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java.lang.Object | +--net.sf.saxon.value.Value | +--net.sf.saxon.value.SequenceValue | +--net.sf.saxon.value.SequenceIntent
A SequenceIntent is sequence value that uses deferred evaluation. It can be used as a value, but it is actually a wrapper around an iterator and a context, so the items in the sequence are not evaluated until they are required.
Constructor Summary | |
SequenceIntent(SequenceIterator iterator)
Construct a SequenceIntent by supplying an iterator. |
Method Summary | |
ItemType |
getItemType()
Get the item type |
Item |
itemAt(int n)
Get the n'th item in the sequence (starting from 0). |
SequenceIterator |
iterate(XPathContext context)
Evaluate the expression in a given context to return a sequence |
Methods inherited from class net.sf.saxon.value.SequenceValue |
conversionPreference, convertToJava, display, effectiveBooleanValue, evaluateAsString, evaluateItem, getCardinality, nodeToJavaPreference |
Methods inherited from class net.sf.saxon.value.Value |
analyze, asItem, asValue, collapseWhitespace, getDependencies, getSpecialProperties, getSubExpressions, inverse, normalizeWhitespace, promote, simplify, stringToInteger, stringToNumber, trimWhitespace |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public SequenceIntent(SequenceIterator iterator)
iterator
- the iterator that delivers the items in the sequence. It must deliver
them in the correct order, with no duplicates.Method Detail |
public ItemType getItemType()
getItemType
in interface Expression
getItemType
in class SequenceValue
public SequenceIterator iterate(XPathContext context) throws XPathException
context
- the evaluation context.
XPathException
- if any dynamic error occurs evaluating the
expressionpublic Item itemAt(int n) throws XPathException
itemAt
in class SequenceValue
XPathException
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