001/*
002 *  Licensed to the Apache Software Foundation (ASF) under one
003 *  or more contributor license agreements.  See the NOTICE file
004 *  distributed with this work for additional information
005 *  regarding copyright ownership.  The ASF licenses this file
006 *  to you under the Apache License, Version 2.0 (the
007 *  "License"); you may not use this file except in compliance
008 *  with the License.  You may obtain a copy of the License at
009 *
010 *        http://www.apache.org/licenses/LICENSE-2.0
011 *
012 *  Unless required by applicable law or agreed to in writing,
013 *  software distributed under the License is distributed on an
014 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 *  KIND, either express or implied.  See the License for the
016 *  specific language governing permissions and limitations
017 *  under the License.
018 */
019package org.apache.isis.viewer.restfulobjects.applib.util;
020
021import java.io.UnsupportedEncodingException;
022import java.net.URLDecoder;
023import java.net.URLEncoder;
024import java.util.Arrays;
025import java.util.List;
026
027import org.apache.isis.viewer.restfulobjects.applib.JsonRepresentation;
028import org.codehaus.jackson.JsonNode;
029
030import com.google.common.base.Charsets;
031import com.google.common.base.Function;
032import com.google.common.collect.Lists;
033
034public final class UrlEncodingUtils {
035
036    public final static Function<String, String> FUNCTION = new Function<String, String>() {
037
038        @Override
039        public String apply(final String input) {
040            try {
041                return URLDecoder.decode(input, "UTF-8");
042            } catch (final UnsupportedEncodingException e) {
043                return "";
044            }
045        }
046    };
047
048    private UrlEncodingUtils() {
049    }
050
051    public static String urlDecode(final String string) {
052        return FUNCTION.apply(string);
053    }
054
055    public static List<String> urlDecode(final List<String> values) {
056        return Lists.transform(values, FUNCTION);
057    }
058
059    public static String[] urlDecode(final String[] values) {
060        final List<String> asList = Arrays.asList(values);
061        return urlDecode(asList).toArray(new String[] {});
062    }
063
064    public static String urlEncode(final JsonNode jsonNode) {
065        return urlEncode(jsonNode.toString());
066    }
067
068    public static String urlEncode(final JsonRepresentation jsonRepresentation ) {
069        return urlEncode(jsonRepresentation.toString());
070    }
071
072    public static String urlEncode(final String str) {
073        try {
074            return URLEncoder.encode(str, Charsets.UTF_8.name());
075        } catch (final UnsupportedEncodingException e) {
076            // shouldn't happen
077            throw new RuntimeException(e);
078        }
079    }
080
081}