Oracle Coherence for C++ API


AbstractSet Class Reference

#include <coherence/util/AbstractSet.hpp>

Inherits AbstractCollection, and Set.

Inherited by DeltaSet, LiteSet, NullImplementation::NullSet, and SubSet.

List of all members.

Detailed Description

This class provides a skeletal implementation of the Set interface to minimize the effort required to implement this interface.

The process of implementing a set by extending this class is identical to that of implementing a Collection by extending AbstractCollection, except that all of the methods and constructors in subclasses of this class must obey the additional constraints imposed by the Set interface (for instance, the add method must not permit addition of multiple instances of an object to a set).

js 2008.05.12

Public Types

typedef spec::Handle Handle
 AbstractSet Handle definition.
typedef spec::View View
 AbstractSet View definition.
typedef spec::Holder Holder
 AbstractSet Holder definition.

Public Member Functions

virtual bool equals (Object::View v) const
virtual size32_t hashCode () const
 Return a hash code value for the Object.

This method is supported for the benefit of hash-based containers.

The general contract of hashCode is:

  • Whenever it is invoked on the same Object more than once during an execution of an application, the hashCode method must consistently return the same value, provided no information used in equals comparisons on the object is modified. This value need not remain consistent from one execution of an application to another execution of the same application.
  • If two Objects are equal according to the equals method, then calling the hashCode method on each of the two Objects must produce the same value.
  • It is not required that if two Objects are unequal according to the equals method, then calling the hashCode method on each of the two objects must produce distinct results. However, the programmer should be aware that producing distinct results for unequal objects may improve the performance of hash-based containers.

The default implementation is identity based.

a hash code value for this Object

The documentation for this class was generated from the following file:
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