src/share/classes/sun/tools/jconsole/Resources.java

/*
 * Copyright (c) 2004, 2007, Oracle and/or its affiliates. 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.  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).
 *
 * 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 */

package sun.tools.jconsole;

import java.text.MessageFormat;
import java.util.MissingResourceException;
import java.util.ResourceBundle;

import sun.tools.jconsole.resources.JConsoleResources;

/**
 * Provides resource support for jconsole.
 */
public final class Resources {

    private static final Object lock = new Object();
    private static JConsoleResources resources = null;
    static {
        try {
            resources =
                (JConsoleResources)ResourceBundle.getBundle("sun.tools.jconsole.resources.JConsoleResources");
        } catch (MissingResourceException e) {
            // gracefully handle this later
        }
    }

    private Resources() { throw new AssertionError(); }

    /**
     * Returns the text of the jconsole resource for the specified key
     * formatted with the specified arguments.
     *
     */
    public static String getText(String key, Object... args) {
        String format = getString(key);
        if (format == null) {
            format = "missing resource key: key = \"" + key + "\", " +
                "arguments = \"{0}\", \"{1}\", \"{2}\"";
        }
        return formatMessage(format, args);
    }

    static String formatMessage(String format, Object... args) {
        String ss = null;
        synchronized (lock) {
            /*
             * External synchronization required for safe use of
             * java.text.MessageFormat:
             */
            ss = MessageFormat.format(format, args);
        }
        return ss;
    }

    /**
     * Returns the mnemonic keycode int of the jconsole resource for the specified key.
     *
     */
    public static int getMnemonicInt(String key) {
        int mnemonic = 0;
        if (resources != null) {
            Object obj = resources.getObject(key+".mnemonic");
            if (obj instanceof Character) {
                mnemonic = (int)(Character)obj;
                if (mnemonic >= 'a' && mnemonic <='z') {
                    mnemonic -= ('a' - 'A');
                }
            } else if (obj instanceof Integer) {
                mnemonic = (Integer)obj;
            }
        }
        return mnemonic;
    }

    /**
     * Returns the jconsole resource string for the specified key.
     *
     */
    private static String getString(String key) {
        if (resources != null) {
            try {
                return resources.getString(key);
            } catch (MissingResourceException e) {
                return null;
            }
        }
        return "missing resource bundle: key = \"" + key + "\", " +
            "arguments = \"{0}\", \"{1}\", \"{2}\"";
    }
}