com.espertech.esper.event.property

Class PropertyParser

java.lang.Object

com.espertech.esper.event.property.PropertyParser

public class PropertyParser
extends Object

Parser for property names that can be simple, nested, mapped or a combination of these. Uses ANTLR parser to parse.

Constructor Summary

Constructors

Constructor and Description
PropertyParser()

Method Summary

Modifier and Type	Method and Description
static boolean	isNestedPropertyWithNonSimpleLead(EsperEPL2GrammarParser.EventPropertyContext ctx)
static boolean	isPropertyDynamic(EsperEPL2GrammarParser.StartEventPropertyRuleContext ast) Returns true if the property is a dynamic property.
static EsperEPL2GrammarParser.StartEventPropertyRuleContext	parse(String propertyName) Parses a given property name returning an AST.
static Property	parseAndWalk(String property, boolean isRootedDynamic)
static Property	parseAndWalkLaxToSimple(String property) Parses property.
static String	unescapeBacktick(String unescapedPropertyName)
static Property	walk(EsperEPL2GrammarParser.StartEventPropertyRuleContext tree, boolean isRootedDynamic) Parse the given property name returning a Property instance for the property.

Methods inherited from class java.lang.Object

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

Constructor Detail

PropertyParser

public PropertyParser()

Method Detail

parseAndWalk

public static Property parseAndWalk(String property,
                                    boolean isRootedDynamic)

parseAndWalkLaxToSimple

public static Property parseAndWalkLaxToSimple(String property)

Parses property. For cases when the property is not following the property syntax assume we act lax and assume its a simple property.

Parameters:

property - to parse

Returns:

property or SimpleProperty if the property cannot be parsed

walk

public static Property walk(EsperEPL2GrammarParser.StartEventPropertyRuleContext tree,
                            boolean isRootedDynamic)

Parse the given property name returning a Property instance for the property.

Parameters:

isRootedDynamic - is true to indicate that the property is already rooted in a dynamic property and therefore all child properties should be dynamic properties as well

tree - tree

Returns:

Property instance for property

parse

public static EsperEPL2GrammarParser.StartEventPropertyRuleContext parse(String propertyName)

Parses a given property name returning an AST.

Parameters:

propertyName - to parse

Returns:

AST syntax tree

isPropertyDynamic

public static boolean isPropertyDynamic(EsperEPL2GrammarParser.StartEventPropertyRuleContext ast)

Returns true if the property is a dynamic property.

Parameters:

ast - property ast

Returns:

dynamic or not

unescapeBacktick

public static String unescapeBacktick(String unescapedPropertyName)

isNestedPropertyWithNonSimpleLead

public static boolean isNestedPropertyWithNonSimpleLead(EsperEPL2GrammarParser.EventPropertyContext ctx)