Oracle Coherence for C++ API: AbstractCompositeExtractor Class Reference

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.

Returns:: a hash code value for this Object

virtual void

toStream (std::ostream &out) const

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

coherence::lang::operator<<(std::ostream, Object::View) is defined and will call into the toStream 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.

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

 String::Handle hs = COH_TO_STRING(vKey << " = " << vValue);

Parameters:

out

the stream used to output the description

virtual ObjectArray::View

getExtractors () const

Obtain the ValueExtractor array.

Protected Member Functions

AbstractCompositeExtractor ()

Default constructor (necessary for the PortableObject interface).

AbstractCompositeExtractor (ObjectArray::View vaExtractor)

Construct a AbstractCompositeExtractor based on the specified ValueExtractor array.

AbstractCompositeExtractor (ValueExtractor::View vE1, ValueExtractor::View vE2)

Construct a AbstractCompositeExtractor based on two ValueExtractors.

Protected Attributes

MemberView< ObjectArray >

m_vaExtractor

The ValueExtractor array.

Constructor & Destructor Documentation

AbstractCompositeExtractor ( ObjectArray::View vaExtractor ) [protected]

Construct a AbstractCompositeExtractor based on the specified ValueExtractor array.

Parameters:

vaExtractor

the ValueExtractor array

AbstractCompositeExtractor	(	ValueExtractor::View	vE1,
		ValueExtractor::View	vE2
	)			`[protected]`

Construct a AbstractCompositeExtractor based on two ValueExtractors.

Parameters:

	vaE1	the first ValueExtractor
	vaE2	the second ValueExtractor

Member Function Documentation

virtual bool equals ( Object::View v ) const [virtual]

Compare the AbstractCompositeExtractor with another object to determine equality.

Two AbstractCompositeExtractor objects are considered equal iff they belong to the same class and their underlying ValueExtractor arrays are deep-equal.

Returns:: true iff this AbstractCompositeExtractor and the passed object are equivalent

virtual ObjectArray::View getExtractors ( ) const [virtual]

Obtain the ValueExtractor array.

Returns:: the ValueExtractor array