com.espertech.esper.util
Class PlaceholderParser

java.lang.Object
  com.espertech.esper.util.PlaceholderParser

public class PlaceholderParser
extends java.lang.Object

Parser for strings with substitution parameters of the form ${parameter}.

Nested Class Summary

static class	PlaceholderParser.Fragment Fragment is a parse result, a parse results in an ordered list of fragments.
static class	PlaceholderParser.ParameterFragment Represents a parameter in a parsed string of texts and parameters.
static class	PlaceholderParser.TextFragment Represents a piece of text in a parse string with placeholder values.

Constructor Summary

PlaceholderParser()

Method Summary

static java.util.List<PlaceholderParser.Fragment>

parsePlaceholder(java.lang.String parseString) Parses a string to find placeholders of format ${placeholder}.

Methods inherited from class java.lang.Object

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

Constructor Detail

PlaceholderParser

public PlaceholderParser()

Method Detail

parsePlaceholder

public static java.util.List<PlaceholderParser.Fragment> parsePlaceholder(java.lang.String parseString)
                                                                   throws PlaceholderParseException

Parses a string to find placeholders of format ${placeholder}.

Example: "My ${thing} is ${color}"

The example above parses into 4 fragements: a text fragment of value "My ", a parameter fragment "thing", a text fragement " is " and a parameter fragment "color".

Parameters:

parseString - is the string to parse

Returns:

list of fragements that can be either text fragments or placeholder fragments

Throws:

PlaceholderParseException - if the string cannot be parsed to indicate syntax errors