package ca.uhn.fhir.i18n;
import static org.apache.commons.lang3.StringUtils.isNotBlank;
/*
* #%L
* HAPI FHIR - Core Library
* %%
* Copyright (C) 2014 - 2017 University Health Network
* %%
* Licensed 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.
* #L%
*/
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.ResourceBundle;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
/**
* This feature is not yet in its final state and should be considered an internal part of HAPI for now - use with caution
*/
public class HapiLocalizer {
public static final String UNKNOWN_I18N_KEY_MESSAGE = "!MESSAGE!";
private static final org.slf4j.Logger ourLog = org.slf4j.LoggerFactory.getLogger(HapiLocalizer.class);
private List<ResourceBundle> myBundle = new ArrayList<ResourceBundle>();
private final Map<String, MessageFormat> myKeyToMessageFormat = new ConcurrentHashMap<String, MessageFormat>();
private String[] myBundleNames;
public HapiLocalizer() {
this(HapiLocalizer.class.getPackage().getName() + ".hapi-messages");
}
public HapiLocalizer(String... theBundleNames) {
myBundleNames = theBundleNames;
init();
}
protected void init() {
for (String nextName : myBundleNames) {
myBundle.add(ResourceBundle.getBundle(nextName));
}
}
private String findFormatString(String theQualifiedKey) {
String formatString = null;
for (ResourceBundle nextBundle : myBundle) {
if (nextBundle.containsKey(theQualifiedKey)) {
formatString = nextBundle.getString(theQualifiedKey);
}
if (isNotBlank(formatString)) {
break;
}
}
if (formatString == null) {
ourLog.warn("Unknown localization key: {}", theQualifiedKey);
formatString = UNKNOWN_I18N_KEY_MESSAGE;
}
return formatString;
}
public String getMessage(Class<?> theType, String theKey, Object... theParameters) {
return getMessage(theType.getName() + '.' + theKey, theParameters);
}
public String getMessage(String theQualifiedKey, Object... theParameters) {
if (theParameters != null && theParameters.length > 0) {
MessageFormat format = myKeyToMessageFormat.get(theQualifiedKey);
if (format != null) {
return format.format(theParameters).toString();
}
String formatString = findFormatString(theQualifiedKey);
format = new MessageFormat(formatString.trim());
myKeyToMessageFormat.put(theQualifiedKey, format);
return format.format(theParameters).toString();
}
String retVal = findFormatString(theQualifiedKey);
return retVal;
}
public Set<String> getAllKeys(){
HashSet<String> retVal = new HashSet<String>();
for (ResourceBundle nextBundle : myBundle) {
Enumeration<String> keysEnum = nextBundle.getKeys();
while (keysEnum.hasMoreElements()) {
retVal.add(keysEnum.nextElement());
}
}
return retVal;
}
}