org.apache.hadoop.yarn.util.constraint

Interface PlacementConstraintParser.ConstraintTokenizer

All Superinterfaces:

Enumeration<String>

All Known Implementing Classes:

PlacementConstraintParser.BaseStringTokenizer, PlacementConstraintParser.ConjunctionTokenizer, PlacementConstraintParser.MultipleConstraintsTokenizer, PlacementConstraintParser.SourceTagsTokenizer

Enclosing class:

PlacementConstraintParser

public static interface PlacementConstraintParser.ConstraintTokenizer
extends Enumeration<String>

Tokenizer interface that used to parse an expression. It first validates if the syntax of the given expression is valid, then traverse the expression and parse it to an enumeration of strings. Each parsed string can be further consumed by a PlacementConstraintParser.ConstraintParser and transformed to a PlacementConstraint.AbstractConstraint.

Method Summary

Modifier and Type	Method and Description
default void	validate() Validate the schema before actual parsing the expression.

Methods inherited from interface java.util.Enumeration

hasMoreElements, nextElement

Method Detail

validate

default void validate()
               throws PlacementConstraintParseException

Validate the schema before actual parsing the expression.

Throws:

PlacementConstraintParseException - when the placement constraint parser fails to parse an expression.