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Jaxb unmarshaller setvalidating

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Per effettuare un’operazione di unmarshalling occorre istanziare un oggetto JAXBContext, un oggetto Unmarshaller e invocare il metodo per effettuare l’unmarshalling. Occorre specificare il contesto, che rappresenta una lista di uno o più nomi di package che contengono le interfacce generate da un binding compiler.

Se gli schemi utilizzati sono ben strutturati, è sufficiente passare il nome del package contentente la classe contenitore del documento, ossia l’entry point, come vedremo successivamente.

A new Java API called Java Architecture for XML Binding (JAXB) can make it easier to access XML documents from applications written in the Java programming language.

The Extensible Markup Language (XML) and Java technology are natural partners in helping developers exchange data and programs across the Internet.

jaxb unmarshaller setvalidating-83

* @param handler The content handler to use while parsing the file. */ public static List/** * @param file - xml configuration file for Mockey * @throws IOException * @throws SAXException * @throws SAXParse Exception */ private String get File Content As String(File file) throws IOException, SAXParse Exception, SAXException /** * args[0]: the file name of the file to validate args[1]: the file name of the schema to validate against */ public static void main(String[] args) throws IOException, SAXException, Parsing Exception, Validity Exception /** * Wraps a [email protected] SAXException} into a [email protected] Data Set Exception} * @param cause The cause to be wrapped into a [email protected] Data Set Exception} * @return A [email protected] Data Set Exception} that wraps the [email protected] SAXException} */ protected final static Data Set Exception build Exception(SAXException cause) /** * get Config If the configuration file has not been loaded yet, it will be loaded.XML and Java technology are recognized as ideal building blocks for developing Web services and applications that access Web services. More specifically, how do you access and use an XML document (that is, a file containing XML-tagged data) through the Java programming language?One way to do this, perhaps the most typical way, is through parsers that conform to the Simple API for XML (SAX) or the Document Object Model (DOM).It provides an overloading of unmarshal methods 37 * for many different input kinds.38 * 39 * 40 * Unmarshalling from a File: 41 * 54 * Input Stream is = new File Input Stream( "nosferatu.xml" ); 55 * JAXBContext jc = Instance( "foo" ); 56 * Unmarshaller u = jc.create Unmarshaller(); 57 * Object o = u.unmarshal( is ); 58 * 65 * JAXBContext jc = Instance( "foo" ); 66 * Unmarshaller u = jc.create Unmarshaller(); 67 * URL url = new URL( " ); 68 * Object o = u.unmarshal( url ); 69 * 77 * JAXBContext jc = Instance( "foo" ); 78 * Unmarshaller u = jc.create Unmarshaller(); 79 * String Buffer xml Str = new String Buffer( "<? >..." ); 80 * Object o = u.unmarshal( new Stream Source( new String Reader( xml String() ) ) ); 81 * 88 * JAXBContext jc = Instance( "foo" ); 89 * Unmarshaller u = jc.create Unmarshaller(); 90 * 91 * Document Builder Factory dbf = Document Builder Instance(); 92 * Namespace Aware(true); 93 * Document Builder db = Document Builder(); 94 * Document doc = db.parse(new File( "nosferatu.xml")); 95 96 * Object o = u.unmarshal( doc ); 97 * 105 * // configure a validating SAX2.0 parser (Xerces2) 106 * static final String JAXP_SCHEMA_LANGUAGE = 107 * " Language"; 108 * static final String JAXP_SCHEMA_LOCATION = 109 * " Source"; 110 * static final String W3C_XML_SCHEMA = 111 * " 112 * 113 * Property( "parsers. SAXParser Factory Impl" ); 115 * 116 * SAXParser Factory spf = SAXParser Instance(); 117 * Namespace Aware(true); 118 * Validating(true); 119 * SAXParser sax Parser = SAXParser(); 120 * 121 * try catch (SAXNot Recognized Exception x) 127 * 128 * XMLReader xml Reader = sax XMLReader(); 129 * SAXSource source = 130 * new SAXSource( xml Reader, new Input Source( " ) ); 131 * 132 * // Setup JAXB to unmarshal 133 * JAXBContext jc = Instance( "foo" ); 134 * Unmarshaller u = jc.create Unmarshaller(); 135 * Validation Event Collector vec = new Validation Event Collector(); 136 * Event Handler( vec ); 137 * 138 * // turn off the JAXB provider's default validation mechanism to 139 * // avoid duplicate validation 140 * Validating( false ) 141 * 142 * // unmarshal 143 * Object o = u.unmarshal( source ); 144 * 145 * // check for events 146 * if( Events() ) 149 * 156 * JAXBContext jc = Instance( "foo" ); 157 * Unmarshaller u = jc.create Unmarshaller(); 158 * 159 * stream. XMLInput Factory()Instance().create XMLStream Reader( ... ); 161 * 162 * Object o = u.unmarshal( xml Stream Reader ); 163 * 170 * JAXBContext jc = Instance( "foo" ); 171 * Unmarshaller u = jc.create Unmarshaller(); 172 * 173 * stream. XMLInput Factory()Instance().create XMLEvent Reader( ... ); 175 * 176 * Object o = u.unmarshal( xml Event Reader ); 177 * 184 * Unmarshalling can deserialize XML data that represents either an entire XML document 185 * or a subtree of an XML document.Questo aspetto è importante perché come vedremo ci consentirà di creare una classe generica utilizzabile per l’unmarshalling di tutti i documenti XML. Si suppone che nel progetto si siano importate le classi generate dal binding compiler, rispettando i nomi dei package creati (conseguentemente sotto la cartella src troveremo i package verrà ritornato un oggetto generico.