com.saxonica.ee.stream.feed

Class StringValueFeed

java.lang.Object

com.saxonica.ee.stream.feed.ItemFeed

com.saxonica.ee.stream.feed.AbsorptionFeed

com.saxonica.ee.stream.feed.StringValueFeed

All Implemented Interfaces:

Feed

public class StringValueFeed
extends AbsorptionFeed

This class is used when a streamed template requests evaluation of the string value of the nodes selected by a path expression, typically in response to an xsl:value-of instruction. The expression delivers a sequence of strings, one for each selected node.

Nested Class Summary

Nested classes/interfaces inherited from class com.saxonica.ee.stream.feed.AbsorptionFeed

AbsorptionFeed.PendingItem

Constructor Summary

Constructors

Constructor and Description
StringValueFeed(Feed result, XPathContext context)

Method Summary

Modifier and Type	Method and Description
void	close() The close() method is called immediately before the Watch is destroyed, that is, when the element whose declaration scopes the constraint implemented by this Watch goes out of scope.
protected AbsorptionFeed.PendingItem	makePendingItem(int sequenceNr, FleetingParentNode node) Create a pending item (appropriate to the subclass) containing the data needed to compute the result value for one node in the streamed input sequence
protected Sequence	processGroundedItem(Item item) Process a grounded item in the input sequence: either a streamed leaf node such as an attribute or text node, or an atomic value, or a non-streamed element or document node injected into the sequence for example by use of the comma operator.

Methods inherited from class com.saxonica.ee.stream.feed.AbsorptionFeed

endSelectedParentNode, processItem, setHasFailed, startSelectedParentNode

Methods inherited from class com.saxonica.ee.stream.feed.ItemFeed

dynamicError, getContext, getExpression, getPipelineConfiguration, getReceiver, getResult, getTerminator, hasFailed, open, processItems, setExpression, setPipelineConfiguration, setTerminator

Methods inherited from class java.lang.Object

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

Constructor Detail

StringValueFeed

public StringValueFeed(Feed result,
                       XPathContext context)

Method Detail

makePendingItem

protected AbsorptionFeed.PendingItem makePendingItem(int sequenceNr,
                                                     FleetingParentNode node)

Description copied from class: AbsorptionFeed

Create a pending item (appropriate to the subclass) containing the data needed to compute the result value for one node in the streamed input sequence

Specified by:

makePendingItem in class AbsorptionFeed

Parameters:

sequenceNr - the sequence number of this node within a set of nested nodes

node - the streamed input node

Returns:

the data needed to process this node

processGroundedItem

protected Sequence processGroundedItem(Item item)
                                throws XPathException

Description copied from class: AbsorptionFeed

Process a grounded item in the input sequence: either a streamed leaf node such as an attribute or text node, or an atomic value, or a non-streamed element or document node injected into the sequence for example by use of the comma operator.

Specified by:

processGroundedItem in class AbsorptionFeed

Parameters:

item - the grounded item

Returns:

the result of processing the grounded item

Throws:

XPathException - if a dynamic error occurs

close

public void close()
           throws XPathException

The close() method is called immediately before the Watch is destroyed, that is, when the element whose declaration scopes the constraint implemented by this Watch goes out of scope.

Specified by:

close in interface Feed

Overrides:

close in class ItemFeed

Throws:

XPathException - May be raised if a dynamic error occurs