CompressionFactory.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.wikimedia.gobblin.compression;

import java.util.Map;

import org.apache.gobblin.codec.StreamCodec;
import org.apache.gobblin.compression.CompressionConfigParser;


/**
 * Duplication of {@link org.apache.gobblin.compression.CompressionFactory} to use
 * a modified instance of GzipCodec generating '.gz' extensions instead of '.gzip'.
 */
public final class CompressionFactory {
    public static StreamCodec buildStreamCompressor(Map<String, Object> properties) {
        String type = CompressionConfigParser.getCompressionType(properties);

        if (!GzipCodec.TAG.equals(type)) {
            throw new IllegalArgumentException("Can't build compressor of type " + type);
        }
        return new GzipCodec();
    }

    private CompressionFactory() {
        // can't instantiate
    }
}