Java tutorial
/* * ==================================================================== * 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. * ==================================================================== * * This software consists of voluntary contributions made by many * individuals on behalf of the Apache Software Foundation. For more * information on the Apache Software Foundation, please see * <http://www.apache.org/>. * */ package org.apache.http.config; import java.util.HashMap; import java.util.Locale; import java.util.Map; import org.apache.http.annotation.NotThreadSafe; import org.apache.http.util.Args; /** * Builder for {@link Registry} instances. * * @since 4.3 */ @NotThreadSafe public final class RegistryBuilder<I> { private final Map<String, I> items; public static <I> RegistryBuilder<I> create() { return new RegistryBuilder<I>(); } RegistryBuilder() { super(); this.items = new HashMap<String, I>(); } public RegistryBuilder<I> register(final String id, final I item) { Args.notEmpty(id, "ID"); Args.notNull(item, "Item"); items.put(id.toLowerCase(Locale.US), item); return this; } public Registry<I> build() { return new Registry<I>(items); } @Override public String toString() { return items.toString(); } }