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Class ProjectionParams

Defines projection parameters with list if fields to include into query results.

The parameters support two formats: dot format and nested format.

The dot format is the standard way to define included fields and subfields using dot object notation: "field1,field2.field21,field2.field22.field221".

As alternative the nested format offers a more compact representation: "field1,field2(field21,field22(field221))".

Example

let filter = FilterParams.fromTuples("type", "Type1");
let paging = new PagingParams(0, 100);
let projection = ProjectionParams.fromString("field1,field2(field21,field22)")

myDataClient.getDataByFilter(filter, paging, projection, (err, page) => {...});

Hierarchy

  • Array<string>
    • ProjectionParams

Indexable

[n: number]: string

Defines projection parameters with list if fields to include into query results.

The parameters support two formats: dot format and nested format.

The dot format is the standard way to define included fields and subfields using dot object notation: "field1,field2.field21,field2.field22.field221".

As alternative the nested format offers a more compact representation: "field1,field2(field21,field22(field221))".

Example

let filter = FilterParams.fromTuples("type", "Type1");
let paging = new PagingParams(0, 100);
let projection = ProjectionParams.fromString("field1,field2(field21,field22)")

myDataClient.getDataByFilter(filter, paging, projection, (err, page) => {...});

Index

Constructors

constructor

Properties

Static Array

Array: ArrayConstructor

Static length

length: number

Gets or sets the length of the array. This is a number one higher than the highest element defined in an array.

Methods

toString

  • toString(): string
  • Gets a string representation of the object. The result is a comma-separated list of projection fields "field1,field2.field21,field2.field22.field221"

    Returns string

    a string representation of the object.

Static concat

  • concat(...items: ConcatArray<string>[]): string[]
  • concat(...items: (T | ConcatArray<T>)[]): string[]
  • Combines two or more arrays.

    Parameters

    • Rest ...items: ConcatArray<string>[]

      Additional items to add to the end of array1.

    Returns string[]

  • Combines two or more arrays.

    Parameters

    • Rest ...items: (T | ConcatArray<T>)[]

      Additional items to add to the end of array1.

    Returns string[]

Static every

  • every(callbackfn: function, thisArg?: any): boolean
  • Determines whether all the members of an array satisfy the specified test.

    Parameters

    • callbackfn: function

      A function that accepts up to three arguments. The every method calls the callbackfn function for each element in array1 until the callbackfn returns false, or until the end of the array.

        • (value: string, index: number, array: string[]): boolean
        • Parameters

          • value: string
          • index: number
          • array: string[]

          Returns boolean

    • Optional thisArg: any

      An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.

    Returns boolean

Static filter

  • filter<S>(callbackfn: function, thisArg?: any): S[]
  • filter(callbackfn: function, thisArg?: any): string[]
  • Returns the elements of an array that meet the condition specified in a callback function.

    Type parameters

    • S: string

    Parameters

    • callbackfn: function

      A function that accepts up to three arguments. The filter method calls the callbackfn function one time for each element in the array.

        • (value: string, index: number, array: string[]): boolean
        • Parameters

          • value: string
          • index: number
          • array: string[]

          Returns boolean

    • Optional thisArg: any

      An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.

    Returns S[]

  • Returns the elements of an array that meet the condition specified in a callback function.

    Parameters

    • callbackfn: function

      A function that accepts up to three arguments. The filter method calls the callbackfn function one time for each element in the array.

        • (value: string, index: number, array: string[]): any
        • Parameters

          • value: string
          • index: number
          • array: string[]

          Returns any

    • Optional thisArg: any

      An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.

    Returns string[]

Static forEach

  • forEach(callbackfn: function, thisArg?: any): void
  • Performs the specified action for each element in an array.

    Parameters

    • callbackfn: function

      A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the array.

        • (value: string, index: number, array: string[]): void
        • Parameters

          • value: string
          • index: number
          • array: string[]

          Returns void

    • Optional thisArg: any

      An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.

    Returns void

Static fromString

  • Parses comma-separated list of projection fields.

    Parameters

    • Rest ...values: string[]

      one or more comma-separated lists of projection fields

    Returns ProjectionParams

    a newly created ProjectionParams.

Static fromValue

Static indexOf

  • indexOf(searchElement: string, fromIndex?: number): number
  • Returns the index of the first occurrence of a value in an array.

    Parameters

    • searchElement: string

      The value to locate in the array.

    • Optional fromIndex: number

      The array index at which to begin the search. If fromIndex is omitted, the search starts at index 0.

    Returns number

Static join

  • join(separator?: string): string
  • Adds all the elements of an array separated by the specified separator string.

    Parameters

    • Optional separator: string

      A string used to separate one element of an array from the next in the resulting String. If omitted, the array elements are separated with a comma.

    Returns string

Static lastIndexOf

  • lastIndexOf(searchElement: string, fromIndex?: number): number
  • Returns the index of the last occurrence of a specified value in an array.

    Parameters

    • searchElement: string

      The value to locate in the array.

    • Optional fromIndex: number

      The array index at which to begin the search. If fromIndex is omitted, the search starts at the last index in the array.

    Returns number

Static map

  • map<U>(callbackfn: function, thisArg?: any): U[]
  • Calls a defined callback function on each element of an array, and returns an array that contains the results.

    Type parameters

    • U

    Parameters

    • callbackfn: function

      A function that accepts up to three arguments. The map method calls the callbackfn function one time for each element in the array.

        • (value: string, index: number, array: string[]): U
        • Parameters

          • value: string
          • index: number
          • array: string[]

          Returns U

    • Optional thisArg: any

      An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.

    Returns U[]

Static pop

  • pop(): string | undefined
  • Removes the last element from an array and returns it.

    Returns string | undefined

Static push

  • push(...items: string[]): number
  • Appends new elements to an array, and returns the new length of the array.

    Parameters

    • Rest ...items: string[]

      New elements of the Array.

    Returns number

Static reduce

  • reduce(callbackfn: function): string
  • reduce(callbackfn: function, initialValue: string): string
  • reduce<U>(callbackfn: function, initialValue: U): U
  • Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.

    Parameters

    • callbackfn: function

      A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.

        • (previousValue: string, currentValue: string, currentIndex: number, array: string[]): string
        • Parameters

          • previousValue: string
          • currentValue: string
          • currentIndex: number
          • array: string[]

          Returns string

    Returns string

  • Parameters

    • callbackfn: function
        • (previousValue: string, currentValue: string, currentIndex: number, array: string[]): string
        • Parameters

          • previousValue: string
          • currentValue: string
          • currentIndex: number
          • array: string[]

          Returns string

    • initialValue: string

    Returns string

  • Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.

    Type parameters

    • U

    Parameters

    • callbackfn: function

      A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.

        • (previousValue: U, currentValue: string, currentIndex: number, array: string[]): U
        • Parameters

          • previousValue: U
          • currentValue: string
          • currentIndex: number
          • array: string[]

          Returns U

    • initialValue: U

      If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.

    Returns U

Static reduceRight

  • reduceRight(callbackfn: function): string
  • reduceRight(callbackfn: function, initialValue: string): string
  • reduceRight<U>(callbackfn: function, initialValue: U): U
  • Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.

    Parameters

    • callbackfn: function

      A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.

        • (previousValue: string, currentValue: string, currentIndex: number, array: string[]): string
        • Parameters

          • previousValue: string
          • currentValue: string
          • currentIndex: number
          • array: string[]

          Returns string

    Returns string

  • Parameters

    • callbackfn: function
        • (previousValue: string, currentValue: string, currentIndex: number, array: string[]): string
        • Parameters

          • previousValue: string
          • currentValue: string
          • currentIndex: number
          • array: string[]

          Returns string

    • initialValue: string

    Returns string

  • Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.

    Type parameters

    • U

    Parameters

    • callbackfn: function

      A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.

        • (previousValue: U, currentValue: string, currentIndex: number, array: string[]): U
        • Parameters

          • previousValue: U
          • currentValue: string
          • currentIndex: number
          • array: string[]

          Returns U

    • initialValue: U

      If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.

    Returns U

Static reverse

  • reverse(): string[]
  • Reverses the elements in an Array.

    Returns string[]

Static shift

  • shift(): string | undefined
  • Removes the first element from an array and returns it.

    Returns string | undefined

Static slice

  • slice(start?: number, end?: number): string[]
  • Returns a section of an array.

    Parameters

    • Optional start: number

      The beginning of the specified portion of the array.

    • Optional end: number

      The end of the specified portion of the array.

    Returns string[]

Static some

  • some(callbackfn: function, thisArg?: any): boolean
  • Determines whether the specified callback function returns true for any element of an array.

    Parameters

    • callbackfn: function

      A function that accepts up to three arguments. The some method calls the callbackfn function for each element in array1 until the callbackfn returns true, or until the end of the array.

        • (value: string, index: number, array: string[]): boolean
        • Parameters

          • value: string
          • index: number
          • array: string[]

          Returns boolean

    • Optional thisArg: any

      An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.

    Returns boolean

Static sort

  • sort(compareFn?: function): this
  • Sorts an array.

    Parameters

    • Optional compareFn: function

      The name of the function used to determine the order of the elements. If omitted, the elements are sorted in ascending, ASCII character order.

        • (a: string, b: string): number
        • Parameters

          • a: string
          • b: string

          Returns number

    Returns this

Static splice

  • splice(start: number, deleteCount?: number): string[]
  • splice(start: number, deleteCount: number, ...items: string[]): string[]
  • Removes elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.

    Parameters

    • start: number

      The zero-based location in the array from which to start removing elements.

    • Optional deleteCount: number

      The number of elements to remove.

    Returns string[]

  • Removes elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.

    Parameters

    • start: number

      The zero-based location in the array from which to start removing elements.

    • deleteCount: number

      The number of elements to remove.

    • Rest ...items: string[]

      Elements to insert into the array in place of the deleted elements.

    Returns string[]

Static toLocaleString

  • toLocaleString(): string
  • Returns a string representation of an array. The elements are converted to string using thier toLocalString methods.

    Returns string

Static toString

  • toString(): string
  • Returns a string representation of an array.

    Returns string

Static unshift

  • unshift(...items: string[]): number
  • Inserts new elements at the start of an array.

    Parameters

    • Rest ...items: string[]

      Elements to insert at the start of the Array.

    Returns number

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