/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.usergrid.utils;


import java.net.URI;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.http.NameValuePair;
import org.apache.http.client.utils.URLEncodedUtils;


public class HttpUtils {

    public static Map<String, List<String>> parseQueryString( String queryString ) {
        Map<String, List<String>> mapOfLists = new HashMap<String, List<String>>();
        if ( ( queryString == null ) || ( queryString.length() == 0 ) ) {
            return mapOfLists;
        }
        List<NameValuePair> list = URLEncodedUtils.parse( URI.create( "http://localhost/?" + queryString ), "UTF-8" );
        for ( NameValuePair pair : list ) {
            List<String> values = mapOfLists.get( pair.getName() );
            if ( values == null ) {
                values = new ArrayList<String>();
                mapOfLists.put( pair.getName(), values );
            }
            if ( pair.getValue() != null ) {
                values.add( pair.getValue() );
            }
        }

        return mapOfLists;
    }
}