com.querydsl.core.support

Class PathsExtractor

java.lang.Object

com.querydsl.core.support.PathsExtractor

All Implemented Interfaces:

Visitor<Void,List<Path<?>>>

public final class PathsExtractor
extends Object
implements Visitor<Void,List<Path<?>>>

Extracts the paths that occurs in an expression via breadth first search

Author:

tiwe

Field Summary

Fields

Modifier and Type	Field and Description
static PathsExtractor	DEFAULT

Method Summary

Methods

Modifier and Type	Method and Description
Path<?>	visit(Collection<?> exprs, List<Path<?>> paths)
Void	visit(Constant<?> expr, List<Path<?>> paths) Visit a Contant instance with the given context
Void	visit(FactoryExpression<?> expr, List<Path<?>> paths) Visit a FactoryExpression instance with the given context
Void	visit(Operation<?> expr, List<Path<?>> paths) Vist a Operation instance with the given context
Void	visit(ParamExpression<?> expr, List<Path<?>> paths) Visit a ParamExpression instance with the given context
Void	visit(Path<?> expr, List<Path<?>> paths) Visit a Path instance with the given context
Void	visit(SubQueryExpression<?> expr, List<Path<?>> paths) Visit a SubQueryExpression instance with the given context
Void	visit(TemplateExpression<?> expr, List<Path<?>> paths) Visit a TemplateExpression instance with the given context

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT

public static final PathsExtractor DEFAULT

Method Detail

visit

public Void visit(Constant<?> expr,
         List<Path<?>> paths)

Description copied from interface: Visitor

Visit a Contant instance with the given context

Specified by:

visit in interface Visitor<Void,List<Path<?>>>

Parameters:

expr - expression to visit

paths - context of the visit or null, if not used

Returns:

visit result

visit

public Void visit(FactoryExpression<?> expr,
         List<Path<?>> paths)

Description copied from interface: Visitor

Visit a FactoryExpression instance with the given context

Specified by:

visit in interface Visitor<Void,List<Path<?>>>

Parameters:

expr - expression to visit

paths - context of the visit or null, if not used

Returns:

visit result

visit

public Void visit(Operation<?> expr,
         List<Path<?>> paths)

Description copied from interface: Visitor

Vist a Operation instance with the given context

Specified by:

visit in interface Visitor<Void,List<Path<?>>>

Parameters:

expr - expression to visit

paths - context of the visit or null, if not used

Returns:

visit result

visit

public Void visit(ParamExpression<?> expr,
         List<Path<?>> paths)

Description copied from interface: Visitor

Visit a ParamExpression instance with the given context

Specified by:

visit in interface Visitor<Void,List<Path<?>>>

Parameters:

expr - expression to visit

paths - context of the visit or null, if not used

Returns:

visit result

visit

public Void visit(Path<?> expr,
         List<Path<?>> paths)

Description copied from interface: Visitor

Visit a Path instance with the given context

Specified by:

visit in interface Visitor<Void,List<Path<?>>>

Parameters:

expr - expression to visit

paths - context of the visit or null, if not used

Returns:

visit result

visit

public Void visit(SubQueryExpression<?> expr,
         List<Path<?>> paths)

Description copied from interface: Visitor

Visit a SubQueryExpression instance with the given context

Specified by:

visit in interface Visitor<Void,List<Path<?>>>

Parameters:

expr - expression to visit

paths - context of the visit or null, if not used

Returns:

visit result

visit

public Void visit(TemplateExpression<?> expr,
         List<Path<?>> paths)

Description copied from interface: Visitor

Visit a TemplateExpression instance with the given context

Specified by:

visit in interface Visitor<Void,List<Path<?>>>

Parameters:

expr - expression to visit

paths - context of the visit or null, if not used

Returns:

visit result

visit

public Path<?> visit(Collection<?> exprs,
            List<Path<?>> paths)