Package io.micronaut.data.model.query.factory

Class Projections

  • public class Projections
extends java.lang.Object
    Projections used to customize the results of a query.
    Since:
    1.0
    Author:
    Graeme Rocher

    • Constructor Detail

      • Projections

        public Projections()

    • Method Detail

      • id

        public static QueryModel.IdProjection id()
        Projection used to obtain the id of an object.
        Returns:
        The IdProjection instance

      • count

        public static QueryModel.CountProjection count()
        Projection that returns the number of records from the query. instead of the results themselves
        Returns:
        The CountProjection instance

      • literal

        public static QueryModel.LiteralProjection literal​(java.lang.Object value)
        A projection that projects a simple literal.
        Parameters:
        value - The literal value
        Returns:
        The LiteralProjection instance

      • property

        public static QueryModel.PropertyProjection property​(java.lang.String name)
        A projection that obtains the value of a property of an entity.
        Parameters:
        name - The name of the property
        Returns:
        The PropertyProjection instance

      • sum

        public static QueryModel.SumProjection sum​(java.lang.String name)
        Computes the sum of a property.
        Parameters:
        name - The name of the property
        Returns:
        The PropertyProjection instance

      • min

        public static QueryModel.MinProjection min​(java.lang.String name)
        Computes the min value of a property.
        Parameters:
        name - The name of the property
        Returns:
        The PropertyProjection instance

      • max

        public static QueryModel.MaxProjection max​(java.lang.String name)
        Computes the pageSize value of a property.
        Parameters:
        name - The name of the property
        Returns:
        The PropertyProjection instance

      • avg

        public static QueryModel.AvgProjection avg​(java.lang.String name)
        Computes the average value of a property.
        Parameters:
        name - The name of the property
        Returns:
        The PropertyProjection instance

      • distinct

        public static QueryModel.DistinctProjection distinct()
        Projection that signifies to return only distinct results.
        Returns:
        Distinct projection

      • distinct

        public static QueryModel.DistinctPropertyProjection distinct​(java.lang.String property)
        Projection that signifies to return only distinct results.
        Parameters:
        property - The name of the property
        Returns:
        Distinct projection

      • countDistinct

        public static QueryModel.CountDistinctProjection countDistinct​(java.lang.String property)
        Projection that signifies to return only distinct results.
        Parameters:
        property - The name of the property
        Returns:
        Distinct projection

      • groupProperty

        public static QueryModel.GroupPropertyProjection groupProperty​(java.lang.String property)
        Defines a group by projection for datastores that support it.
        Parameters:
        property - The property name
        Returns:
        The projection list