Package net.sf.saxon.dom4j
Class DOM4JObjectModel
java.lang.Object
net.sf.saxon.dom4j.DOM4JObjectModel
- All Implemented Interfaces:
Serializable
,ExternalObjectModel
This class is the DOM4J implementation of Saxon's ExternalObjectModel interface; it supports
the wrapping of DOM4J documents as instances of the Saxon NodeInfo interface.
- See Also:
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionconvertObjectToXPathValue
(Object object, Configuration config) Convert a Java object to an XPath value.convertXPathValueToObject
(Value value, Object targetClass, XPathContext context) Convert an XPath value to an object in this object model.getDocumentBuilder
(Result result) Test whether this object model recognizes a particular kind of JAXP Result object, and if it does, return a Receiver that builds an instance of this data model from a sequence of events.Get the URI of the external object model as used in the JAXP factory interfaces for obtaining an XPath implementationgetJPConverter
(Class targetClass) Get a converter from XPath values to values in the external object modelgetNodeListCreator
(Object node) Get a converter that converts a sequence of XPath nodes to this model's representation of a node list.getPJConverter
(Class targetClass) Get a converter from XPath values to values in the external object modelboolean
isRecognizedNode
(Object object) Test whether this object model recognizes a given node as one of its ownboolean
isRecognizedNodeListClass
(Class nodeClass) Test whether this object model recognizes a given class as representing a list of nodes in that object model.boolean
sendSource
(Source source, Receiver receiver, PipelineConfiguration pipe) Test whether this object model recognizes a particular kind of JAXP Source object, and if it does, send the contents of the document to a supplied Receiver, and return true.unravel
(Source source, Configuration config) Wrap or unwrap a node using this object model to return the corresponding Saxon node.wrapDocument
(Object node, String baseURI, Configuration config) Wrap a document node in the external object model in a document wrapper that implements the Saxon DocumentInfo interfacewrapNode
(DocumentInfo document, Object node) Wrap a node within the external object model in a node wrapper that implements the Saxon VirtualNode interface (which is an extension of NodeInfo)
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Constructor Details
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DOM4JObjectModel
public DOM4JObjectModel()
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Method Details
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getIdentifyingURI
Get the URI of the external object model as used in the JAXP factory interfaces for obtaining an XPath implementation- Specified by:
getIdentifyingURI
in interfaceExternalObjectModel
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getPJConverter
Description copied from interface:ExternalObjectModel
Get a converter from XPath values to values in the external object model- Specified by:
getPJConverter
in interfaceExternalObjectModel
- Parameters:
targetClass
- the required class of the result of the conversion. If this class represents a node or list of nodes in the external object model, the method should return a converter that takes a native node or sequence of nodes as input and returns a node or sequence of nodes in the external object model representation. Otherwise, it should return null.- Returns:
- a converter, if the targetClass is recognized as belonging to this object model; otherwise null
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getJPConverter
Description copied from interface:ExternalObjectModel
Get a converter from XPath values to values in the external object model- Specified by:
getJPConverter
in interfaceExternalObjectModel
- Parameters:
targetClass
- the required class of the result of the conversion. If this class represents a node or list of nodes in the external object model, the method should return a converter that takes an object of this class as input and returns a node or sequence of nodes in the native Saxon representation. Otherwise, it should return null.- Returns:
- a converter, if the targetClass is recognized as belonging to this object model; otherwise null
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getNodeListCreator
Get a converter that converts a sequence of XPath nodes to this model's representation of a node list.- Specified by:
getNodeListCreator
in interfaceExternalObjectModel
- Parameters:
node
- an example of the kind of node used in this model- Returns:
- if the model does not recognize this node as one of its own, return null. Otherwise return a PJConverter that takes a list of XPath nodes (represented as NodeInfo objects) and returns a collection of nodes in this object model
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isRecognizedNode
Test whether this object model recognizes a given node as one of its own -
isRecognizedNodeListClass
Test whether this object model recognizes a given class as representing a list of nodes in that object model. This method will generally be called at compile time.- Parameters:
nodeClass
- A class that possibly represents nodes- Returns:
- true if the class is used to represent nodes in this object model
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getDocumentBuilder
Test whether this object model recognizes a particular kind of JAXP Result object, and if it does, return a Receiver that builds an instance of this data model from a sequence of events. If the Result is not recognised, return null.- Specified by:
getDocumentBuilder
in interfaceExternalObjectModel
- Parameters:
result
- a JAXP result object- Returns:
- a Receiver that writes to that result, if available; or null otherwise
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sendSource
public boolean sendSource(Source source, Receiver receiver, PipelineConfiguration pipe) throws XPathException Test whether this object model recognizes a particular kind of JAXP Source object, and if it does, send the contents of the document to a supplied Receiver, and return true. Otherwise, return false.- Specified by:
sendSource
in interfaceExternalObjectModel
- Parameters:
source
- a JAXP Source objectreceiver
- the Receiver that is to receive the data from the Sourcepipe
- configuration information- Returns:
- true if the data from the Source has been sent to the Receiver, false otherwise
- Throws:
XPathException
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unravel
Wrap or unwrap a node using this object model to return the corresponding Saxon node. If the supplied source does not belong to this object model, return null- Specified by:
unravel
in interfaceExternalObjectModel
- Parameters:
source
- a JAXP Source objectconfig
- the Saxon configuration- Returns:
- a NodeInfo corresponding to the Source, if this can be constructed; otherwise null
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convertObjectToXPathValue
public ValueRepresentation convertObjectToXPathValue(Object object, Configuration config) throws XPathException Convert a Java object to an XPath value. If the supplied object is recognized as a representation of a value using this object model, the object model should convert the value to an XPath value and return this as the result. If not, it should return null. If the object is recognized but cannot be converted, an exception should be thrown- Throws:
XPathException
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convertXPathValueToObject
Convert an XPath value to an object in this object model. If the supplied value can be converted to an object in this model, of the specified class, then the conversion should be done and the resulting object returned. If the value cannot be converted, the method should return null. Note that the supplied class might be a List, in which case the method should inspect the contents of the Value to see whether they belong to this object model. -
wrapDocument
Wrap a document node in the external object model in a document wrapper that implements the Saxon DocumentInfo interface- Parameters:
node
- a node (any node) in the third party documentbaseURI
- the base URI of the node (supply "" if unknown)config
- the Saxon configuration (which among other things provides access to the NamePool)- Returns:
- the wrapper, which must implement DocumentInfo
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wrapNode
Wrap a node within the external object model in a node wrapper that implements the Saxon VirtualNode interface (which is an extension of NodeInfo)- Parameters:
document
- the document wrapper, as a DocumentInfo objectnode
- the node to be wrapped. This must be a node within the document wrapped by the DocumentInfo provided in the first argument- Returns:
- the wrapper for the node, as an instance of VirtualNode
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