org.dom4j.jaxb

Class JAXBReader

java.lang.Object

org.dom4j.jaxb.JAXBReader

public class JAXBReader
extends Object

Reads an XML document and creates a DOM4J tree from SAX parsing events. JAXBObjectHandlerobjects can be registered to automatically receive unmarshalled XML fragments. Registered ElementHandler implementations are notified when a certain element path is encountered

Author:

Wonne Keysers (Realsoftware.be)

See Also:

SAXReader, JAXBContext

Constructor Summary

Constructors

Constructor and Description
JAXBReader(String contextPath) Creates a new JAXBReader for the given JAXB context path.
JAXBReader(String contextPath, ClassLoader classloader) Creates a new JAXBReader for the given JAXB context path, using the specified ClassLoader.

Method Summary

Modifier and Type	Method and Description
void	addHandler(String path, ElementHandler handler) Adds the ElementHandler to be called when the specified path is encounted.
void	addObjectHandler(String path, JAXBObjectHandler handler) Registers a JAXBObjectHandlerthat will be supplied with the unmarshalled representation of the xml fragment whenever the specified path is encounted.
boolean	isPruneElements() When 'true', the DOM4J document will not be kept in memory while parsing.
protected Element	marshal(Element element) Marshals the given Elementin to its DOM4J counterpart.
Document	read(File source) Parses the specified File
Document	read(File file, Charset charset) Parses the specified File, using the given Charset.
Document	read(InputSource source) Parses the specified InputSource
Document	read(InputStream source) Parses the specified InputStream
Document	read(InputStream source, String systemId) Parses the specified InputStream
Document	read(Reader source) Parses the specified Reader
Document	read(Reader source, String systemId) Parses the specified Reader
Document	read(String source) Parses the the given URL or filename.
Document	read(URL source) Parses the the given URL.
void	removeHandler(String path) Removes the ElementHandler from the event based processor, for the specified path.
void	removeObjectHandler(String path) Removes the JAXBObjectHandlerfrom the event based processor, for the specified element path.
void	resetHandlers() Removes all registered JAXBObjectHandlerand ElementHandler instances from the event based processor.
void	setPruneElements(boolean pruneElements) Set to true when DOM4J elements must immediately be pruned from the tree.
protected Element	unmarshal(Element element) Unmarshalls the specified DOM4J Elementinto a Element

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JAXBReader

public JAXBReader(String contextPath)

Creates a new JAXBReader for the given JAXB context path. This is the Java package where JAXB can find the generated XML classes. This package MUST contain jaxb.properties!

Parameters:

contextPath - context path to be used

See Also:

JAXBContext

JAXBReader

public JAXBReader(String contextPath,
                  ClassLoader classloader)

Creates a new JAXBReader for the given JAXB context path, using the specified ClassLoader. This is the Java package where JAXB can find the generated XML classes. This package MUST contain jaxb.properties!

Parameters:

contextPath - to be used

classloader - to be used

See Also:

JAXBContext

Method Detail

read

public Document read(File source)
              throws DocumentException

Parses the specified File

Parameters:

source - the file to parse

Returns:

the resulting DOM4J document

Throws:

DocumentException - when an error occurs while parsing

read

public Document read(File file,
                     Charset charset)
              throws DocumentException

Parses the specified File, using the given Charset.

Parameters:

file - the file to parse

charset - the charset to be used

Returns:

the resulting DOM4J document

Throws:

DocumentException - when an error occurs while parsing

read

public Document read(InputSource source)
              throws DocumentException

Parses the specified InputSource

Parameters:

source - the source to parse

Returns:

the resulting DOM4J document

Throws:

DocumentException - when an error occurs while parsing

read

public Document read(InputStream source)
              throws DocumentException

Parses the specified InputStream

Parameters:

source - the input stream to parse

Returns:

the resulting DOM4J document

Throws:

DocumentException - when an error occurs while parsing

read

public Document read(InputStream source,
                     String systemId)
              throws DocumentException

Parses the specified InputStream

Parameters:

source - the input stream to parse

systemId - is the URI for the input

Returns:

the resulting DOM4J document

Throws:

DocumentException - when an error occurs while parsing

read

public Document read(Reader source)
              throws DocumentException

Parses the specified Reader

Parameters:

source - the input reader to use

Returns:

the resulting DOM4J document

Throws:

DocumentException - when an error occurs while parsing

read

public Document read(Reader source,
                     String systemId)
              throws DocumentException

Parses the specified Reader

Parameters:

source - the input reader to parse

systemId - is the URI for the input

Returns:

the resulting DOM4J document

Throws:

DocumentException - when an error occurs while parsing

read

public Document read(String source)
              throws DocumentException

Parses the the given URL or filename.

Parameters:

source - the location to parse

Returns:

the resulting DOM4J document

Throws:

DocumentException - when an error occurs while parsing

read

public Document read(URL source)
              throws DocumentException

Parses the the given URL.

Parameters:

source - the URL to parse

Returns:

the resulting DOM4J document

Throws:

DocumentException - when an error occurs while parsing

addObjectHandler

public void addObjectHandler(String path,
                             JAXBObjectHandler handler)

Registers a JAXBObjectHandlerthat will be supplied with the unmarshalled representation of the xml fragment whenever the specified path is encounted.

Parameters:

path - the path to listen for

handler - the handler to be notified

removeObjectHandler

public void removeObjectHandler(String path)

Removes the JAXBObjectHandlerfrom the event based processor, for the specified element path.

Parameters:

path - The path to remove the JAXBObjectHandlerfor

addHandler

public void addHandler(String path,
                       ElementHandler handler)

Adds the ElementHandler to be called when the specified path is encounted.

Parameters:

path - is the path to be handled

handler - is the ElementHandler to be called by the event based processor.

removeHandler

public void removeHandler(String path)

Removes the ElementHandler from the event based processor, for the specified path.

Parameters:

path - is the path to remove the ElementHandler for.

resetHandlers

public void resetHandlers()

Removes all registered JAXBObjectHandlerand ElementHandler instances from the event based processor.

isPruneElements

public boolean isPruneElements()

When 'true', the DOM4J document will not be kept in memory while parsing.

Returns:

Returns the pruneElements.

setPruneElements

public void setPruneElements(boolean pruneElements)

Set to true when DOM4J elements must immediately be pruned from the tree. The Documentwill not be available afterwards!

Parameters:

pruneElements - DOCUMENT ME!

marshal

protected Element marshal(Element element)
                   throws JAXBException

Marshals the given Elementin to its DOM4J counterpart.

Parameters:

element - JAXB Element to be marshalled

Returns:

the marshalled DOM4J Element

Throws:

JAXBException - when an error occurs

unmarshal

protected Element unmarshal(Element element)
                     throws JAXBException

Unmarshalls the specified DOM4J Elementinto a Element

Parameters:

element - the DOM4J element to unmarshall

Returns:

the unmarshalled JAXB object

Throws:

JAXBException - when an error occurs