net.sf.saxon.option.exslt
Class Sets

java.lang.Object
  net.sf.saxon.option.exslt.Sets

public abstract class Sets
extends Object

This class implements extension functions in the http://exslt.org/sets namespace.

Method Summary

static SequenceIterator	difference(SequenceIterator p1, SequenceIterator p2) Return the difference of two node-sets (interpreted as sequences of nodes that must be supplied in document order)
static boolean	hasSameNode(SequenceIterator p1, SequenceIterator p2) Determine whether two node-sets (interpreted as sequences of nodes that must be supplied in document order) contain at least one node in common
static SequenceIterator	intersection(SequenceIterator p1, SequenceIterator p2) Return the intersection of two node-sets (interpreted as sequences of nodes that must be supplied in document order)
static SequenceIterator	leading(XPathContext context, SequenceIterator ns1, SequenceIterator ns2) Find all the nodes in ns1 that are before the first node in ns2.
static SequenceIterator	trailing(XPathContext context, SequenceIterator ns1, SequenceIterator ns2) Find all the nodes in ns1 that are after the first node in ns2.

Methods inherited from class java.lang.Object

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

Method Detail

intersection

public static SequenceIterator intersection(SequenceIterator p1,
                                            SequenceIterator p2)
                                     throws XPathException

Return the intersection of two node-sets (interpreted as sequences of nodes that must be supplied in document order)

Parameters:

p1 - The first node-set

p2 - The second node-set

Returns:

A node-set containing all nodes that are in both p1 and p2

Throws:

XPathException

difference

public static SequenceIterator difference(SequenceIterator p1,
                                          SequenceIterator p2)
                                   throws XPathException

Return the difference of two node-sets (interpreted as sequences of nodes that must be supplied in document order)

Parameters:

p1 - The first node-set

p2 - The second node-set

Returns:

A node-set containing all nodes that are in p1 and not in p2

Throws:

XPathException

hasSameNode

public static boolean hasSameNode(SequenceIterator p1,
                                  SequenceIterator p2)
                           throws XPathException

Determine whether two node-sets (interpreted as sequences of nodes that must be supplied in document order) contain at least one node in common

Parameters:

p1 - The first node-set

p2 - The second node-set

Returns:

true if p1 and p2 contain at least one node in common (i.e. if the intersection is not empty)

Throws:

XPathException

leading

public static SequenceIterator leading(XPathContext context,
                                       SequenceIterator ns1,
                                       SequenceIterator ns2)
                                throws XPathException

Find all the nodes in ns1 that are before the first node in ns2. Return empty set if ns2 is empty. For this function, Saxon does not assume that the two sequences of nodes are supplied in document order.

Parameters:

ns1 - The first node-set

ns2 - The second node-set

Returns:

the nodes in the node set passed as the first argument that precede, in document order, the first node in the node set passed as the second argument.

Throws:

XPathException

trailing

public static SequenceIterator trailing(XPathContext context,
                                        SequenceIterator ns1,
                                        SequenceIterator ns2)
                                 throws XPathException

Find all the nodes in ns1 that are after the first node in ns2. Return empty set if ns2 is empty,

Parameters:

ns1 - The first node-set

ns2 - The second node-set

Returns:

the nodes in the node set passed as the first argument that follow, in document order, the first node in the node set passed as the second argument.

Throws:

XPathException