[CONF] Apache Camel > JAXB

[confluence]

JAXB Page edited by willem jiang CAMEL-2330 CAMEL-2330 JAXB JAXB is a Data Format which uses the JAXB2 XML marshalling standard which is included in Java 6 to unmarshal an XML payload into Java objects or to marshal Java objects into an XML payload. Using the Java DSL For example the following uses a named DataFormat of jaxb which is configured with a number of Java package names to initialize the JAXBContext. DataFormat jaxb = new JaxbDataFormat("com.acme.model"); from("activemq:My.Queue"). unmarshal(jaxb). to("mqseries:Another.Queue"); You can if you prefer use a named reference to a data format which can then be defined in your Registry such as via your Spring XML file. e.g. from("activemq:My.Queue"). unmarshal("myJaxbDataType"). to("mqseries:Another.Queue"); Using Spring XML The following example shows how to use JAXB to unmarshal using Spring configuring the jaxb data type <camelContext id="camel" xmlns="http://camel.apache.org/schema/spring"> <route> <from uri="direct:start"/> <unmarshal> <jaxb prettyPrint="true" contextPath="org.apache.camel.example"/> </unmarshal> <to uri="mock:result"/> </route> </camelContext> This example shows how to configure the data type just once and reuse it on multiple routes. For Camel versions below 1.5.0 you have to set the <jaxb> element directly in <camelContext>. <camelContext id="camel" xmlns="http://camel.apache.org/schema/spring"> <dataFormats> <jaxb id="myJaxb" prettyPrint="true" contextPath="org.apache.camel.example"/> </dataFormats> <route> <from uri="direct:start"/> <marshal ref="myJaxb"/> <to uri="direct:marshalled"/> </route> <route> <from uri="direct:marshalled"/> <unmarshal ref="myJaxb"/> <to uri="mock:result"/> </route> </camelContext> Ignoring the NonXML Character JaxbDataFromat supports to ignore the NonXML Character, you just need to set the filterNonXmlChars property to be true, JaxbDataFromat will replace the NonXML character with " " when it is marshaling or unmarshaling the message. You can also do it by setting the Exchange property Exchange.FILTER_NON_XML_CHARS. Working with the ObjectFactory If you use XJC to create the java class from the schema, you will get an ObjectFactory for you JAXB context. Since the ObjectFactory uses JAXBElement to hold the reference of the schema and element instance value, from Camel 1.5.1 jaxbDataformat will ignore the JAXBElement by default and you will get the element instance value instead of the JAXBElement object form the unmarshaled message body. If you want to get the JAXBElement object form the unmarshaled message body, you need to set the JaxbDataFormat object's ignoreJAXBElement property to be false. Setting encoding In Camel 1.6.1 and newer you can set the encoding option to use when marshalling. Its the Marshaller.JAXB_ENCODING encoding property on the JAXB Marshaller. You can setup which encoding to use when you declare the JAXB data format. You can also provide the encoding in the Exchange property Exchange.CHARSET_NAME. This property will overrule the encoding set on the JAXB data format. In this Spring DSL we have defined to use iso-8859-1 as the encoding: <camelContext id="camel" xmlns="http://camel.apache.org/schema/spring"> <route> <from uri="direct:start"/> <marshal> <jaxb prettyPrint="false" encoding="iso-8859-1" contextPath="org.apache.camel.example"/> </marshal> <to uri="mock:result"/> </route> </camelContext> Dependencies To use JAXB in your camel routes you need to add the a dependency on camel-jaxb which implements this data format. If you use maven you could just add the following to your pom.xml, substituting the version number for the latest & greatest release (see the download page for the latest versions). <dependency> <groupId>org.apache.camel</groupId> <artifactId>camel-jaxb</artifactId> <version>1.6.0</version> </dependency> Change Notification Preferences View Online | View Change | Add Comment