com.saxonica.extra
Class IndexedSequence

java.lang.Object
  com.saxonica.extra.IndexedSequence

All Implemented Interfaces:

java.io.Serializable

public class IndexedSequence

extends java.lang.Object

implements java.io.Serializable

This class represents a sequence (of nodes or atomic values) that can be accessed either in the same way as any other sequence, or via an index. An expression is provided to calculate the index values for each item in the sequence. Each item in the sequence is indexed on each of the atomic values that results from atomizing the result of this expression, when evaluated with that item as the context item.

See Also:

Serialized Form

Constructor Summary

IndexedSequence(Value sequence, Expression key, java.util.Comparator collator, XPathContext context)
Construct an indexed sequence

Method Summary

SequenceIterator	find(AtomicValue value) Get an iterator over the items with a given key value
Value	getSequence() Get the entire sequence

Methods inherited from class java.lang.Object

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

Constructor Detail

IndexedSequence

public IndexedSequence(Value sequence,
                       Expression key,
                       java.util.Comparator collator,
                       XPathContext context)
                throws XPathException

Construct an indexed sequence

Parameters:

sequence - the sequence to be indexed

key - the expression used to compute the key values for each item in the sequence

context - the context for evaluation

Throws:

XPathException - if evaluation of the key values fails for any reason

Method Detail

getSequence

public Value getSequence()

Get the entire sequence

find

public SequenceIterator find(AtomicValue value)

Get an iterator over the items with a given key value