package com.tesora.dve.db.mysql;
/*
* #%L
* Tesora Inc.
* Database Virtualization Engine
* %%
* Copyright (C) 2011 - 2014 Tesora Inc.
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
* #L%
*/
import com.tesora.dve.charset.NativeCharSet;
import com.tesora.dve.charset.MysqlNativeCharSetCatalog;
import com.tesora.dve.db.DBNative;
import com.tesora.dve.db.mysql.portal.protocol.MyBackendDecoder;
import com.tesora.dve.exceptions.PECodingException;
import com.tesora.dve.exceptions.PEException;
import com.tesora.dve.server.global.HostService;
import com.tesora.dve.singleton.Singletons;
public class CharsetDecodeHelper implements MyBackendDecoder.CharsetDecodeHelper {
@Override
public boolean typeSupported(MyFieldType fieldType, short flags, int maxDataLen) {
boolean supported;MysqlNativeType mnt;
try {
mnt = ((MysqlNative) Singletons.require(DBNative.class)).getNativeTypeFromMyFieldType(fieldType, flags, maxDataLen);
} catch (PEException e) {
throw new PECodingException("Couldn't lookup native type", e);
}
supported = (mnt != null);
return supported;
}
@Override
public long lookupMaxLength(byte charSet) {
long maxCharLength;NativeCharSet cs = MysqlNativeCharSetCatalog.DEFAULT_CATALOG.findNativeCharsetById(charSet);
if (cs == null)
throw new PECodingException("Column definition gets unsupported character set (" + charSet + ")");
maxCharLength = cs.getMaxLen();
return maxCharLength;
}
}