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/*
 * Copyright (c) 2017 Uber Technologies, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package com.uber.engsec.dp.dataflow.node

import com.uber.engsec.dp.sql.AbstractAnalysis
import com.uber.engsec.dp.sql.dataflow_graph.{DataflowGraphFunctions, Node}

/** Interface for simple DFG analyses that don't require dataflow tracking (e.g., visitor analyses).
  *
  * @tparam T The result type
  */
trait DFGVisitorAnalysis[T <: Any] extends AbstractAnalysis[Node,T] with DataflowGraphFunctions {
  // Handle book keeping for abstract analysis
  final override def process(root: Node): Unit = resultMap += (root -> run(root))

  /** The only method that needs to be implemented by subclasses. Runs the analysis on the given tree and returns
    * the result.
    */
  def run(root: Node): T
}