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A mybatis orm enhance framework.
/*
* Copyright 2020-2022 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
*
* https://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.yuehuanghun.mybatis.milu.generic.impl;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.function.Consumer;
import org.apache.ibatis.javassist.scopedpool.SoftValueHashMap;
import com.github.pagehelper.PageHelper;
import com.yuehuanghun.mybatis.milu.criteria.Expression;
import com.yuehuanghun.mybatis.milu.criteria.Predicate;
import com.yuehuanghun.mybatis.milu.criteria.StatisticPredicate;
import com.yuehuanghun.mybatis.milu.criteria.StatisticPredicateImpl;
import com.yuehuanghun.mybatis.milu.criteria.builder.StatisticSqlTemplateBuilder;
import com.yuehuanghun.mybatis.milu.generic.GenericProviderContext;
import com.yuehuanghun.mybatis.milu.generic.GenericProviderSql;
import com.yuehuanghun.mybatis.milu.mapping.ResultMapHelper;
import com.yuehuanghun.mybatis.milu.pagehelper.Pageable;
import com.yuehuanghun.mybatis.milu.tool.Constants;
public class GenericStatisticByCriteriaProviderSql implements GenericProviderSql {
private final Map, Map> cache = new ConcurrentHashMap<>();
@SuppressWarnings({ "rawtypes", "unchecked" })
@Override
public String provideSql(GenericProviderContext context, Object params) {
Map paramMap = ((Map)params);
Object criteria = paramMap.get(Constants.CRITERIA);
if(paramMap.containsKey(Constants.RESULT_TYPE)) { //动态resultType
ResultMapHelper.setResultType((Class>) paramMap.remove(Constants.RESULT_TYPE));
}
StatisticPredicate predicate;
if(Consumer.class.isInstance(criteria)) {
predicate = new StatisticPredicateImpl();
((Consumer)criteria).accept(predicate);
} else {
predicate = (StatisticPredicate)criteria;
}
Map queryParams = new HashMap<>();
predicate.renderParams(context, queryParams, 0);
((Map)params).putAll(queryParams);
if(((Map)params).containsKey(Constants.PAGE_KEY)) {
Pageable page = (Pageable)((Map)params).get(Constants.PAGE_KEY);
PageHelper.startPage(page.getPageNum(), page.getPageSize(), page.isCount());
}
String sqlExpression = cache.computeIfAbsent(context.getMapperType(), (clazz) -> {
return new SoftValueHashMap<>();
}).computeIfAbsent(predicate, (key) -> {
return new StatisticSqlTemplateBuilder(context, predicate).build();
});
return sqlExpression;
}
@Override
public String getMethodName() {
return "statisticByCriteria";
}
}
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