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+#ifndef LPC_INDEX_H1105549284_INCLUDE_GUARD_
+#define LPC_INDEX_H1105549284_INCLUDE_GUARD_
+
+/* This file is part of indexlib.
+ * Copyright (C) 2005 Luís Pedro Coelho <[email protected]>
+ *
+ * Indexlib is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation and available as file
+ * GPL_V2 which is distributed along with indexlib.
+ *
+ * Indexlib is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA
+ *
+ * In addition, as a special exception, the copyright holders give
+ * permission to link the code of this program with any edition of
+ * the Qt library by Trolltech AS, Norway (or with modified versions
+ * of Qt that use the same license as Qt), and distribute linked
+ * combinations including the two. You must obey the GNU General
+ * Public License in all respects for all of the code used other than
+ * Qt. If you modify this file, you may extend this exception to
+ * your version of the file, but you are not obligated to do so. If
+ * you do not wish to do so, delete this exception statement from
+ * your version.
+ */
+
+#include <vector>
+#include <string>
+#include <memory>
+
+namespace indexlib {
+/**
+ * Represents a result set
+ *
+ * The reason we do not return directly the answer set is twofold ( though connected )
+ *
+ * - We may decide to partially compute the set in the result list() method
+ * - The possibility of implementing result_type::search to more efficiently handle repeated searches
+ */
+struct result {
+ public:
+ virtual ~result() { }
+ /**
+ * The answer set
+ */
+ virtual std::vector<unsigned> list() const = 0;
+ /**
+ * A new search.
+ *
+ * The reason for this function is that if the user is typing and we do repeated searches for
+ * "s", "st", "str", "stri" ... "string" we may (depending on the particular implementation)
+ * reuse the previous results for a speedup.
+ *
+ * @return null if the type does not support this or the particular search string makes it impossible to
+ * fulfill the search request.
+ */
+ virtual std::auto_ptr<result> search( const char* ) = 0;
+};
+
+struct index {
+ public:
+ virtual ~index() { }
+ /**
+ * Adds the document \param str under the name \param docname
+ */
+ virtual void add( const char* str, const char* docname ) = 0;
+ /**
+ * \see add( const char*, const char* );
+ */
+ virtual void add( std::string s, std::string d ) { add( s.c_str(), d.c_str() ); }
+
+ /**
+ * Removes the doc known as docname.
+ *
+ * In most implementations of index, this will probably be implemented by marking
+ * the document as deleted in some way and maintenance() will need to be called later.
+ */
+ virtual void remove_doc( const char* doc ) = 0;
+ void remove_doc( std::string doc ) { remove_doc( doc.c_str() ); }
+
+ /**
+ * Perform any maintenance tasks necessary.
+ *
+ * Should be called every so often, but it can take some time to perform these operations,
+ * so call them when the app is idle.
+ */
+ virtual void maintenance() { }
+
+ /**
+ * Returns all documents matching \param pattern.
+ */
+ virtual std::auto_ptr<result> search( const char* pattern ) const = 0;
+
+ /**
+ * Returns the number of docs indexed.
+ */
+ virtual unsigned ndocs() const = 0;
+ /**
+ * Since docs are returned by index, there names need to be looked up.
+ */
+ virtual std::string lookup_docname( unsigned ) const = 0;
+ private:
+};
+}
+
+#endif /* LPC_INDEX_H1105549284_INCLUDE_GUARD_ */
+