org.plasma.query.dsl

Class PathNode

java.lang.Object

org.plasma.query.dsl.DomainObject

org.plasma.query.dsl.PathNode

All Implemented Interfaces:

PathProperty, Property, Term

Direct Known Subclasses:

DomainRoot

public class PathNode
extends DomainObject
implements PathProperty

A domain object which is not an end point but a single step within a path within a query graph.

Field Summary

Fields

Modifier and Type	Field and Description
protected Expression	expr
protected boolean	isRoot
protected Type	type

Fields inherited from class org.plasma.query.dsl.DomainObject

source, sourceProperty

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	PathNode(PathNode source, String sourceProperty)
protected	PathNode(PathNode source, String sourceProperty, Expression expr)
protected	PathNode(Type type)

Method Summary

Modifier and Type	Method and Description
Wildcard	dataWildcard() Returns all data properties for current Type.
protected PathNode	getSource()
protected String	getSourceProperty()
Expression	group(Expression source)
Expression	isNotNull() Returns a boolean expression where this property is not equal to null.
Expression	isNull() Returns a boolean expression where this property is equal to null.
boolean	isRoot()
Wildcard	referenceWildcard() Returns all reference properties for current Type.
Wildcard	subclassDataWildcard() Returns all data properties for current Type and all of its sub types.
Wildcard	wildcard() Returns all data properties for current Type.

Methods inherited from class java.lang.Object

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

Field Detail

type

protected Type type

isRoot

protected boolean isRoot

expr

protected Expression expr

Constructor Detail

PathNode

protected PathNode(Type type)

PathNode

protected PathNode(PathNode source,
                   String sourceProperty)

PathNode

protected PathNode(PathNode source,
                   String sourceProperty,
                   Expression expr)

Method Detail

isRoot

public boolean isRoot()

getSource

protected PathNode getSource()

getSourceProperty

protected String getSourceProperty()

wildcard

public Wildcard wildcard()

Returns all data properties for current Type. The current Type is the domain classifier or class for the current query path step or segment.

Returns:

all data properties for current Type.

dataWildcard

public Wildcard dataWildcard()

Returns all data properties for current Type. The current Type is the domain classifier or class for the current query path step or segment.

Returns:

all data properties for current Type.

referenceWildcard

public Wildcard referenceWildcard()

Returns all reference properties for current Type. The current Type is the domain classifier or class for the current query path step or segment.

Returns:

all reference properties for current Type.

subclassDataWildcard

public Wildcard subclassDataWildcard()

Returns all data properties for current Type and all of its sub types. The current Type is the domain classifier or class for the current query path step or segment.

Returns:

all data properties for current Type and all of its sub types.

group

public Expression group(Expression source)

isNotNull

public Expression isNotNull()

Description copied from interface: PathProperty

Returns a boolean expression where this property is not equal to null.

Specified by:

isNotNull in interface PathProperty

Returns:

the boolean expression

isNull

public Expression isNull()

Description copied from interface: PathProperty

Returns a boolean expression where this property is equal to null.

Specified by:

isNull in interface PathProperty

Returns:

the boolean expression