org.hsqldb.lib

Class WrapperIterator

java.lang.Object

org.hsqldb.lib.WrapperIterator

All Implemented Interfaces:

Iterator

public class WrapperIterator
extends java.lang.Object
implements Iterator

An Iterator that returns the elements of a specified array, or other iterators etc. The collection of objects returned depends on the constructor used.

Based on similar Enumerator code by boucherb@users

Since:

HSQLDB 1.7.2

Constructor Summary

Constructors

Constructor and Description
WrapperIterator() Constructor for an empty iterator.
WrapperIterator(Iterator it1, Iterator it2) Constructor for a chained iterator that returns the elements of the two specified iterators.
WrapperIterator(java.lang.Object element) Constructor for a singleton object iterator
WrapperIterator(java.lang.Object[] elements) Constructor for all elements of the specified array.
WrapperIterator(java.lang.Object[] elements, boolean notNull) Constructor for not-null elements of specified array.

Method Summary

Modifier and Type	Method and Description
boolean	hasNext() Tests if this iterator contains more elements.
java.lang.Object	next() Returns the next element.
int	nextInt()
long	nextLong()
void	remove()
void	setValue(java.lang.Object value)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

WrapperIterator

public WrapperIterator()

Constructor for an empty iterator.

WrapperIterator

public WrapperIterator(java.lang.Object[] elements)

Constructor for all elements of the specified array.

Parameters:

elements - the array of objects to enumerate

WrapperIterator

public WrapperIterator(java.lang.Object[] elements,
                       boolean notNull)

Constructor for not-null elements of specified array.

Parameters:

elements - the array of objects to iterate

WrapperIterator

public WrapperIterator(java.lang.Object element)

Constructor for a singleton object iterator

Parameters:

element - the single object to iterate

WrapperIterator

public WrapperIterator(Iterator it1,
                       Iterator it2)

Constructor for a chained iterator that returns the elements of the two specified iterators.

Method Detail

hasNext

public boolean hasNext()

Tests if this iterator contains more elements.

Specified by:

hasNext in interface Iterator

Returns:

true if this iterator contains more elements; false otherwise.

next

public java.lang.Object next()

Returns the next element.

Specified by:

next in interface Iterator

Returns:

the next element

Throws:

java.util.NoSuchElementException - if there is no next element

nextInt

public int nextInt()

Specified by:

nextInt in interface Iterator

nextLong

public long nextLong()

Specified by:

nextLong in interface Iterator

remove

public void remove()

Specified by:

remove in interface Iterator

setValue

public void setValue(java.lang.Object value)

Specified by:

setValue in interface Iterator