org.apache.gravitino.rel.expressions.transforms

Class Transform.SingleFieldTransform

java.lang.Object

org.apache.gravitino.rel.expressions.transforms.Transform.SingleFieldTransform

All Implemented Interfaces:

Expression, Transform

Direct Known Subclasses:

Transforms.DayTransform, Transforms.HourTransform, Transforms.IdentityTransform, Transforms.MonthTransform, Transforms.YearTransform

Enclosing interface:

Transform

public abstract static class Transform.SingleFieldTransform
extends java.lang.Object
implements Transform

Base class for simple transforms of a single field.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.gravitino.rel.expressions.transforms.Transform

Transform.SingleFieldTransform

Field Summary

Fields inherited from interface org.apache.gravitino.rel.expressions.Expression

EMPTY_EXPRESSION, EMPTY_NAMED_REFERENCE

Constructor Summary

Constructors

Constructor and Description
SingleFieldTransform()

Method Summary

Modifier and Type	Method and Description
Expression[]	arguments()
boolean	equals(java.lang.Object o)
java.lang.String[]	fieldName()
int	hashCode()
NamedReference[]	references()

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.gravitino.rel.expressions.transforms.Transform

assignments, children, name

Constructor Detail

SingleFieldTransform

public SingleFieldTransform()

Method Detail

fieldName

public java.lang.String[] fieldName()

Returns:

the referenced field name as an array of String parts.

references

public NamedReference[] references()

Specified by:

references in interface Expression

Returns:

A list of fields or columns that are referenced by this expression.

arguments

public Expression[] arguments()

Specified by:

arguments in interface Transform

Returns:

The arguments passed to the transform function.

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object