com.saxonica.ee.stream.feed

Class SimpleContentFeed

java.lang.Object

com.saxonica.ee.stream.feed.ItemFeed

com.saxonica.ee.stream.feed.AbsorptionFeed

com.saxonica.ee.stream.feed.SimpleContentFeed

All Implemented Interfaces:

Feed

public class SimpleContentFeed
extends AbsorptionFeed

This class is used when a streaming template requests evaluation of a simple content constructor in streaming mode (that is, when it constructs a text, attribute, comment, or PI node based on the contents of the streamed document).

The result of this Watch is a single string, constructed using the rules of "Constructing Simple Content" in the XSLT specification.

The AdjacentTextNodeMergerFeed is used when the node is constructed as a result of a computation on the streamed data, for example xsl:value-of select="distinct-values(.//@price)". By contrast, a SimpleContentWatch is used when the streamed nodes are selected directly, for example xsl:value-of select=".//@price".

Both a Feed and a Watch are needed because a simple content constructor operates on a sequence of nodes without simply atomizing the sequence.

Nested Class Summary

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

AbsorptionFeed.PendingItem

Constructor Summary

Constructors

Constructor and Description
SimpleContentFeed(Feed result)

Method Summary

Modifier and Type	Method and Description
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

close, 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

SimpleContentFeed

public SimpleContentFeed(Feed result)

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