Oracle® Fusion Middleware C++ API Reference for Oracle Coherence: TypedBarrenClass Class Template Reference

Detailed Description

template<class T>
class coherence::lang::TypedBarrenClass< T >

TypedBarrenClass

Class

This is suitable for use with interfaces, abstract classes, and classes which do not have a zero-argument create method.

Author:

mf/jh 2008.05.02

Public Types

typedef spec::Handle

Handle

TypedBarrenClass<T> Handle definition.

typedef spec::View

View

TypedBarrenClass<T> View definition.

typedef spec::Holder

Holder

TypedBarrenClass<T> Holder definition.

typedef T

Type

Class type.

Public Member Functions

virtual Object::Handle

newInstance (ObjectArray::View) const

Create a new instance of the corresponding type.

Parameters:

vaParam

the object's initialization parameters

Returns:: a new instance of the corresponding type

virtual TypedHandle
< const String >

toString () const

Output a human-readable description of this Object to the given stream.

Note that when overriding this method the return type must be TypedHandle<const String> rather then String::View. These two types are assignment compatible but not equivalent and declaring the override with String::View will not be a compatible override.

coherence::lang::operator<<(std::ostream, Object::View) is defined and will call into the toString method, to output Objects. If a managed String object is desired, the COH_TO_STRING macro can be used to build up a String from streamable contents and is generally how toString() will be implemented.

 Object::View vKey   = ...
 Object::View vValue = ...
 std::cout << vKey << " = " << vValue << std::endl;

 String::View vs = COH_TO_STRING(vKey << " = " << vValue);

The COH_TO_STRING macro is also the most common way to implement the toString method. For example:

 virtual TypedHandle<const String> Person::toString() const
     {
     return COH_TO_STRING("Name: " << f_sName << " SSN: " << f_nSSN);
     }

Returns:: a string representation of this object

Protected Member Functions

T ()

Create a new TypedBarrenClass.

Member Function Documentation

virtual Object::Handle newInstance ( ObjectArray::View ) const [inline, virtual]

Create a new instance of the corresponding type.

Parameters:

vaParam

the object's initialization parameters

Returns:: a new instance of the corresponding type

Exceptions:

UnsupportedOperationException

Reimplemented from Class.