Package org.elasticsearch.xpack.esql.plan.logical.promql.selector

Class LabelMatcher

java.lang.Object

org.elasticsearch.xpack.esql.plan.logical.promql.selector.LabelMatcher

All Implemented Interfaces:

NodeStringRenderable

public class LabelMatcher
extends Object
implements NodeStringRenderable

PromQL label matcher between a label name, a value pattern and match type (=, !=, =~, !~). Examples: {job="api"} -> [LabelMatcher("job", "api", EQ)] {status=~"5.."} -> [LabelMatcher("status", "5..", REG)] {env!~"test|dev"} -> [LabelMatcher("env", "test|dev", NREG)] {host=?_hosts} -> [LabelMatcher("host", ["34.107.161.234", "140.248.133.94"], EQ)]

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	LabelMatcher.Matcher

Field Summary

Fields

Modifier and Type	Field	Description
static final String	NAME

Constructor Summary

Constructors

Constructor	Description
LabelMatcher(String name, String value, LabelMatcher.Matcher matcher)
LabelMatcher(String name, List<String> values, LabelMatcher.Matcher matcher)

Method Summary

Modifier and Type	Method	Description
org.apache.lucene.util.automaton.Automaton	automaton()
boolean	equals(Object o)
String	getFirstValue()	Returns the single value for this matcher.
int	hashCode()
boolean	isMultiValue()	Returns true if this matcher has multiple values.
boolean	isNegation()
LabelMatcher.Matcher	matcher()
boolean	matchesAll()
boolean	matchesEmpty()
boolean	matchesNone()
String	name()
void	nodeString(StringBuilder sb, Node.NodeStringFormat format, NodeStringMapper mapper)	Routes the label name and every match value through the mapper (the match operator is structural and stays).
String	toString()
List<String>	values()	Returns all values for this matcher.

Methods inherited from class java.lang.Object

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

Field Details

NAME

public static final String NAME

See Also:

• Constant Field Values

Constructor Details

LabelMatcher

public LabelMatcher(String name,
 String value,
 LabelMatcher.Matcher matcher)

LabelMatcher

public LabelMatcher(String name,
 List<String> values,
 LabelMatcher.Matcher matcher)

Method Details

name

public String name()

getFirstValue

public String getFirstValue()

Returns the single value for this matcher. For multi-value matchers, returns the first value. Use values() to get all values.

values

public List<String> values()

Returns all values for this matcher. For single-value matchers, returns a singleton list.

isMultiValue

public boolean isMultiValue()

Returns true if this matcher has multiple values.

matcher

public LabelMatcher.Matcher matcher()

automaton

public org.apache.lucene.util.automaton.Automaton automaton()

matchesAll

public boolean matchesAll()

matchesNone

public boolean matchesNone()

matchesEmpty

public boolean matchesEmpty()

isNegation

public boolean isNegation()

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object

nodeString

public void nodeString(StringBuilder sb,
 Node.NodeStringFormat format,
 NodeStringMapper mapper)

Routes the label name and every match value through the mapper (the match operator is structural and stays). Reproduces toString()'s name op [v1, v2] shape so that under NodeStringMapper.IDENTITY this equals toString(); under an anonymizing mapper the label name and the (potentially sensitive) values tokenize.

Specified by:

nodeString in interface NodeStringRenderable