com.datastax.oss.driver.internal.core.type.codec.CqlDurationCodec Maven / Gradle / Ivy
The newest version!
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.datastax.oss.driver.internal.core.type.codec;
import com.datastax.oss.driver.api.core.ProtocolVersion;
import com.datastax.oss.driver.api.core.data.CqlDuration;
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.datastax.oss.driver.internal.core.type.util.VIntCoding;
import com.datastax.oss.driver.shaded.guava.common.io.ByteArrayDataOutput;
import com.datastax.oss.driver.shaded.guava.common.io.ByteStreams;
import com.datastax.oss.protocol.internal.util.Bytes;
import edu.umd.cs.findbugs.annotations.NonNull;
import edu.umd.cs.findbugs.annotations.Nullable;
import java.io.DataInput;
import java.io.IOException;
import java.nio.ByteBuffer;
import net.jcip.annotations.ThreadSafe;
@ThreadSafe
public class CqlDurationCodec implements TypeCodec {
@NonNull
@Override
public GenericType getJavaType() {
return GenericType.CQL_DURATION;
}
@NonNull
@Override
public DataType getCqlType() {
return DataTypes.DURATION;
}
@Override
public boolean accepts(@NonNull Object value) {
return value instanceof CqlDuration;
}
@Override
public boolean accepts(@NonNull Class javaClass) {
return javaClass == CqlDuration.class;
}
@Nullable
@Override
public ByteBuffer encode(@Nullable CqlDuration value, @NonNull ProtocolVersion protocolVersion) {
if (value == null) {
return null;
}
long months = value.getMonths();
long days = value.getDays();
long nanoseconds = value.getNanoseconds();
int size =
VIntCoding.computeVIntSize(months)
+ VIntCoding.computeVIntSize(days)
+ VIntCoding.computeVIntSize(nanoseconds);
ByteArrayDataOutput out = ByteStreams.newDataOutput(size);
try {
VIntCoding.writeVInt(months, out);
VIntCoding.writeVInt(days, out);
VIntCoding.writeVInt(nanoseconds, out);
} catch (IOException e) {
// cannot happen
throw new AssertionError();
}
return ByteBuffer.wrap(out.toByteArray());
}
@Nullable
@Override
public CqlDuration decode(@Nullable ByteBuffer bytes, @NonNull ProtocolVersion protocolVersion) {
if (bytes == null || bytes.remaining() == 0) {
return null;
} else {
DataInput in = ByteStreams.newDataInput(Bytes.getArray(bytes));
try {
int months = (int) VIntCoding.readVInt(in);
int days = (int) VIntCoding.readVInt(in);
long nanoseconds = VIntCoding.readVInt(in);
return CqlDuration.newInstance(months, days, nanoseconds);
} catch (IOException e) {
// cannot happen
throw new AssertionError();
}
}
}
@NonNull
@Override
public String format(@Nullable CqlDuration value) {
return (value == null) ? "NULL" : value.toString();
}
@Nullable
@Override
public CqlDuration parse(@Nullable String value) {
return (value == null || value.isEmpty() || value.equalsIgnoreCase("NULL"))
? null
: CqlDuration.from(value);
}
}