1 /* 2 * Copyright (C) 2006 Google Inc. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.google.inject.name; 18 19 import com.google.inject.Binder; 20 import com.google.inject.Key; 21 import java.util.Enumeration; 22 import java.util.Map; 23 import java.util.Properties; 24 25 /** 26 * Utility methods for use with {@code @}{@link Named}. 27 * 28 * @author crazybob@google.com (Bob Lee) 29 */ 30 public class Names { 31 Names()32 private Names() {} 33 34 /** Creates a {@link Named} annotation with {@code name} as the value. */ named(String name)35 public static Named named(String name) { 36 return new NamedImpl(name); 37 } 38 39 /** Creates a constant binding to {@code @Named(key)} for each entry in {@code properties}. */ bindProperties(Binder binder, Map<String, String> properties)40 public static void bindProperties(Binder binder, Map<String, String> properties) { 41 binder = binder.skipSources(Names.class); 42 for (Map.Entry<String, String> entry : properties.entrySet()) { 43 String key = entry.getKey(); 44 String value = entry.getValue(); 45 binder.bind(Key.get(String.class, new NamedImpl(key))).toInstance(value); 46 } 47 } 48 49 /** 50 * Creates a constant binding to {@code @Named(key)} for each property. This method binds all 51 * properties including those inherited from {@link Properties#defaults defaults}. 52 */ bindProperties(Binder binder, Properties properties)53 public static void bindProperties(Binder binder, Properties properties) { 54 binder = binder.skipSources(Names.class); 55 56 // use enumeration to include the default properties 57 for (Enumeration<?> e = properties.propertyNames(); e.hasMoreElements(); ) { 58 String propertyName = (String) e.nextElement(); 59 String value = properties.getProperty(propertyName); 60 binder.bind(Key.get(String.class, new NamedImpl(propertyName))).toInstance(value); 61 } 62 } 63 } 64