java.io.Serializable
, Expression
, ValueRepresentation
public final class SequenceExtent extends Value
EVALUATE_METHOD, ITERATE_METHOD, PROCESS_METHOD
EMPTY_CLASS_ARRAY
EMPTY_VALUE_ARRAY
Constructor | Description |
---|---|
SequenceExtent(java.util.List list) |
Construct a SequenceExtent from a List.
|
SequenceExtent(Item[] items) |
Construct an sequence from an array of items.
|
SequenceExtent(Item[] value,
int start,
int length) |
Construct a SequenceExtent from part of an array of items
|
SequenceExtent(SequenceIterator iter) |
Construct a sequence containing all the items in a SequenceIterator.
|
SequenceExtent(SequenceExtent ext,
int start,
int length) |
Construct a SequenceExtent as a view of another SequenceExtent
|
Modifier and Type | Method | Description |
---|---|---|
boolean |
effectiveBooleanValue(XPathContext context) |
Get the effective boolean value
|
int |
getCardinality() |
Determine the cardinality
|
int |
getImplementationMethod() |
An implementation of Expression must provide at least one of the methods evaluateItem(), iterate(), or process().
|
ItemType |
getItemType(TypeHierarchy th) |
Get the (lowest common) item type
|
int |
getLength() |
Get the number of items in the sequence
|
Item |
itemAt(int n) |
Get the n'th item in the sequence (starting with 0 as the first item)
|
SequenceIterator |
iterate(XPathContext context) |
Return an iterator over this sequence.
|
static ValueRepresentation |
makeSequenceExtent(SequenceIterator iter) |
Factory method to make a Value holding the contents of any SequenceIterator
|
Value |
reduce() |
Reduce a value to its simplest form.
|
AxisIterator |
reverseIterate() |
Return an enumeration of this sequence in reverse order (used for reverse axes)
|
Value |
simplify() |
Simplify this SequenceExtent
|
void |
swap(int a,
int b) |
Swap two items (needed to support sorting)
|
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
asItem, asIterator, asValue, checkPermittedContents, convert, convertJavaObjectToXPath, convertToJava, display, equals, evaluateAsString, evaluateItem, getDependencies, getIterator, getParentExpression, getSpecialProperties, getStringValue, getStringValueCS, hashCode, iterateSubExpressions, makeQNameValue, optimize, process, promote, simplify, stringToNumber, toString, typeCheck
public SequenceExtent(Item[] items)
items
- the array of items to be included in the sequencepublic SequenceExtent(Item[] value, int start, int length)
value
- The arraystart
- zero-based offset of the first item in the array
that is to be included in the new SequenceExtentlength
- The number of items in the new SequenceExtentpublic SequenceExtent(SequenceExtent ext, int start, int length)
ext
- The existing SequenceExtentstart
- zero-based offset of the first item in the existing SequenceExtent
that is to be included in the new SequenceExtentlength
- The number of items in the new SequenceExtentpublic SequenceExtent(java.util.List list)
list
- the list of items to be included in the sequencepublic SequenceExtent(SequenceIterator iter) throws XPathException
iter
- The supplied sequence of items. This must be positioned at
the start, so that hasNext() returns true if there are any nodes in
the node-set, and next() returns the first node.XPathException
- if reading the items using the
SequenceIterator raises an errorpublic static ValueRepresentation makeSequenceExtent(SequenceIterator iter) throws XPathException
XPathException
public int getImplementationMethod()
public Value simplify()
public Value reduce()
public int getLength()
public int getCardinality()
getCardinality
in interface Expression
getCardinality
in class Value
Cardinality
public ItemType getItemType(TypeHierarchy th)
getItemType
in interface Expression
getItemType
in class Value
th
- public Item itemAt(int n)
public void swap(int a, int b)
a
- the position of the first item to be swappedb
- the position of the second item to be swappedpublic SequenceIterator iterate(XPathContext context)
context
- dynamic evaluation context; not used in this
implementation of the methodpublic AxisIterator reverseIterate()
public boolean effectiveBooleanValue(XPathContext context) throws XPathException
effectiveBooleanValue
in interface Expression
effectiveBooleanValue
in class Value
context
- The context in which the expression is to be evaluatedXPathException
- if any dynamic error occurs evaluating the
expression