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/*
 *
 *  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 flex2.tools.oem;

/**
 * The Message interface lets you discover
 * the following information about a compiler message.
 * 
 *  * 1. getLevel()    - Error level: error, warning or info.
 * 2. getPath()     - Location.
 * 3. getLine()     - Line number.
 * 4. getColumn()   - Column number.
 * 5. toString()    - Message string.
 * 
 *
 * The Message.toString() method returns the message text.
 * 
 * @version 2.0.1
 * @author Clement Wong
 */
public interface Message
{
    /**
     * Indicates that the severity of this Message is "error".
     */
    String ERROR = "error";
    
    /**
     * Indicates that the severity of this Message is "warning".
     */
    String WARNING = "warning";
    
    /**
     * Indicates that the severity of this Message is "info".
     */
    String INFO = "info";
    
    /**
     * Returns the compiler message severity level.
     * 
     * @return One of Message.ERROR, Message.WARNING, or Message.INFO.
     * @see #ERROR
     * @see #WARNING
     * @see #INFO
     */
    String getLevel();

    /**
     * Returns the location of the file that contains the error.
     * 
     * @return String; null if the path is not applicable.
     */
    String getPath();
    
    /**
     * Returns the line number of the file that contains the error.
     * 
     * @return An integer; -1 if the line number is not applicable.
     */
    int getLine();
    
    /**
     * Returns the column number of the file that contains the error.
     * 
     * @return An integer; -1 if the column number is not applicable.
     */
    int getColumn();
    
    /**
     * Returns the message.
     * 
     * @return A string.
     */
    String toString();
}