org.scanamo.query.AttributeName.scala Maven / Gradle / Ivy
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* Copyright 2019 Scanamo
*
* 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 org.scanamo.query
import org.scanamo.DynamoFormat
case class AttributeName(components: List[String], index: Option[Int]) {
import AttributeName.PartiallyAppliedBetween
def placeholder(prefix: String): String =
index.foldLeft(
components.map(s => s"$prefix$s").mkString(".#")
)((p, i) => s"$p[$i]")
def attributeNames(prefix: String): Map[String, String] =
Map(components.map(s => s"$prefix$s" -> s): _*)
def \(component: String) = copy(components = components :+ component)
def apply(index: Int): AttributeName = copy(index = Some(index))
def ===[V: DynamoFormat](v: V): KeyEquals[V] = KeyEquals(this, v)
def <[V: DynamoFormat](v: V): KeyIs[V] = KeyIs(this, LT, v)
def >[V: DynamoFormat](v: V): KeyIs[V] = KeyIs(this, GT, v)
def <=[V: DynamoFormat](v: V): KeyIs[V] = KeyIs(this, LTE, v)
def >=[V: DynamoFormat](v: V): KeyIs[V] = KeyIs(this, GTE, v)
def beginsWith[V: DynamoFormat](v: V): BeginsWith[V] = BeginsWith(this, v)
def between[V: DynamoFormat](lo: V): PartiallyAppliedBetween[V] =
new PartiallyAppliedBetween(this, lo)
def contains(substr: String): Contains = Contains(this, substr)
def in[V: DynamoFormat](vs: Set[V]): KeyList[V] = KeyList(this, vs)
}
object AttributeName {
def of(s: String): AttributeName = AttributeName(List(s), None)
final private[scanamo] class PartiallyAppliedBetween[V: DynamoFormat](attr: AttributeName, lo: V) {
def and(hi: V): Between[V] = Between(attr, lo, hi)
}
}