001    // Copyright 2006 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.tapestry5.ioc;
016    
017    /**
018     * A kind of tag applied to other objects to identify where they came from, in terms of a file (the resource), a line
019     * number, and a column number. This is part of "line precise exception reporting", whereby errors at runtime can be
020     * tracked backwards to the files from which they were parsed or otherwise constructed.
021     */
022    public interface Location
023    {
024        /**
025         * The resource from which the object tagged with a location was derived.
026         */
027        Resource getResource();
028    
029        /**
030         * The line number within the resource, if known, or -1 otherwise.
031         */
032        int getLine();
033    
034        /**
035         * The column number within the line if known, or -1 otherwise.
036         */
037        int getColumn();
038    }