net.sf.saxon.s9api
Class DocumentBuilder

java.lang.Object
  net.sf.saxon.s9api.DocumentBuilder

public class DocumentBuilder
extends Object

A document builder holds properties controlling how a Saxon document tree should be built, and provides methods to invoke the tree construction.

This class has no public constructor. Users should construct a DocumentBuilder by calling the factory method Processor.newDocumentBuilder().

All documents used in a single Saxon query, transformation, or validation episode must be built with the same Configuration. However, there is no requirement that they should use the same DocumentBuilder.

Since:

9.0

Method Summary

XdmNode	build(File file) Build a document from a supplied XML file
XdmNode	build(Source source) Load an XML document, to create a tree representation of the document in memory.
URI	getBaseURI() Get the base URI of documents loaded using this DocumentBuilder when no other URI is available.
SchemaValidator	getSchemaValidator() Get the SchemaValidator used to validate documents loaded using this DocumentBuilder.
WhitespaceStrippingPolicy	getWhitespaceStrippingPolicy() Get the white whitespace stripping policy applied when loading a document using this DocumentBuilder.
boolean	isDTDValidation() Ask whether DTD validation is to be applied to documents loaded using this DocumentBuilder
boolean	isLineNumbering() Ask whether line numbering is enabled for documents loaded using this DocumentBuilder.
boolean	isRetainPSVI() Ask whether the constructed tree should contain information derived from schema validation, specifically whether it should contain type annotations and expanded defaults of missing element and attribute content.
void	setBaseURI(URI uri) Set the base URI of a document loaded using this DocumentBuilder.
void	setDTDValidation(boolean option) Set whether DTD validation should be applied to documents loaded using this DocumentBuilder.
void	setLineNumbering(boolean option) Set whether line numbering is to be enabled for documents constructed using this DocumentBuilder.
void	setRetainPSVI(boolean retainPSVI) Set whether the constructed tree should contain information derived from schema validation, specifically whether it should contain type annotations and expanded defaults of missing element and attribute content.
void	setSchemaValidator(SchemaValidator validator) Set the schemaValidator to be used.
void	setWhitespaceStrippingPolicy(WhitespaceStrippingPolicy policy) Set the whitespace stripping policy applied when loading a document using this DocumentBuilder.
XdmNode	wrap(Object node) Create a node by wrapping a recognized external node from a supported object model.

Methods inherited from class java.lang.Object

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

Method Detail

setLineNumbering

public void setLineNumbering(boolean option)

Set whether line numbering is to be enabled for documents constructed using this DocumentBuilder. This has the effect that the line number in the original source document is maintained in the constructed tree, for each element node (and only for elements). The line number in question is generally the line number on which the closing ">" of the element start tag appears.

By default, line numbers are not maintained.

Errors relating to document parsing and validation will generally contain line numbers whether or not this option is set, because such errors are detected during document construction.

Line numbering is not available for all kinds of source: for example, it is not available when loading from an existing DOM Document.

The resulting line numbers are accessible to applications using the XPath extension function saxon:line-number() applied to a node, or using the Java method NodeInfo.getLineNumber()

Line numbers are maintained only for element nodes; the line number returned for any other node will be that of the most recent element. For an element node, the line number is generally that of the closing angle bracket at the end of the start tag (this is what a SAX parser notifies)

Parameters:

option - true if line numbers are to be maintained, false otherwise.

isLineNumbering

public boolean isLineNumbering()

Ask whether line numbering is enabled for documents loaded using this DocumentBuilder.

By default, line numbering is disabled.

Line numbering is not available for all kinds of source: in particular, it is not available when loading from an existing XmlDocument.

The resulting line numbers are accessible to applications using the extension function saxon:line-number() applied to a node, or using the Java method NodeInfo.getLineNumber()

Line numbers are maintained only for element nodes; the line number returned for any other node will be that of the most recent element. For an element node, the line number is generally that of the closing angle bracket at the end of the start tag (this is what a SAX parser notifies)

Returns:

true if line numbering is enabled

setSchemaValidator

public void setSchemaValidator(SchemaValidator validator)

Set the schemaValidator to be used. This determines whether schema validation is applied to an input document and whether type annotations in a supplied document are retained. If no schemaValidator is supplied, then schema validation does not take place.

This option requires the schema-aware version of the Saxon product (Saxon-SA).

Parameters:

validator - the SchemaValidator to be used

getSchemaValidator

public SchemaValidator getSchemaValidator()

Get the SchemaValidator used to validate documents loaded using this DocumentBuilder.

Returns:

the SchemaValidator if one has been set; otherwise null.

setRetainPSVI

public void setRetainPSVI(boolean retainPSVI)

Set whether the constructed tree should contain information derived from schema validation, specifically whether it should contain type annotations and expanded defaults of missing element and attribute content. If no schema validator is set then this option has no effect. The default value is true.

Not yet implemented.

Parameters:

retainPSVI - if true, the constructed tree will contain type annotations and expanded defaults of missing element and attribute content. If false, the tree that is returned will be the same as if schema validation did not take place (except that if the document is invalid, no tree will be constructed)

isRetainPSVI

public boolean isRetainPSVI()

Ask whether the constructed tree should contain information derived from schema validation, specifically whether it should contain type annotations and expanded defaults of missing element and attribute content. If no schema validator is set then this option has no effect.

Not yet implemented.

Returns:

true, if the constructed tree will contain type annotations and expanded defaults of missing element and attribute content. Return false, if the tree that is returned will be the same as if schema validation did not take place (except that if the document is invalid, no tree will be constructed)

setDTDValidation

public void setDTDValidation(boolean option)

Set whether DTD validation should be applied to documents loaded using this DocumentBuilder.

By default, no DTD validation takes place.

Parameters:

option - true if DTD validation is to be applied to the document

isDTDValidation

public boolean isDTDValidation()

Ask whether DTD validation is to be applied to documents loaded using this DocumentBuilder

Returns:

true if DTD validation is to be applied

setWhitespaceStrippingPolicy

public void setWhitespaceStrippingPolicy(WhitespaceStrippingPolicy policy)

Set the whitespace stripping policy applied when loading a document using this DocumentBuilder.

By default, whitespace text nodes appearing in element-only content are stripped, and all other whitespace text nodes are retained.

Parameters:

policy - the policy for stripping whitespace-only text nodes from source documents

getWhitespaceStrippingPolicy

public WhitespaceStrippingPolicy getWhitespaceStrippingPolicy()

Get the white whitespace stripping policy applied when loading a document using this DocumentBuilder.

Returns:

the policy for stripping whitespace-only text nodes

setBaseURI

public void setBaseURI(URI uri)

Set the base URI of a document loaded using this DocumentBuilder.

This is used for resolving any relative URIs appearing within the document, for example in references to DTDs and external entities.

This information is required when the document is loaded from a source that does not provide an intrinsic URI, notably when loading from a Stream or a DOMSource. The value is ignored when loading from a source that does have an intrinsic base URI.

Parameters:

uri - the base URI of documents loaded using this DocumentBuilder. This must be an absolute URI.

getBaseURI

public URI getBaseURI()

Get the base URI of documents loaded using this DocumentBuilder when no other URI is available.

Returns:

the base URI to be used, or null if no value has been set.

build

public XdmNode build(Source source)
              throws SaxonApiException

Load an XML document, to create a tree representation of the document in memory.

Parameters:

source - A JAXP Source object identifying the source of the document. This can always be a StreamSource or a SAXSource.

An instance of DOMSource is accepted provided that the Saxon support code for DOM (in saxon9-dom.jar) is on the classpath.

If the source is an instance of NodeInfo then the subtree rooted at this node will be copied (applying schema validation if requested) to create a new tree.

Saxon also accepts an instance of PullSource, which can be used to supply a document that is to be parsed using a StAX parser.

Returns:

An XdmNode. This will be the document node at the root of the tree of the resulting in-memory document.

Throws:

SaxonApiException

build

public XdmNode build(File file)
              throws SaxonApiException

Build a document from a supplied XML file

Parameters:

file - the supplied file

Returns:

the XdmNode representing the root of the document tree

Throws:

SaxonApiException - if any failure occurs retrieving or parsing the document

wrap

public XdmNode wrap(Object node)
             throws IllegalArgumentException

Create a node by wrapping a recognized external node from a supported object model. The support module for the external object model must be on the class path and registered with the Saxon configuration.

Parameters:

node - the document node of the external tree representation

Returns:

the document node as an XdmNode

Throws:

IllegalArgumentException - if the type of object supplied is not recognized. This may be because the required code is not on the class path