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/* * Copyright (c) 2000, 2005, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ // SAX locator interface for document events. // http://www.saxproject.org // No warranty; no copyright -- use this as you will. // $Id: Locator.java,v 1.2 2004/11/03 22:55:32 jsuttor Exp $ package org.xml.sax; /** * Interface for associating a SAX event with a document location. * * <blockquote> * <em>This module, both source code and documentation, is in the * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em> * See <a href='http://www.saxproject.org'>http://www.saxproject.org</a> * for further information. * </blockquote> * * <p>If a SAX parser provides location information to the SAX * application, it does so by implementing this interface and then * passing an instance to the application using the content * handler's {@link org.xml.sax.ContentHandler#setDocumentLocator * setDocumentLocator} method. The application can use the * object to obtain the location of any other SAX event * in the XML source document.</p> * * <p>Note that the results returned by the object will be valid only * during the scope of each callback method: the application * will receive unpredictable results if it attempts to use the * locator at any other time, or after parsing completes.</p> * * <p>SAX parsers are not required to supply a locator, but they are * very strongly encouraged to do so. If the parser supplies a * locator, it must do so before reporting any other document events. * If no locator has been set by the time the application receives * the {@link org.xml.sax.ContentHandler#startDocument startDocument} * event, the application should assume that a locator is not * available.</p> * * @since 1.4, SAX 1.0 * @author David Megginson * @see org.xml.sax.ContentHandler#setDocumentLocator */ public interface Locator { /** * Return the public identifier for the current document event. * * <p>The return value is the public identifier of the document * entity or of the external parsed entity in which the markup * triggering the event appears.</p> * * @return A string containing the public identifier, or * null if none is available. * @see #getSystemId */ public abstract String getPublicId(); /** * Return the system identifier for the current document event. * * <p>The return value is the system identifier of the document * entity or of the external parsed entity in which the markup * triggering the event appears.</p> * * <p>If the system identifier is a URL, the parser must resolve it * fully before passing it to the application. For example, a file * name must always be provided as a <em>file:...</em> URL, and other * kinds of relative URI are also resolved against their bases.</p> * * @return A string containing the system identifier, or null * if none is available. * @see #getPublicId */ public abstract String getSystemId(); /** * Return the line number where the current document event ends. * Lines are delimited by line ends, which are defined in * the XML specification. * * <p><strong>Warning:</strong> The return value from the method * is intended only as an approximation for the sake of diagnostics; * it is not intended to provide sufficient information * to edit the character content of the original XML document. * In some cases, these "line" numbers match what would be displayed * as columns, and in others they may not match the source text * due to internal entity expansion. </p> * * <p>The return value is an approximation of the line number * in the document entity or external parsed entity where the * markup triggering the event appears.</p> * * <p>If possible, the SAX driver should provide the line position * of the first character after the text associated with the document * event. The first line is line 1.</p> * * @return The line number, or -1 if none is available. * @see #getColumnNumber */ public abstract int getLineNumber(); /** * Return the column number where the current document event ends. * This is one-based number of Java <code>char</code> values since * the last line end. * * <p><strong>Warning:</strong> The return value from the method * is intended only as an approximation for the sake of diagnostics; * it is not intended to provide sufficient information * to edit the character content of the original XML document. * For example, when lines contain combining character sequences, wide * characters, surrogate pairs, or bi-directional text, the value may * not correspond to the column in a text editor's display. </p> * * <p>The return value is an approximation of the column number * in the document entity or external parsed entity where the * markup triggering the event appears.</p> * * <p>If possible, the SAX driver should provide the line position * of the first character after the text associated with the document * event. The first column in each line is column 1.</p> * * @return The column number, or -1 if none is available. * @see #getLineNumber */ public abstract int getColumnNumber(); } // end of Locator.java