org.simpleflatmapper.datastax.impl.getter.DatastaxGenericBigIntegerGetter Maven / Gradle / Ivy
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Cassandra Datastax SFM supports.
package org.simpleflatmapper.datastax.impl.getter;
import com.datastax.driver.core.DataType;
import com.datastax.driver.core.GettableByIndexData;
import org.simpleflatmapper.datastax.DataTypeHelper;
import org.simpleflatmapper.reflect.Getter;
import java.math.BigInteger;
public class DatastaxGenericBigIntegerGetter implements Getter {
private final int index;
private final DataType.Name dataTypeName;
public DatastaxGenericBigIntegerGetter(int index, DataType dataType) {
this.index = index;
this.dataTypeName = validateName(dataType);
}
private DataType.Name validateName(DataType dataType) {
if (DataTypeHelper.isNumber(dataType)) {
return dataType.getName();
}
throw new IllegalArgumentException("DataType " + dataType + "is not a number");
}
@Override
public BigInteger get(GettableByIndexData target) throws Exception {
if (target.isNull(index)) {
return null;
}
switch (dataTypeName) {
case BIGINT:
case COUNTER:
return BigInteger.valueOf(target.getLong(index));
case VARINT:
return target.getVarint(index);
case INT:
return BigInteger.valueOf(target.getInt(index));
case DECIMAL:
return target.getDecimal(index).toBigInteger();
case FLOAT:
return BigInteger.valueOf((long) target.getFloat(index));
case DOUBLE:
return BigInteger.valueOf((long) target.getDouble(index));
case SMALLINT:
return BigInteger.valueOf((long) target.getShort(index));
case TINYINT:
return BigInteger.valueOf((long) target.getByte(index));
case TIME:
return BigInteger.valueOf((long) target.getTime(index));
}
return null;
}
}