Window (Groovy 4.0.8)

org.apache.groovy.ginq.provider.collection.runtime.Queryable

All Superinterfaces:

Queryable
```
public interface Window<T>
extends Queryable
```
Represents window which stores elements used by window functions
Type Parameters:
T - the type of Window element
Since:
4.0.0

Methods Summary

Methods
Type Params	Return Type	Name and description
	`public BigDecimal`	`cumeDist()` Returns the cumulative distribution of a value in the window
	`public Long`	`denseRank()` Returns the dense rank in the window
`<V>`	`public V`	`firstValue(Function<? super T, ? extends V> extractor)` Returns the first value in the window
`<V>`	`public V`	`lag(Function<? super T, ? extends V> extractor)` Returns the previous value in the window, similar to SQL's `lag()`
`<V>`	`public V`	`lag(Function<? super T, ? extends V> extractor, long lag)` Returns the previous value in the window, similar to SQL's `lag()`
`<V>`	`public V`	`lag(Function<? super T, ? extends V> extractor, long lag, V def)` Returns the previous value by `lag` in the window, similar to SQL's `lag()`
`<V>`	`public V`	`lastValue(Function<? super T, ? extends V> extractor)` Returns the last value in the window
`<V>`	`public V`	`lead(Function<? super T, ? extends V> extractor)` Returns the next value in the window, similar to SQL's `lead()`
`<V>`	`public V`	`lead(Function<? super T, ? extends V> extractor, long lead)` Returns the next value in the window, similar to SQL's `lead()`
`<V>`	`public V`	`lead(Function<? super T, ? extends V> extractor, long lead, V def)` Returns the next value by `lead` in the window, similar to SQL's `lead()`
`<V>`	`public V`	`nthValue(Function<? super T, ? extends V> extractor, long index)` Returns the nth value in the window
	`public long`	`ntile(long bucketCnt)` Distributes rows of an ordered window into a pre-defined number of roughly equal buckets
`<T, U extends Comparable<? super U>>`	`public static Window<T>`	`of(Tuple2<T, Long> currentRecord, Partition<Tuple2<T, Long>> partition, WindowDefinition<T, U> windowDefinition)` Factory method to create Window instance
	`public BigDecimal`	`percentRank()` Returns the percent rank in the window
	`public Long`	`rank()` Returns the rank in the window
	`public long`	`rowNumber()` Returns row number in the window, similar to SQL's `row_number()`

Inherited Methods Summary

Inherited Methods
Methods inherited from class	Name
`interface Queryable`	`agg, avg, count, count, crossJoin, distinct, emptyQueryable, exists, from, from, from, from, fullHashJoin, fullJoin, groupBy, groupBy, innerHashJoin, innerJoin, intersect, leftHashJoin, leftJoin, limit, limit, max, median, min, minus, orderBy, orderBy, over, rightHashJoin, rightJoin, select, size, stdev, stdevp, stream, sum, toList, union, unionAll, var, varp, where`

- Method Detail
  - public BigDecimal cumeDist()
    
    Returns the cumulative distribution of a value in the window
    Returns:
    the cumulative distribution of a value
    Since:
    4.0.0
  - public Long denseRank()
    
    Returns the dense rank in the window
    Returns:
    the dense rank
    Since:
    4.0.0
  - <V> public V firstValue(Function<? super T, ? extends V> extractor)
    
    Returns the first value in the window
    Type Parameters:
    V - the type of field
    Parameters:
    extractor - field extractor
    Returns:
    the first value
    Since:
    4.0.0
  - <V> public V lag(Function<? super T, ? extends V> extractor)
    
    Returns the previous value in the window, similar to SQL's lag()
    Parameters:
    extractor - field extractor
    Type Parameters:
    V - the type of field
    Returns:
    the previous value
    Since:
    4.0.0
  - <V> public V lag(Function<? super T, ? extends V> extractor, long lag)
    
    Returns the previous value in the window, similar to SQL's lag()
    Parameters:
    extractor - field extractor
    lag - the offset
    Type Parameters:
    V - the type of field
    Returns:
    the previous value
    Since:
    4.0.0
  - <V> public V lag(Function<? super T, ? extends V> extractor, long lag, V def)
    
    Returns the previous value by lag in the window, similar to SQL's lag()
    Type Parameters:
    V - the type of field
    Parameters:
    extractor - field extractor
    lag - the offset
    def - the default value
    Returns:
    the previous value by lag
    Since:
    4.0.0
  - <V> public V lastValue(Function<? super T, ? extends V> extractor)
    
    Returns the last value in the window
    Type Parameters:
    V - the type of field
    Parameters:
    extractor - field extractor
    Returns:
    the last value
    Since:
    4.0.0
  - <V> public V lead(Function<? super T, ? extends V> extractor)
    
    Returns the next value in the window, similar to SQL's lead()
    Parameters:
    extractor - field extractor
    Type Parameters:
    V - the type of field
    Returns:
    the next value
    Since:
    4.0.0
  - <V> public V lead(Function<? super T, ? extends V> extractor, long lead)
    
    Returns the next value in the window, similar to SQL's lead()
    Parameters:
    extractor - field extractor
    lead - the offset
    Type Parameters:
    V - the type of field
    Returns:
    the next value
    Since:
    4.0.0
  - <V> public V lead(Function<? super T, ? extends V> extractor, long lead, V def)
    
    Returns the next value by lead in the window, similar to SQL's lead()
    Type Parameters:
    V - the type of field
    Parameters:
    extractor - field extractor
    lead - the offset
    def - the default value
    Returns:
    the next value by lead
    Since:
    4.0.0
  - <V> public V nthValue(Function<? super T, ? extends V> extractor, long index)
    
    Returns the nth value in the window
    Type Parameters:
    V - the type of field
    Parameters:
    extractor - field extractor
    index - index for value to fetch, starting with 0
    Returns:
    the nth value
    Since:
    4.0.0
  - public long ntile(long bucketCnt)
    
    Distributes rows of an ordered window into a pre-defined number of roughly equal buckets
    Parameters:
    bucketCnt - bucket count
    Returns:
    bucket index starting with 0
    Since:
    4.0.0
  - <T, U extends Comparable<? super U>> public static Window<T> of(Tuple2<T, Long> currentRecord, Partition<Tuple2<T, Long>> partition, WindowDefinition<T, U> windowDefinition)
    
    Factory method to create Window instance
    Parameters:
    currentRecord - current record
    partition - the partition where the window is constructed
    windowDefinition - window definition
    Type Parameters:
    T - the type of Window element
    U - the type of field to sort
    Returns:
    the Window instance
    Since:
    4.0.0
  - public BigDecimal percentRank()
    
    Returns the percent rank in the window
    Returns:
    the percent rank
    Since:
    4.0.0
  - public Long rank()
    
    Returns the rank in the window
    Returns:
    the rank
    Since:
    4.0.0
  - public long rowNumber()
    
    Returns row number in the window, similar to SQL's row_number()
    Returns:
    the row number
    Since:
    4.0.0

Summary:
Method

| Detail:
Method

[Java] Interface Window<T>

Methods Summary

Inherited Methods Summary

Method Detail

public BigDecimal cumeDist()

public Long denseRank()

<V> public V firstValue(Function<? super T, ? extends V> extractor)

<V> public V lag(Function<? super T, ? extends V> extractor)

<V> public V lag(Function<? super T, ? extends V> extractor, long lag)

<V> public V lag(Function<? super T, ? extends V> extractor, long lag, V def)

<V> public V lastValue(Function<? super T, ? extends V> extractor)

<V> public V lead(Function<? super T, ? extends V> extractor)

<V> public V lead(Function<? super T, ? extends V> extractor, long lead)

<V> public V lead(Function<? super T, ? extends V> extractor, long lead, V def)

<V> public V nthValue(Function<? super T, ? extends V> extractor, long index)

public long ntile(long bucketCnt)

<T, U extends Comparable<? super U>> public static Window<T> of(Tuple2<T, Long> currentRecord, Partition<Tuple2<T, Long>> partition, WindowDefinition<T, U> windowDefinition)

public BigDecimal percentRank()

public Long rank()

public long rowNumber()