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• 2.8.1-2.10
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• IHashedIndex.scala

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com.github.tsingjyujing.geo.basic.operations.IHashedIndex.scala Maven / Gradle / Ivy

package com.github.tsingjyujing.geo.basic.operations

/**
  * Which class can get an indexed hash
  * the index code should be unique to avoid duplication in Set or other data structures
  *
  * @author [email protected]
  * @tparam T should have a great randomly hashCode, recommend use Long, Int, avoid using String or Double
  */
trait IHashedIndex[T] {

    /**
      * isEqual function
      *
      * @param x
      * @return
      */
    def isEqual(x: IHashedIndex[T]): Boolean = x.indexCode.equals(indexCode)

    /**
      * Get a unique indexCode as type T
      *
      * @return
      */
    def indexCode: T

    /**
      * Avoid duplication in Set or key of the Map
      *
      * @param o object to compare
      * @return
      */
    override def equals(o: scala.Any): Boolean = o match {
        case oFetched: IHashedIndex[T] => isEqual(oFetched)
        case _ => false
    }

    /**
      * Create a hashCode to accelerate operations in HashSet or HashMap ect.
      *
      * @return
      */
    override def hashCode(): Int = indexCode.hashCode()
}