org.codice.ddf.configuration.persistence.felix.FelixCfgPersistenceStrategy.java Source code

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Here is the source code for org.codice.ddf.configuration.persistence.felix.FelixCfgPersistenceStrategy.java

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/**
 * Copyright (c) Codice Foundation
 *
 * <p>This is free software: you can redistribute it and/or modify it under the terms of the GNU
 * Lesser General Public License as published by the Free Software Foundation, either version 3 of
 * the License, or any later version.
 *
 * <p>This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details. A copy of the GNU Lesser General Public
 * License is distributed along with this program and can be found at
 * <http://www.gnu.org/licenses/lgpl.html>.
 */
package org.codice.ddf.configuration.persistence.felix;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Dictionary;
import java.util.Enumeration;
import java.util.Hashtable;
import org.apache.commons.lang.Validate;
import org.apache.felix.utils.properties.Properties;
import org.codice.ddf.configuration.persistence.PersistenceStrategy;

/** Class that persists configuration properties using the Felix cfg file format. */
public class FelixCfgPersistenceStrategy implements PersistenceStrategy {
    @Override
    public String getExtension() {
        return "cfg";
    }

    @Override
    public void write(OutputStream out, Dictionary<String, Object> properties) throws IOException {
        Validate.notNull(out, "invalid null output stream");
        Validate.notNull(properties, "invalid null properties");
        final Properties props = new Properties();
        final Enumeration<String> keys = properties.keys();

        while (keys.hasMoreElements()) {
            String key = keys.nextElement();
            props.put(key, (String) properties.get(key));
        }
        props.save(out);
    }

    @Override
    public Dictionary<String, Object> read(InputStream in) throws IOException {
        Validate.notNull(in, "invalid null input stream");
        final Properties props = new Properties();

        props.load(in);
        return new Hashtable<>(props);
    }
}