LogWrapperBase.java

/*
 * Copyright (c) 2003, 2004, 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 org.jboss.com.sun.corba.se.spi.logging;

import java.util.logging.Level;
import java.util.logging.LogRecord;
import java.util.logging.Logger;

public abstract class LogWrapperBase
{
    protected Logger logger;

    protected String loggerName;

    protected LogWrapperBase(Logger logger)
    {
        this.logger = logger;
        this.loggerName = logger.getName();
    }

    protected void doLog(Level level, String key, Object[] params, Class<?> wrapperClass, Throwable thr)
    {
        LogRecord lrec = new LogRecord(level, key);
        if (params != null)
            lrec.setParameters(params);
        inferCaller(wrapperClass, lrec);
        lrec.setThrown(thr);
        lrec.setLoggerName(loggerName);
        lrec.setResourceBundle(logger.getResourceBundle());
        logger.log(lrec);
    }

    private void inferCaller(Class<?> wrapperClass, LogRecord lrec)
    {
        // Private method to infer the caller's class and method names

        // Get the stack trace.
        StackTraceElement stack[] = (new Throwable()).getStackTrace();
        StackTraceElement frame = null;
        String wcname = wrapperClass.getName();
        String baseName = LogWrapperBase.class.getName();

        // The top of the stack should always be a method in the wrapper class,
        // or in this base class.
        // Search back to the first method not in the wrapper class or this class.
        int ix = 0;
        while (ix < stack.length)
        {
            frame = stack[ix];
            String cname = frame.getClassName();
            if (!cname.equals(wcname) && !cname.equals(baseName))
            {
                break;
            }

            ix++;
        }

        // Set the class and method if we are not past the end of the stack
        // trace
        if (ix < stack.length)
        {
            lrec.setSourceClassName(frame.getClassName());
            lrec.setSourceMethodName(frame.getMethodName());
        }
    }

    protected void doLog(Level level, String key, Class<?> wrapperClass, Throwable thr)
    {
        doLog(level, key, null, wrapperClass, thr);
    }
}