scala.xml.Utility 代码实例

scala.xml.Utility 代码实例

实例 1

package actors

import akka.actor.Actor
import akka.actor.ActorLogging
import akka.event.LoggingReceive
import play.api.libs.json.JsValue
import play.api.libs.json.Json
import akka.actor.ActorRef
import akka.actor.Props
import scala.xml.Utility

class UserActor(nick: String, userId: Int, board: ActorRef, out: ActorRef) extends Actor with ActorLogging {

  override def preStart() = {
    board ! Subscribe
    import UserActor._
    val js = Json.obj("type" -> "info", "img" -> userId % AvatarCount)
    out ! js
  }

  def receive = LoggingReceive {
    case Message(nickname, id, s) if sender == board =>
      import UserActor._
      if (nickname != nick) {
        val js = Json.obj("type" -> "message", "nickname" -> nickname, "msg" -> s, "img" -> id % AvatarCount)
        out ! js
      }
    case js: JsValue =>
      (js  "msg").validate[String] map {
        Utility.escape
      } foreach {
        board ! Message(nick, userId, _)
      }
    case other =>
      log.error("unhandled: " + other)
  }
}

object UserActor {
  val AvatarCount = 11
  var userCount = 0

  def props(nick: String)(out: ActorRef) = {
    userCount += 1
    Props(new UserActor(nick, userCount - 1, BoardActor(), out))
  }
} 

实例 2

package com.github.rvanheest.spickle.example.xml.person

import scala.xml.{ Elem, Node, Utility }

trait PersonXml {

  // @formatter:off
  private val person1: Elem = <person age="24" xlink:age="24">
    <name>Jonathan Moreno</name>
    <address>
      <street>Atwood</street>
      <number>6689</number>
      <zip-code>1234AB</zip-code>
      <city>Tembladera</city>
    </address>
    <mail>[email protected]</mail>
  </person>

  private val person2: Elem = <person age="48" xlink:age="48">
    <name>Jonathan Moreno</name>
    <address>
      <street>Atwood</street>
      <number addition="a">6689</number>
      <zip-code>1234AB</zip-code>
      <city>Tembladera</city>
    </address>
    <mail>[email protected]</mail>
  </person>

  private val person3: Elem = <person age="68" xlink:age="68">
    <name>Jonathan Moreno</name>
    <address>
      <freepost-number>70</freepost-number>
      <zip-code>1234AB</zip-code>
      <city>Tembladera</city>
    </address>
  </person>
  // @formatter:on

  val xml1: Node = Utility.trim(person1)
  val xml2: Node = Utility.trim(person2)
  val xml3: Node = Utility.trim(person3)
} 

实例 3

package actors

import actors.UserSocket.{ChatMessage, Message}
import actors.UserSocket.Message.messageReads
import akka.actor.{Actor, ActorLogging, ActorRef, Props}
import akka.cluster.pubsub.DistributedPubSub
import akka.cluster.pubsub.DistributedPubSubMediator.{Publish, Subscribe}
import akka.event.LoggingReceive
import play.api.libs.json.{Writes, JsValue, Json}
import play.twirl.api.HtmlFormat

import scala.xml.Utility

object UserSocket {
  def props(user: String)(out: ActorRef) = Props(new UserSocket(user, out))

  case class Message(msg: String)

  object Message {
    implicit val messageReads = Json.reads[Message]
  }

  case class ChatMessage(user: String, text: String)

  object ChatMessage {
    implicit val chatMessageWrites = new Writes[ChatMessage] {
      def writes(chatMessage: ChatMessage): JsValue = {
        Json.obj(
          "type" -> "message",
          "user" -> chatMessage.user,
          "text" -> multiLine(chatMessage.text)
        )
      }
    }

    private def multiLine(text: String) = {
      HtmlFormat.raw(text).body.replace("n", "<br/>")
    }
  }
}

class UserSocket(uid: String, out: ActorRef) extends Actor with ActorLogging {

  val topic = "chat"

  val mediator = DistributedPubSub(context.system).mediator

  mediator ! Subscribe(topic, self)

  def receive = LoggingReceive {
    case js: JsValue =>
      js.validate[Message](messageReads)
        .map(message => Utility.escape(message.msg))
        .foreach { msg => mediator ! Publish(topic, ChatMessage(uid, msg))}

    case c:ChatMessage => out ! Json.toJson(c)
  }
} 

实例 4

package edu.ncrn.cornell.xml
import scala.annotation.tailrec
import scala.xml.{Node, Utility}
import ScalaXmlExtra._
import XpathEnumerator._


class XpathXmlEnumerator(
  protected val nodesIn: List[Node]
) extends XpathEnumerator {

  @tailrec
  final def enumerateXml(
    nodes: List[(Node, String)], pathData: List[(String, String)]
  )(implicit nodeFilters: NodeFilters): List[(String, String)] =
    nodes.filter(x => nodeFilters(x._2, x._1)) match {
      case (node, currentPath) +: rest =>
        val newElementData =
          if(node.child.isEmpty) List((cleanXpath(currentPath), node.text))
          else Nil
        val newAttributeData = node.attributes.asAttrMap.map{
          case (key, value) => (currentPath + "/@" + key, value)
        }.toList
        enumerateXml(
          rest ++ pathifyNodes(node.child.toList, currentPath + "/", nonEmpty),
          newElementData ::: newAttributeData ::: pathData
        )
      case Nil => pathData
    }

  def enumerate(
    nonEmpty: Boolean,
    newNodeFilters: NodeFilters
  ): List[(String, String)] = {
    implicit val nodeFilters = newNodeFilters
    this.nonEmpty = nonEmpty
    enumerateXml(pathifyNodes(
      nodesIn.map(x => Utility.trim(x)), "/", nonEmpty
    ), Nil)
  }



}

object XpathXmlEnumerator {

  //def apply() ...

}