org.apache.camel.language.simple
Class SimpleLanguage

java.lang.Object
  org.apache.camel.language.simple.SimpleLanguageSupport
      org.apache.camel.language.simple.SimpleLanguage

All Implemented Interfaces:

IsSingleton, Language

public class SimpleLanguage
extends SimpleLanguageSupport

A simple language which maps simple property style notations to access headers and bodies. Examples of supported expressions are:

• id to access the inbound message id
• in.body or body to access the inbound body
• out.body to access the inbound body
• in.header.foo or header.foo to access an inbound header called 'foo'
• out.header.foo to access an outbound header called 'foo'
• property.foo to access the exchange property called 'foo'
• sys.foo to access the system property called 'foo'
• exception.messsage to access the exception message
• date:<command>:<pattern> for date formatting using the SimpleDateFormat patterns. Supported commands are: now for current timestamp, in.header.xxx or header.xxx to use the Date object in the in header. out.header.xxx to use the Date object in the out header.
• bean:<bean expression> to invoke a bean using the BeanLanguage

The simple language now also includes file language out of the box which means the following expression is also supported:

• file:name to access the file name (is relative, see note below))
• file:name.noext to access the file name with no extension
• file:ext to access the file extension
• file:onlyname to access the file name (no paths)
• file:onlyname.noext to access the file name (no paths) with no extension
• file:parent to access the parent file name
• file:path to access the file path name
• file:absolute is the file regarded as absolute or relative
• file:absolute.path to access the absolute file path name
• file:length to access the file length as a Long type
• file:modified to access the file last modified as a Date type
• date:<command>:<pattern> for date formatting using the SimpleDateFormat patterns. Additional Supported commands are: file for the last modified timestamp of the file. All the commands from SimpleLanguage is also available.

The relative file is the filename with the starting directory clipped, as opposed to path that will return the full path including the starting directory.
The only file is the filename only with all paths clipped.

Version:

$Revision: 898656 $

Field Summary

Fields inherited from class org.apache.camel.language.simple.SimpleLanguageSupport

GROUP_PATTERN, log, PATTERN, RANGE_PATTERN

Constructor Summary

SimpleLanguage()

Method Summary

protected Expression	createSimpleExpression(String expression, boolean strict) Creates the simple expression based on the extracted content from the ${ } place holders
Expression	createSimpleFileExpression(String remainder)
boolean	isSingleton() Wheter this class supports being singleton or not.
static Expression	simple(String expression)

Methods inherited from class org.apache.camel.language.simple.SimpleLanguageSupport

createComplexConcatExpression, createConstantExpression, createConstantExpression, createExpression, createPredicate, createSimpleOrConstantExpression, ifStartsWithReturnRemainder

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleLanguage

public SimpleLanguage()

Method Detail

simple

public static Expression simple(String expression)

createSimpleExpression

protected Expression createSimpleExpression(String expression,
                                            boolean strict)

Description copied from class: SimpleLanguageSupport

Creates the simple expression based on the extracted content from the ${ } place holders

Specified by:

createSimpleExpression in class SimpleLanguageSupport

Parameters:

expression - the content between ${ and }

strict - whether it is strict mode or not, if strict it will throw a ExpressionIllegalSyntaxException if the expression was not known. Set to false to support constant expressions

Returns:

the expression

createSimpleFileExpression

public Expression createSimpleFileExpression(String remainder)

isSingleton

public boolean isSingleton()

Description copied from interface: IsSingleton

Wheter this class supports being singleton or not.

Returns:

true to be a single shared instance, false to create new instances.