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/* Copyright(C) 2011 Brazil
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "cursor-factory.hpp"
#include "id-cursor.hpp"
#include "key-cursor.hpp"
#include "prefix-cursor.hpp"
#include "predictive-cursor.hpp"
#include <new>
namespace grn {
namespace dat {
Cursor *CursorFactory::open(const Trie &trie,
const void *min_ptr, UInt32 min_length,
const void *max_ptr, UInt32 max_length,
UInt32 offset,
UInt32 limit,
UInt32 flags) {
const UInt32 cursor_type = flags & CURSOR_TYPE_MASK;
switch (cursor_type) {
case ID_RANGE_CURSOR: {
IdCursor *cursor = new (std::nothrow) IdCursor;
GRN_DAT_THROW_IF(MEMORY_ERROR, cursor == NULL);
try {
cursor->open(trie, String(min_ptr, min_length),
String(max_ptr, max_length), offset, limit, flags);
} catch (...) {
delete cursor;
throw;
}
return cursor;
}
case KEY_RANGE_CURSOR: {
KeyCursor *cursor = new (std::nothrow) KeyCursor;
GRN_DAT_THROW_IF(MEMORY_ERROR, cursor == NULL);
try {
cursor->open(trie, String(min_ptr, min_length),
String(max_ptr, max_length), offset, limit, flags);
} catch (...) {
delete cursor;
throw;
}
return cursor;
}
case PREFIX_CURSOR: {
PrefixCursor *cursor = new (std::nothrow) PrefixCursor;
GRN_DAT_THROW_IF(MEMORY_ERROR, cursor == NULL);
try {
cursor->open(trie, String(max_ptr, max_length), min_length,
offset, limit, flags);
} catch (...) {
delete cursor;
throw;
}
return cursor;
}
case PREDICTIVE_CURSOR: {
PredictiveCursor *cursor = new (std::nothrow) PredictiveCursor;
GRN_DAT_THROW_IF(MEMORY_ERROR, cursor == NULL);
try {
cursor->open(trie, String(min_ptr, min_length),
offset, limit, flags);
} catch (...) {
delete cursor;
throw;
}
return cursor;
}
default: {
GRN_DAT_THROW(PARAM_ERROR, "unknown cursor type");
}
}
}
} // namespace dat
} // namespace grn
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