com.datastax.oss.protocol.internal.request.Prepare Maven / Gradle / Ivy
/*
* Copyright DataStax, Inc.
*
* 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.datastax.oss.protocol.internal.request;
import static com.datastax.oss.protocol.internal.ProtocolConstants.Version.V5;
import com.datastax.oss.protocol.internal.Message;
import com.datastax.oss.protocol.internal.PrimitiveCodec;
import com.datastax.oss.protocol.internal.PrimitiveSizes;
import com.datastax.oss.protocol.internal.ProtocolConstants;
public class Prepare extends Message {
public final String cqlQuery;
public final String keyspace;
public Prepare(String cqlQuery, String keyspace) {
super(false, ProtocolConstants.Opcode.PREPARE);
this.cqlQuery = cqlQuery;
this.keyspace = keyspace;
}
public Prepare(String cqlQuery) {
this(cqlQuery, null);
}
@Override
public String toString() {
return "PREPARE(" + cqlQuery + ", " + keyspace + ')';
}
public static class Codec extends Message.Codec {
public Codec(int protocolVersion) {
super(ProtocolConstants.Opcode.PREPARE, protocolVersion);
}
@Override
public void encode(B dest, Message message, PrimitiveCodec encoder) {
Prepare prepare = (Prepare) message;
encoder.writeLongString(prepare.cqlQuery, dest);
if (protocolVersion >= V5) {
// There is only one PREPARE flag for now, so hard-code for simplicity:
encoder.writeInt((prepare.keyspace == null) ? 0x00 : 0x01, dest);
if (prepare.keyspace != null) {
encoder.writeString(prepare.keyspace, dest);
}
}
}
@Override
public int encodedSize(Message message) {
Prepare prepare = (Prepare) message;
int size = PrimitiveSizes.sizeOfLongString(prepare.cqlQuery);
if (protocolVersion >= V5) {
size += PrimitiveSizes.INT; // flags
if (prepare.keyspace != null) {
size += PrimitiveSizes.sizeOfString(prepare.keyspace);
}
}
return size;
}
@Override
public Message decode(B source, PrimitiveCodec decoder) {
String cqlQuery = decoder.readLongString(source);
String keyspace = null;
if (protocolVersion >= V5) {
int flags = decoder.readInt(source);
if ((flags & 0x01) == 0x01) {
keyspace = decoder.readString(source);
}
}
return new Prepare(cqlQuery, keyspace);
}
}
}