All Known Implementing Classes:: AbstractUnmarshallerImpl

public interface Unmarshaller

The Unmarshaller class governs the process of deserializing XML data into newly created Java content trees, optionally validating the XML data as it is unmarshalled. It provides an overloading of unmarshal methods for many different input kinds.

Unmarshalling from a File:

 JAXBContext jc = JAXBContext.newInstance( "com.acme.foo" );
 Unmarshaller u = jc.createUnmarshaller();
 Object o = u.unmarshal( new File( "nosferatu.xml" ) );

Unmarshalling from an InputStream:

 InputStream is = new FileInputStream( "nosferatu.xml" );
 JAXBContext jc = JAXBContext.newInstance( "com.acme.foo" );
 Unmarshaller u = jc.createUnmarshaller();
 Object o = u.unmarshal( is );

Unmarshalling from a URL:

 JAXBContext jc = JAXBContext.newInstance( "com.acme.foo" );
 Unmarshaller u = jc.createUnmarshaller();
 URL url = new URL( "http://beaker.east/nosferatu.xml" );
 Object o = u.unmarshal( url );

Unmarshalling from a StringBuffer using a javax.xml.transform.stream.StreamSource:

 JAXBContext jc = JAXBContext.newInstance( "com.acme.foo" );
 Unmarshaller u = jc.createUnmarshaller();
 StringBuffer xmlStr = new StringBuffer( "<?xml version="1.0"?>..." );
 Object o = u.unmarshal( new StreamSource( new StringReader( xmlStr.toString() ) ) );

Unmarshalling from a org.w3c.dom.Node:

 JAXBContext jc = JAXBContext.newInstance( "com.acme.foo" );
 Unmarshaller u = jc.createUnmarshaller();

 DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
 dbf.setNamespaceAware(true);
 DocumentBuilder db = dbf.newDocumentBuilder();
 Document doc = db.parse(new File( "nosferatu.xml"));

 Object o = u.unmarshal( doc );

Unmarshalling from a javax.xml.transform.sax.SAXSource using a client specified validating SAX2.0 parser:

 // configure a validating SAX2.0 parser (Xerces2)
 static final String JAXP_SCHEMA_LANGUAGE =
      "http://java.sun.com/xml/jaxp/properties/schemaLanguage";
 static final String JAXP_SCHEMA_LOCATION =
      "http://java.sun.com/xml/jaxp/properties/schemaSource";
 static final String W3C_XML_SCHEMA =
      "http://www.w3.org/2001/XMLSchema";

 System.setProperty( "javax.xml.parsers.SAXParserFactory",
                     "org.apache.xerces.jaxp.SAXParserFactoryImpl" );

 SAXParserFactory spf = SAXParserFactory.newInstance();
 spf.setNamespaceAware(true);
 spf.setValidating(true);
 SAXParser saxParser = spf.newSAXParser();

 try {
     saxParser.setProperty(JAXP_SCHEMA_LANGUAGE, W3C_XML_SCHEMA);
     saxParser.setProperty(JAXP_SCHEMA_LOCATION, "http://....");
 } catch (SAXNotRecognizedException x) {
     // exception handling omitted
 }

 XMLReader xmlReader = saxParser.getXMLReader();
 SAXSource source =
     new SAXSource( xmlReader, new InputSource( "http://..." ) );

 // Setup Jakarta XML Binding to unmarshal
 JAXBContext jc = JAXBContext.newInstance( "com.acme.foo" );
 Unmarshaller u = jc.createUnmarshaller();
 ValidationEventCollector vec = new ValidationEventCollector();
 u.setEventHandler( vec );

 // turn off the Jakarta XML Binding provider's default validation mechanism to
 // avoid duplicate validation
 u.setValidating( false )

 // unmarshal
 Object o = u.unmarshal( source );

 // check for events
 if( vec.hasEvents() ) {
     // iterate over events
 }

Unmarshalling from a StAX XMLStreamReader:

 JAXBContext jc = JAXBContext.newInstance( "com.acme.foo" );
 Unmarshaller u = jc.createUnmarshaller();

 javax.xml.stream.XMLStreamReader xmlStreamReader =
     javax.xml.stream.XMLInputFactory().newInstance().createXMLStreamReader( ... );

 Object o = u.unmarshal( xmlStreamReader );

Unmarshalling from a StAX XMLEventReader:

 JAXBContext jc = JAXBContext.newInstance( "com.acme.foo" );
 Unmarshaller u = jc.createUnmarshaller();

 javax.xml.stream.XMLEventReader xmlEventReader =
     javax.xml.stream.XMLInputFactory().newInstance().createXMLEventReader( ... );

Object o = u.unmarshal( xmlEventReader );

Unmarshalling XML Data

Unmarshalling can deserialize XML data that represents either an entire XML document or a subtree of an XML document. Typically, it is sufficient to use the unmarshalling methods described by Unmarshal root element that is declared globally. These unmarshal methods utilize JAXBContext's mapping of global XML element declarations and type definitions to Jakarta XML Binding mapped classes to initiate the unmarshalling of the root element of XML data. When the JAXBContext's mappings are not sufficient to unmarshal the root element of XML data, the application can assist the unmarshalling process by using the unmarshal by declaredType methods. These methods are useful for unmarshalling XML data where the root element corresponds to a local element declaration in the schema.

An unmarshal method never returns null. If the unmarshal process is unable to unmarshal the root of XML content to a Jakarta XML Binding mapped object, a fatal error is reported that terminates processing by throwing JAXBException.

Unmarshal a root element that is globally declared

The unmarshal methods that do not have an declaredType parameter use JAXBContext to unmarshal the root element of an XML data. The JAXBContext instance is the one that was used to create this Unmarshaller. The JAXBContext instance maintains a mapping of globally declared XML element and type definition names to Jakarta XML Binding mapped classes. The unmarshal method checks if JAXBContext has a mapping from the root element's XML name and/or @xsi:type to a Jakarta XML Binding mapped class. If it does, it unmarshalls the XML data using the appropriate Jakarta XML Binding mapped class. Note that when the root element name is unknown and the root element has an @xsi:type, the XML data is unmarshalled using that Jakarta XML Binding mapped class as the value of a JAXBElement. When the JAXBContext object does not have a mapping for the root element's name nor its @xsi:type, if it exists, then the unmarshal operation will abort immediately by throwing a UnmarshalException. This exception scenario can be worked around by using the unmarshal by declaredType methods described in the next subsection.

Unmarshal by Declared Type

The unmarshal methods with a declaredType parameter enable an application to deserialize a root element of XML data, even when there is no mapping in JAXBContext of the root element's XML name. The unmarshaller unmarshalls the root element using the application provided mapping specified as the declaredType parameter. Note that even when the root element's element name is mapped by JAXBContext, the declaredType parameter overrides that mapping for deserializing the root element when using these unmarshal methods. Additionally, when the root element of XML data has an xsi:type attribute and that attribute's value references a type definition that is mapped to a Jakarta XML Binding mapped class by JAXBContext, that the root element's xsi:type attribute takes precedence over the unmarshal methods declaredType parameter. These methods always return a JAXBElement<declaredType> instance. The table below shows how the properties of the returned JAXBElement instance are set.
Unmarshal By Declared Type returned JAXBElement

JAXBElement Property Value

name xml element name

value instanceof declaredType

declaredType unmarshal method declaredType parameter

scope null (actual scope is unknown)

The following is an example of unmarshal by declaredType method.

Unmarshal by declaredType from a org.w3c.dom.Node:

  <!-- Schema fragment for example -->
  <xs:schema>
    <xs:complexType name="FooType">...</xs:complexType>
    <!-- global element declaration "PurchaseOrder" -->
    <xs:element name="PurchaseOrder">
      <xs:complexType>
        <xs:sequence>
          <!-- local element declaration "foo" -->
          <xs:element name="foo" type="FooType"/>
          ...
        </xs:sequence>
      </xs:complexType>
    </xs:element>
  </xs:schema>

 JAXBContext jc = JAXBContext.newInstance( "com.acme.foo" );
 Unmarshaller u = jc.createUnmarshaller();

 DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
 dbf.setNamespaceAware(true);
 DocumentBuilder db = dbf.newDocumentBuilder();
 Document doc = db.parse(new File( "nosferatu.xml"));
 Element  fooSubtree = ...; // traverse DOM till reach xml element foo, constrained by a
                            // local element declaration in schema.

 // FooType is the Jakarta XML Binding mapping of the type of local element declaration foo.
 JAXBElement<FooType> foo = u.unmarshal( fooSubtree, FooType.class);

Support for SAX2.0 Compliant Parsers

A client application has the ability to select the SAX2.0 compliant parser of their choice. If a SAX parser is not selected, then the Jakarta XML Binding Provider's default parser will be used. Even though the Jakarta XML Binding Provider's default parser is not required to be SAX2.0 compliant, all providers are required to allow a client application to specify their own SAX2.0 parser. Some providers may require the client application to specify the SAX2.0 parser at schema compile time. See unmarshal(Source) for more detail.

Validation and Well-Formedness

A client application can enable or disable JAXP validation mechanism via the setSchema(javax.xml.validation.Schema) API. Sophisticated clients can specify their own validating SAX 2.0 compliant parser and bypass the JAXP validation mechanism using the unmarshal(Source) API.
Since unmarshalling invalid XML content is defined in Jakarta XML Binding, the Unmarshaller default validation event handler was made more lenient than in JAXB 1.0. When schema-derived code generated by JAXB 1.0 binding compiler is registered with JAXBContext, the default unmarshal validation handler is DefaultValidationEventHandler and it terminates the marshal operation after encountering either a fatal error or an error. For a Jakarta XML Binding client application, there is no explicitly defined default validation handler and the default event handling only terminates the unmarshal operation after encountering a fatal error.

Supported Properties

There currently are not any properties required to be supported by all Jakarta XML Binding Providers on Unmarshaller. However, some providers may support their own set of provider specific properties.

Unmarshal Event Callbacks

The Unmarshaller provides two styles of callback mechanisms that allow application specific processing during key points in the unmarshalling process. In 'class defined' event callbacks, application specific code placed in Jakarta XML Binding mapped classes is triggered during unmarshalling. 'External listeners' allow for centralized processing of unmarshal events in one callback method rather than by type event callbacks.
'Class defined' event callback methods allow any Jakarta XML Binding mapped class to specify its own specific callback methods by defining methods with the following method signature:
 // This method is called immediately after the object is created and before the unmarshalling of this
 // object begins. The callback provides an opportunity to initialize JavaBean properties prior to unmarshalling.
 void beforeUnmarshal(Unmarshaller, Object parent);

 //This method is called after all the properties (except IDREF) are unmarshalled for this object,
 //but before this object is set to the parent object.
 void afterUnmarshal(Unmarshaller, Object parent);
The class defined callback methods should be used when the callback method requires access to non-public methods and/or fields of the class.
The external listener callback mechanism enables the registration of a Unmarshaller.Listener instance with an setListener(Listener). The external listener receives all callback events, allowing for more centralized processing than per class defined callback methods. The external listener receives events when unmarshalling process is marshalling to a Jakarta XML Binding element or to Jakarta XML Binding mapped class.
The 'class defined' and external listener event callback methods are independent of each other, both can be called for one event. The invocation ordering when both listener callback methods exist is defined in Unmarshaller.Listener.beforeUnmarshal(Object, Object) and Unmarshaller.Listener.afterUnmarshal(Object, Object).
An event callback method throwing an exception terminates the current unmarshal process.

Author:

Ryan Shoemaker, Sun Microsystems, Inc.
Kohsuke Kawaguchi, Sun Microsystems, Inc.
Joe Fialli, Sun Microsystems, Inc.

See Also:

Nested Class Summary

Nested Classes

Modifier and Type

Interface

Description

static class

Unmarshaller.Listener

Register an instance of an implementation of this class with Unmarshaller to externally listen for unmarshal events.
Method Summary

Modifier and Type

Method

Description

<A extends XmlAdapter<?, ?>> A

getAdapter(Class<A> type)

Gets the adapter associated with the specified type.

AttachmentUnmarshaller

getAttachmentUnmarshaller()

ValidationEventHandler

getEventHandler()

Return the current event handler or the default event handler if one hasn't been set.

Unmarshaller.Listener

getListener()

Return Unmarshaller.Listener registered with this Unmarshaller.

Object

getProperty(String name)

Get the particular property in the underlying implementation of Unmarshaller.

Schema

getSchema()

Get the JAXP Schema object being used to perform unmarshal-time validation.

UnmarshallerHandler

getUnmarshallerHandler()

Get an unmarshaller handler object that can be used as a component in an XML pipeline.

<A extends XmlAdapter<?, ?>> void

setAdapter(A adapter)

Associates a configured instance of XmlAdapter with this unmarshaller.

<A extends XmlAdapter<?, ?>> void

setAdapter(Class<A> type, A adapter)

Associates a configured instance of XmlAdapter with this unmarshaller.

void

setAttachmentUnmarshaller(AttachmentUnmarshaller au)

Associate a context that resolves cid's, content-id URIs, to binary data passed as attachments.

void

setEventHandler(ValidationEventHandler handler)

Allow an application to register a ValidationEventHandler.

void

setListener(Unmarshaller.Listener listener)

Register unmarshal event callback Unmarshaller.Listener with this Unmarshaller.

void

setProperty(String name, Object value)

Set the particular property in the underlying implementation of Unmarshaller.

void

setSchema(Schema schema)

Specify the JAXP Schema object that should be used to validate subsequent unmarshal operations against.

Object

unmarshal(File f)

Unmarshal XML data from the specified file and return the resulting content tree.

Object

unmarshal(InputStream is)

Unmarshal XML data from the specified InputStream and return the resulting content tree.

Object

unmarshal(Reader reader)

Unmarshal XML data from the specified Reader and return the resulting content tree.

Object

unmarshal(URL url)

Unmarshal XML data from the specified URL and return the resulting content tree.

Object

unmarshal(XMLEventReader reader)

Unmarshal XML data from the specified pull parser and return the resulting content tree.

<T> JAXBElement<T>

unmarshal(XMLEventReader reader, Class<T> declaredType)

Unmarshal root element to Jakarta XML Binding mapped declaredType and return the resulting content tree.

Object

unmarshal(XMLStreamReader reader)

Unmarshal XML data from the specified pull parser and return the resulting content tree.

<T> JAXBElement<T>

unmarshal(XMLStreamReader reader, Class<T> declaredType)

Unmarshal root element to Jakarta XML Binding mapped declaredType and return the resulting content tree.

Object

unmarshal(Source source)

Unmarshal XML data from the specified XML Source and return the resulting content tree.

<T> JAXBElement<T>

unmarshal(Source source, Class<T> declaredType)

Unmarshal XML data from the specified XML Source by declaredType and return the resulting content tree.

Object

unmarshal(Node node)

Unmarshal global XML data from the specified DOM tree and return the resulting content tree.

<T> JAXBElement<T>

unmarshal(Node node, Class<T> declaredType)

Unmarshal XML data by Jakarta XML Binding mapped declaredType and return the resulting content tree.

Object

unmarshal(InputSource source)

Unmarshal XML data from the specified SAX InputSource and return the resulting content tree.

Method Details
- unmarshal
  
  Object unmarshal(File f) throws JAXBException
  
  Unmarshal XML data from the specified file and return the resulting content tree.
  Implements Unmarshal Global Root Element.
  
  Parameters:
  
  f - the file to unmarshal XML data from
  
  Returns:
  
  the newly created root object of the java content tree
  
  Throws:
  
  JAXBException - If any unexpected errors occur while unmarshalling
  
  UnmarshalException - If the ValidationEventHandler returns false from its handleEvent method or the Unmarshaller is unable to perform the XML to Java binding. See Unmarshalling XML Data
  
  IllegalArgumentException - If the file parameter is null
- unmarshal
  
  Object unmarshal(InputStream is) throws JAXBException
  
  Unmarshal XML data from the specified InputStream and return the resulting content tree. Validation event location information may be incomplete when using this form of the unmarshal API.
  Implements Unmarshal Global Root Element.
  
  Parameters:
  
  is - the InputStream to unmarshal XML data from
  
  Returns:
  
  the newly created root object of the java content tree
  
  Throws:
  
  JAXBException - If any unexpected errors occur while unmarshalling
  
  UnmarshalException - If the ValidationEventHandler returns false from its handleEvent method or the Unmarshaller is unable to perform the XML to Java binding. See Unmarshalling XML Data
  
  IllegalArgumentException - If the InputStream parameter is null
- unmarshal
  
  Object unmarshal(Reader reader) throws JAXBException
  
  Unmarshal XML data from the specified Reader and return the resulting content tree. Validation event location information may be incomplete when using this form of the unmarshal API, because a Reader does not provide the system ID.
  Implements Unmarshal Global Root Element.
  
  Parameters:
  
  reader - the Reader to unmarshal XML data from
  
  Returns:
  
  the newly created root object of the java content tree
  
  Throws:
  
  JAXBException - If any unexpected errors occur while unmarshalling
  
  UnmarshalException - If the ValidationEventHandler returns false from its handleEvent method or the Unmarshaller is unable to perform the XML to Java binding. See Unmarshalling XML Data
  
  IllegalArgumentException - If the InputStream parameter is null
- unmarshal
  
  Object unmarshal(URL url) throws JAXBException
  
  Unmarshal XML data from the specified URL and return the resulting content tree.
  Implements Unmarshal Global Root Element.
  
  Parameters:
  
  url - the url to unmarshal XML data from
  
  Returns:
  
  the newly created root object of the java content tree
  
  Throws:
  
  JAXBException - If any unexpected errors occur while unmarshalling
  
  UnmarshalException - If the ValidationEventHandler returns false from its handleEvent method or the Unmarshaller is unable to perform the XML to Java binding. See Unmarshalling XML Data
  
  IllegalArgumentException - If the URL parameter is null
- unmarshal
  
  Object unmarshal(InputSource source) throws JAXBException
  
  Unmarshal XML data from the specified SAX InputSource and return the resulting content tree.
  Implements Unmarshal Global Root Element.
  
  Parameters:
  
  source - the input source to unmarshal XML data from
  
  Returns:
  
  the newly created root object of the java content tree
  
  Throws:
  
  JAXBException - If any unexpected errors occur while unmarshalling
  
  UnmarshalException - If the ValidationEventHandler returns false from its handleEvent method or the Unmarshaller is unable to perform the XML to Java binding. See Unmarshalling XML Data
  
  IllegalArgumentException - If the InputSource parameter is null
- unmarshal
  
  Object unmarshal(Node node) throws JAXBException
  
  Unmarshal global XML data from the specified DOM tree and return the resulting content tree.
  Implements Unmarshal Global Root Element.
  Parameters:
  
  node - the document/element to unmarshal XML data from. The caller must support at least Document and Element.
  
  Returns:
  
  the newly created root object of the java content tree
  
  Throws:
  
  JAXBException - If any unexpected errors occur while unmarshalling
  
  UnmarshalException - If the ValidationEventHandler returns false from its handleEvent method or the Unmarshaller is unable to perform the XML to Java binding. See Unmarshalling XML Data
  
  IllegalArgumentException - If the Node parameter is null
  
  See Also:
  
  unmarshal(org.w3c.dom.Node, Class)
- unmarshal
  
  <T> JAXBElement<T> unmarshal(Node node, Class<T> declaredType) throws JAXBException
  
  Unmarshal XML data by Jakarta XML Binding mapped declaredType and return the resulting content tree.
  Implements Unmarshal by Declared Type
  
  Type Parameters:
  
  T - the XML Binding mapped class
  
  Parameters:
  
  node - the document/element to unmarshal XML data from. The caller must support at least Document and Element.
  
  declaredType - appropriate Jakarta XML Binding mapped class to hold node's XML data.
  
  Returns:
  
  JAXBElement representation of node
  
  Throws:
  
  JAXBException - If any unexpected errors occur while unmarshalling
  
  UnmarshalException - If the ValidationEventHandler returns false from its handleEvent method or the Unmarshaller is unable to perform the XML to Java binding. See Unmarshalling XML Data
  
  IllegalArgumentException - If any parameter is null
- unmarshal
  
  Object unmarshal(Source source) throws JAXBException
  
  Unmarshal XML data from the specified XML Source and return the resulting content tree.
  Implements Unmarshal Global Root Element.
  SAX 2.0 Parser Pluggability
  A client application can choose not to use the default parser mechanism supplied with their Jakarta XML Binding provider. Any SAX 2.0 compliant parser can be substituted for the Jakarta XML Binding provider's default mechanism. To do so, the client application must properly configure a SAXSource containing an XMLReader implemented by the SAX 2.0 parser provider. If the XMLReader has an org.xml.sax.ErrorHandler registered on it, it will be replaced by the Jakarta XML Binding Provider so that validation errors can be reported via the ValidationEventHandler mechanism of Jakarta XML Binding. If the SAXSource does not contain an XMLReader, then the Jakarta XML Binding provider's default parser mechanism will be used.
  This parser replacement mechanism can also be used to replace the Jakarta XML Binding provider's unmarshal-time validation engine. The client application must properly configure their SAX 2.0 compliant parser to perform validation (as shown in the example above). Any SAXParserExceptions encountered by the parser during the unmarshal operation will be processed by the Jakarta XML Binding provider and converted into Jakarta XML Binding ValidationEvent objects which will be reported back to the client via the ValidationEventHandler registered with the Unmarshaller. Note: specifying a substitute validating SAX 2.0 parser for unmarshalling does not necessarily replace the validation engine used by the Jakarta XML Binding provider for performing on-demand validation.
  The only way for a client application to specify an alternate parser mechanism to be used during unmarshal is via the unmarshal(SAXSource) API. All other forms of the unmarshal method (File, URL, Node, etc.) will use the Jakarta XML Binding provider's default parser and validator mechanisms.
  Parameters:
  
  source - the XML Source to unmarshal XML data from (providers are only required to support SAXSource, DOMSource, and StreamSource)
  
  Returns:
  
  the newly created root object of the java content tree
  
  Throws:
  
  JAXBException - If any unexpected errors occur while unmarshalling
  
  UnmarshalException - If the ValidationEventHandler returns false from its handleEvent method or the Unmarshaller is unable to perform the XML to Java binding. See Unmarshalling XML Data
  
  IllegalArgumentException - If the Source parameter is null
  
  See Also:
  
  unmarshal(javax.xml.transform.Source, Class)
- unmarshal
  
  <T> JAXBElement<T> unmarshal(Source source, Class<T> declaredType) throws JAXBException
  
  Unmarshal XML data from the specified XML Source by declaredType and return the resulting content tree.
  Implements Unmarshal by Declared Type
  See SAX 2.0 Parser Pluggability
  
  Type Parameters:
  
  T - the XML Binding mapped class
  
  Parameters:
  
  source - the XML Source to unmarshal XML data from (providers are only required to support SAXSource, DOMSource, and StreamSource)
  
  declaredType - appropriate Jakarta XML Binding mapped class to hold source's xml root element
  
  Returns:
  
  Java content rooted by JAXBElement
  
  Throws:
  
  JAXBException - If any unexpected errors occur while unmarshalling
  
  UnmarshalException - If the ValidationEventHandler returns false from its handleEvent method or the Unmarshaller is unable to perform the XML to Java binding. See Unmarshalling XML Data
  
  IllegalArgumentException - If any parameter is null
- unmarshal
  
  Object unmarshal(XMLStreamReader reader) throws JAXBException
  
  Unmarshal XML data from the specified pull parser and return the resulting content tree.
  Implements Unmarshal Global Root Element.
  This method assumes that the parser is on a START_DOCUMENT or START_ELEMENT event. Unmarshalling will be done from this start event to the corresponding end event. If this method returns successfully, the reader will be pointing at the token right after the end event.
  Parameters:
  
  reader - The parser to be read.
  
  Returns:
  
  the newly created root object of the java content tree.
  
  Throws:
  
  JAXBException - If any unexpected errors occur while unmarshalling
  
  UnmarshalException - If the ValidationEventHandler returns false from its handleEvent method or the Unmarshaller is unable to perform the XML to Java binding. See Unmarshalling XML Data
  
  IllegalArgumentException - If the reader parameter is null
  
  IllegalStateException - If reader is not pointing to a START_DOCUMENT or START_ELEMENT event.
  
  See Also:
  
  unmarshal(javax.xml.stream.XMLStreamReader, Class)
- unmarshal
  
  <T> JAXBElement<T> unmarshal(XMLStreamReader reader, Class<T> declaredType) throws JAXBException
  
  Unmarshal root element to Jakarta XML Binding mapped declaredType and return the resulting content tree.
  This method implements unmarshal by declaredType.
  This method assumes that the parser is on a START_DOCUMENT or START_ELEMENT event. Unmarshalling will be done from this start event to the corresponding end event. If this method returns successfully, the reader will be pointing at the token right after the end event.
  
  Type Parameters:
  
  T - the XML Binding mapped class
  
  Parameters:
  
  reader - The parser to be read.
  
  declaredType - appropriate Jakarta XML Binding mapped class to hold reader's START_ELEMENT XML data.
  
  Returns:
  
  content tree rooted by JAXBElement representation
  
  Throws:
  
  JAXBException - If any unexpected errors occur while unmarshalling
  
  UnmarshalException - If the ValidationEventHandler returns false from its handleEvent method or the Unmarshaller is unable to perform the XML to Java binding. See Unmarshalling XML Data
  
  IllegalArgumentException - If any parameter is null
- unmarshal
  
  Object unmarshal(XMLEventReader reader) throws JAXBException
  
  Unmarshal XML data from the specified pull parser and return the resulting content tree.
  This method is an Unmarshal Global Root method.
  This method assumes that the parser is on a START_DOCUMENT or START_ELEMENT event. Unmarshalling will be done from this start event to the corresponding end event. If this method returns successfully, the reader will be pointing at the token right after the end event.
  Parameters:
  
  reader - The parser to be read.
  
  Returns:
  
  the newly created root object of the java content tree.
  
  Throws:
  
  JAXBException - If any unexpected errors occur while unmarshalling
  
  UnmarshalException - If the ValidationEventHandler returns false from its handleEvent method or the Unmarshaller is unable to perform the XML to Java binding. See Unmarshalling XML Data
  
  IllegalArgumentException - If the reader parameter is null
  
  IllegalStateException - If reader is not pointing to a START_DOCUMENT or START_ELEMENT event.
  
  See Also:
  
  unmarshal(javax.xml.stream.XMLEventReader, Class)
- unmarshal
  
  <T> JAXBElement<T> unmarshal(XMLEventReader reader, Class<T> declaredType) throws JAXBException
  
  Unmarshal root element to Jakarta XML Binding mapped declaredType and return the resulting content tree.
  This method implements unmarshal by declaredType.
  This method assumes that the parser is on a START_DOCUMENT or START_ELEMENT event. Unmarshalling will be done from this start event to the corresponding end event. If this method returns successfully, the reader will be pointing at the token right after the end event.
  
  Type Parameters:
  
  T - the XML Binding mapped class
  
  Parameters:
  
  reader - The parser to be read.
  
  declaredType - appropriate Jakarta XML Binding mapped class to hold reader's START_ELEMENT XML data.
  
  Returns:
  
  content tree rooted by JAXBElement representation
  
  Throws:
  
  JAXBException - If any unexpected errors occur while unmarshalling
  
  UnmarshalException - If the ValidationEventHandler returns false from its handleEvent method or the Unmarshaller is unable to perform the XML to Java binding. See Unmarshalling XML Data
  
  IllegalArgumentException - If any parameter is null
- getUnmarshallerHandler
  
  UnmarshallerHandler getUnmarshallerHandler()
  
  Get an unmarshaller handler object that can be used as a component in an XML pipeline.
  The Jakarta XML Binding Provider can return the same handler object for multiple invocations of this method. In other words, this method does not necessarily create a new instance of UnmarshallerHandler. If the application needs to use more than one UnmarshallerHandler, it should create more than one Unmarshaller.
  Returns:
  
  the unmarshaller handler object
  
  See Also:
  
  UnmarshallerHandler
- setEventHandler
  
  void setEventHandler(ValidationEventHandler handler) throws JAXBException
  
  Allow an application to register a ValidationEventHandler.
  The ValidationEventHandler will be called by the Jakarta XML Binding Provider if any validation errors are encountered during calls to any of the unmarshal methods. If the client application does not register a ValidationEventHandler before invoking the unmarshal methods, then ValidationEvents will be handled by the default event handler which will terminate the unmarshal operation after the first error or fatal error is encountered.
  Calling this method with a null parameter will cause the Unmarshaller to revert back to the default event handler.
  
  Parameters:
  
  handler - the validation event handler
  
  Throws:
  
  JAXBException - if an error was encountered while setting the event handler
- getEventHandler
  
  ValidationEventHandler getEventHandler() throws JAXBException
  
  Return the current event handler or the default event handler if one hasn't been set.
  
  Returns:
  
  the current ValidationEventHandler or the default event handler if it hasn't been set
  
  Throws:
  
  JAXBException - if an error was encountered while getting the current event handler
- setProperty
  
  void setProperty(String name, Object value) throws PropertyException
  
  Set the particular property in the underlying implementation of Unmarshaller. This method can only be used to set one of the standard Jakarta XML Binding defined properties above or a provider specific property. Attempting to set an undefined property will result in a PropertyException being thrown. See Supported Properties.
  
  Parameters:
  
  name - the name of the property to be set. This value can either be specified using one of the constant fields or a user supplied string.
  
  value - the value of the property to be set
  
  Throws:
  
  PropertyException - when there is an error processing the given property or value
  
  IllegalArgumentException - If the name parameter is null
- getProperty
  
  Object getProperty(String name) throws PropertyException
  
  Get the particular property in the underlying implementation of Unmarshaller. This method can only be used to get one of the standard Jakarta XML Binding defined properties above or a provider specific property. Attempting to get an undefined property will result in a PropertyException being thrown. See Supported Properties.
  
  Parameters:
  
  name - the name of the property to retrieve
  
  Returns:
  
  the value of the requested property
  
  Throws:
  
  PropertyException - when there is an error retrieving the given property or value property name
  
  IllegalArgumentException - If the name parameter is null
- setSchema
  
  void setSchema(Schema schema)
  
  Specify the JAXP Schema object that should be used to validate subsequent unmarshal operations against. Passing null into this method will disable validation.
  Initially this property is set to null.
  
  Parameters:
  
  schema - Schema object to validate unmarshal operations against or null to disable validation
  
  Throws:
  
  UnsupportedOperationException - could be thrown if this method is invoked on an Unmarshaller created from a JAXBContext referencing JAXB 1.0 mapped classes
- getSchema
  
  Schema getSchema()
  
  Get the JAXP Schema object being used to perform unmarshal-time validation. If there is no Schema set on the unmarshaller, then this method will return null indicating that unmarshal-time validation will not be performed.
  
  Returns:
  
  the Schema object being used to perform unmarshal-time validation or null if not present
  
  Throws:
  
  UnsupportedOperationException - could be thrown if this method is invoked on an Unmarshaller created from a JAXBContext referencing JAXB 1.0 mapped classes
- setAdapter
  
  <A extends XmlAdapter<?, ?>> void setAdapter(A adapter)
  
  Associates a configured instance of XmlAdapter with this unmarshaller.
  This is a convenience method that invokes setAdapter(adapter.getClass(),adapter);.
  Type Parameters:
  
  A - the type of XmlAdapter
  
  Parameters:
  
  adapter - the configured instance of XmlAdapter
  
  Throws:
  
  IllegalArgumentException - if the adapter parameter is null.
  
  UnsupportedOperationException - if invoked against a JAXB 1.0 implementation.
  
  See Also:
  
  setAdapter(Class,XmlAdapter)
- setAdapter
  
  <A extends XmlAdapter<?, ?>> void setAdapter(Class<A> type, A adapter)
  
  Associates a configured instance of XmlAdapter with this unmarshaller.
  Every unmarshaller internally maintains a Map<Class,XmlAdapter>, which it uses for unmarshalling classes whose fields/methods are annotated with XmlJavaTypeAdapter.
  This method allows applications to use a configured instance of XmlAdapter. When an instance of an adapter is not given, an unmarshaller will create one by invoking its default constructor.
  
  Type Parameters:
  
  A - the type of the adapter
  
  Parameters:
  
  type - The type of the adapter. The specified instance will be used when XmlJavaTypeAdapter.value() refers to this type.
  
  adapter - The instance of the adapter to be used. If null, it will un-register the current adapter set for this type.
  
  Throws:
  
  IllegalArgumentException - if the type parameter is null.
  
  UnsupportedOperationException - if invoked against a JAXB 1.0 implementation.
- getAdapter
  
  <A extends XmlAdapter<?, ?>> A getAdapter(Class<A> type)
  
  Gets the adapter associated with the specified type. This is the reverse operation of the setAdapter(A) method.
  
  Type Parameters:
  
  A - the type of the adapter
  
  Parameters:
  
  type - The type of the adapter. The specified instance will be used when XmlJavaTypeAdapter.value() refers to this type.
  
  Returns:
  
  The adapter associated with the specified type.
  
  Throws:
  
  IllegalArgumentException - if the type parameter is null.
  
  UnsupportedOperationException - if invoked against a JAXB 1.0 implementation.
- setAttachmentUnmarshaller
  
  void setAttachmentUnmarshaller(AttachmentUnmarshaller au)
  
  Associate a context that resolves cid's, content-id URIs, to binary data passed as attachments. Unmarshal time validation, enabled via setSchema(Schema), must be supported even when unmarshaller is performing XOP processing.
  
  Parameters:
  
  au - the attachment unmarshaller to be set
  
  Throws:
  
  IllegalStateException - if attempt to concurrently call this method during an unmarshal operation.
- getAttachmentUnmarshaller
  
  AttachmentUnmarshaller getAttachmentUnmarshaller()
- setListener
  
  void setListener(Unmarshaller.Listener listener)
  
  Register unmarshal event callback Unmarshaller.Listener with this Unmarshaller.
  There is only one Listener per Unmarshaller. Setting a Listener replaces the previous set Listener. One can unregister current Listener by setting listener to null.
  
  Parameters:
  
  listener - provides unmarshal event callbacks for this Unmarshaller
- getListener
  
  Unmarshaller.Listener getListener()
  
  Return Unmarshaller.Listener registered with this Unmarshaller.
  
  Returns:
  
  registered Unmarshaller.Listener or null if no Listener is registered with this Unmarshaller.

JAXBElement Property	Value
name	`xml element name`
value	`instanceof declaredType`
declaredType	unmarshal method `declaredType` parameter
scope	`null` (actual scope is unknown)

Interface Unmarshaller

Nested Class Summary

Method Summary

Method Details

unmarshal

unmarshal

unmarshal

unmarshal

unmarshal

unmarshal

unmarshal

unmarshal

unmarshal

unmarshal

unmarshal

unmarshal

unmarshal

getUnmarshallerHandler

setEventHandler

getEventHandler

setProperty

getProperty

setSchema

getSchema

setAdapter

setAdapter

getAdapter

setAttachmentUnmarshaller

getAttachmentUnmarshaller

setListener

getListener