    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
    015package org.apache.tapestry5.commons;
    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 */
    022public 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}