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52 lines
1.4 KiB
52 lines
1.4 KiB
import {Collection, Iterable} from '../../../util'
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import {Connection} from '../../connection/Connection'
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import {AbstractBuilder} from '../AbstractBuilder'
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/**
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* Base Iterable class that generates the results of a Builder query.
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*/
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export abstract class AbstractResultIterable<T> extends Iterable<T> {
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protected constructor(
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/** The builder whose results should be iterated */
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public readonly builder: AbstractBuilder<T>,
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/** The connection on which to execute the builder. */
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public readonly connection: Connection,
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) {
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super()
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}
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/**
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* Get the SQL string for the SELECT query for this iterable.
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*/
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public abstract get selectSQL(): string
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/**
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* Get the result at index i.
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* @param i
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*/
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public abstract at(i: number): Promise<T | undefined>
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/**
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* Get the results starting at index `start` and ending at index `end`.
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* @param start
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* @param end
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*/
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public abstract range(start: number, end: number): Promise<Collection<T>>
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/**
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* Count the number of results of the query.
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*/
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public abstract count(): Promise<number>
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/**
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* Return all items resulting from this query.
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*/
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public abstract all(): Promise<Collection<T>>
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/**
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* Create a new iterable based on this query.
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*/
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public abstract clone(): AbstractResultIterable<T>
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}
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