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JDBC wrapper of the Java Driver for Apache Cassandra®.
/*
*
* 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 com.ing.data.cassandra.jdbc.codec;
import com.datastax.oss.driver.api.core.ProtocolVersion;
import com.datastax.oss.driver.api.core.type.DataType;
import com.datastax.oss.driver.api.core.type.DataTypes;
import com.datastax.oss.driver.api.core.type.codec.TypeCodec;
import com.datastax.oss.driver.api.core.type.reflect.GenericType;
import com.ing.data.cassandra.jdbc.utils.ByteBufferUtil;
import javax.annotation.Nonnull;
import java.nio.ByteBuffer;
/**
* Manages the two-way conversion between the CQL type {@link DataTypes#DECIMAL} and the Java type {@link Double}.
*/
public class DecimalToDoubleCodec extends AbstractCodec implements TypeCodec {
/**
* Constructor for {@code DecimalToDoubleCodec}.
*/
public DecimalToDoubleCodec() {
}
@Nonnull
@Override
public GenericType getJavaType() {
return GenericType.DOUBLE;
}
@Nonnull
@Override
public DataType getCqlType() {
return DataTypes.DECIMAL;
}
@Override
public ByteBuffer encode(final Double value, @Nonnull final ProtocolVersion protocolVersion) {
if (value == null) {
return null;
}
return ByteBufferUtil.bytes(value);
}
@Override
public Double decode(final ByteBuffer bytes, @Nonnull final ProtocolVersion protocolVersion) {
if (bytes == null) {
return null;
}
// always duplicate the ByteBuffer instance before consuming it!
return ByteBufferUtil.toDouble(bytes.duplicate());
}
@Override
Double parseNonNull(@Nonnull final String value) {
return Double.valueOf(value);
}
@Override
String formatNonNull(@Nonnull final Double value) {
return String.valueOf(value);
}
}