com.johnsnowlabs.nlp.embeddings.WordEmbeddingsWriter.scala Maven / Gradle / Ivy

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/*
 * Copyright 2017-2022 John Snow Labs
 *
 * 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.johnsnowlabs.nlp.embeddings

import com.johnsnowlabs.storage.{RocksDBConnection, StorageBatchWriter}

import java.nio.{ByteBuffer, ByteOrder}

class WordEmbeddingsWriter(
    override val connection: RocksDBConnection,
    caseSensitiveIndex: Boolean,
    dimension: Int,
    maxCacheSize: Int,
    writeBuffer: Int)
    extends StorageBatchWriter[Array[Float]]
    with ReadsFromBytes {

  override protected def writeBufferSize: Int = writeBuffer

  override def toBytes(content: Array[Float]): Array[Byte] = {
    val buffer = ByteBuffer.allocate(content.length * 4)
    buffer.order(ByteOrder.LITTLE_ENDIAN)
    for (value <- content) {
      buffer.putFloat(value)
    }
    buffer.array()
  }

}