com.beeproduced.bee.persistent.selection.EmptySelection.kt Maven / Gradle / Ivy

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package com.beeproduced.bee.persistent.selection

/**
 * @author Kacper Urbaniec
 * @version 2023-01-30
 */
class EmptySelection : DataSelection {
  override val skipOvers = SkipOverCollection(emptyList())

  override fun contains(fieldGlobPattern: String): Boolean = false

  override fun subSelect(fieldGlobPattern: String): DataSelection? = null

  override fun merge(vararg selections: SimpleSelection): DataSelection {
    return merge(selections.asList())
  }

  override fun merge(selections: Collection): DataSelection {
    if (selections.isEmpty()) return this
    val selection = SimpleSelection(setOf())
    return selection.merge(selections)
  }

  override fun typeSelect(typeName: String): DataSelection? = null
}