (int j = 0; j < Array.getLength(cond.getValue()); j++) {
obj = Array.get(cond.getValue(), j);
pkValues = new PKValue[] { PKValue.valueOf(obj) };
entityPkList.add(EntityPK.valueOf(pkNames, pkValues));
}
}
}
// 判断联合主键是否满足条件
else if (pkNames.length > 1 && (cond.getOrCond() == null || cond.getOrCond().length == 0)
&& cond.getAndCond() != null && cond.getAndCond().length == pkNames.length && cond.isAndCondAllEQ()) {
PKValue[] pkValues = new PKValue[cond.getAndCond().length];
for (int j = 0; j < cond.getAndCond().length; j++) {
if (!pkNames[j].getValue().equals(cond.getAndCond()[j].getField())) {
isMatch = false;
break;
}
pkValues[j] = PKValue.valueOf(cond.getAndCond()[j].getValue());
}
entityPkList.add(EntityPK.valueOf(pkNames, pkValues));
} else {
isMatch = false;
}
}
if (!isMatch) {
return null;
}
return entityPkList;
}
public ResultSetableQueryImpl(Class<T> clazz) {
super.clazz = clazz;
}
@Override
public T load() {
List<T> result = list();
if (result.isEmpty()) {
return null;
}
return result.get(0);
}
@Override
public List<T> list() {
List<T> result = null;
List<EntityPK> entityPkList = coverToEntityPK();
if (entityMetaManager.isShardingEntity(clazz)) {
if (entityPkList != null && !entityPkList.isEmpty())
if (this.shardingKey != null)
result = this.shardingQuery.findByPkList(entityPkList, this.shardingKey, this.clazz,
this.orderList, this.useCache, this.masterSlave);
else
result = this.shardingQuery.findByPkList(entityPkList, this.clazz, this.orderList, this.useCache,
this.masterSlave);
else if (this.shardingKey != null)
result = this.shardingQuery.findByQuery(this, this.shardingKey, this.clazz, this.useCache,
this.masterSlave);
else
result = this.shardingQuery.findByQuery(this, this.clazz, this.useCache, this.masterSlave);
} else {
if (entityPkList != null && !entityPkList.isEmpty())
result = this.globalQuery.findByPkList(entityPkList, this.clazz, this.orderList, this.useCache,
this.masterSlave);
else
result = this.globalQuery.findByQuery(this, this.clazz, this.useCache, this.masterSlave);
}
return result;
}
@Override
public Number count() {
Number count = 0;
if (entityMetaManager.isShardingEntity(clazz)) {
if (this.shardingKey != null) {
if (this.isEffect()) {
count = this.shardingQuery.getCountByQuery(this, this.shardingKey, this.clazz, this.useCache,
this.masterSlave);
} else {
count = this.shardingQuery.getCount(this.shardingKey, this.clazz, this.useCache, this.masterSlave);
}
} else {
if (this.isEffect()) {
count = this.shardingQuery.getCountByQuery(this, this.clazz, this.useCache, this.masterSlave);
} else {
count = this.shardingQuery.getCount(this.clazz, this.useCache, this.masterSlave);
}
}
} else {
if (this.isEffect()) {
count = this.globalQuery.getCountByQuery(this, this.clazz, this.useCache, this.masterSlave);
} else {
count = this.globalQuery.getCount(this.clazz, this.useCache, this.masterSlave);
}
}
return count;
}
@Override
public IQuery<T> setShardingKey(IShardingKey<?> shardingKey) {
this.shardingKey = shardingKey;
return this;
}
@Override
public IQuery<T> setMasterSlave(EnumDBMasterSlave masterSlave) {
this.masterSlave = masterSlave;
return this;
}
@Override
public IQuery<T> setUseCache(boolean useCache) {
this.useCache = useCache;
return this;
}
@Override
public IQuery<T> clone() {
ResultSetableQueryImpl<T> clone = new ResultSetableQueryImpl<T>(this.clazz);
clone.fields = this.fields;
clone.condList.addAll(this.condList);
clone.orderList.addAll(this.orderList);
clone.start = this.start;
clone.limit = this.limit;
clone.globalQuery = this.globalQuery;
clone.shardingQuery = this.shardingQuery;
clone.shardingKey = this.shardingKey;
clone.useCache = this.useCache;
clone.masterSlave = this.masterSlave;
clone.entityMetaManager = this.entityMetaManager;
return clone;
}
@Override
public void clean() {
super.clean();
this.shardingKey = null;
this.useCache = true;
this.masterSlave = EnumDBMasterSlave.AUTO;
}
public IGlobalQuery getGlobalQuery() {
return globalQuery;
}
public void setGlobalQuery(IGlobalQuery globalQuery) {
this.globalQuery = globalQuery;
}
public IShardingQuery getShardingQuery() {
return shardingQuery;
}
public void setShardingQuery(IShardingQuery shardingQuery) {
this.shardingQuery = shardingQuery;
}
}