Презентация на тему Delivering Excellence in Software Engineering

org.apache.xerces.parsers.SAXParser( );

// Старт парсинг
reader.parse(uri);
XMLReader reader =

XMLReaderFactory.createXMLReader( );

Выбор другого вендора
java -Dorg.xml.sax.driver=org.apache.xerces.parsers.SAXParser

this for later use
this.locator = locator;
}
public

void startDocument( ) throws SAXException {
// No visual events occur here
}

public void endDocument( ) throws SAXException {
// No visual events occur here
}

/>

public void startPrefixMapping(String prefix, String uri) {
// No visual events occur here.
namespaceMappings.put(uri, prefix);
}
public void endPrefixMapping(String prefix) {
// No visual events occur here.
for (Iterator i = namespaceMappings.keySet( ).iterator( );
i.hasNext( ); ) {
String uri = (String)i.next( );
String thisPrefix = (String)namespaceMappings.get(uri);
if (prefix.equals(thisPrefix)) {
namespaceMappings.remove(uri); break;
}
}

qName, Attributes atts) throws SAXException


public void endElement(String namespaceURI,

String localName, String qName) throws SAXException

length) throws SAXException{

//Не правильно
for (int i=0; i

{ System.out.println(ch[i]);
}

//Правильно
String data = new String(ch, start, length);
}

XMLReaderFactory.createXMLReader( );

//Создаем ContentHandler
ContentHandler myHandler = new MyHandler();

//Регистрируем content handler
reader.setContentHandler(myHandler);

// Разбираем InputSource
inputSource = new InputSource(xmlURI);
reader.parse(inputSource);

SAXException {
try {
FileWriter fw = new FileWriter("error.log");

BufferedWriter bw = new BufferedWriter(fw);
bw.write("Warning: " + exception.getMessage( ) + "\n");
bw.flush( );
bw.close( );
fw.close( );
} catch (IOException e) {
throw new SAXException("Could not write to log file", e);
}
}

SAXException
public void fatalError(SAXParseException exception) throws SAXException

text

{
DOMParser parser = new DOMParser( );

// Get

the DOM tree as a Document object
FileInputStream fis = new FileInputStream(inputXML);
parser.parse(new InputSource(fis));
Document doc = parser.getDocument( );
}

node type
switch (node.getNodeType( ))
{
case Node.DOCUMENT_NODE: break;

case Node.ELEMENT_NODE: break;
case Node.TEXT_NODE: break;
case Node.CDATA_SECTION_NODE: break;
case Node.COMMENT_NODE: break;
case Node.PROCESSING_INSTRUCTION_NODE: break; case Node.ENTITY_REFERENCE_NODE: break;
case Node.DOCUMENT_TYPE_NODE: break;
}

new DOMImplementationImpl( );
Document doc = domImpl.createDocument(null, "item", null);

Element root = doc.getDocumentElement( );

Добавление атрибута id
root.setAttribute("id", id);

Создание нового элемента и текста в нем
Element nameElement = doc.createElement("name");
Text nameText = doc.createTextNode(name); nameElement.appendChild(nameText);
root.appendChild(nameElement);

root.getElementsByTagName("name");
Element nameElement = (Element)nameElements.item(0);
Text nameText = (Text)nameElement.getFirstChild(

); nameText.setData(name);

Получение description элемента
NodeList descriptionElements = root.getElementsByTagName("description");
Element descriptionElement = (Element)descriptionElements.item(0);

Удаление и создание другого description элемента
root.removeChild(descriptionElement);
descriptionElement = doc.createElement("description");
Text descriptionText = doc.createTextNode(description); descriptionElement.appendChild(descriptionText); root.appendChild(descriptionElement);

OutputFormat(doc);

Создаем Writer и Serializer
StringWriter stringOut

= new StringWriter();
XMLSerializer serial = new XMLSerializer(stringOut, format);

получаем интерфейс DOMSerializer
serial.asDOMSerializer();

Сериализуем XML и получаем строку
serial.serialize(doc.getDocumentElement());
String result = stringOut.toString()

import org.w3c.dom.Document;

String filename;
...
DOMParser parser = new

DOMParser();
parser.parse(filename);
Document doc = parser.getDocument();

(2) Xerces: SAX parser
import org.xml.sax.helpers.XMLReaderFactory;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
import org.w3c.dom.Document;
DefaultHandler handler; String filename;
...
XMLReader parser = XMLReaderFactory.createXMLReader();
parser.setContentHandler(handler);
parser.setDTDHandler(handler);
parser.setErrorHandler(handler);
parser.parse(filename);

and Validation
XSL Processing
XPath

import org.w3c.dom.Document; String filename;
...
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();

DocumentBuilder builder = factory.newDocumentBuilder();
Document doc = builder.parse(filename);

(2) JAXP: SAX parser
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.helpers.DefaultHandler;
import org.w3c.dom.Document;
DefaultHandler handler;
String filename;
...
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser parser = factory.newSAXParser();
parser.parse(filename, handler);

во время парсинга как в SAX.
Приложение руководит порядком разбора

StringReader(documentAsString);
XMLInputFactory inputFactory = XMLInputFactory.newInstance( );
XmlStreamReader reader = inputFactory.createXMLStreamReader(stringReader);

type = reader.next( );
switch (type)
{
case XMLStreamConstants.

START_DOCUMENT: …
case XMLStreamConstants.END_DOCUMENT: …
case XMLStreamConstants.START_ELEMENT: …
case XMLStreamConstants.END_ELEMENT: …
case XMLStreamConstants. CHARACTERS: …
case XMLStreamConstants. ATTRIBUTE: …
case XMLStreamConstants. CDATA: …
case XMLStreamConstants. NAMESPACE: …
case XMLStreamConstants. COMMENT: …
case XMLStreamConstants. ENTITY_DECLARATION: …
…
}
}

SimpleStreamOutput {
public static void main(String[] args) throws Exception

{
XMLOutputFactory outputFactory = XMLOutputFactory.newInstance( );
XMLStreamWriter writer = outputFactory.createXMLStreamWriter(System.out);

writer.writeStartDocument("1.0");
writer.writeStartElement("person");
writer.writeStartElement("name");
writer.writeStartElement("first_name");
writer.writeCharacters("Alan");
writer.writeEndElement( );
writer.writeEndElement( );
writer.writeEndElement( );
writer.writeEndDocument( );
writer.flush( );
}
}

поддержку Xpath.
Поддерживает XSLT трансформацию с помощью своего класса унаследованного

от TrAX API Template класса.

модели
SAXBuilder builder = new SAXBuilder( );
Document doc =

builder.build(new FileInputStream("contents.xml"));

DOMBuilder builder = new DOMBuilder( );
Document doc = builder.build(myDomDocumentObject);

Преобразование JDOM в DOM и в SAX events
DOMOutputter outputter = new DOMOutputter( );
org.w3c.dom.Document domDoc = outputter.output(myJDOMDocumentObject);

SAXOutputter outputter = new SAXOutputter( ); outputter.setContentHandler(myContentHandler); outputter.setErrorHandler(myErrorHandler); outputter.output(myJDOMDocumentObject);

Вывод JDOM
XMLOutputter outputter = new XMLOutputter( ); outputter.output(jdomDocumentObject, new FileOutputStream("results.xml"));

с JDOM
Основан на интерфейсах
Имеет поддержку Xpath
Интегрируется с JAXP для

XSLT

= new SAXReader( );
Document doc = reader.read(file);
Создание документа
DocumentFactory

factory = DocumentFactory.getInstance( );
Document doc = factory.createDocument( );
или
Document doc = DocumentHelper.createDocument( );

Добавление элемента
долгий способ
Element myElement = factory.createElement("name");
doc.add(myElement);
быстрый способ
doc.addElement("name");