Package net.sf.saxon.event
Class NamespaceReducer
java.lang.Object
net.sf.saxon.event.SequenceReceiver
net.sf.saxon.event.ProxyReceiver
net.sf.saxon.event.NamespaceReducer
- All Implemented Interfaces:
Result
,Receiver
,NamespaceResolver
NamespaceReducer
is a ProxyReceiver
responsible for removing duplicate namespace
declarations. It also ensures that an xmlns=""
undeclaration is output when
necessary. Used on its own, the NamespaceReducer
simply eliminates unwanted
namespace declarations. It can also be subclassed, in which case the subclass
can use the services of the NamespaceReducer
to resolve QNames.
The NamespaceReducer
also validates namespace-sensitive content.
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Field Summary
Fields inherited from class net.sf.saxon.event.ProxyReceiver
nextReceiver
Fields inherited from class net.sf.saxon.event.SequenceReceiver
pipelineConfiguration, previousAtomic, systemId
Fields inherited from interface javax.xml.transform.Result
PI_DISABLE_OUTPUT_ESCAPING, PI_ENABLE_OUTPUT_ESCAPING
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
endElement: Discard the namespaces declared on this element.getURIForPrefix
(String prefix, boolean useDefault) Get the namespace URI corresponding to a given prefix.boolean
Ask whether the namespace reducer is disinheriting namespaces at the current levelGet an iterator over all the prefixes declared in this namespace context.void
startElement
(NodeName elemName, SchemaType type, AttributeMap attributes, NamespaceMap namespaceMap, Location location, int properties) startElement.Methods inherited from class net.sf.saxon.event.ProxyReceiver
append, characters, close, comment, endDocument, getNamePool, getNextReceiver, open, processingInstruction, setPipelineConfiguration, setSystemId, setUnderlyingReceiver, setUnparsedEntity, startDocument, usesTypeAnnotations
Methods inherited from class net.sf.saxon.event.SequenceReceiver
append, decompose, flatten, getConfiguration, getErrorCodeForDecomposingFunctionItems, getPipelineConfiguration, getSystemId, handlesAppend
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Constructor Details
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NamespaceReducer
Create a NamespaceReducer- Parameters:
next
- the Receiver to which events will be passed after namespace reduction
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Method Details
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startElement
public void startElement(NodeName elemName, SchemaType type, AttributeMap attributes, NamespaceMap namespaceMap, Location location, int properties) throws XPathException startElement. This call removes redundant namespace declarations, and possibly adds an xmlns="" undeclaration.- Specified by:
startElement
in interfaceReceiver
- Overrides:
startElement
in classProxyReceiver
- Parameters:
elemName
- the name of the element.type
- the type annotation of the element.attributes
- the attributes of this elementnamespaceMap
- the in-scope namespaces of this element: generally this is all the in-scope namespaces, without relying on inheriting namespaces from parent elementslocation
- an object providing information about the module, line, and column where the node originatedproperties
- bit-significant properties of the element node. If there are no relevant properties, zero is supplied. The definitions of the bits are in classReceiverOption
- Throws:
XPathException
- if an error occurs
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isDisinheritingNamespaces
public boolean isDisinheritingNamespaces()Ask whether the namespace reducer is disinheriting namespaces at the current level- Returns:
- true if namespaces are being disinherited
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endElement
endElement: Discard the namespaces declared on this element.- Specified by:
endElement
in interfaceReceiver
- Overrides:
endElement
in classProxyReceiver
- Throws:
XPathException
- if an error occurs
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getURIForPrefix
Get the namespace URI corresponding to a given prefix. Return null if the prefix is not in scope.- Specified by:
getURIForPrefix
in interfaceNamespaceResolver
- Parameters:
prefix
- the namespace prefixuseDefault
- true if the default namespace is to be used when the prefix is ""- Returns:
- the uri for the namespace, or null if the prefix is not in scope
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iteratePrefixes
Get an iterator over all the prefixes declared in this namespace context. This will include the default namespace (prefix="") and the XML namespace where appropriate- Specified by:
iteratePrefixes
in interfaceNamespaceResolver
- Returns:
- an iterator over all the prefixes for which a namespace binding exists, including the zero-length string to represent the null/absent prefix if it is bound
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