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/*
 * Copyright © 2009 HotPads ([email protected])
 *
 * 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 io.datarouter.gcp.spanner.op.entity.read;

import java.util.Collection;

import com.google.cloud.spanner.DatabaseClient;
import com.google.cloud.spanner.Key;
import com.google.cloud.spanner.Key.Builder;

import io.datarouter.gcp.spanner.field.SpannerBaseFieldCodec;
import io.datarouter.gcp.spanner.field.SpannerFieldCodecRegistry;
import io.datarouter.gcp.spanner.op.entity.SpannerEntityOp;
import io.datarouter.gcp.spanner.op.read.SpannerGetOp;
import io.datarouter.gcp.spanner.util.SpannerEntityKeyTool;
import io.datarouter.model.databean.Databean;
import io.datarouter.model.key.entity.EntityKey;
import io.datarouter.model.key.entity.EntityPartitioner;
import io.datarouter.model.key.primary.EntityPrimaryKey;
import io.datarouter.model.key.primary.PrimaryKey;
import io.datarouter.model.serialize.fielder.DatabeanFielder;
import io.datarouter.storage.config.Config;
import io.datarouter.storage.serialize.fieldcache.PhysicalDatabeanFieldInfo;

public class SpannerEntityGetOp<
		EK extends EntityKey,
		PK extends EntityPrimaryKey,
		D extends Databean,
		F extends DatabeanFielder>
extends SpannerGetOp
implements SpannerEntityOp{

	private final EntityPartitioner partitioner;

	public SpannerEntityGetOp(
			DatabaseClient client,
			PhysicalDatabeanFieldInfo fieldInfo,
			Collection keys,
			Config config,
			SpannerFieldCodecRegistry codecRegistry,
			EntityPartitioner partitioner){
		super(client, fieldInfo, keys, config, codecRegistry, SpannerEntityKeyTool.getEntityTableName(fieldInfo));
		this.partitioner = partitioner;
	}

	@Override
	protected > Key primaryKeyConversion(K key){
		Builder mutationKey = getPartiton(key, partitioner);
		for(SpannerBaseFieldCodec codec : codecRegistry.createCodecs(SpannerEntityKeyTool.getPrimaryKeyFields(
				key,
				fieldInfo.isSubEntity()))){
			mutationKey = codec.setKey(mutationKey);
		}
		return mutationKey.build();
	}

}