Oracle Coherence for C++ API
Release 3.7.1.0

E22845-01

ConverterCollections::ConverterMap Class Reference

#include <coherence/util/ConverterCollections.hpp>

Inherits WrapperCollections::AbstractWrapperMap.

Inherited by ConverterCollections::ConverterConcurrentMap, ConverterCollections::ConverterInvocableMap, ConverterCollections::ConverterObservableMap, and ConverterCollections::ConverterQueryMap.

List of all members.


Detailed Description

A ConverterMap views an underlying Map through a Converter.
 

Public Types

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

Public Member Functions

virtual bool containsKey (Object::View vKey) const
 Return true if this map contains a mapping for the specified key.

Parameters:
 vKey key whose presence in this map is to be tested.
Returns:
true if this map contains a mapping for the specified key.
virtual bool containsValue (Object::View vValue) const
 Return true if this map maps one or more keys to the specified value.

This operation will probably require time linear in the map size for most implementations of the Map interface.

Parameters:
 vValue value whose presence in this map is to be tested.
Returns:
true if this map maps one or more keys to the specified value.
virtual Object::Holder get (Object::View vKey) const
 Return the value to which this map maps the specified key.

Return NULL if the map contains no mapping for this key. A return value of NULL does not necessarily indicate that the map contains no mapping for the key; it's also possible that the map explicitly maps the key to NULL. The containsKey operation may be used to distinguish these two cases.

Parameters:
 vKey key whose associated value is to be returned.
Returns:
the value to which this map maps the specified key, or NULL if the map contains no mapping for this key.
See also:
containsKey()
virtual Object::Holder put (Object::View vKey, Object::Holder ohValue)
 Associate the specified value with the specified key in this map.

If the map previously contained a mapping for this key, the old value is replaced by the specified value.

Parameters:
 vKey key with which the specified value is to be associated.
 ohValue value to be associated with the specified key.
Returns:
previous value associated with specified key, or NULL if there was no mapping for key. A NULL return can also indicate that the map previously associated NULL with the specified key.
Exceptions:
 coherence::lang::UnsupportedOperationException if the put() operation is not supported by this map.
virtual Object::Holder remove (Object::View vKey)
 Remove the mapping for this key from this map if it is present.

Return the value to which the map previously associated the key, or NULL if the map contained no mapping for this key. (A NULL return can also indicate that the map previously associated NULL with the specified key.) The map will not contain a mapping for the specified key once the call returns.

Parameters:
 vKey key whose mapping is to be removed from the map.
Returns:
previous value associated with specified key, or NULL if there was no mapping for key.
Exceptions:
 coherence::lang::UnsupportedOperationException if the remove() operation is not supported by this map.
virtual void putAll (Map::View vMap)
 Copy all of the mappings from the specified map to this map.

The effect of this call is equivalent to that of calling put(k, v) on this map once for each mapping from key k to value v in the specified map. The behavior of this operation is unspecified if the specified map is modified while the operation is in progress.

Parameters:
 vMap mappings to be stored in this map.
Exceptions:
 coherence::lang::UnsupportedOperationException if the put() operation is not supported by this map.
virtual Set::View keySet () const
 Return a set of the keys contained in this map.

The set is backed by the map, so changes to the map are reflected in the set. If the map is modified while an iteration over the set is in progress, the results of the iteration are undefined.

Returns:
a set of the keys contained in this map.
virtual Set::Handle keySet ()
 Return a set of the keys contained in this map.

The set is backed by the map, so changes to one are reflected in the other. If the map is modified while an iteration over the set is in progress, the results of the iteration are undefined.

Returns:
a set of the keys contained in this map.
virtual Collection::View values () const
 Return a collection of the values contained in this map.

The collection is backed by the map, so changes to the map are reflected in the set. If the map is modified while an iteration over the collection is in progress, the results of the iteration are undefined.

Returns:
a collection of the values contained in this map.
virtual
Collection::Handle 
values ()
 Return a collection of the values contained in this map.

The collection is backed by the map, so changes to one are reflected in the other. If the map is modified while an iteration over the collection is in progress, the results of the iteration are undefined.

Returns:
a collection of the values contained in this map.
virtual Set::View entrySet () const
 Return a set of the mappings contained in this map.

Each element in the returned set is a Map::Entry::View. The set is backed by the map, so changes to the map are reflected in the set. If the map is modified while an iteration over the set is in progress, the results of the iteration are undefined.

Returns:
a set of the mappings contained in this map.
virtual Set::Handle entrySet ()
 Return a set of the mappings contained in this map.

Each element in the returned set is a Map::Entry::Handle. The set is backed by the map, so changes to one are reflected in the other. If the map is modified while an iteration over the set is in progress, the results of the iteration are undefined.

Returns:
a set of the mappings contained in this map.
virtual bool equals (Object::View that) 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 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
EntryConverter::View 
getUpConverter () const
 Get the up converter, which is used to convert from the underlying entries in the Map.
virtual
EntryConverter::View 
getDownConverter () const
 Get the down converter, which is used to convert to the underlying entries in the Map.

Protected Member Functions

 ConverterMap (Map::Handle hMapDelegate, EntryConverter::View vConvUp, EntryConverter::View vConvDown)
 Create a WrapperCollections::AbstractWrapperMap which delegates to the specified Map.
 ConverterMap (Map::View vMapDelegate, EntryConverter::View vConvUp, EntryConverter::View vConvDown)
 Create a WrapperCollections::AbstractWrapperMap which delegates to the specified Map.
 ConverterMap (const ConverterMap &that)
 Copy constructor.

Protected Attributes

FinalView
< EntryConverter
m_vConvUp
 The Converter from the underlying entries in the Map.
FinalView
< EntryConverter
m_vConvDown
 The Converter to the underlying entries in the Map.

Constructor & Destructor Documentation

ConverterMap ( Map::Handle  hMapDelegate,
    EntryConverter::View  vConvUp,
    EntryConverter::View  vConvDown 
  )    [protected]

Create a WrapperCollections::AbstractWrapperMap which delegates to the specified Map.

Parameters:
 hMap the specified Map
 vConvUp the EntryConverter from the underlying Map
 vConvDown the EntryConverter to the underlying Map

ConverterMap ( Map::View  vMapDelegate,
    EntryConverter::View  vConvUp,
    EntryConverter::View  vConvDown 
  )    [protected]

Create a WrapperCollections::AbstractWrapperMap which delegates to the specified Map.

Parameters:
 vMap the specified Map
 vConvUp the EntryConverter from the underlying Map
 vConvDown the EntryConverter to the underlying Map


Member Function Documentation

virtual EntryConverter::View getUpConverter (  )  const [virtual]

Get the up converter, which is used to convert from the underlying entries in the Map.

Returns:
the up converter

virtual EntryConverter::View getDownConverter (  )  const [virtual]

Get the down converter, which is used to convert to the underlying entries in the Map.

Returns:
the down converter


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