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1.1 ! root 1: {\rtf0\ansi{\fonttbl\f0\fswiss Helvetica;\f1\fmodern Ohlfs;} ! 2: \paperw11440 ! 3: \paperh11780 ! 4: \margl120 ! 5: \margr120 ! 6: {\colortbl;\red0\green0\blue0;} ! 7: \pard\tx1600\tx3200\tx4800\tx6400\tx8000\tx9600\tx11200\tx12800\tx14400\tx16000\f0\b0\i0\ulnone\fs72\fc0\cf0 DataSource.app\ ! 8: ! 9: \fs24 SHL Object Technology Center\ ! 10: e-mail: [email protected]\ ! 11: \ ! 12: \ ! 13: \ ! 14: ! 15: \pard\tx960\tx1920\tx2880\tx3840\tx4800\tx5760\tx6720\tx7680\tx8640\tx9600\b\fs36\fc0\cf0 Overview ! 16: \b0\fs24 \ ! 17: \ ! 18: ! 19: \pard\tx560\tx1120\tx1680\tx2240\tx2800\tx3360\tx3920\tx4480\tx5040\tx5600\fc1\cf1 This example demonstrates how you can implement a custom data source by creating an object that conforms to the EODataSources protocol. From an EOController perspective (UI layer), a persistent store (ie. a database) is not required, just an object that conforms to the EODataSources protocol. Thus you can take advantage of the features found in EOController (buffering, undo, etc) without having a real database by implementing a custom data source.\ ! 20: \ ! 21: ! 22: \fc0\cf0 NEXTSTEP 3.2 and EOF Release 1.0\ ! 23: ! 24: \fc1\cf1 ! 25: \pard\tx960\tx1920\tx2880\tx3840\tx4800\tx5760\tx6720\tx7680\tx8640\tx9600\fc1\cf1 \ ! 26: \ ! 27: \ ! 28: ! 29: \b\fs36 Program Organization ! 30: \b0\fs24 \ ! 31: \ ! 32: ! 33: \pard\tx560\tx1120\tx1680\tx2240\tx2800\tx3360\tx3920\tx4480\tx5040\tx5600\i\fc1\cf1 Important Files ! 34: \i0 \ ! 35: \ ! 36: DataSource.[hm] conforms to the EODataSources protocol.\ ! 37: Motorcycle.[hm] is the class of objects provided by the data source.\ ! 38: Images (folder) contains some motorcycle images you can use for inserts / updates. ! 39: \pard\tx1920\tx2880\tx3840\tx4800\tx5760\tx6720\tx7680\tx8640\tx9600\fi-1900\li1900\fc1\cf1 \ ! 40: ! 41: \pard\tx560\tx1120\tx1680\tx2240\tx2800\tx3360\tx3920\tx4480\tx5040\tx5600\fc1\cf1 \ ! 42: ! 43: \pard\tx1140\tx2300\tx3440\tx4600\tx5760\tx6900\tx8060\tx9200\tx10360\tx11520\fc1\cf1 \ ! 44: ! 45: \b\fs36 Revision History ! 46: \b0\fs24 \ ! 47: \ ! 48: June 94 Version 1.0.\ ! 49: ! 50: }
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