001    // Copyright 2004, 2005 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.hivemind;
016    
017    
018    /**
019     * Represents a location within a resource; this is universally
020     * used to support error reporting, by relating run-time objects
021     * back to specific locations wtihin specific resources.
022     * 
023     * @author Howard M. Lewis Ship, glongman@intelligentworks.com
024     */
025    public interface Location
026    {
027            /**
028             * The resource containing the location.
029             */
030        public Resource getResource();
031        
032        /**
033         * The line within the resource containing the location,
034         * or -1 if the line number is not known.
035         * 
036         */
037        public int getLineNumber();
038        
039        /**
040         * The column number, or -1 if not known.
041         */
042        public int getColumnNumber();
043    }