com.sun.enterprise.universal.i18n.LocalStringsImpl Maven / Gradle / Ivy
/*
* Copyright (c) 2008, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
/*
* LocalStringsImpl.java
*
* Created on December 3, 2005, 5:26 PM
*
*/
package com.sun.enterprise.universal.i18n;
import java.util.*;
import java.util.ResourceBundle;
import java.text.MessageFormat;
/**
* This class makes getting localized strings super-simple. This is the companion
* class to Strings. Use this class when performance may be an issue. I.e. Strings
* is all-static and creates a ResourceBundle on every call. This class is instantiated
* once and can be used over and over from the same package.
* Specifics:
*
* - Your calling code should have a file named LocalStrings.properties in its
* package directory.
*
- If your localized string has no arguments call get(String) to get the localized
* String value.
*
- If you have a parameterized string, call get(String, Object...)
*
* Note: You can not get an Exception out of calling this code! If the String
* or the properties file does not exist, it will return the String that you gave
* in the first place as the argument.
*
Example:
*
* - LocalStringsImpl sh = new LocalStringsImpl();
*
- String s = sh.get("xyz");
*
- String s = sh.get("xyz", new Date(), 500, "something", 2.00003);
*
- String s = sh.get("xyz", "something", "foo", "whatever");
*
*
* @author bnevins
*/
public class LocalStringsImpl {
/**
* Create a LocalStringsImpl instance.
* Automatically discover the caller's LocalStrings.properties file
*/
public LocalStringsImpl() {
setBundle();
}
/**
* Create a LocalStringsImpl instance.
* use the proffered class object to find LocalStrings.properties.
* This is the constructor to use if you are concerned about getting
* the fastest performance.
*/
public LocalStringsImpl(Class clazz) {
setBundle(clazz);
}
/**
* Create a LocalStringsImpl instance.
* use the proffered String. The String is the FQN of the properties file,
* without the '.properties'. E.g. 'com.elf.something.LogStrings'
*/
public LocalStringsImpl(String packageName, String propsName) {
this.propsName = propsName;
int len = packageName.length();
// side-effect -- make sure it ends in '.'
if (packageName.charAt(len - 1) != '.') {
packageName += '.';
}
setBundle(packageName);
}
/**
* Get a String from the caller's package's LocalStrings.properties
* @param indexString The string index into the localized string file
* @return the String from LocalStrings or the supplied String if it doesn't exist
*/
public String get(String indexString) {
try {
return getBundle().getString(indexString);
}
catch (Exception e) {
// it is not an error to have no key...
return indexString;
}
}
/**
* Get and format a String from the caller's package's LocalStrings.properties
* @param indexString The string index into the localized string file
* @param objects The arguments to give to MessageFormat
* @return the String from LocalStrings or the supplied String if it doesn't exist --
* using the array of supplied Object arguments
*/
public String get(String indexString, Object... objects) {
indexString = get(indexString);
try {
MessageFormat mf = new MessageFormat(indexString);
return mf.format(objects);
}
catch (Exception e) {
return indexString;
}
}
/**
* Get a String from the caller's package's LocalStrings.properties
* @param indexString The string index into the localized string file
* @return the String from LocalStrings or the supplied default value if it doesn't exist
*/
public String getString(String indexString, String defaultValue) {
try {
return getBundle().getString(indexString);
}
catch (Exception e) {
// it is not an error to have no key...
return defaultValue;
}
}
/**
* Get an integer from the caller's package's LocalStrings.properties
* @param indexString The string index into the localized string file
* @return the integer value from LocalStrings or the supplied default if
* it doesn't exist or is bad.
*/
public int getInt(String indexString, int defaultValue) {
try {
String s = getBundle().getString(indexString);
return Integer.parseInt(s);
}
catch (Exception e) {
// it is not an error to have no key...
return defaultValue;
}
}
/**
* Get a boolean from the caller's package's LocalStrings.properties
* @param indexString The string index into the localized string file
* @return the integer value from LocalStrings or the supplied default if
* it doesn't exist or is bad.
*/
public boolean getBoolean(String indexString, boolean defaultValue) {
try {
return Boolean.valueOf(getBundle().getString(indexString));
}
catch (Exception e) {
// it is not an error to have no key...
return defaultValue;
}
}
///////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////
private ResourceBundle getBundle() {
return bundle;
}
///////////////////////////////////////////////////////////////////////////
private void setBundle() {
// go through the stack, top to bottom. The item that is below the LAST
// method that is in the util framework is where the logfile is.
// note that there may be more than one method from util in the stack
// because they may be calling us indirectly from LoggerHelper. Also
// note that this class won't work from any class in the util hierarchy itself.
try {
StackTraceElement[] items = Thread.currentThread().getStackTrace();
int lastMeOnStack = -1;
for (int i = 0; i < items.length; i++) {
StackTraceElement item = items[i];
if (item.getClassName().startsWith(thisPackage)) {
lastMeOnStack = i;
}
}
String className = items[lastMeOnStack + 1].getClassName();
setBundle(className);
}
catch (Exception e) {
bundle = null;
}
}
///////////////////////////////////////////////////////////////////////////
private void setBundle(Class clazz) {
try {
String className = clazz.getName();
setBundle(className);
// April 25, 2009 -- if OSGi is in charge then we might not have got the
// bundle! Fix: send in the class's Classloader...
if(bundle == null) {
String props = className.substring(0, className.lastIndexOf('.')) + "." + propsName;
bundle = ResourceBundle.getBundle(props, Locale.getDefault(), clazz.getClassLoader(),
rbcontrol);
}
}
catch (Exception e) {
bundle = null;
}
}
///////////////////////////////////////////////////////////////////////////
private void setBundle(String className) {
try {
String props = className.substring(0, className.lastIndexOf('.')) + "." + propsName;
bundle = ResourceBundle.getBundle(props, rbcontrol);
}
catch (Exception e) {
bundle = null;
}
}
///////////////////////////////////////////////////////////////////////////
private ResourceBundle bundle;
private String propsName = "LocalStrings";
private static final String thisPackage = "com.elf.util";
private static final ResourceBundle.Control rbcontrol =
ResourceBundle.Control.getControl(ResourceBundle.Control.FORMAT_PROPERTIES);
}
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