osgi.enroute.examples.led.controller.util.Utils.java Source code

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Here is the source code for osgi.enroute.examples.led.controller.util.Utils.java

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/*******************************************************************************
 * Copyright 2015 OSGi Alliance
 *
 * 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 osgi.enroute.examples.led.controller.util;

import static com.google.common.base.Preconditions.checkNotNull;

import java.util.Dictionary;
import java.util.Iterator;
import java.util.Map;

import com.google.common.collect.Iterators;
import com.google.common.collect.Maps;

/**
 * Useful Utility Methods
 */
public final class Utils {

    /**
     * Converts legacy {@link Dictionary} ADT to {@link Map}
     *
     * @param dictionary
     *            The legacy {@link Dictionary} object to transform
     *
     * @throws NullPointerException
     *             if argument is null
     */
    public static <K, V> Map<K, V> dictionaryToMap(final Dictionary<K, V> dictionary) {
        checkNotNull(dictionary);
        final Iterator<K> keysIter = Iterators.forEnumeration(dictionary.keys());
        final Map<K, V> dict = Maps.toMap(keysIter, dictionary::get);
        return dict;
    }

    /**
     * Constructor
     */
    private Utils() {
        // Constructor
    }

}