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JAXP 1.1 JAXP 1.1 Included in Java since JDK 1.4 Included in Java - PDF document

Jan 18, 2024 •223 likes •263 views

2.3 JAXP: Java API for XML Processing 2.3 JAXP: Java API for XML Processing JAXP 1.1 JAXP 1.1 Included in Java since JDK 1.4 Included in Java since JDK 1.4 How can applications use XML processors? How can applications use XML

  1. 2.3 JAXP: Java API for XML Processing 2.3 JAXP: Java API for XML Processing JAXP 1.1 JAXP 1.1 � Included in Java since JDK 1.4 Included in Java since JDK 1.4 � � How can applications use XML processors? How can applications use XML processors? � � An interface for An interface for “ “plugging plugging- -in in” ” and using XML and using XML � – A Java – A Java- -based answer: through based answer: through JAXP JAXP processors in Java applications processors in Java applications – – An overview of the JAXP interface An overview of the JAXP interface – includes packages – includes packages » What does it specify? » What does it specify? » » org.xml.sax org.xml.sax: : SAX 2.0 SAX 2.0 » What can be done with it? » What can be done with it? org.w3c.dom: DOM Level 2 DOM Level 2 » org.w3c.dom: » » » How do the JAXP components fit together? How do the JAXP components fit together? » » javax.xml.parsers javax.xml.parsers: : initialization and use of parsers initialization and use of parsers [Partly based on tutorial “ [Partly based on tutorial “An Overview of the APIs An Overview of the APIs” ” at at http://java.sun.com/xml/jaxp/dist/1.1/docs/tutorial/overview http://java.sun.com/xml/jaxp/dist/1.1/docs/tutorial/overview » javax.xml.transform javax.xml.transform: : » /3_apis.html, from which also some graphics are borrowed] /3_apis.html, from which also some graphics are borrowed] initialization and use of transformers initialization and use of transformers (XSLT processors) (XSLT processors) XPT 2006 XML APIs: JAXP 1 XPT 2006 XML APIs: JAXP 2 Later Versions Later Versions JAXP: XML processor plugin plugin (1) (1) JAXP: XML processor � JAXP 1.2 (2002) adds property JAXP 1.2 (2002) adds property- -strings for strings for � � Vendor Vendor- -independent method for selecting independent method for selecting � setting the language and source of a schema setting the language and source of a schema processor implementation at run time processor implementation at run time used for (non used for (non- -DTD DTD- -based) validation based) validation – – principally through system properties principally through system properties � JAXP 1.3 included in JDK 5.0 (2005) JAXP 1.3 included in JDK 5.0 (2005) javax.xml.parsers.SAXParserFactory javax.xml.parsers.SAXParserFactory � javax.xml.parsers.DocumentBuilderFactory javax.xml.parsers.DocumentBuilderFactory – more flexible validation (decoupled from parsing) – more flexible validation (decoupled from parsing) javax.xml.transform.TransformerFactory javax.xml.transform.TransformerFactory – support for DOM3 and – support for DOM3 and XPath XPath – – Set on command line (for example, to use Apache Set on command line (for example, to use Apache Xerces as the DOM implementation): as the DOM implementation): Xerces � We'll restrict to basic ideas from JAXP 1.1 We'll restrict to basic ideas from JAXP 1.1 � java java -D - D javax.xml.parsers.DocumentBuilderFactory javax.xml.parsers.DocumentBuilderFactory= = org.apache.xerces.jaxp.DocumentBuilderFactoryImpl org.apache.xerces.jaxp.DocumentBuilderFactoryImpl XPT 2006 XML APIs: JAXP 3 XPT 2006 XML APIs: JAXP 4 JAXP: XML processor plugin plugin (2) (2) JAXP: Functionality JAXP: Functionality JAXP: XML processor – – Set during execution ( Set during execution ( − > Saxon as the XSLT Saxon as the XSLT impl impl): ): −> � Parsing using SAX 2.0 or DOM Level 2 Parsing using SAX 2.0 or DOM Level 2 � System.setProperty System.setProperty( ( � Transformation using XSLT Transformation using XSLT "javax.xml.transform.TransformerFactory javax.xml.transform.TransformerFactory", ", " � " "com.icl.saxon.TransformerFactoryImpl com.icl.saxon.TransformerFactoryImpl"); "); – (We – (We’ ’ll study XSLT in detail later) ll study XSLT in detail later) � By default, reference implementations used By default, reference implementations used � � Adds functionality missing from SAX 2.0 and Adds functionality missing from SAX 2.0 and � – Apache Crimson/ – Apache Crimson/Xerces Xerces as the XML parser as the XML parser DOM Level 2: DOM Level 2: – – Apache Apache Xalan Xalan as the XSLT processor as the XSLT processor – – controlling validation and handling of parse errors controlling validation and handling of parse errors � Supported by a few compliant processors: Supported by a few compliant processors: � » error handling » error handling can can be controlled in SAX, be controlled in SAX, – – Parsers: Apache Crimson and Parsers: Apache Crimson and Xerces Xerces, , Aelfred Aelfred, , by implementing ErrorHandler by implementing ErrorHandler methods methods Oracle XML Parser for Java Oracle XML Parser for Java – – loading and saving of DOM Document objects loading and saving of DOM Document objects – XSLT transformers: Apache XSLT transformers: Apache Xalan Xalan, Saxon , Saxon – XPT 2006 XML APIs: JAXP 5 XPT 2006 XML APIs: JAXP 6 JAXP JAXP Parsing Parsing API API JAXP: Using JAXP: Using a SAX a SAX parser parser (1) (1) . .newSAXParser newSAXParser() () � Included Included in JAXP in JAXP package package � .getXMLReader getXMLReader() () . javax.xml.parsers javax.xml.parsers � Used for invoking and using SAX Used for invoking and using SAX … … � XML XML SAXParserFactory spf SAXParserFactory spf = = SAXParserFactory SAXParserFactory. .newInstance newInstance(); (); .parse . parse( ( ”f.xml f.xml” ”) ) ” and DOM parser implementations: and DOM parser implementations: f.xml f.xml DocumentBuilderFactory dbf = dbf = DocumentBuilderFactory DocumentBuilderFactory DocumentBuilderFactory. .newInstance newInstance(); (); XPT 2006 XML APIs: JAXP 7 XPT 2006 XML APIs: JAXP 8

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