WrapperUIterator

java.lang.Object

com.mchange.v1.util.WrapperUIterator

All Implemented Interfaces:: ClosableResource, UIterator

public abstract class WrapperUIterator extends Object implements UIterator

This implementation does not yet support removes once hasNext() has been called... will add if necessary.

Field Summary

Fields

Modifier and Type

Field

Description

protected static final Object

SKIP_TOKEN
Constructor Summary

Constructors

Constructor

Description

WrapperUIterator(UIterator inner)

WrapperUIterator(UIterator inner, boolean supports_remove)
Method Summary

Modifier and Type

Method

Description

void

close()

forces the release of any resources that might be associated with this object.

boolean

hasNext()

Object

next()

void

remove()

protected abstract Object

transformObject(Object o)

return SKIP_TOKEN to indicate an object should be skipped, i.e., not exposed as part of the iterator.

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

Field Details
- SKIP_TOKEN
  
  protected static final Object SKIP_TOKEN
Constructor Details
- WrapperUIterator
  
  public WrapperUIterator(UIterator inner, boolean supports_remove)
- WrapperUIterator
  
  public WrapperUIterator(UIterator inner)
Method Details
- hasNext
  
  public boolean hasNext() throws Exception
  
  Specified by:
  
  hasNext in interface UIterator
  
  Throws:
  
  Exception
- next
  
  public Object next() throws NoSuchElementException, Exception
  
  Specified by:
  
  next in interface UIterator
  
  Throws:
  
  NoSuchElementException
  
  Exception
- remove
  
  public void remove() throws Exception
  
  Specified by:
  
  remove in interface UIterator
  
  Throws:
  
  Exception
- close
  
  public void close() throws Exception
  
  Description copied from interface: ClosableResource
  
  forces the release of any resources that might be associated with this object.
  
  Specified by:
  
  close in interface ClosableResource
  
  Specified by:
  
  close in interface UIterator
  
  Throws:
  
  Exception
- transformObject
  
  protected abstract Object transformObject(Object o) throws Exception
  
  return SKIP_TOKEN to indicate an object should be skipped, i.e., not exposed as part of the iterator. (we don't use null, because we want to support iterators over null-accepting Collections.)
  
  Throws:
  
  Exception