BEGIN LICENSE BLOCK *****
Version: EPL 2.0/GPL 2.0/LGPL 2.1
The contents of this file are subject to the Eclipse Public
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.eclipse.org/legal/epl-v20.html
Software distributed under the License is distributed on an "AS
IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
implied. See the License for the specific language governing
rights and limitations under the License.
Copyright (C) 2015-2015 The JRuby Community (and contribs)
Alternatively, the contents of this file may be used under the terms of
either of the GNU General Public License Version 2 or later (the "GPL"),
or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
in which case the provisions of the GPL or the LGPL are applicable instead
of those above. If you wish to allow use of your version of this file only
under the terms of either the GPL or the LGPL, and not to allow others to
use your version of this file under the terms of the EPL, indicate your
decision by deleting the provisions above and replace them with the notice
and other provisions required by the GPL or the LGPL. If you do not delete
the provisions above, a recipient may use your version of this file under
the terms of any one of the EPL, the GPL or the LGPL.
END LICENSE BLOCK /***** BEGIN LICENSE BLOCK *****
 * Version: EPL 2.0/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Eclipse Public
 * 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.eclipse.org/legal/epl-v20.html
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * Copyright (C) 2015-2015 The JRuby Community (and contribs)
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the EPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the EPL, the GPL or the LGPL.
 ***** END LICENSE BLOCK *****/

package org.jruby.util.log;

import java.util.logging.Level;

Logger which delegates to Logger. 
Author:
kares/**
 * Logger which delegates to {@link java.util.logging.Logger}.
 *
 * @author kares
 */
public class JULLogger implements Logger {

    private final java.util.logging.Logger logger; // our delegate

    public JULLogger(final String loggerName) {
        this( java.util.logging.Logger.getLogger(loggerName) );
    }

    public JULLogger(final Class<?> loggerClass) {
        this( java.util.logging.Logger.getLogger(loggerClass.getName()) );
    }

    protected JULLogger(final java.util.logging.Logger logger) {
        this.logger = logger;
    }

    public String getName() {
        return logger.getName();
    }

    public void warn(String message, Object... args) {
        log(Level.WARNING, adjustPattern(message), args);
    }

    public void warn(Throwable throwable) {
        log(Level.WARNING, null, throwable);
    }

    public void warn(String message, Throwable throwable) {
        log(Level.WARNING, message, throwable);
    }

    public void error(String message, Object... args) {
        log(Level.SEVERE, adjustPattern(message), args);
    }

    public void error(Throwable throwable) {
        log(Level.SEVERE, null, throwable);
    }

    public void error(String message, Throwable throwable) {
        log(Level.SEVERE, message, throwable);
    }

    public void info(String message, Object... args) {
        if (logger.isLoggable(Level.INFO)) {
            log(Level.INFO, adjustPattern(message), args);
        }
    }

    public void info(Throwable throwable) {
        log(Level.INFO, null, throwable);
    }

    public void info(String message, Throwable throwable) {
        log(Level.INFO, message, throwable);
    }

    public void debug(String message, Object... args) {
        if (logger.isLoggable(Level.FINE)) {
            log(Level.FINE, adjustPattern(message), args);
        }
    }

    public void debug(Throwable throwable) {
        log(Level.FINE, null, throwable);
    }

    public void debug(String message, Throwable throwable) {
        log(Level.FINE, message, throwable);
    }


    protected void log(Level level, String message, Object... args) {
        final String souceClass = null;
        final String souceMethod = null;
        logger.logp(level, souceClass, souceMethod, message, args);
    }

    protected void log(Level level, String message, Throwable ex) {
        final String souceClass = null;
        final String souceMethod = null;
        logger.logp(level, souceClass, souceMethod, message, ex);
    }

    public boolean isDebugEnabled() {
        return logger.isLoggable(Level.FINE);
    }

    public void setDebugEnable(boolean debug) {
        logger.setLevel(debug ? Level.FINE : Level.INFO);
    }

    // adjust {} to JUL conventions e.g. "hello {} {}" -> "hello {0} {1}"
    static String adjustPattern(final String messagePattern) {
        if (messagePattern == null) return null;

        StringBuilder julPattern = null;
        final int len = messagePattern.length(); int last = 0; int counter = 0;
        for ( int i = 0; i < len; i++ ) {
            if ( messagePattern.charAt(i) == '{' &&
                ( i == 0 || (i > 0 && messagePattern.charAt(i - 1) != '\\' ) ) &&
                ( i < len - 1 && messagePattern.charAt(i + 1) == '}' ) ) {
                if (julPattern == null) {
                    julPattern = new StringBuilder(len + 8);
                }
                julPattern.
                    append(messagePattern, last, i).
                    append('{').append(counter++).append('}');
                last = i + 2;
            }
        }

        if (julPattern != null) {
            if (last < len) {
                julPattern.append(messagePattern, last, len);
            }
            return julPattern.toString();
        }

        return messagePattern; // no {} place holders
    }

}