Lift Framework example source code file (Serializers.scala)

This example Lift Framework source code file (Serializers.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Lift Framework tags/keywords

can't, date, date, formats, formats, jobject, jstring, jvalue, jvalue, mappingexception, nil, partialfunction, partialfunction, regex, typeinfo, util

The Lift Framework Serializers.scala source code

/*
* Copyright 2010-2011 WorldWide Conferencing, LLC
*
* 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 net.liftweb 
package mongodb 

import json.{Formats, MappingException, Serializer, TypeInfo}
import json.JsonAST._


import java.util.{Date, UUID}
import java.util.regex.{Pattern, PatternSyntaxException}

import org.bson.types.ObjectId

/*
* Provides a way to serialize/de-serialize ObjectIds.
*
* Queries for a ObjectId (oid) using the lift-json DSL look like:
* ("_id" -> ("$oid" -> oid.toString))
*/
class ObjectIdSerializer extends Serializer[ObjectId] {
  private val ObjectIdClass = classOf[ObjectId]

  def deserialize(implicit format: Formats): PartialFunction[(TypeInfo, JValue), ObjectId] = {
    case (TypeInfo(ObjectIdClass, _), json) => json match {
      case JObject(JField("$oid", JString(s)) :: Nil) if (ObjectId.isValid(s)) =>
        new ObjectId(s)
      case x => throw new MappingException("Can't convert " + x + " to ObjectId")
    }
  }

  def serialize(implicit formats: Formats): PartialFunction[Any, JValue] = {
    case x: ObjectId => Meta.objectIdAsJValue(x)
  }
}

/*
* Provides a way to serialize/de-serialize Patterns.
*
* Queries for a Pattern (pattern) using the lift-json DSL look like:
* ("pattern" -> (("$regex" -> pattern.pattern) ~ ("$flags" -> pattern.flags)))
* ("pattern" -> (("$regex" -> "^Mo") ~ ("$flags" -> Pattern.CASE_INSENSITIVE)))
*/
class PatternSerializer extends Serializer[Pattern] {
  private val PatternClass = classOf[Pattern]

  def deserialize(implicit format: Formats): PartialFunction[(TypeInfo, JValue), Pattern] = {
    case (TypeInfo(PatternClass, _), json) => json match {
      case JObject(JField("$regex", JString(s)) :: JField("$flags", JInt(f)) :: Nil) =>
        Pattern.compile(s, f.intValue)
      case x => throw new MappingException("Can't convert " + x + " to Pattern")
    }
  }

  def serialize(implicit formats: Formats): PartialFunction[Any, JValue] = {
    case x: Pattern => Meta.patternAsJValue(x)
  }
}

/*
* Provides a way to serialize/de-serialize Dates.
*
* Queries for a Date (dt) using the lift-json DSL look like:
* ("dt" -> ("$dt" -> formats.dateFormat.format(dt)))
*/
class DateSerializer extends Serializer[Date] {
  private val DateClass = classOf[Date]

  def deserialize(implicit format: Formats): PartialFunction[(TypeInfo, JValue), Date] = {
    case (TypeInfo(DateClass, _), json) => json match {
      case JObject(JField("$dt", JString(s)) :: Nil) =>
        format.dateFormat.parse(s).getOrElse(throw new MappingException("Can't parse "+ s + " to Date"))
      case x => throw new MappingException("Can't convert " + x + " to Date")
    }
  }

  def serialize(implicit format: Formats): PartialFunction[Any, JValue] = {
    case x: Date => Meta.dateAsJValue(x, format)
  }
}

/*
* Provides a way to serialize/de-serialize UUIDs.
*
* Queries for a UUID (u) using the lift-json DSL look like:
* ("uuid" -> ("$uuid" -> u.toString))
*/
class UUIDSerializer extends Serializer[UUID] {
  private val UUIDClass = classOf[UUID]

  def deserialize(implicit format: Formats): PartialFunction[(TypeInfo, JValue), UUID] = {
    case (TypeInfo(UUIDClass, _), json) => json match {
      case JObject(JField("$uuid", JString(s)) :: Nil) => UUID.fromString(s)
      case x => throw new MappingException("Can't convert " + x + " to Date")
    }
  }

  def serialize(implicit format: Formats): PartialFunction[Any, JValue] = {
    case x: UUID => Meta.uuidAsJValue(x)
  }
}