Oracle Coherence for C++ API
Release 3.6.1.0

E18813-01

AbstractCompositeExtractor Class Reference

#include <coherence/util/extractor/AbstractCompositeExtractor.hpp>

Inherits AbstractExtractor.

Inherited by ChainedExtractor, ComparisonValueExtractor, and MultiExtractor.

List of all members.


Detailed Description

Abstract super class for ValueExtractor implementations that are based on an underlying array of ValueExtractor objects.
Author:
djl 2008.03.05

Public Types

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

Public Member Functions

virtual void  readExternal (PofReader::Handle hIn)
 
virtual void  writeExternal (PofWriter::Handle hOut) const
 
virtual bool  equals (Object::View v) const
  Compare the AbstractCompositeExtractor with another object to determine equality.
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.

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

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