Module org.tentackle.wurblet

Package org.tentackle.wurblet

Class JoinPath

java.lang.Object

org.tentackle.wurblet.JoinPath

All Implemented Interfaces:

org.tentackle.common.Path<JoinPath,Join>

public class JoinPath
extends Object
implements org.tentackle.common.Path<JoinPath,Join>

Path of Joins.

Author:

harald

Constructor Summary

Constructors

Constructor	Description
JoinPath(List<Join> elements, List<JoinPath> paths)	Creates a relation path.
JoinPath(Join element, List<JoinPath> paths)	Creates a normalized relation path.

Method Summary

Modifier and Type	Method	Description
Join	findJoin(List<WurbletRelation> wurbletRelations)	Find the join for given relation path.
Join	findJoin(Entity component)	Finds the join for a given component.
List<Join>	getElements()
List<JoinPath>	getPaths()
boolean	isFiltered(boolean componentsOnly)	Returns whether at least one join path contains a filter expression.
void	normalize()	Normalizes the join and all subjoins. A normalized join contains only a single element.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

JoinPath

public JoinPath(List<Join> elements,
 List<JoinPath> paths)

Creates a relation path.

Parameters:

elements - the relations, null or empty if none

paths - the continuation paths, null or empty if none

JoinPath

public JoinPath(Join element,
 List<JoinPath> paths)

Creates a normalized relation path.

Parameters:

element - the relation

paths - the continuation paths, null or empty if none

Method Details

getElements

public List<Join> getElements()

Specified by:

getElements in interface org.tentackle.common.Path<JoinPath,Join>

getPaths

public List<JoinPath> getPaths()

Specified by:

getPaths in interface org.tentackle.common.Path<JoinPath,Join>

isFiltered

public boolean isFiltered(boolean componentsOnly)

Returns whether at least one join path contains a filter expression.

Parameters:

componentsOnly - true if check component relations only

Returns:

true if filtered, false if no filter found

findJoin

public Join findJoin(Entity component)
              throws org.wurbelizer.wurbel.WurbelException

Finds the join for a given component.

Parameters:

component - the component

Returns:

the path if unique, null if no path

Throws:

org.wurbelizer.wurbel.WurbelException - if component path is ambiguous

findJoin

public Join findJoin(List<WurbletRelation> wurbletRelations)

Find the join for given relation path.

Parameters:

wurbletRelations - the relation path

Returns:

the join if found, else null

normalize

public void normalize()

Normalizes the join and all subjoins.
A normalized join contains only a single element.

toString

public String toString()

Overrides:

toString in class Object