org.gcube.data.streams.adapters
Class ResultsetStream<E extends gr.uoa.di.madgik.grs.record.Record>

java.lang.Object
  org.gcube.data.streams.LookAheadStream<E>
      org.gcube.data.streams.adapters.ResultsetStream<E>

All Implemented Interfaces:

Iterator<E>, Stream<E>

public class ResultsetStream<E extends gr.uoa.di.madgik.grs.record.Record>
extends LookAheadStream<E>

A Stream adapter for gRS2 resultsets.

This implementation is not thread safe.

Author:

Fabio Simeoni

Field Summary

static int	default_timeout
static TimeUnit	default_timeout_unit

Fields inherited from class org.gcube.data.streams.LookAheadStream

element, hasNext

Constructor Summary

ResultsetStream(URI locator)
Creates a new instance with a result set locator.

Method Summary

void	close() Closes the stream unconditionally, releasing any resources that it may be using.
protected boolean	delegateHasNext() Returns true if the underlying stream has more elements.
protected E	delegateNext() Returns an element of the underlying stream
boolean	isClosed() Returns true if the stream has been closed.
URI	locator() Returns the stream locator.
void	remove()
void	setTimeout(long timeout, TimeUnit unit)

Methods inherited from class org.gcube.data.streams.LookAheadStream

hasNext, next, setHandler

Methods inherited from class java.lang.Object

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

Field Detail

default_timeout

public static final int default_timeout

See Also:

Constant Field Values

default_timeout_unit

public static final TimeUnit default_timeout_unit

Constructor Detail

ResultsetStream

public ResultsetStream(URI locator)
                throws IllegalArgumentException

Creates a new instance with a result set locator.

Parameters:

locator - the locator.

Throws:

IllegalArgumentException - if the locator is null.

Method Detail

setTimeout

public void setTimeout(long timeout,
                       TimeUnit unit)
                throws IllegalArgumentException

Throws:

IllegalArgumentException

delegateNext

protected E delegateNext()

Description copied from class: LookAheadStream

Returns an element of the underlying stream

Specified by:

delegateNext in class LookAheadStream<E extends gr.uoa.di.madgik.grs.record.Record>

Returns:

the element

delegateHasNext

protected boolean delegateHasNext()

Description copied from class: LookAheadStream

Returns true if the underlying stream has more elements.

Specified by:

delegateHasNext in class LookAheadStream<E extends gr.uoa.di.madgik.grs.record.Record>

Returns:

true if the underlying stream has more elements

close

public void close()

Description copied from interface: Stream

Closes the stream unconditionally, releasing any resources that it may be using.

Subsequent invocations of this method have no effect.
Subsequents invocations of Stream.hasNext() return false.
Subsequent invocations of Stream.next() throw NoSuchElementExceptions.

Failures are logged by implementations and suppressed otherwise.

locator

public URI locator()
            throws IllegalStateException

Description copied from interface: Stream

Returns the stream locator.

Returns:

the locator

Throws:

IllegalStateException - if the stream is no longer addressable at the time of invocation.

remove

public void remove()

isClosed

public boolean isClosed()

Description copied from interface: Stream

Returns true if the stream has been closed.

Returns:

true if the stream has been closed