Package net.sf.saxon.tree.iter
Class ArrayIterator<T extends Item>
java.lang.Object
net.sf.saxon.tree.iter.ArrayIterator<T>
- All Implemented Interfaces:
Closeable
,AutoCloseable
,LastPositionFinder
,SequenceIterator
,GroundedIterator
,LookaheadIterator
,UnfailingIterator
- Direct Known Subclasses:
ArrayIterator.OfNodes
public class ArrayIterator<T extends Item>
extends Object
implements UnfailingIterator, LastPositionFinder, LookaheadIterator, GroundedIterator
ArrayIterator is used to enumerate items held in an array.
The items are always held in the correct sorted order for the sequence.
- Author:
- Michael H. Kay
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Nested Class Summary
Nested ClassesModifier and TypeClassDescriptionstatic class
ArrayIterator.OfNodes is a subclass of ArrayIterator where the array always contains Nodes; it therefore implements the AxisIterator interface.Nested classes/interfaces inherited from interface net.sf.saxon.om.SequenceIterator
SequenceIterator.Property
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Field Summary
Fields -
Constructor Summary
ConstructorsConstructorDescriptionArrayIterator
(T[] nodes) Create an iterator over all the items in an arrayArrayIterator
(T[] items, int start, int end) Create an iterator over a range of an array. -
Method Summary
Modifier and TypeMethodDescriptionT[]
getArray()
Get the underlying arrayint
Get the end position in the arrayint
Get the number of items in the part of the array being processedGet properties of this iterator, as a bit-significant integer.Return a GroundedValue containing all the remaining items in the sequence returned by this SequenceIterator, starting at the current position.int
Get the initial start positionboolean
hasNext()
Test whether there are any more itemsmakeSliceIterator
(int min, int max) Create a new ArrayIterator over the same items, with a different start point and end pointReturn a SequenceValue containing all the items in the sequence returned by this SequenceIteratornext()
Get the next item in the arrayMethods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface net.sf.saxon.om.SequenceIterator
close, forEachOrFail
Methods inherited from interface net.sf.saxon.tree.iter.UnfailingIterator
forEach, toList
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Field Details
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items
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start
protected int start -
end
protected int end
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Constructor Details
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ArrayIterator
Create an iterator over all the items in an array- Parameters:
nodes
- the array (of any items, not necessarily nodes) to be processed by the iterator
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ArrayIterator
Create an iterator over a range of an array. Note that the start position is zero-based- Parameters:
items
- the array (of nodes or simple values) to be processed by the iteratorstart
- the position of the first item to be processed (numbering from zero). Must be between zero and nodes.length-1; if not, undefined exceptions are likely to occur.end
- position of first item that is NOT returned, zero-based. Must be beween 1 and nodes.length; if not, undefined exceptions are likely to occur.
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Method Details
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makeSliceIterator
Create a new ArrayIterator over the same items, with a different start point and end point- Parameters:
min
- the start position (1-based) of the new ArrayIterator relative to the originalmax
- the end position (1-based) of the last item to be delivered by the new ArrayIterator, relative to the original. For example, min=2, max=3 delivers the two items ($base[2], $base[3]). Set this to Integer.MAX_VALUE if there is no end limit.- Returns:
- an iterator over the items between the min and max positions
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hasNext
public boolean hasNext()Test whether there are any more items- Specified by:
hasNext
in interfaceLookaheadIterator
- Returns:
- true if there are more items
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next
Get the next item in the array- Specified by:
next
in interfaceSequenceIterator
- Specified by:
next
in interfaceUnfailingIterator
- Returns:
- the next item in the array
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getLength
public int getLength()Get the number of items in the part of the array being processed- Specified by:
getLength
in interfaceLastPositionFinder
- Returns:
- the number of items; equivalently, the position of the last item
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getArray
Get the underlying array- Returns:
- the underlying array being processed by the iterator
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getStartPosition
public int getStartPosition()Get the initial start position- Returns:
- the start position of the iterator in the array (zero-based)
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getEndPosition
public int getEndPosition()Get the end position in the array- Returns:
- the position in the array (zero-based) of the first item not included in the iteration
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materialize
Return a SequenceValue containing all the items in the sequence returned by this SequenceIterator- Specified by:
materialize
in interfaceGroundedIterator
- Specified by:
materialize
in interfaceSequenceIterator
- Returns:
- the corresponding SequenceValue
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getResidue
Description copied from interface:GroundedIterator
Return a GroundedValue containing all the remaining items in the sequence returned by this SequenceIterator, starting at the current position. This should be an "in-memory" value, not a Closure. This method does not change the state of the iterator (in particular, it does not consume the iterator).- Specified by:
getResidue
in interfaceGroundedIterator
- Returns:
- the corresponding Value
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getProperties
Get properties of this iterator, as a bit-significant integer.- Specified by:
getProperties
in interfaceSequenceIterator
- Returns:
- the properties of this iterator. This will be some combination of
properties such as
SequenceIterator.Property.GROUNDED
,SequenceIterator.Property.LAST_POSITION_FINDER
, andSequenceIterator.Property.LOOKAHEAD
. It is always acceptable to return the value zero, indicating that there are no known special properties. It is acceptable for the properties of the iterator to change depending on its state.
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