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/*
 * Copyright 2024 Hazelcast Inc.
 *
 * Licensed under the Hazelcast Community License (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://hazelcast.com/hazelcast-community-license
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.hazelcast.sql.impl;

import com.hazelcast.internal.serialization.Data;
import com.hazelcast.internal.serialization.SerializationService;
import com.hazelcast.internal.serialization.impl.HeapData;
import com.hazelcast.jet.sql.impl.JetSqlSerializerHook;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.serialization.IdentifiedDataSerializable;
import com.hazelcast.sql.impl.extract.GenericQueryTarget;
import com.hazelcast.sql.impl.type.QueryDataType;
import com.hazelcast.sql.impl.type.QueryDataTypeUtils;

import java.io.IOException;

/**
 * Target that is deserialized lazily.
 * 

* Initially the instance is linked to {@link GenericQueryTarget} which helps us avoid the possible double-deserialization. * The object is unlinked */ public class LazyTarget implements IdentifiedDataSerializable { private Data serialized; private Object deserialized; public LazyTarget() { // No-op. } public LazyTarget(Data serialized, Object deserialized) { assert serialized != null || deserialized != null; this.serialized = serialized; this.deserialized = deserialized; } public Object deserialize(SerializationService serializationService) { try { if (deserialized == null) { deserialized = serializationService.toObject(serialized); } QueryDataType type = QueryDataTypeUtils.resolveTypeForClass(deserialized.getClass()); return type.normalize(deserialized); } catch (Exception e) { throw QueryException.dataException("Failed to deserialize map entry key or value: " + e.getMessage(), e); } } public Data getSerialized() { return serialized; } public void setSerialized(Data serialized) { this.serialized = serialized; } public Object getDeserialized() { return deserialized; } public void setDeserialized(Object deserialized) { this.deserialized = deserialized; } @Override public int getFactoryId() { return JetSqlSerializerHook.F_ID; } @Override public int getClassId() { return JetSqlSerializerHook.LAZY_TARGET; } @Override public void writeData(ObjectDataOutput out) throws IOException { if (serialized != null) { out.writeBoolean(true); out.writeByteArray(serialized.toByteArray()); } else { out.writeBoolean(false); out.writeObject(deserialized); } } @Override public void readData(ObjectDataInput in) throws IOException { if (in.readBoolean()) { serialized = new HeapData(in.readByteArray()); } else { deserialized = in.readObject(); } } }





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