s2core/src/main/scala/org/apache/s2graph/core/storage/serde/vertex/tall/VertexDeserializable.scala

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 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
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 *   http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.s2graph.core.storage.serde.vertex.tall

import org.apache.s2graph.core.schema.ColumnMeta
import org.apache.s2graph.core.storage.CanSKeyValue
import org.apache.s2graph.core.storage.serde.Deserializable
import org.apache.s2graph.core.storage.serde.StorageDeserializable._
import org.apache.s2graph.core.types.{HBaseType, InnerVal, InnerValLike, VertexId}
import org.apache.s2graph.core.{S2Graph, S2GraphLike, S2Vertex, S2VertexLike}

class VertexDeserializable(graph: S2GraphLike,
                           bytesToInt: (Array[Byte], Int) => Int = bytesToInt) extends Deserializable[S2VertexLike] {
  val builder = graph.elementBuilder
  def fromKeyValues[T: CanSKeyValue](_kvs: Seq[T],
                                          cacheElementOpt: Option[S2VertexLike]): Option[S2VertexLike] = {
    try {
      val kvs = _kvs.map { kv => implicitly[CanSKeyValue[T]].toSKeyValue(kv) }
      val kv = kvs.head
      val version = HBaseType.DEFAULT_VERSION
      val (vertexId, _) = VertexId.fromBytes(kv.row, 0, kv.row.length - 1, version)
      val serviceColumn = vertexId.column
      val schemaVer = serviceColumn.schemaVersion

      val propsMap = new collection.mutable.HashMap[ColumnMeta, InnerValLike]
      kvs.foreach { kv =>
        val columnMetaSeq = kv.row.last
        val columnMeta = serviceColumn.metasMap(columnMetaSeq)
        val (innerVal, _) = InnerVal.fromBytes(kv.value, 0, kv.value.length, schemaVer)

        propsMap += (columnMeta -> innerVal)
      }

      val vertex = builder.newVertex(vertexId, kv.timestamp, S2Vertex.EmptyProps, belongLabelIds = Nil)
      S2Vertex.fillPropsWithTs(vertex, propsMap.toMap)

      Option(vertex)
    } catch {
      case e: Exception => None
    }
  }
}