Class MongoDBWeekdayOfDateFunction

java.lang.Object

com.kingsrook.qqq.backend.module.mongodb.fieldfunctions.MongoDBWeekdayOfDateFunction

All Implemented Interfaces:

BackendFieldFunctionAdapterInterface, MongoDBFieldFunctionAdapterInterface, Serializable

public class MongoDBWeekdayOfDateFunction
extends Object
implements MongoDBFieldFunctionAdapterInterface

MongoDB adapter for WeekdayOfDateFunction. MongoDB $dayOfWeek returns Sun=1..Sat=7. ISO-8601 needs Mon=1..Sun=7. Conversion: ((mongoDow + 5) % 7) + 1 For ORDER BY with sortSundayFirst=true: isoValue % 7 so Sunday(7) becomes 0 and sorts before Monday(1).

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
MongoDBWeekdayOfDateFunction()

Method Summary

Modifier and Type	Method	Description
protected Object	buildIsoExpression(String fieldReference)	Build the ISO-8601 weekday expression from a MongoDB $dayOfWeek value.
Object	getExpression(String fieldReference, FieldFunction fieldFunction, Function<String,String> fieldNameToFieldReference)	Returns a MongoDB aggregation expression for the given field reference.
Object	getExpressionForOrderBy(String fieldReference, FieldFunction fieldFunction, Function<String,String> fieldNameToFieldReference)	Returns a MongoDB aggregation expression for use specifically in $sort stages.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

MongoDBWeekdayOfDateFunction

public MongoDBWeekdayOfDateFunction()

Method Details

getExpression

public Object getExpression(String fieldReference,
 FieldFunction fieldFunction,
 Function<String,String> fieldNameToFieldReference)

Description copied from interface: MongoDBFieldFunctionAdapterInterface

Returns a MongoDB aggregation expression for the given field reference. The fieldReference is a "$"-prefixed field name (e.g., "$firstName").

Specified by:

getExpression in interface MongoDBFieldFunctionAdapterInterface

Parameters:

fieldReference - "$"-prefixed field name for the function's source field.

fieldFunction - the function with arguments.

fieldNameToFieldReference - resolves a QQQ field name to its "$"-prefixed MongoDB field reference (e.g., "timeZone" → "$time_zone"). Useful when the function expression needs to reference additional fields on the same document (e.g., a per-row timezone field).

getExpressionForOrderBy

public Object getExpressionForOrderBy(String fieldReference,
 FieldFunction fieldFunction,
 Function<String,String> fieldNameToFieldReference)

Description copied from interface: MongoDBFieldFunctionAdapterInterface

Returns a MongoDB aggregation expression for use specifically in $sort stages. Defaults to getExpression(); may be overridden when the sort form differs (e.g., a modulo for Sunday-first weekday sorting).

Specified by:

getExpressionForOrderBy in interface MongoDBFieldFunctionAdapterInterface

buildIsoExpression

protected Object buildIsoExpression(String fieldReference)

Build the ISO-8601 weekday expression from a MongoDB $dayOfWeek value. MongoDB: Sun=1, Mon=2, ..., Sat=7 ISO: Mon=1, Tue=2, ..., Sun=7 Formula: ((mongoDow + 5) % 7) + 1