Chapter 158. Validation
Validation Component
The Validation component performs XML validation of the message body using the JAXP Validation API and based on any of the supported XML schema languages, which defaults to XML Schema
Note that the Jing component also supports the following useful schema languages:
The MSV component also supports RelaxNG XML Syntax.
URI format
validator:someLocalOrRemoteResource
Where someLocalOrRemoteResource is some URL to a local resource on the classpath or a full URL to a remote resource or resource on the file system which contains the XSD to validate against. For example:
msv:org/foo/bar.xsdmsv:file:../foo/bar.xsdvalidator:com/mypackage/myschema.xsd
Maven users will need to add the following dependency to their
pom.xml for this component when using Camel 2.8 or older:
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-spring</artifactId>
<version>x.x.x</version>
<!-- use the same version as your Camel core version -->
</dependency>
From Camel 2.9 onwards the Validation component is provided directly in the camel-core.
Options
| Option | Default | Description |
|---|---|---|
resourceResolver
|
null
|
Camel 2.9: Reference to a org.w3c.dom.ls.LSResourceResolver in the Registry.
|
useDom
|
false
|
Apache Camel 2.0: Whether DOMSource/{{DOMResult}} or SaxSource/{{SaxResult}} should be used by the validator.
|
useSharedSchema
|
true
|
Camel 2.3: Whether the Schema instance should be shared or not. This option is introduced to work around a JDK 1.6.x bug. Xerces should not have this issue.
|
failOnNullBody
|
true
|
Camel 2.9.5/2.10.3: Whether to fail if no body exists. |
headerName
|
null
|
Camel 2.11: To validate against a header instead of the message body. |
failOnNullHeader
|
true
|
Camel 2.11: Whether to fail if no header exists when validating against a header. |
Example
The following example shows how to configure a route from endpoint direct:start which then goes to one of two endpoints, either mock:valid or mock:invalid based on whether or not the XML matches the given schema (which is supplied on the classpath).
<route>
<from uri="direct:start"/>
<doTry>
<to uri="validator:org/apache/camel/component/validator/schema.xsd"/>
<to uri="mock:valid"/>
<doCatch>
<exception>org.apache.camel.ValidationException</exception>
<to uri="mock:invalid"/>
</doCatch>
<doFinally>
<to uri="mock:finally"/>
</doFinally>
</doTry>
</route>