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XPath.scala
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XPath.scala
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/*
* Copyright 2023 Lucas Satabin
*
* 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 fs2
package data
package xml
package xpath
import cats.Eq
import cats.syntax.all._
import cats.data.NonEmptyList
case class XPath(locations: NonEmptyList[List[Location]])
case class Location(axis: Axis, node: Node, predicate: Option[Predicate])
case class Node(prefix: Option[String], local: Option[String]) {
def matches(name: QName): Boolean =
this match {
case Node(None, None) => true
case Node(None, Some(local)) => name.local === local
case Node(pfx, None) => name.prefix === pfx
case Node(pfx, Some(local)) => name.prefix === pfx && name.local === local
}
}
object Node {
implicit val eq: Eq[Node] = Eq.fromUniversalEquals
}
sealed trait Axis
object Axis {
case object Child extends Axis
case object Descendant extends Axis
}
sealed trait Predicate
object Predicate {
case object True extends Predicate
case object False extends Predicate
case class Exists(attr: QName) extends Predicate
case class Eq(attr: QName, value: String) extends Predicate
case class Neq(attr: QName, value: String) extends Predicate
case class And(left: Predicate, right: Predicate) extends Predicate
case class Or(left: Predicate, right: Predicate) extends Predicate
case class Not(inner: Predicate) extends Predicate
}