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     */
019    package org.apache.isis.viewer.restfulobjects.applib.util;
020    
021    import java.io.UnsupportedEncodingException;
022    import java.net.URLDecoder;
023    import java.net.URLEncoder;
024    import java.util.Arrays;
025    import java.util.List;
026    
027    import com.google.common.base.Charsets;
028    import com.google.common.base.Function;
029    import com.google.common.collect.Lists;
030    
031    import org.codehaus.jackson.JsonNode;
032    
033    public final class UrlEncodingUtils {
034    
035        public final static Function<String, String> FUNCTION = new Function<String, String>() {
036    
037            @Override
038            public String apply(final String input) {
039                try {
040                    return URLDecoder.decode(input, "UTF-8");
041                } catch (final UnsupportedEncodingException e) {
042                    return "";
043                }
044            }
045        };
046    
047        private UrlEncodingUtils() {
048        }
049    
050        public static String urlDecode(final String string) {
051            return FUNCTION.apply(string);
052        }
053    
054        public static List<String> urlDecode(final List<String> values) {
055            return Lists.transform(values, FUNCTION);
056        }
057    
058        public static String[] urlDecode(final String[] values) {
059            final List<String> asList = Arrays.asList(values);
060            return urlDecode(asList).toArray(new String[] {});
061        }
062    
063        public static String urlEncode(final JsonNode jsonNode) {
064            return UrlEncodingUtils.urlEncode(jsonNode.toString());
065        }
066    
067        public static String urlEncode(final String str) {
068            try {
069                return URLEncoder.encode(str, Charsets.UTF_8.name());
070            } catch (final UnsupportedEncodingException e) {
071                // shouldn't happen
072                throw new RuntimeException(e);
073            }
074        }
075    
076    }