Interface Expression<T>

    • Method Summary

      All Methods Instance Methods Abstract Methods 
      Modifier and Type Method Description
      <X> Expression<X> as​(java.lang.Class<X> type)
      Perform a typecast upon the expression, returning a new expression object.
      <X> Expression<X> cast​(java.lang.Class<X> type)
      Cast this expression to the specified type, returning a new expression object.
      Predicate equalTo​(Expression<?> value)
      Create a predicate to test whether the expression is equal to the argument.
      Predicate equalTo​(java.lang.Object value)
      Create a predicate to test whether the expression is equal to the argument.
      Predicate in​(Expression<?>... values)
      Create a predicate to test whether the expression is a member of the argument list.
      Predicate in​(Expression<java.util.Collection<?>> values)
      Create a predicate to test whether the expression is a member of the collection.
      Predicate in​(java.lang.Object... values)
      Create a predicate to test whether the expression is a member of the argument list.
      Predicate in​(java.util.Collection<?> values)
      Create a predicate to test whether the expression is a member of the collection.
      Predicate isNotNull()
      Create a predicate to test whether the expression is not null.
      Predicate isNull()
      Create a predicate to test whether the expression is null.
      Predicate notEqualTo​(Expression<?> value)
      Create a predicate to test whether the expression is unequal to the argument.
      Predicate notEqualTo​(java.lang.Object value)
      Create a predicate to test whether the expression is unequal to the argument.
    • Method Detail

      • isNull

        Predicate isNull()
        Create a predicate to test whether the expression is null.
        Returns:
        predicate testing whether the expression is null
      • isNotNull

        Predicate isNotNull()
        Create a predicate to test whether the expression is not null.
        Returns:
        predicate testing whether the expression is not null
      • equalTo

        Predicate equalTo​(Expression<?> value)
        Create a predicate to test whether the expression is equal to the argument.
        Parameters:
        value - expression to be tested against
        Returns:
        predicate testing for equality
        Since:
        3.2
      • equalTo

        Predicate equalTo​(java.lang.Object value)
        Create a predicate to test whether the expression is equal to the argument.
        Parameters:
        value - value to be tested against
        Returns:
        predicate testing for equality
        Since:
        3.2
      • notEqualTo

        Predicate notEqualTo​(Expression<?> value)
        Create a predicate to test whether the expression is unequal to the argument.
        Parameters:
        value - expression to be tested against
        Returns:
        predicate testing for inequality
        Since:
        3.2
      • notEqualTo

        Predicate notEqualTo​(java.lang.Object value)
        Create a predicate to test whether the expression is unequal to the argument.
        Parameters:
        value - value to be tested against
        Returns:
        predicate testing for inequality
        Since:
        3.2
      • in

        Predicate in​(java.lang.Object... values)
        Create a predicate to test whether the expression is a member of the argument list.
        Parameters:
        values - values to be tested against
        Returns:
        predicate testing for membership
      • in

        Predicate in​(Expression<?>... values)
        Create a predicate to test whether the expression is a member of the argument list.
        Parameters:
        values - expressions to be tested against
        Returns:
        predicate testing for membership
      • in

        Predicate in​(java.util.Collection<?> values)
        Create a predicate to test whether the expression is a member of the collection.
        Parameters:
        values - collection of values to be tested against
        Returns:
        predicate testing for membership
      • in

        Predicate in​(Expression<java.util.Collection<?>> values)
        Create a predicate to test whether the expression is a member of the collection.
        Parameters:
        values - expression corresponding to collection to be tested against
        Returns:
        predicate testing for membership
      • as

        <X> Expression<X> as​(java.lang.Class<X> type)
        Perform a typecast upon the expression, returning a new expression object. Unlike cast(Class), this method does not cause type conversion: the runtime type is not changed.

        Warning: may result in a runtime failure.

        Parameters:
        type - intended type of the expression
        Returns:
        new expression of the given type
        See Also:
        cast(Class)
      • cast

        <X> Expression<X> cast​(java.lang.Class<X> type)
        Cast this expression to the specified type, returning a new expression object. Unlike as(Class), this method does result in a runtime type conversion.

        Providers are required to support casting scalar expressions to String, and String expressions to Integer, Long, Float, and Double. Support for typecasts between other basic types is not required.

        Parameters:
        type - a basic type
        Returns:
        a scalar expression of the given basic type
        Since:
        3.2