public abstract class AbstractItem extends java.lang.Object implements Item, GroundedValue
Constructor and Description |
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AbstractItem() |
Modifier and Type | Method and Description |
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int |
getLength()
Get the size of the value (the number of items)
|
Item |
head()
Get the first item in the sequence.
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boolean |
isStreamed()
Ask whether this is a node in a streamed document
|
Item |
itemAt(int n)
Get the n'th item in the value, counting from 0
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UnfailingIterator |
iterate()
Get an iterator over all the items in the sequence
|
GroundedValue |
reduce()
Reduce the sequence to its simplest form.
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GroundedValue |
subsequence(int start,
int length)
Get a subsequence of the value
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
atomize, getStringValue, getStringValueCS
effectiveBooleanValue, getStringValue, getStringValueCS
public Item itemAt(int n)
itemAt
in interface GroundedValue
n
- the index of the required item, with 0 representing the first item in the sequencepublic final GroundedValue 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 final int getLength()
getLength
in interface GroundedValue
public Item head()
public UnfailingIterator iterate()
iterate
in interface GroundedValue
iterate
in interface Sequence
public GroundedValue reduce()
reduce
in interface GroundedValue
public boolean isStreamed()
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