org.bdgenomics.utils.minhash.MinHashBucketKey.scala Maven / Gradle / Ivy

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/**
 * Licensed to Big Data Genomics (BDG) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The BDG licenses this file
 * to you 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 org.bdgenomics.utils.minhash

private[minhash] case class MinHashBucketKey(band: Int, keys: Array[Int]) {

  /**
   * @param other Value to similarity against.
   * @returns True if the value is also a MinHashBucketKey and the band and all
   *          keys match.
   */
  override def equals(other: Any): Boolean = other match {
    case mhbk: MinHashBucketKey => {
      mhbk.band == band && mhbk.keys.sameElements(keys)
    }
    case _ => false
  }

  override def hashCode(): Int = {
    17 * band + keys.reduceLeft((v1, v2) => 31 * v1 + v2)
  }
}