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/* IXAttributeQuery.h Copyright 1991, NeXT Computer, Inc. */ #import <objc/Object.h> #import <objc/hashtable.h> #import "protocols.h" @class IXAttributeParser; @class IXPostingList; /* This class performs query processing based on the NeXT IndexingKit query */ /* language, documented on- line and in print. Classes that can be queried */ /* include IXAttributeParser, IXFileFinder, IXFileRecord, and IXRecordManager.*/ @interface IXAttributeQuery: Object { NXZone *_queryZone; id _queryBinder; BOOL _freeBinder; NXHashTable *_objectTable; NXHashTable *_opaqueTable; NXHashTable *_namingTable; struct TermRecord *_queryParse; struct TermRecord *_queryStack; id attributeParser; id queryContext; unsigned char *queryString; } /* the parser processes text enclosed by the parse operator.*/ - initQueryString:(const char *)string andAttributeParser:(IXAttributeParser *)aParser; /* evaluates the query string against an object that has attribute bindings.*/ /* first, we request the attribute binder. if nil, we request the bindings.*/ - (IXPostingList *)evaluateFor:(id <IXAttributeBinding>)anObject; - (char *)attributeNames; /* a new line separated list; caller must free.*/ - (IXAttributeParser *)attributeParser; /* the one used by the parse operator.*/ - (const char *)queryString; /* returns the query string used to initialize.*/ @end
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