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java.lang.Object com.saxonica.stream.feed.ItemFeed com.saxonica.stream.feed.SimpleNodeConstructorFeed
public class SimpleNodeConstructorFeed
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 SimpleContentFeed 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.
Constructor Summary | |
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SimpleNodeConstructorFeed(Expression expr,
Feed result,
Stack<XPathContext> contextStack)
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Method Summary | |
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void |
append(Item item)
Supply an item to the feed |
void |
close()
Finish evaluating the expression. |
void |
open()
Start evaluating the expression. |
Methods inherited from class com.saxonica.stream.feed.ItemFeed |
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getContext, getContextStack, getExpression, getPipelineConfiguration, getResult, setPipelineConfiguration |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public SimpleNodeConstructorFeed(Expression expr, Feed result, Stack<XPathContext> contextStack)
Method Detail |
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public void open() throws XPathException
ItemFeed
open
in interface Feed
open
in class ItemFeed
XPathException
- if a dynamic error occurspublic void close() throws XPathException
ItemFeed
close
in interface Feed
close
in class ItemFeed
XPathException
- if a dynamic error occurspublic void append(Item item) throws XPathException
append
in interface Feed
append
in class ItemFeed
item
- the item being fed
XPathException
- to report any failure
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