DMDirc-Util/src/com/dmdirc/util/collections/URLEncodingMapFlattener.java

/*
 * Copyright (c) 2006-2014 DMDirc Developers
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package com.dmdirc.util.collections;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.Map;
import java.util.function.Function;
import java.util.stream.Stream;

/**
 * Flattens a map into a key=value pair, URLEncoding both the key and the entry.
 */
public class URLEncodingMapFlattener
        implements Function<Map.Entry<String, String>, Stream<String>> {

    @Override
    public Stream<String> apply(final Map.Entry<String, String> entry) {
        String key;
        String value;
        try {
            key = URLEncoder.encode(entry.getKey(), "UTF-8");
            value = URLEncoder.encode(entry.getValue(), "UTF-8");
        } catch (UnsupportedEncodingException ex){
            key = entry.getKey();
            value = entry.getValue();
        }
        return Stream.of(key + '=' + value);
    }
}