001/*
002 * This file is part of the Keycloak Moodle authenticator
003 * Copyright (C) 2024 Michael N. Lipp
004 *
005 * This program is free software; you can redistribute it and/or modify it 
006 * under the terms of the GNU Lesser General Public License as published
007 * by the Free Software Foundation; either version 3 of the License, or 
008 * (at your option) any later version.
009 *
010 * This program is distributed in the hope that it will be useful, but 
011 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
012 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 
013 * License for more details.
014 *
015 * You should have received a copy of the GNU Lesser General Public License along 
016 * with this program; if not, see <http://www.gnu.org/licenses/>.
017 */
018
019package org.jdrupes.keycloak.moodleauth.moodle.service;
020
021import java.net.URLEncoder;
022import java.nio.charset.Charset;
023import java.util.Collection;
024import java.util.stream.Collectors;
025
026/**
027 * Wraps a collection to enforce non-standard encoding in a query.  
028 */
029public class CommaSeparatedValues implements QueryValueEncoder {
030
031    private final Collection<?> values;
032
033    /**
034     * Instantiates a new object.
035     *
036     * @param values the values
037     */
038    public CommaSeparatedValues(Collection<?> values) {
039        this.values = values;
040    }
041
042    /**
043     * Returns the string to use as value in a query. 
044     *
045     * @return the string
046     */
047    public String asQueryValue() {
048        return values.stream()
049            .map(v -> URLEncoder.encode(v.toString(), Charset.forName("utf-8")))
050            .collect(Collectors.joining(","));
051    }
052
053}