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

protected Expression	expr
protected boolean	isRoot
protected Type	type

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

source, sourceProperty

Constructor Summary

protected	PathNode(PathNode source, java.lang.String sourceProperty)
protected	PathNode(PathNode source, java.lang.String sourceProperty, Expression expr)
protected	PathNode(Type type)

Method Summary

protected PathNode	getSource()
protected java.lang.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	wildcard()

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,
                   java.lang.String sourceProperty)

PathNode

protected PathNode(PathNode source,
                   java.lang.String sourceProperty,
                   Expression expr)

Method Detail

isRoot

public boolean isRoot()

getSource

protected PathNode getSource()

getSourceProperty

protected java.lang.String getSourceProperty()

wildcard

public Wildcard wildcard()

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