001 /*
002 * Copyright 2010-2013 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017 package org.codehaus.griffon.runtime.core.i18n;
018
019 import griffon.core.i18n.MessageSource;
020 import griffon.core.i18n.NoSuchMessageException;
021
022 import java.util.List;
023 import java.util.Locale;
024
025 /**
026 * @author Andres Almiray
027 * @since 1.1.0
028 */
029 public class CompositeMessageSource extends AbstractMessageSource {
030 private final MessageSource[] messageSources;
031
032 public CompositeMessageSource(List<MessageSource> messageSources) {
033 this(toMessageSourceArray(messageSources));
034 }
035
036 public CompositeMessageSource(MessageSource[] messageSources) {
037 this.messageSources = messageSources;
038 }
039
040 private static MessageSource[] toMessageSourceArray(List<MessageSource> messageSources) {
041 if (null == messageSources || messageSources.isEmpty()) {
042 return new MessageSource[0];
043 }
044 return messageSources.toArray(new MessageSource[messageSources.size()]);
045 }
046
047 public String getMessage(String key, String defaultMessage) {
048 return getMessageInternal(key, EMPTY_OBJECT_ARGS, defaultMessage, Locale.getDefault());
049 }
050
051 public String getMessage(String key, String defaultMessage, Locale locale) {
052 return getMessageInternal(key, EMPTY_OBJECT_ARGS, defaultMessage, locale);
053 }
054
055 public String getMessage(String key, Object[] args, String defaultMessage) {
056 return getMessageInternal(key, args, defaultMessage, Locale.getDefault());
057 }
058
059 public String getMessage(String key, Object[] args, String defaultMessage, Locale locale) {
060 return getMessageInternal(key, args, defaultMessage, locale);
061 }
062
063 public String getMessage(String key, List args, String defaultMessage) {
064 return getMessageInternal(key, toObjectArray(args), defaultMessage, Locale.getDefault());
065 }
066
067 public String getMessage(String key, List args, String defaultMessage, Locale locale) {
068 return getMessageInternal(key, toObjectArray(args), defaultMessage, locale);
069 }
070
071 public String resolveMessage(String key, Locale locale) {
072 if (null == locale) locale = Locale.getDefault();
073 for (MessageSource messageSource : messageSources) {
074 try {
075 if (messageSource instanceof AbstractMessageSource) {
076 return ((AbstractMessageSource) messageSource).resolveMessage(key, locale);
077 }
078 return messageSource.getMessage(key, locale);
079 } catch (NoSuchMessageException nsme) {
080 // ignore
081 }
082 }
083 throw new NoSuchMessageException(key, locale);
084 }
085
086 private String getMessageInternal(String key, Object[] args, Locale locale) throws NoSuchMessageException {
087 if (null == locale) locale = Locale.getDefault();
088 for (MessageSource messageSource : messageSources) {
089 try {
090 return messageSource.getMessage(key, args, locale);
091 } catch (NoSuchMessageException nsme) {
092 // ignore
093 }
094 }
095 throw new NoSuchMessageException(key, locale);
096 }
097
098 private String getMessageInternal(String key, Object[] args, String defaultMessage, Locale locale) {
099 try {
100 return getMessageInternal(key, args, locale);
101 } catch (NoSuchMessageException nsme) {
102 // ignore
103 }
104 return null == defaultMessage ? key : defaultMessage;
105 }
106 }
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