Oracle Fusion Middleware C++ API Reference for Oracle Coherence: ChainedExtractor Class Reference

Detailed Description

ValueExtractor

The extractors in the array are applied sequentially left-to-right, so a result of a previous extractor serves as a target object for a next one.

Author:

djl 2008.03.07

Public Types

typedef spec::Handle

Handle

ChainedExtractor Handle definition.

typedef spec::View

View

ChainedExtractor View definition.

typedef spec::Holder

Holder

ChainedExtractor 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.

Parameters:

ohTarget

an Object to retrieve the value from

Returns:: the extracted value; NULL is an acceptable value

Exceptions:

	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 Object::Holder

extractFromEntry (Map::Entry::Holder ohEntry) const

Extract the value from the passed entry.

Static Public Member Functions

static ObjectArray::View

createExtractors (String::View vsName)

Parse a dot-delimited sequence of method names and instantiate a corresponding array of ReflectionExtractor objects.

Protected Member Functions

ChainedExtractor ()

Default constructor (necessary for the PortableObject interface).

ChainedExtractor (ObjectArray::View vaExtractor)

Return a ChainedExtractor based on a specified array.

ChainedExtractor (ValueExtractor::View vExtractor1, ValueExtractor::View vExtractor2)

Construct a ChainedExtractor based on two extractors.

Constructor & Destructor Documentation

ChainedExtractor ( ObjectArray::View vaExtractor ) [protected]

Return a ChainedExtractor based on a specified array.

Parameters:

vaExtractor

the ValueExtractor array

ChainedExtractor	(	ValueExtractor::View	vExtractor1,
		ValueExtractor::View	vExtractor2
	)			`[protected]`

Construct a ChainedExtractor based on two extractors.

Parameters:

	vExtractor1	the ValueExtractor
	vExtractor2	the ValueExtractor

Member Function Documentation

virtual Object::Holder extractFromEntry ( Map::Entry::Holder ohEntry ) const [virtual]

Extract the value from the passed entry.

The underlying extractors are applied sequentially, so a result of a previous extractor serves as a target object for a next one. A value of null prevents any further extractions and is returned immediately. For intrinsic types, the returned value is expected to be a standard wrapper type in the same manner that reflection works; for example, int would be returned as a Integer32.

Reimplemented from AbstractExtractor.

static ObjectArray::View createExtractors ( String::View vsName ) [static]

Parse a dot-delimited sequence of method names and instantiate a corresponding array of ReflectionExtractor objects.

Parameters:

vsName

a dot-delimited sequence of method names

Returns:: an array of ReflectionExtractor objects