NullADQLIterator

java.lang.Object

adql.query.NullADQLIterator

All Implemented Interfaces:: ADQLIterator, Iterator<ADQLObject>

public class NullADQLIterator extends Object implements ADQLIterator

An ADQL iterator which has no ADQL objects on which iterate.

Constructor Summary

Constructors

Constructor

Description

NullADQLIterator()
Method Summary

Modifier and Type

Method

Description

boolean

hasNext()

ADQLObject

next()

void

remove()

void

replace(ADQLObject replacer)

Replaces the current ADQL object by the given ADQL object.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Iterator
forEachRemaining

Constructor Details
- NullADQLIterator
  
  public NullADQLIterator()
Method Details
- hasNext
  
  public boolean hasNext()
  
  Specified by:
  
  hasNext in interface Iterator<ADQLObject>
- next
  
  public ADQLObject next()
  
  Specified by:
  
  next in interface Iterator<ADQLObject>
- remove
  
  public void remove()
  
  Specified by:
  
  remove in interface Iterator<ADQLObject>
- replace
  
  public void replace(ADQLObject replacer) throws UnsupportedOperationException, IllegalStateException
  
  Description copied from interface: ADQLIterator
  
  Replaces the current ADQL object by the given ADQL object. This method can be called only one time per call to next.
  
  Specified by:
  
  replace in interface ADQLIterator
  
  Parameters:
  
  replacer - The ADQL object which has to replace the current object.
  
  Throws:
  
  UnsupportedOperationException - If the replace operation is not supported by this ADQLIterator.
  
  IllegalStateException - If the next method has not yet been called, or the replace method has already been called after the last call to the next method.