com.google.gwt.logging.client.FirebugLogHandler.java Source code

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Here is the source code for com.google.gwt.logging.client.FirebugLogHandler.java

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/*
 * Copyright 2010 Google Inc.
 * 
 * Licensed under the Apache 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.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package com.google.gwt.logging.client;

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

/**
 * A Handler that prints logs to window.console which is used by Firebug.
 * Note we are consciously using 'window' rather than '$wnd' to avoid issues
 * similar to http://code.google.com/p/fbug/issues/detail?id=2914
 */
public class FirebugLogHandler extends Handler {

    public FirebugLogHandler() {
        setFormatter(new TextLogFormatter(true));
        setLevel(Level.ALL);
    }

    @Override
    public void close() {
        // No action needed
    }

    @Override
    public void flush() {
        // No action needed
    }

    @Override
    public void publish(LogRecord record) {
        if (!isSupported() || !isLoggable(record)) {
            return;
        }
        String msg = getFormatter().format(record);
        int val = record.getLevel().intValue();
        if (val <= Level.FINE.intValue()) {
            debug(msg);
        } else if (val < Level.WARNING.intValue()) {
            info(msg);
        } else if (val < Level.SEVERE.intValue()) {
            warn(msg);
        } else {
            error(msg);
        }
    }

    private native void debug(String message) /*-{
                                              window.console.debug(message);
                                              }-*/;

    private native void error(String message) /*-{
                                              window.console.error(message);
                                              }-*/;

    private native void info(String message) /*-{
                                             window.console.info(message);
                                             }-*/;

    private native boolean isSupported() /*-{
                                         return !!(window.console && window.console.firebug);
                                         }-*/;

    private native void warn(String message) /*-{
                                             window.console.warn(message);
                                             }-*/;

}