org.trimou.handlebars

Class NumericExpressionHelper

java.lang.Object

org.trimou.engine.config.AbstractConfigurationAware

org.trimou.handlebars.AbstractHelper

org.trimou.handlebars.BasicHelper

org.trimou.handlebars.NumericExpressionHelper

All Implemented Interfaces:

ConfigurationAware, Helper

public class NumericExpressionHelper
extends BasicHelper

A simple numeric expression helper. During evaluation all the params are converted to BigDecimals.

 {{numExpr val op="neg" out='It is a negative number!'}}
 {{#numExpr val "90" op="gt"}}
  val > 90
 {{/numExpr}}
 {{#numExpr val 10 op="eq"}}
  val == 10
 {{/numExpr}}
 {{#numExpr val1 val2 op="le"}}
  val1 <= val2
 {{/numExpr}}
 {{#numExpr val "1" 2 '3' op="in"}}
  val = 1 or val = 2 or val = 3
 {{/numExpr}}
 

Author:

Martin Kouba

Field Summary

Fields inherited from class org.trimou.handlebars.BasicHelper

HELPER_TAG_TYPES, NO_SUPPORTED_HASH_KEYS

Fields inherited from class org.trimou.engine.config.AbstractConfigurationAware

configuration

Constructor Summary

Constructors

Constructor and Description
NumericExpressionHelper()

Method Summary

Modifier and Type	Method and Description
void	execute(Options options) Execute the helper.
void	validate(HelperDefinition definition) Helper should validate the tag definition (e.g. number of parameters) during compilation and fail fast if necessary.

Methods inherited from class org.trimou.handlebars.BasicHelper

allowedTagTypes, getSupportedHashKeys, numberOfRequiredHashEntries, numberOfRequiredParameters

Methods inherited from class org.trimou.handlebars.AbstractHelper

append, getHashValue, init, isSection, isUnescapeVariable, isVariable

Methods inherited from class org.trimou.engine.config.AbstractConfigurationAware

getConfigurationKeys, checkNotInitialized, init

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.trimou.engine.config.ConfigurationAware

getConfigurationKeys, init

Constructor Detail

NumericExpressionHelper

public NumericExpressionHelper()

Method Detail

execute

public void execute(Options options)

Description copied from interface: Helper

Execute the helper.

validate

public void validate(HelperDefinition definition)

Description copied from interface: Helper

Helper should validate the tag definition (e.g. number of parameters) during compilation and fail fast if necessary. A MustacheException with code MustacheProblem.COMPILE_HELPER_VALIDATION_FAILURE should be thrown in case of validation failure occurs.

Specified by:

validate in interface Helper

Overrides:

validate in class BasicHelper