ninja.leaping.configurate.objectmapping.DefaultObjectMapperFactory Maven / Gradle / Ivy
/**
* Configurate
* Copyright (C) zml and Configurate contributors
*
* 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 ninja.leaping.configurate.objectmapping;
import com.google.common.base.Preconditions;
import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import java.util.concurrent.ExecutionException;
/**
* Factory for a basic {@link ObjectMapper}
*/
public class DefaultObjectMapperFactory implements ObjectMapperFactory {
private static final ObjectMapperFactory INSTANCE = new DefaultObjectMapperFactory();
private final LoadingCache, ObjectMapper> mapperCache = CacheBuilder.newBuilder().weakKeys()
.maximumSize(500).build(new CacheLoader, ObjectMapper>() {
@Override
public ObjectMapper load(Class key) throws Exception {
return new ObjectMapper<>(key);
}
});
@Override
@SuppressWarnings("unchecked")
public ObjectMapper getMapper(Class type) throws ObjectMappingException {
Preconditions.checkNotNull(type, "type");
try {
return (ObjectMapper) mapperCache.get(type);
} catch (ExecutionException e) {
if (e.getCause() instanceof ObjectMappingException) {
throw (ObjectMappingException) e.getCause();
} else {
throw new ObjectMappingException(e);
}
}
}
public static ObjectMapperFactory getInstance() {
return INSTANCE;
}
}