SetToDoubleSetAdapter (Primitive Collections for Java API v1.2)

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PCJ API
Version 1.2

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bak.pcj.adapter
Class SetToDoubleSetAdapter

java.lang.Object
  bak.pcj.AbstractDoubleCollection
      bak.pcj.set.AbstractDoubleSet
          bak.pcj.adapter.SetToDoubleSetAdapter

All Implemented Interfaces:: DoubleCollection, DoubleSet

Direct Known Subclasses:: SortedSetToDoubleSortedSetAdapter

public class SetToDoubleSetAdapter
extends AbstractDoubleSet
implements DoubleSet

This class represents adaptions of Java Collections Framework sets to primitive sets of double values. The adapter is implemented as a wrapper around the set. Thus, changes to the underlying set are reflected by this set and vice versa.

Adapters from JCF collections to primitive collections will fail if the JCF collection contains null values or values of the wrong class. However, adapters are not fast failing in the case that the underlying collection should contain illegal values. To implement fast failure would require every operation to check every element of the underlying collection before doing anything. Instead validation methods are provided. They can be called using the assertion facility in the client code:

      SetToDoubleSetAdapter s;
      ...
      assert s.validate();

or by letting the adapter throw an exception on illegal values:

      SetToDoubleSetAdapter s;
      ...
      s.evalidate();  // Throws an exception on illegal values

Either way, validation must be invoked directly by the client code.

Since:: 1.0

Field Summary
`protected Set`	`set` The underlying set.

Constructor Summary
`SetToDoubleSetAdapter(Set set)` Creates a new adaption to a set of double values.
`SetToDoubleSetAdapter(Set set, boolean validate)` Creates a new adaption to a set of double values.

Method Summary
`boolean`	`add(double v)` Adds an element to this collection.
`void`	`clear()` Clears this collection.
`boolean`	`contains(double v)` Indicates whether this collection contains a specified element.
`void`	`evalidate()` Validates the set underlying this adapter and throws an exception if it is invalid.
`int`	`hashCode()` Returns a hash code value for this collection.
`DoubleIterator`	`iterator()` Returns an iterator over this collection.
`boolean`	`remove(double v)` Removes a specified element from this collection.
`int`	`size()` Returns the number of elements in this collection.
`boolean`	`validate()` Indicates whether the underlying set is valid for this adapter.

Methods inherited from class bak.pcj.set.AbstractDoubleSet

equals

Methods inherited from class bak.pcj.AbstractDoubleCollection

addAll, containsAll, isEmpty, removeAll, retainAll, toArray, toArray, toString, trimToSize

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface bak.pcj.DoubleCollection

addAll, containsAll, equals, isEmpty, removeAll, retainAll, toArray, toArray, trimToSize

Field Detail

set

protected Set set

The underlying set.

Constructor Detail

SetToDoubleSetAdapter

public SetToDoubleSetAdapter(Set set)

Creates a new adaption to a set of double values.
Parameters:: set - the underlying set. This set must consist of values of class Double. Otherwise a ClassCastException will be thrown by some methods.
Throws:: NullPointerException - if set is null.

SetToDoubleSetAdapter

public SetToDoubleSetAdapter(Set set,
                             boolean validate)

Creates a new adaption to a set of double values. The set to adapt is optionally validated.
Parameters:: set - the underlying set. This set must consist of values of class Double. Otherwise a ClassCastException will be thrown by some methods.; validate - indicates whether set should be checked for illegal values.
Throws:: NullPointerException - if set is null.; IllegalStateException - if validate is true and set contains a null value or a value that is not of class Double.

Method Detail