org.canova.api.io.serializers.SerializationFactory Maven / Gradle / Ivy
/*
*
* *
* * * Copyright 2015 Skymind,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.canova.api.io.serializers;
import org.canova.api.conf.Configuration;
import org.canova.api.conf.Configured;
import org.canova.api.util.ReflectionUtils;
import org.canova.api.util.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.ArrayList;
import java.util.List;
/**
*
* A factory for {@link Serialization}s.
*
*/
public class SerializationFactory extends Configured {
private static final Logger LOG =
LoggerFactory.getLogger(SerializationFactory.class.getName());
private List> serializations = new ArrayList<>();
/**
*
* Serializations are found by reading the io.serializations
* property from conf, which is a comma-delimited list of
* classnames.
*
*/
public SerializationFactory(Configuration conf) {
super(conf);
for (String serializerName : conf.getStrings("io.serializations",
new String[]{"org.apache.hadoop.io.serializer.WritableSerialization"})) {
add(conf, serializerName);
}
}
@SuppressWarnings("unchecked")
private void add(Configuration conf, String serializationName) {
try {
Class serializationClass =
(Class) conf.getClassByName(serializationName);
serializations.add(
ReflectionUtils.newInstance(serializationClass, getConf()));
} catch (ClassNotFoundException e) {
LOG.warn("Serialization class not found: " +
StringUtils.stringifyException(e));
}
}
public Serializer getSerializer(Class c) {
return getSerialization(c).getSerializer(c);
}
public Deserializer getDeserializer(Class c) {
return getSerialization(c).getDeserializer(c);
}
@SuppressWarnings("unchecked")
public Serialization getSerialization(Class c) {
for (Serialization serialization : serializations) {
if (serialization.accept(c)) {
return (Serialization) serialization;
}
}
return null;
}
}