Chapter 1. Introduction

Abstract

This chapter provides an overview of all the expression languages supported by Apache Camel.

1.1. Overview of the Languages
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Table 1.1, “Expression and Predicate Languages” gives an overview of the different syntaxes for invoking expression and predicate languages.

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Table 1.1. Expression and Predicate Languages
Language	Static Method	Fluent DSL Method	XML Element	Annotation	Artifact
section "Bean Integration" in "Implementing Enterprise Integration Patterns"	`bean()`	`EIP().method()`	`method`	`@Bean`	Camel core
Constant	`constant()`	`EIP().constant()`	`constant`	`@Constant`	Camel core
EL	`el()`	`EIP().el()`	`el`	`@EL`	`camel-juel`
Groovy	`groovy()`	`EIP().groovy()`	`groovy`	`@Groovy`	`camel-groovy`
Header	`header()`	`EIP().header()`	`header`	`@Header`	Camel core
JavaScript	`javaScript()`	`EIP().javaScript()`	`javaScript`	`@JavaScript`	`camel-script`
JoSQL	`sql()`	`EIP().sql()`	`sql`	`@SQL`	`camel-josql`
JXPath	None	`EIP().jxpath()`	`jxpath`	`@JXPath`	`camel-jxpath`
MVEL	`mvel()`	`EIP().mvel()`	`mvel`	`@MVEL`	`camel-mvel`
OGNL	`ognl()`	`EIP().ognl()`	`ognl`	`@OGNL`	`camel-ognl`
PHP	`php()`	`EIP().php()`	`php`	`@PHP`	`camel-script`
Property	`property()`	`EIP().property()`	`property`	`@Property`	Camel core
Python	`python()`	`EIP().python()`	`python`	`@Python`	`camel-script`
Ref	`ref()`	`EIP().ref()`	`ref`	N/A	Camel core
Ruby	`ruby()`	`EIP().ruby()`	`ruby`	`@Ruby`	`camel-script`
Simple/File	`simple()`	`EIP().simple()`	`simple`	`@Simple`	Camel core
SpEL	`spel()`	`EIP().spel()`	`spel`	`@SpEL`	`camel-spring`
XPath	`xpath()`	`EIP().xpath()`	`xpath`	`@XPath`	Camel core
XQuery	`xquery()`	`EIP().xquery()`	`xquery`	`@XQuery`	`camel-saxon`