6574134: Allow for alternative implementation of Name Table with garbage collection of name bytes
Reviewed-by: darcy, mcimadamore
/*
* Copyright 2005 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
package com.sun.tools.javac.util;
import java.util.ResourceBundle;
import java.util.MissingResourceException;
import java.text.MessageFormat;
/**
* Support for localized messages.
*
* <p><b>This is NOT part of any API supported by Sun Microsystems. If
* you write code that depends on this, you do so at your own risk.
* This code and its internal interfaces are subject to change or
* deletion without notice.</b>
*/
public class Messages {
/** The context key for the Messages object. */
protected static final Context.Key<Messages> messagesKey =
new Context.Key<Messages>();
/** Get the Messages instance for this context. */
public static Messages instance(Context context) {
Messages instance = context.get(messagesKey);
if (instance == null)
instance = new Messages(context);
return instance;
}
private List<ResourceBundle> bundles = List.nil();
/** Creates a Messages object.
*/
public Messages(Context context) {
context.put(messagesKey, this);
add(getDefaultBundle());
}
/** Creates a Messages object.
* @param bundle the name to identify the resource buundle of localized messages.
*/
public Messages(String bundleName) throws MissingResourceException {
add(bundleName);
}
/** Creates a Messages object.
* @param bundle the name to identif the resource buundle of localized messages.
*/
public Messages(ResourceBundle bundle) throws MissingResourceException {
add(bundle);
}
/** Add a new resource bundle to the list that is searched for localized messages.
* @param bundle the name to identify the resource bundle of localized messages.
*/
public void add(String bundleName) throws MissingResourceException {
add(ResourceBundle.getBundle(bundleName));
}
/** Add a new resource bundle to the list that is searched for localized messages.
* Resource bundles will be searched in reverse order in which they are added.
* @param bundle the bundle of localized messages.
*/
public void add(ResourceBundle bundle) {
bundles = bundles.prepend(bundle);
}
/** Gets the localized string corresponding to a key, formatted with a set of args.
*/
public String getLocalizedString(String key, Object... args) {
return getLocalizedString(bundles, key, args);
}
/* Static access:
* javac has a firmly entrenched notion of a default message bundle
* which it can access from any static context. This is used to get
* easy access to simple localized strings.
*/
private static final String defaultBundleName =
"com.sun.tools.javac.resources.compiler";
private static ResourceBundle defaultBundle;
private static Messages defaultMessages;
/**
* Gets a localized string from the compiler's default bundle.
*/
// used to support legacy Log.getLocalizedString
static String getDefaultLocalizedString(String key, Object... args) {
return getLocalizedString(List.of(getDefaultBundle()), key, args);
}
// used to support legacy static Diagnostic.fragment
static Messages getDefaultMessages() {
if (defaultMessages == null)
defaultMessages = new Messages(getDefaultBundle());
return defaultMessages;
}
public static ResourceBundle getDefaultBundle() {
try {
if (defaultBundle == null)
defaultBundle = ResourceBundle.getBundle(defaultBundleName);
return defaultBundle;
}
catch (MissingResourceException e) {
throw new Error("Fatal: Resource for compiler is missing", e);
}
}
private static String getLocalizedString(List<ResourceBundle> bundles,
String key,
Object... args) {
String msg = null;
for (List<ResourceBundle> l = bundles; l.nonEmpty() && msg == null; l = l.tail) {
ResourceBundle rb = l.head;
try {
msg = rb.getString(key);
}
catch (MissingResourceException e) {
// ignore, try other bundles in list
}
}
if (msg == null) {
msg = "compiler message file broken: key=" + key +
" arguments={0}, {1}, {2}, {3}, {4}, {5}, {6}, {7}";
}
return MessageFormat.format(msg, args);
}
}