Package org.apache.hadoop.yarn.api.resource

Class PlacementConstraint.TargetExpression

java.lang.Object

org.apache.hadoop.yarn.api.resource.PlacementConstraint.TargetExpression

All Implemented Interfaces:

PlacementConstraint.Visitable

Enclosing class:

PlacementConstraint

public static class PlacementConstraint.TargetExpression
extends Object
implements PlacementConstraint.Visitable

Class representing the target expressions that are used in placement constraints. They might refer to expressions on node attributes, allocation tags, or be self-targets (referring to the allocation to which the constraint is attached).

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	PlacementConstraint.TargetExpression.TargetType	Enum specifying the type of the target expression.

Constructor Summary

Constructors

Constructor	Description
TargetExpression(PlacementConstraint.TargetExpression.TargetType targetType)
TargetExpression(PlacementConstraint.TargetExpression.TargetType targetType, String targetKey, String... targetValues)
TargetExpression(PlacementConstraint.TargetExpression.TargetType targetType, String targetKey, Set<String> targetValues)

Method Summary

Modifier and Type	Method	Description
<T> T	accept(PlacementConstraint.Visitor<T> visitor)	Visitor pattern.
boolean	equals(Object o)
String	getTargetKey()	Get the key of the target expression.
PlacementConstraint.TargetExpression.TargetType	getTargetType()	Get the type of the target expression.
Set<String>	getTargetValues()	Get the set of values of the target expression.
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

TargetExpression

public TargetExpression(PlacementConstraint.TargetExpression.TargetType targetType,
 String targetKey,
 Set<String> targetValues)

TargetExpression

public TargetExpression(PlacementConstraint.TargetExpression.TargetType targetType)

TargetExpression

public TargetExpression(PlacementConstraint.TargetExpression.TargetType targetType,
 String targetKey,
 String... targetValues)

Method Details

getTargetType

public PlacementConstraint.TargetExpression.TargetType getTargetType()

Get the type of the target expression.

Returns:

the type of the target expression

getTargetKey

public String getTargetKey()

Get the key of the target expression.

Returns:

the key of the target expression

getTargetValues

public Set<String> getTargetValues()

Get the set of values of the target expression.

Returns:

the set of values of the target expression

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object

accept

public <T> T accept(PlacementConstraint.Visitor<T> visitor)

Description copied from interface: PlacementConstraint.Visitable

Visitor pattern.

Specified by:

accept in interface PlacementConstraint.Visitable

Type Parameters:

T - defines the type that the visitor will use and the return type of the accept.

Parameters:

visitor - visitor to be used

Returns:

the result of visiting a given object.