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java.lang.Objectorg.exist.xquery.value.AbstractSequence
org.exist.xquery.value.GroupedValueSequence
public class GroupedValueSequence
A sequence that containts items of one group specified by the group specs of
an "group by" clause. Used by
GroupedValueSequenceTable
.
This class is based on OrderedValueSequence
.
WARNING : don't use except for group by clause
Field Summary |
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Fields inherited from interface org.exist.xquery.value.Sequence |
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EMPTY_SEQUENCE |
Constructor Summary | |
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GroupedValueSequence(GroupSpec[] groupSpecs,
int size,
Sequence keySequence,
XQueryContext aContext)
|
Method Summary | |
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void |
add(Item item)
Add an item to the current sequence. |
void |
addAll(Sequence other)
Add all items of the other sequence to this item. |
Sequence |
getGroupKey()
|
int |
getItemCount()
Returns the number of items contained in the sequence. |
int |
getItemType()
Return the primary type to which all items in this sequence belong. |
boolean |
hasOne()
Returns whether the sequence has just one item or not. |
boolean |
isEmpty()
Returns whether the sequence is empty or not. |
Item |
itemAt(int pos)
Returns the item located at the specified position within this sequence. |
SequenceIterator |
iterate()
Returns an iterator over all items in the sequence. |
void |
removeDuplicates()
Explicitely remove all duplicate nodes from this sequence. |
NodeSet |
toNodeSet()
Convert the sequence into a NodeSet. |
SequenceIterator |
unorderedIterator()
Returns an iterator over all items in the sequence. |
Methods inherited from class org.exist.xquery.value.AbstractSequence |
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clearContext, conversionPreference, convertTo, effectiveBooleanValue, getCardinality, getCollectionIterator, getDocumentSet, getState, getStringValue, hasChanged, hasMany, isCacheable, isCached, isPersistentSet, nodeMoved, setIsCached, setSelfAsContext, toJavaObject, toString |
Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public GroupedValueSequence(GroupSpec[] groupSpecs, int size, Sequence keySequence, XQueryContext aContext)
Method Detail |
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public SequenceIterator iterate() throws XPathException
Sequence
iterate
in interface Sequence
iterate
in class AbstractSequence
XPathException
- TODOpublic SequenceIterator unorderedIterator()
Sequence
unorderedIterator
in interface Sequence
unorderedIterator
in class AbstractSequence
public int getItemCount()
Sequence
getItemCount
in interface Sequence
getItemCount
in class AbstractSequence
public Sequence getGroupKey()
public boolean isEmpty()
Sequence
isEmpty
in interface Sequence
isEmpty
in class AbstractSequence
true
is the sequence is emptypublic boolean hasOne()
Sequence
hasOne
in interface Sequence
hasOne
in class AbstractSequence
true
is the sequence has just one itempublic void add(Item item) throws XPathException
Sequence
XPathException
may be thrown
if the item's type is incompatible with this type of sequence (e.g. if the sequence
is a node set).
The sequence may or may not allow duplicate values.
add
in interface Sequence
add
in class AbstractSequence
XPathException
public void addAll(Sequence other) throws XPathException
Sequence
XPathException
may
be thrown if the type of the items in the other sequence is incompatible with
the primary type of this sequence.
addAll
in interface Sequence
addAll
in class AbstractSequence
XPathException
public Item itemAt(int pos)
Sequence
itemAt
in interface Sequence
itemAt
in class AbstractSequence
public int getItemType()
Sequence
Type.NODE
for node sets, Type.ITEM
for other sequences with mixed items.
getItemType
in interface Sequence
getItemType
in class AbstractSequence
public NodeSet toNodeSet() throws XPathException
Sequence
XPathException
- if the sequence contains items which are not nodes.public void removeDuplicates()
Sequence
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