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54 lines
1.8 KiB
Plaintext
Executable File
54 lines
1.8 KiB
Plaintext
Executable File
-- File: Transfer_Mapper.cdl
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-- Created: Fri Nov 4 10:47:55 1994
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-- Author: Christian CAILLET
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-- <cky@anion>
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---Copyright: Matra Datavision 1994
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generic class Mapper from Transfer
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(TheKey as any;
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TheHasher as any;
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TheInfo as any)
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inherits Finder
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---Purpose : a Mapper defines a Finder for a specific input class
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-- its definition includes the value of the Key to be mapped,
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-- and the HashCoder associated to the class of the Key
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--
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-- TheKey defines the class to be keyed
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-- TheHasher is the associated Hasher
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-- TheInfo is an additionnal class which helps to provide
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-- informations on the value (template : see DataInfo)
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uses CString
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is
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Create (akey : any TheKey) returns mutable Mapper;
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---Purpose : Creates a Mapper with a Value. This Value can then not be
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-- changed. It is used by the Hasher to compute the HashCode,
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-- which will then be stored for an immediate reading.
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Value (me) returns any TheKey is static;
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---Purpose : Returns the contained value
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---C++ : return const &
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Equates (me; other : Finder) returns Boolean;
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---Purpose : Specific testof equallity : defined as False if <other> has
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-- not the same true Type, else contents are compared (by
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-- C++ operator ==)
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ValueType (me) returns Type is redefined;
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---Purpose : Returns the Type of the Value. By default, returns the
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-- DynamicType of <me>, but can be redefined
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ValueTypeName (me) returns CString is redefined;
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---Purpose : Returns the name of the Type of the Value. Default is name
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-- of ValueType, unless it is for a non-handled object
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fields
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theval : TheKey;
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end Mapper;
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