io.vertx.db2client.impl.codec.DB2ParamDesc Maven / Gradle / Ivy
/*
* Copyright (C) 2019,2020 IBM Corporation
*
* 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 io.vertx.db2client.impl.codec;
import io.vertx.core.buffer.Buffer;
import io.vertx.db2client.impl.drda.ClientTypes;
import io.vertx.db2client.impl.drda.ColumnMetaData;
import io.vertx.sqlclient.data.Numeric;
import io.vertx.sqlclient.impl.ErrorMessageFactory;
import io.vertx.sqlclient.impl.ParamDesc;
import io.vertx.sqlclient.impl.TupleInternal;
class DB2ParamDesc extends ParamDesc {
private final ColumnMetaData paramDefinitions;
DB2ParamDesc(ColumnMetaData paramDefinitions) {
this.paramDefinitions = paramDefinitions;
}
ColumnMetaData paramDefinitions() {
return paramDefinitions;
}
public String prepare(TupleInternal values) {
if (values.size() != paramDefinitions.columns_) {
return ErrorMessageFactory.buildWhenArgumentsLengthNotMatched(paramDefinitions.columns_, values.size());
}
for (int i = 0; i < paramDefinitions.columns_; i++) {
Object val = values.getValue(i);
int type = paramDefinitions.types_[i];
if (!canConvert(val, type)) {
Class preferredType = ClientTypes.preferredJavaType(type);
return ErrorMessageFactory.buildWhenArgumentsTypeNotMatched(preferredType, i, val);
}
}
return null;
}
private static boolean canConvert(Object val, int type) {
if (val == null)
return true;
if (ClientTypes.canConvert(val, type))
return true;
Class clazz = val.getClass();
switch (type) {
case ClientTypes.BIGINT:
case ClientTypes.BOOLEAN:
case ClientTypes.DECIMAL:
case ClientTypes.DOUBLE:
case ClientTypes.INTEGER:
case ClientTypes.REAL:
case ClientTypes.SMALLINT:
return clazz == Numeric.class;
case ClientTypes.VARCHAR:
return Enum.class.isAssignableFrom(clazz) || Buffer.class.isAssignableFrom(clazz);
case ClientTypes.VARBINARY:
return Buffer.class.isAssignableFrom(clazz);
}
return false;
}
}