Oracle Coherence for C++ API
TypedExtractor Class Template Reference
Inherited by BoxExtractor.
List of all members.
template<class R, class C, R(C::*)() const M, class RH = Object::Holder, class OH = typename C::Holder>
Template based ValueExtractor implementation.
class coherence::util::extractor::TypedExtractor< R, C, M, RH, OH >
This extractor functions on const methods which return Objects, for an extractor which works with non-Object return types see BoxExtractor.
For ease of use the COH_TYPED_EXTRACTOR macro can be used to easily construct an instance of this class. For example the following constructs an extractor for calling the "String::View Address::getState() const" method.
- mf 2009.03.20
- See also:
typedef spec::Handle ||Handle|
| ||TypedExtractor<R, C, M, RH, OH> Handle definition. |
typedef spec::View ||View|
| ||TypedExtractor<R, C, M, RH, OH> View definition. |
typedef spec::Holder ||Holder|
| ||TypedExtractor<R, C, M, RH, OH> Holder definition. |
Public Member Functions
virtual Object::Holder ||extract (Object::Holder ohTarget) const |
| ||Extract the value from the passed object.|
The returned value may be NULL.
|ohTarget ||an Object to retrieve the value from|
- the extracted value; NULL is an acceptable value
|ClassCastException ||if this ValueExtractor is incompatible with the passed object to extract a value from and the implementation requires the passed object to be of a certain type |
|Exception ||if this ValueExtractor encounters an exception in the course of extracting the value |
|IllegalArgumentException ||if this ValueExtractor cannot handle the passed object for any other reason; an implementor should include a descriptive message|
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
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
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.
|out ||the stream used to output the description|
Protected Member Functions
| ||Construct a TypedExtractor. |
| ||TypedExtractor (String::View vsMethod)|
| ||Construct a TypedExtractor based on a method name and optional parameters. |
Constructor & Destructor Documentation
Construct a TypedExtractor based on a method name and optional parameters.
The method name is only used for the purposes of serializing the extractor for execution on remote Java members.
|vsMethod ||the name of the method to invoke via reflection |
The documentation for this class was generated from the following file:
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