/**
* DataCleaner (community edition)
* Copyright (C) 2014 Neopost - Customer Information Management
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.datacleaner.beans.writers;
import java.util.Date;
import org.apache.metamodel.schema.Column;
import org.apache.metamodel.schema.ColumnType;
import org.datacleaner.components.convert.ConvertToBooleanTransformer;
import org.datacleaner.components.convert.ConvertToNumberTransformer;
/**
* Static utility class to convert a value from class Object to the type of a {@link Column} if possible.
*
*/
class TypeConverter {
static Object convertType(final Object value, final Column targetColumn) throws IllegalArgumentException {
if (value == null) {
return null;
}
Object result = value;
final ColumnType type = targetColumn.getType();
if (type.isLiteral()) {
// for strings, only convert some simple cases, since JDBC drivers
// typically also do a decent job here (with eg. Clob types, char[]
// types etc.)
if (value instanceof Number || value instanceof Date) {
result = value.toString();
}
} else if (type.isNumber()) {
final Number numberValue = ConvertToNumberTransformer.transformValue(value);
if (numberValue == null && !"".equals(value)) {
throw new IllegalArgumentException("Could not convert " + value + " to number");
}
result = numberValue;
} else if (type == ColumnType.BOOLEAN) {
final Boolean booleanValue = ConvertToBooleanTransformer.transformValue(value);
if (booleanValue == null && !"".equals(value)) {
throw new IllegalArgumentException("Could not convert " + value + " to boolean");
}
result = booleanValue;
}
return result;
}
}