    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    }