Scala Objects类代码示例

//设置package包名称以及导入依赖的类
package com.github.shadowsocks.acl

import java.net.InetAddress
import java.util.Objects

import com.github.shadowsocks.utils.Utils


@throws[IllegalArgumentException]
class Subnet(val address: InetAddress, val prefixSize: Int) extends Comparable[Subnet] {
  private def addressLength = address.getAddress.length << 3
  if (prefixSize < 0 || prefixSize > addressLength) throw new IllegalArgumentException

  override def toString: String =
    if (prefixSize == addressLength) address.getHostAddress else address.getHostAddress + '/' + prefixSize

  override def compareTo(that: Subnet): Int = {
    val addrThis = address.getAddress
    val addrThat = that.address.getAddress
    var result = addrThis lengthCompare addrThat.length // IPv4 address goes first
    if (result != 0) return result
    for ((x, y) <- addrThis zip addrThat) {
      result = (x & 0xFF) compare (y & 0xFF)  // undo sign extension of signed byte
      if (result != 0) return result
    }
    prefixSize compare that.prefixSize
  }

  override def equals(other: Any): Boolean = other match {
    case that: Subnet => address == that.address && prefixSize == that.prefixSize
    case _ => false
  }
  override def hashCode: Int = Objects.hash(address, prefixSize: Integer)
}

object Subnet {
  @throws[IllegalArgumentException]
  def fromString(value: String): Subnet = {
    val parts = value.split("/")
    val addr = Utils.parseNumericAddress(parts(0))
    parts.length match {
      case 1 => new Subnet(addr, addr.getAddress.length << 3)
      case 2 => new Subnet(addr, parts(1).toInt)
      case _ => throw new IllegalArgumentException()
    }
  }
} 

//设置package包名称以及导入依赖的类
package com.nthportal.euler.util.calendar

import java.util.Objects

case class Date(month: Month, day: Int, dayOfWeek: DayOfWeek) {
  Objects.requireNonNull(month)
  Objects.requireNonNull(dayOfWeek)
  if (day <= 0 || day > month.days) throw new IllegalArgumentException("Invalid day '" + day + "' for month: " + month)

  def year: Int = month.year

  def nextDay: Date = {
    if (day == month.days) Date(month.nextMonth, 1, dayOfWeek.nextDay)
    else Date(month, day + 1, dayOfWeek.nextDay)
  }

  override def toString: String = month + " " + day + ", " + dayOfWeek
} 

//设置package包名称以及导入依赖的类
package org.pdfextractor.algorithm.candidate

import java.util.{Locale, Objects}

import org.pdfextractor.db.domain.dictionary.PaymentFieldType

import scala.beans.BeanProperty


case class Candidate(@BeanProperty // for dependent RESTful API in Java
                     value: Any,
                     x: Integer,
                     y: Integer,
                     bold: Boolean,
                     height: Integer,
                     pageNo: Integer,
                     locale: Locale,
                     paymentFieldType: PaymentFieldType,
                     properties: Map[CandidateMetadata, Any])
  extends Comparable[Candidate] {

  Objects.requireNonNull(value)

  override def compareTo(other: Candidate): Int = compare(this, other)

  override def equals(other: Any): Boolean = {
    other match {
      case that: Candidate => this.value == that.value
      case _ => false
    }
  }

  override def hashCode(): Int = value.hashCode()

} 

//设置package包名称以及导入依赖的类
package com.avsystem.scex.util

import java.util.Objects
import java.{lang => jl, util => ju}

import scala.collection.mutable.ListBuffer
import scala.reflect.api.Universe


class TypeWrapper(universeWithTpe: (u.type, u.Type) forSome {val u: Universe}) {
  private val u = universeWithTpe._1
  private val tpe = universeWithTpe._2.asInstanceOf[u.Type]

  import u._

  private def getSymbols(tpe: Type): List[Symbol] = {
    val b = new ListBuffer[Symbol]

    def symbolsIn(tpe: Type): Unit = tpe match {
      case SingleType(pre, sym) =>
        b += sym
        symbolsIn(pre)
      case TypeRef(pre, sym, args) =>
        b += sym
        symbolsIn(pre)
        args.foreach(symbolsIn)
      case _ =>
        b += tpe.typeSymbol
    }
    symbolsIn(tpe)
    b.result()
  }

  private val symbols = getSymbols(tpe)

  override def equals(other: Any) = other match {
    case other: TypeWrapper =>
      (u eq other.u) && symbols == other.symbols && tpe =:= other.tpe.asInstanceOf[Type]
    case _ => false
  }

  override val hashCode = Objects.hash(u, symbols)
}

object TypeWrapper {
  def apply(u: Universe)(tpe: u.Type) = new TypeWrapper((u, tpe): (u.type, u.Type))
}