com.stratio.crossdata.driver.querybuilder.ProjectedSelect.scala Maven / Gradle / Ivy

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/**
 * Copyright (C) 2015 Stratio (http://stratio.com)
 *
 * 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 com.stratio.crossdata.driver.querybuilder

import com.stratio.crossdata.driver.querybuilder.dslentities.XDQLStatement

class ProjectedSelect(selection: Expression*)(implicit context: String => String = x => x) {

  def from(relation: Relation): SimpleRunnableQuery = new SimpleRunnableQuery(selection, relation, context)

  def from(relations: Relation*): SimpleRunnableQuery = {
    val rel = relations.reduce((a: Relation, b: Relation) => a.join(b))
    new SimpleRunnableQuery(selection, rel, context)
  }

  def from(strRelation: String): SimpleRunnableQuery =
    new SimpleRunnableQuery(selection, XDQLStatement(strRelation), context)
}