map_aggregate_with_predicate_codec.go

/*
 * Copyright (c) 2008-2021, Hazelcast, Inc. All Rights Reserved.
 *
 * 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 codec

import (
	"github.com/hazelcast/hazelcast-go-client/internal/proto"
	"github.com/hazelcast/hazelcast-go-client/internal/serialization"
)

const (
	// hex: 0x013A00
	MapAggregateWithPredicateCodecRequestMessageType = int32(80384)
	// hex: 0x013A01
	MapAggregateWithPredicateCodecResponseMessageType = int32(80385)

	MapAggregateWithPredicateCodecRequestInitialFrameSize = proto.PartitionIDOffset + proto.IntSizeInBytes
)

// Applies the aggregation logic on map entries filtered with the Predicate and returns the result

func EncodeMapAggregateWithPredicateRequest(name string, aggregator *serialization.Data, predicate *serialization.Data) *proto.ClientMessage {
	clientMessage := proto.NewClientMessageForEncode()
	clientMessage.SetRetryable(true)

	initialFrame := proto.NewFrameWith(make([]byte, MapAggregateWithPredicateCodecRequestInitialFrameSize), proto.UnfragmentedMessage)
	clientMessage.AddFrame(initialFrame)
	clientMessage.SetMessageType(MapAggregateWithPredicateCodecRequestMessageType)
	clientMessage.SetPartitionId(-1)

	EncodeString(clientMessage, name)
	EncodeData(clientMessage, aggregator)
	EncodeData(clientMessage, predicate)

	return clientMessage
}

func DecodeMapAggregateWithPredicateResponse(clientMessage *proto.ClientMessage) *serialization.Data {
	frameIterator := clientMessage.FrameIterator()
	// empty initial frame
	frameIterator.Next()

	return CodecUtil.DecodeNullableForData(frameIterator)
}