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java.lang.Object net.sf.saxon.value.Value net.sf.saxon.value.ShareableSequence
public final class ShareableSequence
A sequence value implemented extensionally using an extensible List whose leading part can be shared with other sequence values. The list can be appended to by other users (at most one other user!), but the items within the range used by this sequence value cannot be modified.
Field Summary |
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Fields inherited from class net.sf.saxon.value.Value |
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INDETERMINATE_ORDERING |
Fields inherited from interface net.sf.saxon.om.ValueRepresentation |
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EMPTY_VALUE_ARRAY |
Constructor Summary | |
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ShareableSequence(List list)
Construct an sequence from an array of items. |
Method Summary | |
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boolean |
effectiveBooleanValue()
Get the effective boolean value |
int |
getCardinality()
Determine the cardinality |
ItemType |
getItemType(TypeHierarchy th)
Get the (lowest common) item type |
int |
getLength()
Get the number of items in the sequence |
List |
getList()
Get the underlying list |
boolean |
isShareable()
Determine whether another value can share this list. |
Item |
itemAt(int n)
Get the n'th item in the sequence (starting with 0 as the first item) |
SequenceIterator |
iterate()
Return an iterator over this sequence. |
static ShareableSequence |
makeShareableSequence(Value baseVal,
SequenceIterator iter)
Make a new ShareableSequence from an existing value and an iterator over items to be appended to the sequence |
Value |
reduce()
Reduce a value to its simplest form. |
Value |
simplify()
Simplify this value |
String |
toString()
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Methods inherited from class net.sf.saxon.value.Value |
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asItem, asItem, asIterator, asValue, checkPermittedContents, convertToJava, equals, fromItem, getCanonicalLexicalRepresentation, getIterator, getSchemaComparable, getSequenceLength, getStringValue, getStringValueCS, hashCode, isIdentical, process |
Methods inherited from class java.lang.Object |
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clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public ShareableSequence(List list)
list
- the list of items to be included in the sequenceMethod Detail |
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public static ShareableSequence makeShareableSequence(Value baseVal, SequenceIterator iter) throws XPathException
baseVal
- the base value (which may or may not be a ShareableSequence)iter
- the items to be added
XPathException
public boolean isShareable()
public List getList()
public Value simplify()
public Value reduce()
reduce
in class Value
public int getLength()
getLength
in class Value
public int getCardinality()
getCardinality
in class Value
Cardinality
public ItemType getItemType(TypeHierarchy th)
getItemType
in class Value
th
- the type hierarchy cache. If null is supplied, the resulting value may be less precise
public Item itemAt(int n)
itemAt
in class Value
n
- the position of the required item
public SequenceIterator iterate()
iterate
in class Value
public boolean effectiveBooleanValue() throws XPathException
effectiveBooleanValue
in class Value
XPathException
- if any dynamic error occurs evaluating the
expressionpublic String toString()
toString
in class Object
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