com.gs.fw.common.mithra.finder.ChainedDeepFetchStrategy Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of reladomo Show documentation
Show all versions of reladomo Show documentation
Reladomo is an object-relational mapping framework.
/*
Copyright 2016 Goldman Sachs.
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.gs.fw.common.mithra.finder;
import com.gs.fw.common.mithra.attribute.Attribute;
import com.gs.fw.common.mithra.finder.orderby.OrderBy;
import com.gs.fw.common.mithra.tempobject.TupleTempContext;
import com.gs.fw.common.mithra.util.InternalList;
import com.gs.collections.impl.list.mutable.FastList;
import com.gs.fw.common.mithra.util.ListFactory;
import java.util.List;
public class ChainedDeepFetchStrategy extends DeepFetchStrategy
{
private final InternalList chainedStrategies;
public ChainedDeepFetchStrategy(Mapper mapper, OrderBy orderBy)
{
List unChainedMappers = mapper.getUnChainedMappers();
chainedStrategies = new InternalList(unChainedMappers.size());
Mapper parent = mapper.getParentMapper();
Mapper grandParent = mapper.getParentMapper();
Mapper alternateMapper = null;
for(int i=0;i 1)
{
alternateMapper = new ChainedMapper(alternateMapper, unChainedMappers.get(i));
}
Mapper alternateMapperWithParent = alternateMapper;
if (grandParent != null && alternateMapperWithParent != null)
{
alternateMapperWithParent = grandParent.link(alternateMapper);
}
DelegatingSingleLinkDeepFetchStrategy delegatingStrategy = new DelegatingSingleLinkDeepFetchStrategy(nextParent, i == unChainedMappers.size() - 1 ? orderBy : null, alternateMapperWithParent, i);
chainedStrategies.add(delegatingStrategy);
parent = nextParent;
}
}
public List deepFetch(DeepFetchNode node, boolean bypassCache, boolean forceImplicitJoin)
{
//todo: make sure allocation doesn't happen twice!!!
node.allocatedChainedResults(chainedStrategies.size());
FastList result = new FastList(chainedStrategies.size());
for(int i=0;i