org.springframework.cloud.dataflow.core.dsl

Class TaskValidatorVisitor

java.lang.Object

org.springframework.cloud.dataflow.core.dsl.TaskVisitor

org.springframework.cloud.dataflow.core.dsl.TaskValidatorVisitor

public class TaskValidatorVisitor
extends TaskVisitor

Visitor for a parsed task that verifies it is coherent. Rules being checked:

• Any secondary sequences are labeled (otherwise they are unreachable).
• Cannot label two things with the same string.
• All target labels used on transitions must exist.
• Two references to the same app must be labeled to differentiate them
• Do not use split construct with only one flow inside

Author:

Andy Clement

Constructor Summary

Constructors

Constructor and Description
TaskValidatorVisitor()

Method Summary

Modifier and Type	Method and Description
void	endVisit() The last call made to a visitor.
List<TaskValidationProblem>	getProblems()
boolean	hasProblems()
boolean	preVisit(SplitNode split)
boolean	preVisitSequence(LabelledTaskNode firstNode, int sequenceNumber)
void	reset()
void	startVisit(String taskName, String taskDsl) The first call made to a visitor.
void	visit(TaskAppNode taskApp)
void	visit(TransitionNode transition)

Methods inherited from class org.springframework.cloud.dataflow.core.dsl.TaskVisitor

postVisit, postVisit, postVisit, postVisit, postVisitSequence, preVisit, preVisit, preVisit, visit, visit

Methods inherited from class java.lang.Object

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

Constructor Detail

TaskValidatorVisitor

public TaskValidatorVisitor()

Method Detail

getProblems

public List<TaskValidationProblem> getProblems()

hasProblems

public boolean hasProblems()

reset

public void reset()

startVisit

public void startVisit(String taskName,
                       String taskDsl)

Description copied from class: TaskVisitor

The first call made to a visitor.

Overrides:

startVisit in class TaskVisitor

Parameters:

taskName - the name of the task definition

taskDsl - the textual definition of the AST being visited

preVisitSequence

public boolean preVisitSequence(LabelledTaskNode firstNode,
                                int sequenceNumber)

Overrides:

preVisitSequence in class TaskVisitor

Parameters:

firstNode - the first node in the sequence

sequenceNumber - the sequence number, where the primary sequence is 0

Returns:

false to skip visiting the specified sequence

preVisit

public boolean preVisit(SplitNode split)

Overrides:

preVisit in class TaskVisitor

Parameters:

split - the split which represents things to execute in parallel

Returns:

false to skip visiting this split

visit

public void visit(TaskAppNode taskApp)

Overrides:

visit in class TaskVisitor

visit

public void visit(TransitionNode transition)

Overrides:

visit in class TaskVisitor

endVisit

public void endVisit()

Description copied from class: TaskVisitor

The last call made to a visitor.

Overrides:

endVisit in class TaskVisitor