Package org.opencastproject.assetmanager.api.query

Interface Field<A>

Type Parameters:

A - type of the field, e.g. String or Date.

All Known Subinterfaces:

PropertyField<A>, VersionField

All Known Implementing Classes:

AbstractSnapshotField, PropertyFieldImpl, SimpleSnapshotField, VersionFieldImpl

public interface Field<A>

A Field refers to a field in the persistence layer of the asset manager. This may either be a real field like a property or a virtual field that helps to build a predicate for a real field.

Method Summary

Modifier and Type	Method	Description
Order	asc()	Create an ascending order specifier for the field.
Order	desc()	Create a descending order specifier for the field.
Predicate	eq(A right)	Create a predicate that holds true if the field's value and constant value right are equal.
Predicate	eq(PropertyField<A> right)	Create a predicate that holds true if the field's value and the value of property field right are equal.
Predicate	exists()	Create a predicate that holds true if the field exists.
Predicate	ge(A right)	Create a predicate that holds true if the field's value is greater than constant value right or equal to it.
Predicate	ge(PropertyField<A> right)	Create a predicate that holds true if the field's value is greater than the value of property field right or equal to it.
Predicate	gt(A right)	Create a predicate that holds true if the field's value is strictly greater than constant value right.
Predicate	gt(PropertyField<A> right)	Create a predicate that holds true if the field's value is strictly greater than the value of property field right.
Predicate	le(A right)	Create a predicate that holds true if the field's value is less than constant value right or equal to it.
Predicate	le(PropertyField<A> right)	Create a predicate that holds true if the field's value is less than the value of property field right or equal to it.
Predicate	lt(A right)	Create a predicate that holds true if the field's value is strictly less than constant value right.
Predicate	lt(PropertyField<A> right)	Create a predicate that holds true if the field's value is strictly less than the value of property field right.
Predicate	notExists()	Create a predicate that holds true if the field does not exist.

Method Details

eq

Predicate eq(A right)

Create a predicate that holds true if the field's value and constant value right are equal.

eq

Predicate eq(PropertyField<A> right)

Create a predicate that holds true if the field's value and the value of property field right are equal.

lt

Predicate lt(A right)

Create a predicate that holds true if the field's value is strictly less than constant value right.

lt

Predicate lt(PropertyField<A> right)

Create a predicate that holds true if the field's value is strictly less than the value of property field right.

le

Predicate le(A right)

Create a predicate that holds true if the field's value is less than constant value right or equal to it.

le

Predicate le(PropertyField<A> right)

Create a predicate that holds true if the field's value is less than the value of property field right or equal to it.

gt

Predicate gt(A right)

Create a predicate that holds true if the field's value is strictly greater than constant value right.

gt

Predicate gt(PropertyField<A> right)

Create a predicate that holds true if the field's value is strictly greater than the value of property field right.

ge

Predicate ge(A right)

Create a predicate that holds true if the field's value is greater than constant value right or equal to it.

ge

Predicate ge(PropertyField<A> right)

Create a predicate that holds true if the field's value is greater than the value of property field right or equal to it.

exists

Predicate exists()

Create a predicate that holds true if the field exists.

notExists

Predicate notExists()

Create a predicate that holds true if the field does not exist.

desc

Order desc()

Create a descending order specifier for the field.

asc

Order asc()

Create an ascending order specifier for the field.