public class EmptyAtomicSequence extends java.lang.Object implements AtomicSequence
Modifier and Type | Method and Description |
---|---|
boolean |
effectiveBooleanValue()
Get the effective boolean value of this sequence
|
UnicodeString |
getCanonicalLexicalRepresentation()
Get the canonical lexical representation as defined in XML Schema.
|
static EmptyAtomicSequence |
getInstance() |
int |
getLength()
Get the length of the sequence
|
java.lang.String |
getStringValue()
Get the string value of this sequence, as an instance of
String . |
UnicodeString |
getUnicodeStringValue()
Get a string representation of the sequence.
|
AtomicValue |
head()
Get the first item in the sequence
|
AtomicValue |
itemAt(int n)
Get the Nth item in the sequence, zero-based
|
AtomicIterator |
iterate()
Make an iterator over the items in the sequence
|
java.util.Iterator<AtomicValue> |
iterator()
Return a Java iterator over the atomic sequence.
|
EmptyAtomicSequence |
reduce()
Reduce the sequence to its simplest form.
|
EmptyAtomicSequence |
subsequence(int start,
int length)
Get a subsequence of the value
|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
asIterable, concatenate, containsNode, materialize, toShortString
makeRepeatable
public static EmptyAtomicSequence getInstance()
public AtomicValue head()
AtomicSequence
head
in interface AtomicSequence
head
in interface GroundedValue
head
in interface Sequence
public AtomicIterator iterate()
AtomicSequence
iterate
in interface AtomicSequence
iterate
in interface GroundedValue
iterate
in interface Sequence
public AtomicValue itemAt(int n)
AtomicSequence
itemAt
in interface AtomicSequence
itemAt
in interface GroundedValue
n
- the index of the required item, with 0 representing the first item in the sequencepublic int getLength()
AtomicSequence
getLength
in interface AtomicSequence
getLength
in interface GroundedValue
public UnicodeString getCanonicalLexicalRepresentation()
getCanonicalLexicalRepresentation
in interface AtomicSequence
public UnicodeString getUnicodeStringValue()
AtomicSequence
getUnicodeStringValue
in interface AtomicSequence
getUnicodeStringValue
in interface GroundedValue
public java.lang.String getStringValue()
GroundedValue
String
.
The string value of an item is the result of applying the XPath string()
function. The string value of a sequence is the space-separated result of applying the string-join() function
using a single space as the separator.
The result of this method is always equivalent to the result of the GroundedValue.getUnicodeStringValue()
method.
Use this method in preference either (a) if you need to use the value in a context where a String
is required, or (b) if the underlying value is held as a String
, or in a form that is readily
converted to a String
. This is typically the case (i) when the value is an attribute node
in a TinyTree, or (ii) any kind of node in a third-party tree model such as DOM.
getStringValue
in interface GroundedValue
public EmptyAtomicSequence subsequence(int start, int length)
subsequence
in interface GroundedValue
start
- the index of the first item to be included in the result, counting from zero.
A negative value is taken as zero. If the value is beyond the end of the sequence, an empty
sequence is returnedlength
- the number of items to be included in the result. Specify Integer.MAX_VALUE to
get the subsequence up to the end of the base sequence. If the value is negative, an empty sequence
is returned. If the value goes off the end of the sequence, the result returns items up to the end
of the sequencepublic boolean effectiveBooleanValue()
GroundedValue
effectiveBooleanValue
in interface GroundedValue
public EmptyAtomicSequence reduce()
reduce
in interface GroundedValue
public java.util.Iterator<AtomicValue> iterator()
iterator
in interface java.lang.Iterable<AtomicValue>
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