com.asakusafw.dmdl.model

Class AstJoin

java.lang.Object

com.asakusafw.dmdl.model.AbstractAstNode

com.asakusafw.dmdl.model.AstJoin

All Implemented Interfaces:

AstExpression<AstJoin>, AstNode, AstTerm<AstJoin>

public class AstJoin
extends AbstractAstNode
implements AstTerm<AstJoin>

Represents a term of join model.

Since:

0.2.0

Nested Class Summary

Nested classes/interfaces inherited from interface com.asakusafw.dmdl.model.AstNode

AstNode.AbstractVisitor<C,R>, AstNode.Visitor<C,R>

Field Summary

Fields

Modifier and Type	Field and Description
AstGrouping	grouping The grouping properties for each equivalent join.
AstModelMapping	mapping The mapping function how to convert join target to the result model.
AstModelReference	reference The reference to the join target model.

Constructor Summary

Constructors

Constructor and Description
AstJoin(Region region, AstModelReference reference, AstModelMapping mapping, AstGrouping grouping) Creates and returns a new instance.

Method Summary

Modifier and Type	Method and Description
<C,R> R	accept(C context, AstNode.Visitor<C,R> visitor) Accepts and calls back the visitor.
boolean	equals(Object obj)
Region	getRegion() Returns the region of this node.
AstJoin	getUnit() Returns itself.
int	hashCode()

Methods inherited from class java.lang.Object

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

Field Detail

reference

public final AstModelReference reference

The reference to the join target model.

mapping

public final AstModelMapping mapping

The mapping function how to convert join target to the result model.

This can be null if mapping is identity.

grouping

public final AstGrouping grouping

The grouping properties for each equivalent join.

This can be null if use total grouping.

Constructor Detail

AstJoin

public AstJoin(Region region,
               AstModelReference reference,
               AstModelMapping mapping,
               AstGrouping grouping)

Creates and returns a new instance.

Parameters:

region - the region of this node on the enclosing script, or null if unknown

reference - the reference to the join target model

mapping - the mapping function, or null on identity mapping

grouping - the grouping properties, or null on total grouping

Throws:

IllegalArgumentException - if some parameters were null

Method Detail

getRegion

public Region getRegion()

Description copied from interface: AstNode

Returns the region of this node.

Specified by:

getRegion in interface AstNode

Returns:

the region, or null if unknown

getUnit

public AstJoin getUnit()

Description copied from interface: AstTerm

Returns itself.

Specified by:

getUnit in interface AstTerm<AstJoin>

Returns:

this

accept

public <C,R> R accept(C context,
                      AstNode.Visitor<C,R> visitor)

Description copied from interface: AstNode

Accepts and calls back the visitor.

Specified by:

accept in interface AstNode

Type Parameters:

C - type of visitor context

R - type of visitor result

Parameters:

context - the visitor context

visitor - the visitor to call back

Returns:

call back result

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object