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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

  • Creates a new instance of the projection parameters and assigns its value.

    Parameters

    • Default value values: any[] = null

    Returns ProjectionParams

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 __@iterator

  • __@iterator(): IterableIterator<string>
  • Iterator

    Returns IterableIterator<string>

Static __@unscopables

  • __@unscopables(): object
  • Returns an object whose properties have the value 'true' when they will be absent when used in a 'with' statement.

    Returns object

    • copyWithin: boolean
    • entries: boolean
    • fill: boolean
    • find: boolean
    • findIndex: boolean
    • keys: boolean
    • values: boolean

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 copyWithin

  • copyWithin(target: number, start: number, end?: number): this
  • Returns the this object after copying a section of the array identified by start and end to the same array starting at position target

    Parameters

    • target: number

      If target is negative, it is treated as length+target where length is the length of the array.

    • start: number

      If start is negative, it is treated as length+start. If end is negative, it is treated as length+end.

    • Optional end: number

      If not specified, length of the this object is used as its default value.

    Returns this

Static entries

  • entries(): IterableIterator<[number, string]>
  • Returns an iterable of key, value pairs for every entry in the array

    Returns IterableIterator<[number, 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 fill

  • fill(value: string, start?: number, end?: number): this
  • Returns the this object after filling the section identified by start and end with value

    Parameters

    • value: string

      value to fill array section with

    • Optional start: number

      index to start filling the array at. If start is negative, it is treated as length+start where length is the length of the array.

    • Optional end: number

      index to stop filling the array at. If end is negative, it is treated as length+end.

    Returns this

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 find

  • find<S>(predicate: function, thisArg?: any): S | undefined
  • find(predicate: function, thisArg?: any): string | undefined
  • Returns the value of the first element in the array where predicate is true, and undefined otherwise.

    Type parameters

    • S: string

    Parameters

    • predicate: function

      find calls predicate once for each element of the array, in ascending order, until it finds one where predicate returns true. If such an element is found, find immediately returns that element value. Otherwise, find returns undefined.

        • (this: void, value: string, index: number, obj: string[]): boolean
        • Parameters

          • this: void
          • value: string
          • index: number
          • obj: string[]

          Returns boolean

    • Optional thisArg: any

      If provided, it will be used as the this value for each invocation of predicate. If it is not provided, undefined is used instead.

    Returns S | undefined

  • Parameters

    • predicate: function
        • (value: string, index: number, obj: string[]): boolean
        • Parameters

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

          Returns boolean

    • Optional thisArg: any

    Returns string | undefined

Static findIndex

  • findIndex(predicate: function, thisArg?: any): number
  • Returns the index of the first element in the array where predicate is true, and -1 otherwise.

    Parameters

    • predicate: function

      find calls predicate once for each element of the array, in ascending order, until it finds one where predicate returns true. If such an element is found, findIndex immediately returns that element index. Otherwise, findIndex returns -1.

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

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

          Returns boolean

    • Optional thisArg: any

      If provided, it will be used as the this value for each invocation of predicate. If it is not provided, undefined is used instead.

    Returns number

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

  • Converts specified value into ProjectionParams.

    see

    AnyValueArray.fromValue

    Parameters

    • value: any

      value to be converted

    Returns ProjectionParams

    a newly created ProjectionParams.

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 keys

  • keys(): IterableIterator<number>
  • Returns an iterable of keys in the array

    Returns IterableIterator<number>

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

Static values

  • values(): IterableIterator<string>
  • Returns an iterable of values in the array

    Returns IterableIterator<string>

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