/*
* Copyright 2008-present MongoDB, 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.
*/
package org.bson.codecs;
import org.bson.BsonType;
import org.bson.codecs.configuration.CodecConfigurationException;
import org.bson.codecs.configuration.CodecRegistry;
import static java.lang.String.format;
import static org.bson.assertions.Assertions.notNull;
An efficient map of BsonType to Codec
Since: 3.3
/**
* An efficient map of BsonType to Codec
*
* @since 3.3
*/
public class BsonTypeCodecMap {
private final BsonTypeClassMap bsonTypeClassMap;
private final Codec<?>[] codecs = new Codec<?>[256];
Initializes the map by iterating the keys of the given BsonTypeClassMap and looking up the Codec for the Class mapped to each key.
Params: - bsonTypeClassMap – the non-null BsonTypeClassMap
- codecRegistry – the non-null CodecRegistry
/**
* Initializes the map by iterating the keys of the given BsonTypeClassMap and looking up the Codec for the Class mapped to each key.
* @param bsonTypeClassMap the non-null BsonTypeClassMap
* @param codecRegistry the non-null CodecRegistry
*/
public BsonTypeCodecMap(final BsonTypeClassMap bsonTypeClassMap, final CodecRegistry codecRegistry) {
this.bsonTypeClassMap = notNull("bsonTypeClassMap", bsonTypeClassMap);
notNull("codecRegistry", codecRegistry);
for (BsonType cur : bsonTypeClassMap.keys()) {
Class<?> clazz = bsonTypeClassMap.get(cur);
if (clazz != null) {
try {
codecs[cur.getValue()] = codecRegistry.get(clazz);
} catch (CodecConfigurationException e) {
// delay reporting this until the codec is actually requested
}
}
}
}
Gets the Codec mapped to the given bson type.
Params: - bsonType – the non-null BsonType
Returns: the non-null Codec
/**
* Gets the Codec mapped to the given bson type.
*
* @param bsonType the non-null BsonType
* @return the non-null Codec
*/
public Codec<?> get(final BsonType bsonType) {
Codec<?> codec = codecs[bsonType.getValue()];
if (codec == null) {
Class<?> clazz = bsonTypeClassMap.get(bsonType);
if (clazz == null) {
throw new CodecConfigurationException(format("No class mapped for BSON type %s.", bsonType));
} else {
throw new CodecConfigurationException(format("Can't find a codec for %s.", clazz));
}
}
return codec;
}
}