Java/XML/XMLStreamReader
Содержание
Debugging utilities for XmlStreamReader
/* Copyright 2004 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// Revised from xml beans
import javax.xml.stream.XMLStreamReader;
/**
* debugging utilities for XmlStreamReader
*/
public final class XmlStreamUtils {
public static String printEvent(XMLStreamReader xmlr) {
StringBuffer b = new StringBuffer();
b.append("EVENT:[" + xmlr.getLocation().getLineNumber() + "]["
+ xmlr.getLocation().getColumnNumber() + "] ");
b.append(getName(xmlr.getEventType()));
b.append(" [");
switch (xmlr.getEventType()) {
case XMLStreamReader.START_ELEMENT:
b.append("<");
printName(xmlr, b);
for (int i = 0; i < xmlr.getNamespaceCount(); i++) {
b.append(" ");
String n = xmlr.getNamespacePrefix(i);
if ("xmlns".equals(n)) {
b.append("xmlns=\"" + xmlr.getNamespaceURI(i) + "\"");
} else {
b.append("xmlns:" + n);
b.append("=\"");
b.append(xmlr.getNamespaceURI(i));
b.append("\"");
}
}
for (int i = 0; i < xmlr.getAttributeCount(); i++) {
b.append(" ");
printName(xmlr.getAttributePrefix(i), xmlr.getAttributeNamespace(i), xmlr
.getAttributeLocalName(i), b);
b.append("=\"");
b.append(xmlr.getAttributeValue(i));
b.append("\"");
}
b.append(">");
break;
case XMLStreamReader.END_ELEMENT:
b.append("</");
printName(xmlr, b);
for (int i = 0; i < xmlr.getNamespaceCount(); i++) {
b.append(" ");
String n = xmlr.getNamespacePrefix(i);
if ("xmlns".equals(n)) {
b.append("xmlns=\"" + xmlr.getNamespaceURI(i) + "\"");
} else {
b.append("xmlns:" + n);
b.append("=\"");
b.append(xmlr.getNamespaceURI(i));
b.append("\"");
}
}
b.append(">");
break;
case XMLStreamReader.SPACE:
case XMLStreamReader.CHARACTERS:
// b.append(xmlr.getText());
int start = xmlr.getTextStart();
int length = xmlr.getTextLength();
b.append(new String(xmlr.getTextCharacters(), start, length));
break;
case XMLStreamReader.PROCESSING_INSTRUCTION:
String target = xmlr.getPITarget();
if (target == null)
target = "";
String data = xmlr.getPIData();
if (data == null)
data = "";
b.append("<?");
b.append(target + " " + data);
b.append("?>");
break;
case XMLStreamReader.CDATA:
b.append("<![CDATA[");
if (xmlr.hasText())
b.append(xmlr.getText());
b.append("]]>");
break;
case XMLStreamReader.ruMENT:
b.append("<!--");
if (xmlr.hasText())
b.append(xmlr.getText());
b.append("-->");
break;
case XMLStreamReader.ENTITY_REFERENCE:
b.append(xmlr.getLocalName() + "=");
if (xmlr.hasText())
b.append("[" + xmlr.getText() + "]");
break;
case XMLStreamReader.START_DOCUMENT:
b.append("<?xml");
b.append(" version="" + xmlr.getVersion() + """);
b.append(" encoding="" + xmlr.getCharacterEncodingScheme() + """);
if (xmlr.isStandalone())
b.append(" standalone="yes"");
else
b.append(" standalone="no"");
b.append("?>");
break;
}
b.append("]");
return b.toString();
}
private static void printName(String prefix, String uri, String localName, StringBuffer b) {
if (uri != null && !("".equals(uri)))
b.append("["" + uri + ""]:");
if (prefix != null && !("".equals(prefix)))
b.append(prefix + ":");
if (localName != null)
b.append(localName);
}
private static void printName(XMLStreamReader xmlr, StringBuffer b) {
if (xmlr.hasName()) {
String prefix = xmlr.getPrefix();
String uri = xmlr.getNamespaceURI();
String localName = xmlr.getLocalName();
printName(prefix, uri, localName, b);
}
}
public static String getName(int eventType) {
switch (eventType) {
case XMLStreamReader.START_ELEMENT:
return "START_ELEMENT";
case XMLStreamReader.END_ELEMENT:
return "END_ELEMENT";
case XMLStreamReader.PROCESSING_INSTRUCTION:
return "PROCESSING_INSTRUCTION";
case XMLStreamReader.CHARACTERS:
return "CHARACTERS";
case XMLStreamReader.SPACE:
return "SPACE";
case XMLStreamReader.ruMENT:
return "COMMENT";
case XMLStreamReader.START_DOCUMENT:
return "START_DOCUMENT";
case XMLStreamReader.END_DOCUMENT:
return "END_DOCUMENT";
case XMLStreamReader.ENTITY_REFERENCE:
return "ENTITY_REFERENCE";
case XMLStreamReader.ATTRIBUTE:
return "ATTRIBUTE";
case XMLStreamReader.DTD:
return "DTD";
case XMLStreamReader.CDATA:
return "CDATA";
case XMLStreamReader.NAMESPACE:
return "NAMESPACE";
}
return "UNKNOWN_EVENT_TYPE";
}
public static int getType(String val) {
if (val.equals("START_ELEMENT"))
return XMLStreamReader.START_ELEMENT;
if (val.equals("SPACE"))
return XMLStreamReader.SPACE;
if (val.equals("END_ELEMENT"))
return XMLStreamReader.END_ELEMENT;
if (val.equals("PROCESSING_INSTRUCTION"))
return XMLStreamReader.PROCESSING_INSTRUCTION;
if (val.equals("CHARACTERS"))
return XMLStreamReader.CHARACTERS;
if (val.equals("COMMENT"))
return XMLStreamReader.ruMENT;
if (val.equals("START_DOCUMENT"))
return XMLStreamReader.START_DOCUMENT;
if (val.equals("END_DOCUMENT"))
return XMLStreamReader.END_DOCUMENT;
if (val.equals("ATTRIBUTE"))
return XMLStreamReader.ATTRIBUTE;
if (val.equals("DTD"))
return XMLStreamReader.DTD;
if (val.equals("CDATA"))
return XMLStreamReader.CDATA;
if (val.equals("NAMESPACE"))
return XMLStreamReader.NAMESPACE;
return -1;
}
}
Event count
import java.io.File;
import java.io.FileInputStream;
import javax.xml.stream.EventFilter;
import javax.xml.stream.StreamFilter;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.events.XMLEvent;
public class MainClass {
public static void main(String[] args) throws Exception {
XMLInputFactory inputFactory = XMLInputFactory.newInstance();
XMLStreamReader reader = inputFactory.createXMLStreamReader(new FileInputStream(new File("test.xml")));
System.out.println(countEvents(reader));
reader = inputFactory.createXMLStreamReader(new FileInputStream(new File("test.xml")));
StreamFilter filter = new ElementOnlyFilter();
reader = inputFactory.createFilteredReader(reader, filter);
System.out.println(countEvents(reader));
}
private static int countEvents(XMLStreamReader reader) throws XMLStreamException {
int counter = 1;
while (reader.hasNext()) {
reader.next();
counter++;
}
return counter;
}
}
class ElementOnlyFilter implements EventFilter, StreamFilter {
public boolean accept(XMLEvent event) {
return accept(event.getEventType());
}
public boolean accept(XMLStreamReader reader) {
return accept(reader.getEventType());
}
private boolean accept(int eventType) {
return eventType == XMLStreamConstants.START_ELEMENT
|| eventType == XMLStreamConstants.END_ELEMENT;
}
}
Get event type from XMLStreamReader
import java.io.File;
import java.io.FileInputStream;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamReader;
public class MainClass {
public static void main(String[] args) throws Exception {
File file = new File("test.xml");
XMLInputFactory inputFactory = XMLInputFactory.newInstance();
XMLStreamReader reader = inputFactory.createXMLStreamReader(new FileInputStream(file));
while (reader.getEventType() == 6)
reader.next();
int eventTypeID = reader.next();
System.out.println("Hello " + reader.getText());
}
}
Get next from XMLStreamReader
import java.io.File;
import java.io.FileInputStream;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamReader;
public class MainClass {
public static void main(String[] args) throws Exception {
File file = new File("test.xml");
XMLInputFactory inputFactory = XMLInputFactory.newInstance();
XMLStreamReader reader = inputFactory.createXMLStreamReader(new FileInputStream(file));
while (reader.getEventType() == 6)
reader.next();
int eventTypeID = reader.next();
System.out.println("Hello " + reader.getText());
}
}
Get next tag from XMLStreamReader
import java.io.File;
import java.io.FileInputStream;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamReader;
public class MainClass {
public static void main(String[] args) throws Exception {
File file = new File("text.xml");
XMLInputFactory inputFactory = XMLInputFactory.newInstance();
XMLStreamReader reader = inputFactory.createXMLStreamReader(new FileInputStream(file));
int eventTypeID = reader.nextTag();
eventTypeID = reader.nextTag();
eventTypeID = reader.next();
System.out.println("Hello " + reader.getText());
}
}
Read Xml from StreamSource
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
import java.io.IOException;
import java.io.StringReader;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.stream.StreamSource;
import org.w3c.dom.Document;
import org.xml.sax.EntityResolver;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
/**
* Few simple utils to read DOM. This is originally from the Jakarta Commons
* Modeler.
*
* @author Costin Manolache
*/
public class Utils {
public static Document readXml(StreamSource is) throws SAXException, IOException,
ParserConfigurationException {
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setValidating(false);
dbf.setIgnoringComments(false);
dbf.setIgnoringElementContentWhitespace(true);
dbf.setNamespaceAware(true);
// dbf.setCoalescing(true);
// dbf.setExpandEntityReferences(true);
DocumentBuilder db = null;
db = dbf.newDocumentBuilder();
db.setEntityResolver(new NullResolver());
// db.setErrorHandler( new MyErrorHandler());
InputSource is2 = new InputSource();
is2.setSystemId(is.getSystemId());
is2.setByteStream(is.getInputStream());
is2.setCharacterStream(is.getReader());
return db.parse(is2);
}
}
class NullResolver implements EntityResolver {
public InputSource resolveEntity(String publicId, String systemId) throws SAXException,
IOException {
return new InputSource(new StringReader(""));
}
}
XML stream transform
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can obtain
* a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
* or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath" exception
* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the License
* Header, with the fields enclosed by brackets [] replaced by your own
* identifying information: "Portions Copyrighted [year]
* [name of copyright owner]"
*
* Contributor(s):
*
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don"t indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.InputStream;
import java.io.OutputStream;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLOutputFactory;
/**
* Padmaja Vedula
*/
public class StreamSrcStAXRst {
static String fileName;
public static void main(String[] args) {
if (args.length != 3) {
System.out.println("Usage: java " + StreamSrcStAXRst.class.getName()
+ " <XML that needs to be transformed>" + " <XSLT file>" + " <Output file>");
System.exit(1);
}
try {
transform(args);
} catch (Exception e) {
e.printStackTrace();
System.exit(1);
}
}
private static void transform(String[] args) throws Exception {
fileName = args[2].toString();
FileInputStream xmlIn = new FileInputStream(args[0]);
FileInputStream xsltIn = new FileInputStream(args[1]);
FileOutputStream out = new FileOutputStream(args[2]);
transform(xmlIn, xsltIn, out);
}
public static void transform(InputStream xmlIn, InputStream xsltIn, OutputStream out)
throws Exception {
javax.xml.transform.Source xmlSource = new javax.xml.transform.stream.StreamSource(xmlIn);
javax.xml.transform.Result xmlResult = new javax.xml.transform.stax.StAXResult(XMLOutputFactory
.newInstance().createXMLStreamWriter(new FileWriter(fileName)));
javax.xml.transform.Source xsltSource = new javax.xml.transform.stream.StreamSource(xsltIn);
javax.xml.transform.Source source = new javax.xml.transform.stream.StreamSource(xmlIn);
// create an instance of TransformerFactory
javax.xml.transform.TransformerFactory transFact = javax.xml.transform.TransformerFactory
.newInstance();
transFact.setAttribute("debug", new String("true"));
transFact.setAttribute("translet-name", new String("suresh"));
transFact.setAttribute("generate-translet", new String("true"));
transFact.setAttribute("jar-name", new String("transletjar"));
javax.xml.transform.Transformer trans = transFact.newTransformer(xsltSource);
trans.transform(source, xmlResult);
}
private static XMLEventReader getXMLEventReader(String filename) {
XMLInputFactory xmlif = null;
XMLEventReader xmlr = null;
try {
xmlif = XMLInputFactory.newInstance();
xmlif.setProperty(XMLInputFactory.IS_REPLACING_ENTITY_REFERENCES, Boolean.TRUE);
xmlif.setProperty(XMLInputFactory.IS_SUPPORTING_EXTERNAL_ENTITIES, Boolean.FALSE);
xmlif.setProperty(XMLInputFactory.IS_NAMESPACE_AWARE, Boolean.TRUE);
xmlif.setProperty(XMLInputFactory.IS_COALESCING, Boolean.TRUE);
FileInputStream fis = new FileInputStream(filename);
xmlr = xmlif.createXMLEventReader(filename, fis);
} catch (Exception ex) {
ex.printStackTrace();
}
return xmlr;
}
}
