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* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

* http://www.apache.org/licenses/LICENSE-2.0

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

package org.lmdbjava;

import static jnr.constants.ConstantSet.getConstantSet;

import jnr.constants.Constant;

import jnr.constants.ConstantSet;

import org.lmdbjava.Txn.BadException;

import org.lmdbjava.Txn.BadReaderLockException;

import org.lmdbjava.Txn.TxFullException;

/**

* Maps a LMDB C result code to the equivalent Java exception.

* <p>The immutable nature of all LMDB exceptions means the mapper internally maintains a table of

* them.

final class ResultCodeMapper {

/** Successful result. */

static final int MDB_SUCCESS = 0;

private static final ConstantSet CONSTANTS;

private static final String POSIX_ERR_NO = "Errno";

static {

CONSTANTS = getConstantSet(POSIX_ERR_NO);

}

private ResultCodeMapper() {}

/**

* Checks the result code and raises an exception is not {@link #MDB_SUCCESS}.

* @param rc the LMDB result code

static void checkRc(final int rc) {

switch (rc) {

case MDB_SUCCESS:

return;

case Dbi.BadDbiException.MDB_BAD_DBI:

throw new Dbi.BadDbiException();

case BadReaderLockException.MDB_BAD_RSLOT:

throw new BadReaderLockException();

case BadException.MDB_BAD_TXN:

throw new BadException();

case Dbi.BadValueSizeException.MDB_BAD_VALSIZE:

throw new Dbi.BadValueSizeException();

case LmdbNativeException.PageCorruptedException.MDB_CORRUPTED:

throw new LmdbNativeException.PageCorruptedException();

case Cursor.FullException.MDB_CURSOR_FULL:

throw new Cursor.FullException();

case Dbi.DbFullException.MDB_DBS_FULL:

throw new Dbi.DbFullException();

case Dbi.IncompatibleException.MDB_INCOMPATIBLE:

throw new Dbi.IncompatibleException();

case Env.FileInvalidException.MDB_INVALID:

throw new Env.FileInvalidException();

case Dbi.KeyExistsException.MDB_KEYEXIST:

throw new Dbi.KeyExistsException();

case Env.MapFullException.MDB_MAP_FULL:

throw new Env.MapFullException();

case Dbi.MapResizedException.MDB_MAP_RESIZED:

throw new Dbi.MapResizedException();

case Dbi.KeyNotFoundException.MDB_NOTFOUND:

throw new Dbi.KeyNotFoundException();

case LmdbNativeException.PageFullException.MDB_PAGE_FULL:

throw new LmdbNativeException.PageFullException();

case LmdbNativeException.PageNotFoundException.MDB_PAGE_NOTFOUND:

throw new LmdbNativeException.PageNotFoundException();

case LmdbNativeException.PanicException.MDB_PANIC:

throw new LmdbNativeException.PanicException();

case Env.ReadersFullException.MDB_READERS_FULL:

throw new Env.ReadersFullException();

case LmdbNativeException.TlsFullException.MDB_TLS_FULL:

throw new LmdbNativeException.TlsFullException();

case TxFullException.MDB_TXN_FULL:

throw new TxFullException();

case Env.VersionMismatchException.MDB_VERSION_MISMATCH:

throw new Env.VersionMismatchException();

default:

break;

}

final Constant constant = CONSTANTS.getConstant(rc);

if (constant == null) {

throw new IllegalArgumentException("Unknown result code " + rc);

}

final String msg = constant.name() + " " + constant.toString();

throw new LmdbNativeException.ConstantDerivedException(rc, msg);

}