src/java.base/share/classes/sun/security/util/ResourcesMgr.java

/*
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 * 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.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle 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).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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package sun.security.util;

import java.util.Map;
import java.util.ResourceBundle;
import java.util.concurrent.ConcurrentHashMap;
import jdk.internal.misc.VM;

/**
 */
public class ResourcesMgr {
    // intended for java.security, javax.security and sun.security resources
    private static final Map<String, ResourceBundle> bundles = new ConcurrentHashMap<>();

    public static String getString(String s) {
        return getBundle("sun.security.util.resources.security").getString(s);
    }

    public static String getAuthResourceString(String s) {
        return getBundle("sun.security.util.resources.auth").getString(s);
    }

    private static ResourceBundle getBundle(String bundleName) {
        if (!VM.isBooted()) {
            // don't expect this be called before the system is fully initialized.
            // This triggers loading of any resource bundle that should be
            // done during initialization of system class loader.
            throw new InternalError("Expected to use ResourceBundle only after booted");
        }
        return bundles.computeIfAbsent(bundleName, ResourceBundle::getBundle);
    }

}