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Java example source code file (SAX2StAXBaseWriter.java)

This example Java source code file (SAX2StAXBaseWriter.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

attributes, cdatabuffer, defaulthandler, error, fatal, lexicalhandler, locator, sax, sax2staxbasewriter, saxexception, saxlocation, string, stringbuffer, util, vector, warning

The SAX2StAXBaseWriter.java Java example source code

/*
 * Copyright (c) 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.
 */

package com.sun.org.apache.xalan.internal.xsltc.trax;

import java.util.Vector;

import javax.xml.stream.Location;
import javax.xml.stream.XMLReporter;
import javax.xml.stream.XMLStreamException;

import org.xml.sax.Attributes;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.ext.LexicalHandler;
import org.xml.sax.helpers.DefaultHandler;


public abstract class SAX2StAXBaseWriter extends DefaultHandler
                implements
                        LexicalHandler {


        protected boolean isCDATA;

        protected StringBuffer CDATABuffer;

        protected Vector namespaces;

        protected Locator docLocator;

        protected XMLReporter reporter;

        public SAX2StAXBaseWriter() {
        }

        public SAX2StAXBaseWriter(XMLReporter reporter) {
                this.reporter = reporter;
        }

        public void setXMLReporter(XMLReporter reporter) {
                this.reporter = reporter;
        }

        public void setDocumentLocator(Locator locator) {
                this.docLocator = locator;
        }


        public Location getCurrentLocation() {
                if (docLocator != null) {
                        return new SAXLocation(docLocator);
                } else {
                        return null;
                }

        }

        public void error(SAXParseException e) throws SAXException {
                reportException("ERROR", e);
        }

        public void fatalError(SAXParseException e) throws SAXException {
                reportException("FATAL", e);
        }

        public void warning(SAXParseException e) throws SAXException {
                reportException("WARNING", e);
        }

        public void startDocument() throws SAXException {
                    namespaces = new Vector(2);
        }

        public void endDocument() throws SAXException {
                namespaces = null;
        }

        public void startElement(String uri, String localName, String qName,
                        Attributes attributes) throws SAXException {
                        namespaces = null;
        }

        public void endElement(String uri, String localName, String qName)
                        throws SAXException {
                namespaces = null;
        }

        public void startPrefixMapping(String prefix, String uri)
                        throws SAXException {

                if (prefix == null) {
                        prefix = "";
                } else if (prefix.equals("xml")) {
                        return;
                }

                if (namespaces == null) {
                    namespaces = new Vector(2);
                }
                namespaces.addElement(prefix);
                namespaces.addElement(uri);
        }


        public void endPrefixMapping(String prefix) throws SAXException {
        }

        public void startCDATA() throws SAXException {
                isCDATA = true;
                if (CDATABuffer == null) {
                        CDATABuffer = new StringBuffer();
                } else {
                        CDATABuffer.setLength(0);
                }
        }

        public void characters(char[] ch, int start, int length)
                        throws SAXException {
                if (isCDATA) {
                        CDATABuffer.append(ch, start, length);
                }
        }

        public void endCDATA() throws SAXException {
                isCDATA = false;
                CDATABuffer.setLength(0);
        }

        public void comment(char[] ch, int start, int length) throws SAXException {
        }

        public void endDTD() throws SAXException {
        }

        public void endEntity(String name) throws SAXException {
        }

        public void startDTD(String name, String publicId, String systemId)
                        throws SAXException {
        }

        public void startEntity(String name) throws SAXException {
        }

        /**
         * Used to report a {@link SAXException}to the {@link XMLReporter}
         * registered with this handler.
         */
        protected void reportException(String type, SAXException e)
                        throws SAXException {

                if (reporter != null) {
                        try {
                                reporter.report(e.getMessage(), type, e, getCurrentLocation());
                        } catch (XMLStreamException e1) {
                                throw new SAXException(e1);
                        }
                }
        }

        /**
         * Parses an XML qualified name, and places the resulting prefix and local
         * name in the provided String array.
         *
         * @param qName The qualified name to parse.
         * @param results An array where parse results will be placed. The prefix
         *            will be placed at <code>results[0], and the local
         *            part at <code>results[1]
         */
        public static final void parseQName(String qName, String[] results) {

                String prefix, local;
                int idx = qName.indexOf(':');
                if (idx >= 0) {
                        prefix = qName.substring(0, idx);
                        local = qName.substring(idx + 1);
                } else {
                        prefix = "";
                        local = qName;
                }
                results[0] = prefix;
                results[1] = local;
        }

        /**
         * {@Link Location}implementation used to expose details from a SAX
         * {@link Locator}.
         *
         * @author christian
         */
        private static final class SAXLocation implements Location {

                private int lineNumber;
                private int columnNumber;
                private String publicId;
                private String systemId;
                private SAXLocation(Locator locator) {
                        lineNumber = locator.getLineNumber();
                        columnNumber = locator.getColumnNumber();
                        publicId = locator.getPublicId();
                        systemId = locator.getSystemId();
                }

                public int getLineNumber() {
                        return lineNumber;
                }

                public int getColumnNumber() {
                        return columnNumber;
                }

                public int getCharacterOffset() {
                        return -1;
                }

                public String getPublicId() {
                        return publicId;
                }

                public String getSystemId() {
                        return systemId;
                }
        }
}

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