299 lines
7.9 KiB
Plaintext
299 lines
7.9 KiB
Plaintext
/*
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* $Id$
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*/
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/*
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* OBJFUNC
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*
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* Contains additional object oriented functions
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*
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* Copyright (C) 1999 Eddie Runia (eddie@runia.com)
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* Part of the Harbour Project www.harbour-project.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version, with one exception:
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*
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* The exception is that if you link the Harbour Runtime Library (HRL)
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* and/or the Harbour Virtual Machine (HVM) with other files to produce
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* an executable, this does not by itself cause the resulting executable
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* to be covered by the GNU General Public License. Your use of that
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* executable is in no way restricted on account of linking the HRL
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* and/or HVM code into it.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA (or visit
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* their web site at http://www.gnu.org/).
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*
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* Partial Copyright Antonio Linares (alinares@fivetech.com)
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* partial copyright regarding function : aoData
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*/
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#define MET_METHOD 0
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#define MET_DATA 1
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#define MET_CLASSDATA 2
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#define MET_INLINE 3
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#define MET_VIRTUAL 4
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#define DATA_SYMBOL 1
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#define DATA_VAL 2
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//
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// <lRet> := IsData( <oObject>, <cSymbol> )
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//
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// Is the symbol present in the object as DATA ?
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//
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function IsData( oObject, cSymbol )
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return IsMessage( oObject, cSymbol ) .and. IsMessage( oObject, "_" + cSymbol )
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//
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// <lRet> := IsMethod( <oObject>, <cSymbol> )
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//
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// Is the symbol present in the object as METHOD ?
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//
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function IsMethod( oObject, cSymbol )
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return IsMessage( oObject, cSymbol ) .and. !IsMessage( oObject, "_" + cSymbol )
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//
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// <aData> aOData( <oObject>, [lDataMethod] )
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//
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// Return an array containing the names of all the data items of oObject.
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//
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// lDataMethod = .T. (default) Return all DATAs
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// .F. Return all METHODs
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//
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function aOData( oObject, lDataMethod )
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local aInfo := aSort( oObject:ClassSel() )
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local aData := {}
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local n := 1
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local nLen := Len( aInfo )
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local lFoundDM // Found DATA ?
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IF !(ValType(lDataMethod) == "L")
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lDataMethod := .T.
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ENDIF
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do while n <= nLen .and. Substr( aInfo[ n ], 1, 1 ) != "_"
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/* If in range and no set function found yet ( set functions begin with a */
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/* leading underscore ). */
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lFoundDM := !Empty( aScan( aInfo, "_" + aInfo[ n ], n + 1 ) )
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/* Find position of matching set function in array with all symbols */
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if lFoundDM == lDataMethod // If found -> DATA
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// else METHOD
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aAdd( aData, aInfo[ n ] )
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endif
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n++
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enddo
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return aData
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//
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// aData aOMethod( oObject )
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//
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// Return an array containing the names of all the method of oObject.
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//
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function aOMethod( oObject )
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return aOData( oObject, .F. )
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//
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// <aData> aOGet( <oObject>, [<aExcept>] )
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//
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// Basically the same as aOData except that it returns a 2D array
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// containing :
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//
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// [x][1] Symbol name
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// [x][2] Value of DATA
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//
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// aExcept is an optional list of DATA you do not want to collect
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//
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function aOGet( oObject, aExcept )
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local aDataSymbol := aoData( oObject )
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local nLen := Len( aDataSymbol )
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local aData := {}
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local cSymbol
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local n
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IF !(ValType(aExcept) == "A")
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aExcept := {}
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ENDIF
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for n := 1 to nLen
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cSymbol := aDataSymbol[ n ]
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if Empty( aScan( aExcept, cSymbol ) )
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aAdd( aData, { cSymbol, oSend( oObject, cSymbol ) } )
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endif
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next n
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return aData
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//
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// aOSet( <oObject>, <aData> )
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//
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// The reverse of aOGet. It puts an 2D array of DATA into an object.
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//
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function aOSet( oObject, aData )
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aEval( aData, ;
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{|aItem| oSend( oObject, "_"+aItem[DATA_SYMBOL], aItem[DATA_VAL] ) } )
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return oObject
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//
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// <oObj> := oAddMethod( <oObj>, <cSymbol>, <nFuncPtr> )
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//
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// Add a method to an already existing class
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//
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function oAddMethod( oObj, cSymbol, nFuncPtr )
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if IsMessage( oObj, cSymbol )
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QOut( "OADDMETHOD: ", cSymbol, " already exists in class." )
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elseif ValType( nFuncPtr ) != "N"
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QOut( "OADDMETHOD: Argument type error <nFuncPtr>" )
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elseif ValType( oObj ) != "O"
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QOut( "OADDMETHOD: Argument type error <oObj>" )
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else
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ClassAdd( oObj:ClassH, cSymbol, nFuncPtr, MET_METHOD )
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endif
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return oObj
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//
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// <oObj> := oAddInline( <oObj>, <cSymbol>, <bInline> )
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//
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// Add an INLINE to an already existing class
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//
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function oAddInline( oObj, cSymbol, bInline )
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if IsMessage( oObj, cSymbol )
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QOut( "OADDINLINE: ", cSymbol, " already exists in class." )
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elseif ValType( bInline ) != "B"
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QOut( "OADDINLINE: Argument type error <bInline>" )
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elseif ValType( oObj ) != "O"
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QOut( "OADDINLINE: Argument type error <oObj>" )
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else
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ClassAdd( oObj:ClassH, cSymbol, bInline, MET_INLINE )
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endif
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return oObj
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//
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// <oObj> := oAddData( <oObj>, <cSymbol> )
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//
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// Add a DATA to an already existing class
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//
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function oAddData( oObj, cSymbol )
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local nSeq
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if IsMessage( oObj, cSymbol ) .or. IsMessage( oObj, "_" + cSymbol )
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QOut( "OADDDATA: ", cSymbol, " already exists in class." )
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elseif ValType( oObj ) != "O"
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QOut( "OADDDATA: Argument type error <oObj>" )
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else
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nSeq := __wDataInc( oObj:ClassH ) // Allocate new Seq#
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ClassAdd( oObj:ClassH, cSymbol, nSeq, MET_DATA )
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ClassAdd( oObj:ClassH, "_" + cSymbol, nSeq, MET_DATA )
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endif
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return oObj
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//
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// <oObj> := oModMethod( <oObj>, <cSymbol>, <nFuncPtr> )
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//
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// Modify a method to an already existing class
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//
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function oModMethod( oObj, cSymbol, nFuncPtr )
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if !IsMethod( oObj, cSymbol )
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QOut( "OMODMETHOD: ", cSymbol, " does not exist in class." )
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elseif ValType( nFuncPtr ) != "N"
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QOut( "OMODMETHOD: Argument type error <nFuncPtr>" )
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elseif ValType( oObj ) != "O"
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QOut( "OMODMETHOD: Argument type error <oObj>" )
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else
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ClassMod( oObj:ClassH, cSymbol, nFuncPtr )
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endif
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return oObj
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//
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// <oObj> := oModInline( <oObj>, <cSymbol>, <bInline> )
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//
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// Modify an INLINE to an already existing class
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//
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function oModInline( oObj, cSymbol, bInline )
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if !IsMethod( oObj, cSymbol )
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QOut( "OMODINLINE: ", cSymbol, " does not exist in class." )
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elseif ValType( bInline ) != "B"
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QOut( "OMODINLINE: Argument type error <bInline>" )
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elseif ValType( oObj ) != "O"
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QOut( "OMODINLINE: Argument type error <oObj>" )
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else
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ClassMod( oObj:ClassH, cSymbol, bInline )
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endif
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return oObj
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//
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// <oObj> := oDelMethod( <oObj>, <cSymbol> )
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//
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// Delete a method from an already existing class
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//
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function oDelMethod( oObj, cSymbol )
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if !IsMethod( oObj, cSymbol )
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QOut( "ODELMETHOD: ", cSymbol, " does not exist in class." )
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elseif ValType( oObj ) != "O"
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QOut( "ODELMETHOD: Argument type error <oObj>" )
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else
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ClassDel( oObj:ClassH, cSymbol )
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endif
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return oObj
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function oDelInline( oObj, cSymbol )
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return oDelMethod( oObj, cSymbol ) // Same story
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//
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// <oObj> := oDelData( <oObj>, <cSymbol> )
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//
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// Delete a DATA from an already existing class
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//
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function oDelData( oObj, cSymbol )
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local nSeq
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if !IsData( oObj, cSymbol )
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QOut( "ODELDATA: ", cSymbol, " does not exist in class." )
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elseif ValType( oObj ) != "O"
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QOut( "ODELDATA: Argument type error <oObj>" )
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else
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ClassDel( oObj:ClassH, cSymbol, )
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ClassDel( oObj:ClassH, "_" + cSymbol )
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nSeq := __wDataDec( oObj:ClassH ) // Decrease wData
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endif
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return oObj
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