001/*
002 * ====================================================================
003 * Licensed to the Apache Software Foundation (ASF) under one
004 * or more contributor license agreements.  See the NOTICE file
005 * distributed with this work for additional information
006 * regarding copyright ownership.  The ASF licenses this file
007 * to you under the Apache License, Version 2.0 (the
008 * "License"); you may not use this file except in compliance
009 * with the License.  You may obtain a copy of the License at
010 *
011 *   http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing,
014 * software distributed under the License is distributed on an
015 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
016 * KIND, either express or implied.  See the License for the
017 * specific language governing permissions and limitations
018 * under the License.
019 * ====================================================================
020 *
021 * This software consists of voluntary contributions made by many
022 * individuals on behalf of the Apache Software Foundation.  For more
023 * information on the Apache Software Foundation, please see
024 * <http://www.apache.org/>.
025 *
026 */
027
028package org.apache.http.config;
029
030import java.util.HashMap;
031import java.util.Locale;
032import java.util.Map;
033
034import org.apache.http.util.Args;
035
036/**
037 * Builder for {@link Registry} instances.
038 *
039 * @since 4.3
040 */
041public final class RegistryBuilder<I> {
042
043    private final Map<String, I> items;
044
045    public static <I> RegistryBuilder<I> create() {
046        return new RegistryBuilder<I>();
047    }
048
049    RegistryBuilder() {
050        super();
051        this.items = new HashMap<String, I>();
052    }
053
054    public RegistryBuilder<I> register(final String id, final I item) {
055        Args.notEmpty(id, "ID");
056        Args.notNull(item, "Item");
057        items.put(id.toLowerCase(Locale.ROOT), item);
058        return this;
059    }
060
061    public Registry<I> build() {
062        return new Registry<I>(items);
063    }
064
065    @Override
066    public String toString() {
067        return items.toString();
068    }
069
070}