select.SelectCollector.scala Maven / Gradle / Ivy
/*
* Copyright 2021 Kári Magnússon
*
* 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 kuzminki.select
import kuzminki.api.KuzminkiError
import kuzminki.render.{RenderedQuery, Prefix}
import kuzminki.section._
import kuzminki.shape._
case class SelectCollector[R](
prefix: Prefix,
rowShape: RowShape[R],
sections: Vector[Section]
) {
def add(section: Section) = this.copy(sections = sections :+ section)
def extend(added: Vector[Section]) = this.copy(sections = sections ++ added)
val notBlank: Section => Boolean = {
case WhereBlankSec => false
case HavingBlankSec => false
case _ => true
}
private def replaceBlank[P](partShape: PartShape[P]) = sections.map {
case WhereBlankSec =>
WhereSec(partShape.parts)
case WhereSec(conds) =>
WhereSec(conds ++ partShape.parts)
case section: Section =>
section
}
def render = sections.filter(notBlank).map(_.render(prefix)).mkString(" ")
def args = sections.map(_.args).flatten.toVector
def renderCache[P](partShape: PartShape[P]) = {
val modifiedSections = replaceBlank(partShape)
new StoredSelect(
modifiedSections.filter(notBlank).map(_.render(prefix)).mkString(" "),
modifiedSections.map(_.args).flatten,
partShape.conv,
rowShape.conv
)
}
// subquery
def renderSubquery(parPrefix: Prefix) = {
val subPrefix = prefix.forSubquery(parPrefix)
sections.filter(notBlank).map(_.render(subPrefix)).mkString(" ")
}
def asSubqueryInsertFc[P](partShape: PartShape[P]) = {
SubqueryInsertFc(prefix, replaceBlank(partShape), partShape.conv, rowShape)
}
def asSubqueryInFc[P](partShape: PartShapeSingle[P]) = {
SubqueryInFc(prefix, replaceBlank(partShape), partShape.cond.conv, rowShape)
}
}