com.getperka.flatpack.inject.CompositePersistenceMapper Maven / Gradle / Ivy
/*
* #%L
* FlatPack serialization code
* %%
* Copyright (C) 2012 Perka Inc.
* %%
* 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.
* #L%
*/
package com.getperka.flatpack.inject;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import com.getperka.flatpack.HasUuid;
import com.getperka.flatpack.PersistenceMapper;
/**
* A no-op implementation of PersistenceMapper.
*/
class CompositePersistenceMapper implements PersistenceMapper {
private final List mappers;
private final Map, PersistenceMapper> map =
new ConcurrentHashMap, PersistenceMapper>();
public CompositePersistenceMapper(List mappers) {
this.mappers = mappers;
}
@Override
public boolean canPersist(Class entityType) {
if (map.containsKey(entityType)) {
return map.get(entityType) != this;
}
for (PersistenceMapper mapper : mappers) {
if (mapper.canPersist(entityType)) {
map.put(entityType, mapper);
return true;
}
}
// Can't put a null value into ConcurrentHashMap, so use this instead
map.put(entityType, this);
return false;
}
@Override
public boolean isPersisted(HasUuid entity) {
if (!canPersist(entity.getClass())) {
return false;
}
map.get(entity.getClass()).isPersisted(entity);
return false;
}
}