dsl.criteria.ValueBuilder.scala Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of reactivemongo-extensions-bson_2.11 Show documentation
reactivemongo-extensions-bson
The newest version!
/*
 * Copyright 2013 Steve Vickers
 *
 * 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 reactivemongo.extensions.dsl.criteria

import scala.language.implicitConversions

import reactivemongo.bson._

/** The '''ValueBuilder'' type is a model of the ''type class'' pattern used to
 *  produce a ''T''-specific [[reactivemongo.bson.BSONValue]] instance.
 *
 *  @author svickers
 *
 */
trait ValueBuilder[T] {
	def bson(v: T): BSONValue;
}

/** The '''ValueBuilder''' companion object defines common
 *  [[reactivemongo.extensions.dsl.criteria.ValueBuilder]] ''type classes''
 *  available for any project.  Types not known to the library can define
 *  [[reactivemongo.extensions.dsl.criteria.ValueBuilder]] instances as needed
 *  to extend the DSL.
 */
object ValueBuilder {
	implicit def bsonValueIdentityValue[T <: BSONValue]: ValueBuilder[T] =
		new ValueBuilder[T] {
			override def bson(v: T): T = v;
		}

	implicit object DateTimeValue
			extends ValueBuilder[java.util.Date] {
		override def bson(v: java.util.Date): BSONValue =
			BSONDateTime(v.getTime);
	}

	implicit object BooleanValue
			extends ValueBuilder[Boolean] {
		override def bson(v: Boolean): BSONValue =
			BSONBoolean(v);
	}

	implicit object DoubleValue
			extends ValueBuilder[Double] {
		override def bson(v: Double): BSONValue =
			BSONDouble(v);
	}

	implicit object IntValue
			extends ValueBuilder[Int] {
		override def bson(v: Int): BSONValue =
			BSONInteger(v);
	}

	implicit object LongValue
			extends ValueBuilder[Long] {
		override def bson(v: Long): BSONValue =
			BSONLong(v);
	}

	implicit object StringValue
			extends ValueBuilder[String] {
		override def bson(v: String): BSONValue =
			BSONString(v);
	}

	implicit object SymbolValue
			extends ValueBuilder[Symbol] {
		override def bson(v: Symbol): BSONValue =
			BSONSymbol(v.name);
	}

	implicit object TimestampValue
			extends ValueBuilder[java.sql.Timestamp] {
		override def bson(v: java.sql.Timestamp): BSONValue =
			BSONTimestamp(v.getTime);
	}
}