org.apache.hconf2prop.Main.java Source code

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Here is the source code for org.apache.hconf2prop.Main.java

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/**
 * 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.apache.hconf2prop;

import org.apache.commons.io.FilenameUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.util.Iterator;
import java.util.Map;
import java.util.TreeMap;

public class Main {

    public static void convert(String arg) throws IOException {

        File input = new File(arg);
        if (!input.isFile() || !input.canRead()) {
            throw new IllegalArgumentException(arg);
        }

        Configuration conf = new Configuration();
        conf.addResource(new Path(input.toURI()));

        TreeMap<String, String> map = new TreeMap<String, String>();

        Iterator<Map.Entry<String, String>> entries = conf.iterator();
        while (entries.hasNext()) {
            Map.Entry<String, String> entry = entries.next();
            map.put(entry.getKey(), entry.getValue());
        }

        String base = FilenameUtils.getBaseName(input.getName());
        File output = new File(input.getParentFile(), base + ".prop");
        FileOutputStream stream = new FileOutputStream(output);
        Writer writer = new OutputStreamWriter(stream);
        BufferedWriter buffer = new BufferedWriter(writer);
        Iterator<String> keys = map.navigableKeySet().iterator();
        while (keys.hasNext()) {
            String key = keys.next();
            String value = map.get(key);
            String line = String.format("%s = %s", key, value);
            buffer.write(line);
            buffer.newLine();
        }
        buffer.close();

    }

    public static void main(String[] args) throws IOException {
        for (String arg : args) {
            convert(arg);
        }
    }

}