Oracle Coherence for C++ API
Release 3.7.1.0

E22845-01

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< ObjectArraym_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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