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See:
Description
Interface Summary | |
---|---|
Feed | A Feed is a SequenceReceiver that accepts a sequence of items in composed form: it rejects events such as startElement and endElement that represent "decomposed" nodes in the data model. |
FeedMaker | An expression that can be evaluated in streaming mode is represented at compile time by a list of FeedMaker objects. |
Class Summary | |
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AdjacentTextNodeMergerFeed | 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). |
AtomizerFeed | This class is used when a streaming template requests atomization of nodes that don't come directly from the streamed document, but rather are constructed in the course of the push pipeline |
AvgFeed | This class computes the result of the avg() function in push streaming mode |
BufferingFeed | A BufferingFeed is used to wrap an expression that does not have intrinsic capability to accept streamed input. |
CardinalityCheckingFeed | A Feed which checks the cardinality of the streamed sequence of items. |
ComplexNodeEventFeed | This event feed supports instructions that create a document or element node. |
CountFeed | This class is used when counting items (other than nodes delivered by a Watch) |
DecomposingFeed | Appends the output of an ItemFeed to a SequenceReceiver |
DistinctValuesFeed | This class is used when a streaming template requests evaluation of the distinct-values() of the nodes selected by a path expression |
EmptyTextNodeRemoverFeed | 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). |
EventFeed | An EventFeed evaluates an expression in "decomposed push" mode. |
EventFeedMaker | Abstract FeedMaker acting for an Expression class that prefers to output decomposed events |
FilterExpressionFeed | This class is used when a streaming template requests filtering of items that don't come directly from the streamed document, but rather are constructed in the course of the push pipeline |
ForEachFeed | This class is used when a streaming template applies xsl:for-each to items that don't come directly from the streamed document, but rather are constructed in the course of the push pipeline |
GeneralComparisonFeed | This class is used when a streaming template requests a general comparison with one operand being pushed from the streamed input document |
ItemFeed | An ItemFeed evaluates an expression in "composed push" mode. |
ItemFeedMaker | Abstract FeedMaker acting for an Expression class that prefers to output composed items |
ItemMappingFeed | A Feed which applies an DummyItemMappingFunction to each supplied item. |
MinimaxFeed | This class is used when a streaming template requests evaluation of the sum() of the nodes selected by a path expression |
NextIterationFeed | This class is used when one of the xsl:with-param elements within an xsl:next-iteration of an xsl:iterate consumes the streamed input |
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). |
StringJoinFeed | This class is used when a streamed template requests evaluation of the string-join function streamed with respect to its first argument |
SumFeed | This class is used when a streaming template requests evaluation of the sum() of the nodes selected by a path expression, with the streamed input being the value of the first argument. |
WithParamFeed | A WithParamFeed is used to handle a WithParam element (for example, in xsl:next-iteration) whose select expression is evaluated in push mode. |
This package contains classes used to support streaming. For many kinds of expression
that support streaming, there is a Feed
class in this
package that evaluates the expression in composed push mode, one item at a time.
None of these classes will be used directly by typical user applications.
These classes generally implement the interface ItemFeed
,
whose main methods are open()
, append(item)
, and close()
.
These methods are called to supply the sequence of items representing the streamed operand of the
expression. The feed class can either deliver the result incrementally during calls of the
append(item)
method, or it can deliver the entire result during the close()
method. (It is the responsibility of the class, however, to minimize the amount of data that it buffers).
The Feed
class for evaluating an expression is created by calling the FeedMaker
,
which in turn is returned by the streaming adjunct class for the particular kind of expression.
Michael H. Kay
Saxonica Limited
30 July 2010
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