/*
* Copyright 2012 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
*
* 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.springframework.data.gemfire.mapping;
import static org.springframework.data.gemfire.util.RuntimeExceptionFactory.newIllegalArgumentException;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import org.apache.geode.cache.Region;
import org.springframework.data.mapping.context.MappingContext;
import org.springframework.util.Assert;
/**
* Simple value object to abstract access to regions by name and mapped type.
*
* @author Oliver Gierke
* @author John Blum
*/
public class Regions implements Iterable<Region<?, ?>> {
private final Map<String, Region<?, ?>> regions;
private final MappingContext<? extends GemfirePersistentEntity<?>, ?> mappingContext;
/**
* Creates a new {@link Regions} wrapper for the given {@link Region}s and
* {@link MappingContext}.
*
* @param regions must not be {@literal null}.
* @param mappingContext must not be {@literal null}.
*/
public Regions(Iterable<Region<?, ?>> regions,
MappingContext<? extends GemfirePersistentEntity<?>, ?> mappingContext) {
Assert.notNull(regions, "Regions must not be null");
Assert.notNull(mappingContext, "MappingContext must not be null");
Map<String, Region<?, ?>> regionMap = new HashMap<>();
for (Region<?, ?> region : regions) {
regionMap.put(region.getName(), region);
regionMap.put(region.getFullPath(), region);
}
this.regions = Collections.unmodifiableMap(regionMap);
this.mappingContext = mappingContext;
}
/**
* Returns the {@link Region} the given type is mapped to. Will try to find
* a {@link Region} with the simple class name in case no mapping
* information is found.
*
* @param <T> the Region value class type.
* @param entityType must not be {@literal null}.
* @return the {@link Region} the given type is mapped to.
*/
@SuppressWarnings("unchecked")
public <T> Region<?, T> getRegion(Class<T> entityType) {
Assert.notNull(entityType, "Entity type must not be null");
String regionName = this.mappingContext.getPersistentEntity(entityType).map((entity) -> entity.getRegionName())
.orElseGet(entityType::getSimpleName);
return (Region<?, T>) this.regions.get(regionName);
}
/**
* Returns the {@link Region} with the given name or path.
*
* @param <S> the Region key class type.
* @param <T> the Region value class type.
* @param namePath must not be {@literal null}, and either identifies the Region by name or the fully-qualified path.
* @return the {@link Region} with the given name or path.
*/
@SuppressWarnings("unchecked")
public <S, T> Region<S, T> getRegion(String namePath) {
Assert.hasText(namePath, "Region name/path is required");
return (Region<S, T>) this.regions.get(namePath);
}
/*
* (non-Javadoc)
*
* @see java.lang.Iterable#iterator()
*/
@Override
public Iterator<Region<?, ?>> iterator() {
return this.regions.values().iterator();
}
}