Class: PagingHeaderSet

Oracle® JavaScript Extension Toolkit (JET)
3.2.0

E87541-01

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oj. PagingHeaderSet

Version:
  • 3.2.0

Constructor

new PagingHeaderSet(headerSet, startIndex)

A HeaderSet represents a collection of headers. The HeaderSet is an object returned by the success callback of the fetchHeaders method on DataGridDataSource. This is a paging specific implementation of the HeaderSet.
Parameters:
Name Type Description
headerSet Object an headerSet object
startIndex number the true startIndex of the headerSet
Source:

Methods

#getCount() → {number}

Gets the actual count of the result set, the total indexes spanned by the headerSet along the innermost header.
Source:
Returns:
the actual count of the result set.
Type
number

#getData(index, level) → {Object}

Gets the data of the specified index. An error is throw when 1) the range is not yet available and 2) the index specified is out of bounds.
Parameters:
Name Type Argument Description
index number the absolute index of the header in which we want to retrieve the header from.
level number <optional>
the level of the header, 0 is the outermost header and increments by 1 moving inward
Source:
Returns:
the data object for the specific index.
Type
Object

#getDepth(index, level) → {number}

Gets the depth of an index starting at a particular level. The depth is the number of levels spanned by the header.
Parameters:
Name Type Argument Description
index number the absolute index of the depth to get
level number <optional>
the level of the header, 0 is the outermost header
Source:
Returns:
the number of levels spanned by the header at the specified position
Type
number

#getExtent(index, level) → {Object}

Gets the extent of an index on a particular level within the context of the headerSet. Extent is defined as the number of indexes covered by the header. If the extent extends beyond the start and end of the requested range the extent should be trimmed to the edge of the requested range and the object for {'more': {before, after}} should have the value appropriate boolean set. For innermost headers the extent will always be 1.
Parameters:
Name Type Argument Description
index number the absolute index along the innermost header of the extent to get, 0 is the first header in the data source
level number <optional>
the level of the header, 0 is the outermost header and increments by 1 moving inward
Source:
Returns:
an object containing two values extent: the number of absolute indexes spanned by the header at this index bounded by the edges of the result set for the specified axis. more: object with keys 'before'/'after' and boolean values true/false representing whether there are more indexes before/after what is in the headerSet
Type
Object
Example

In this example the header spans 5 indexes and there are more indexes to cover after the request that aren't included in this headerSet:

{'extent':5, 'more': {'before':false, 'after':true}}

#getLevelCount() → {number}

Gets the actual number of levels of the result set for the specified axis. The levels are the counted from the outermost header indexed at 0, and moving inwards toward the databody would increment the level by 1.
Source:
Returns:
the number of levels of the result set
Type
number

#getMetadata(index, level) → {Object}

Gets the metadata of the specified index. An error is throw when 1) the range is not yet available and 2) the index specified is out of bounds. The metadata that the data source can optionally return are: 1) sortDirection - the initial sort direction of the header. Valid values are "ascending" and "descending". 2) key - the key of the row/column header.
Parameters:
Name Type Argument Description
index number the absolute index of the header in which we want to retrieve the metadata from.
level number <optional>
the level of the header, 0 is the outermost header and increments by 1 moving inward
Source:
Returns:
the metadata object for the specific index.
Type
Object