structure
Class ValueIterator

java.lang.Object
  |
  +--structure.AbstractIterator
        |
        +--structure.ValueIterator

All Implemented Interfaces:

java.util.Enumeration, java.util.Iterator

class ValueIterator

extends AbstractIterator

A private master iterator for filtering the value fields from an Association-returning iterator.This iterator returns objects of the Object type, and is publically available throught the Hashtable.iterator() method.

Typical use:

      Hashtable h = new Hashtable();
      // ...hashtable gets built up...
      Iterator hi = h.keys();
      while (hi.hasNext())
      {
          System.out.println(ai.next());
      }
 

Field Summary

protected java.util.Iterator

slave The underlying iterator.

Constructor Summary

ValueIterator(java.util.Iterator slave)
Construct a new value iterator that filters the slave iterator, an Association-returning iterator.

Method Summary

java.lang.Object	get() Returns the current value from the slave iterator.
boolean	hasNext() Returns true if an association is available for generating a value.
java.lang.Object	next() Returns the current value, and increments the iterator.
void	reset() Resets the slave iterator (and thus the value iterator) to the first association in the structure.

Methods inherited from class structure.AbstractIterator

hasMoreElements, nextElement, remove, value

Methods inherited from class java.lang.Object

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

Field Detail

slave

protected java.util.Iterator slave

The underlying iterator. The slave iterator provides the value iterator values which are Associations. The value iterator returns only the value-portion of the Associations.

Constructor Detail

ValueIterator

public ValueIterator(java.util.Iterator slave)

Construct a new value iterator that filters the slave iterator, an Association-returning iterator.

Parameters:

slave - The slave iterator.

Method Detail

reset

public void reset()

Resets the slave iterator (and thus the value iterator) to the first association in the structure.

Specified by:

reset in class AbstractIterator

hasNext

public boolean hasNext()

Returns true if an association is available for generating a value.

Specified by:

hasNext in interface java.util.Iterator

Specified by:

hasNext in class AbstractIterator

Returns:

True if a valid value can be generated.

See Also:

AbstractIterator.hasMoreElements()

next

public java.lang.Object next()

Returns the current value, and increments the iterator.

Specified by:

next in interface java.util.Iterator

Specified by:

next in class AbstractIterator

Returns:

The current value, before iterator is incremented.

See Also:

AbstractIterator.hasMoreElements(), AbstractIterator.value()

get

public java.lang.Object get()

Returns the current value from the slave iterator.

Specified by:

get in class AbstractIterator

Returns:

The current value associated with the iterator.