/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.sun.star.filter.config.tools.utils;

//_______________________________________________
// imports

import java.lang.*;
import java.util.*;

//_______________________________________________
// definition

/** can be used to print out some debug messages
 *  and group it into warnings/errors or info statements.
 *
 *
 */
public class Logger
{
    //___________________________________________
    // const

    /** only error message will be shown. */
    public static final int LEVEL_ERRORS = 1;

    /** only errors and warnings will be shown. */
    public static final int LEVEL_WARNINGS = 2;

    /** enable errors/warnings and some global info
     *  message. */
    public static final int LEVEL_GLOBALINFOS = 3;

    /** enable anything! */
    public static final int LEVEL_DETAILEDINFOS = 4;

    //___________________________________________
    // member

    /** enable/disable different output level.
     *  e.g. warnings/errors/infos */
    private int m_nLevel;

    //___________________________________________
    // ctor

    /** initialize new debug object with the specified
     *  debug level.
     *
     *  @param  nLevel
     *          the new debug level.
     *          See const values LEVEL_xxx too.
     */
    public Logger(int nLevel)
    {
        m_nLevel = nLevel;
    }

    //___________________________________________
    // interface

    /** initialize new debug object with a default
     *  debug level.
     */
    public Logger()
    {
        m_nLevel = LEVEL_DETAILEDINFOS;
    }

    //___________________________________________
    // interface

    /** prints out an exception ... if the right level is set.
     *
     *  @param  ex
     *          the exception object
     */
    public synchronized void setException(java.lang.Throwable ex)
    {
        if (m_nLevel >= LEVEL_ERRORS)
        {
            System.err.println("Exception:\n");
            ex.printStackTrace();
        }
    }

    //___________________________________________
    // interface

    /** prints out an error ... if the right level is set.
     *
     *  @param  sError
     *          the error message.
     */
    public synchronized void setError(java.lang.String sError)
    {
        if (m_nLevel >= LEVEL_ERRORS)
            System.err.println("Error    :\t\""+sError+"\"");
    }

    //___________________________________________
    // interface

    /** prints out a warning ... if the right level is set.
     *
     *  @param  sWarning
     *          the warning message.
     */
    public synchronized void setWarning(java.lang.String sWarning)
    {
        if (m_nLevel >= LEVEL_WARNINGS)
            System.err.println("Warning  :\t\""+sWarning+"\"");
    }

    //___________________________________________
    // interface

    /** prints out a global info message ... if the right level is set.
     *
     *  Global infos should be used to describe a complex operation.
     *  E.g.: loading of a document.
     *  But not for every sub operation like e.g. analyzing lines
     *  during loading the document!
     *
     *  @param  sInfo
     *          the info message.
     */
    public synchronized void setGlobalInfo(java.lang.String sInfo)
    {
        if (m_nLevel >= LEVEL_GLOBALINFOS)
            System.out.println("Info     :\t\""+sInfo+"\"");
    }

    //___________________________________________
    // interface

    /** prints out a mode detailed info message ... if the right level is set.
     *
     *  Such detailed message are e.g. "analyze line [n] of file ...".
     *
     *  @param  sInfo
     *          the info message.
     */
    public synchronized void setDetailedInfo(java.lang.String sInfo)
    {
        if (m_nLevel >= LEVEL_DETAILEDINFOS)
            System.out.println("Detail   :\t\""+sInfo+"\"");
    }
}