Unmarshalling JAXB entities from SOAP wrappers

Extracting JAXB entities from inside SOAP wrappers can be done without string-chopping using standard APIs.

Example: using standard API.

String example =
        "<soapenv:Envelope xmlns:soapenv=\"http://schemas.xmlsoap.org/soap/envelope/\"><soapenv:Header /><soapenv:Body><ns2:farm xmlns:ns2=\"http://adamish.com/example/farm\"><horse height=\"123\" name=\"glue factory\"/></ns2:farm></soapenv:Body></soapenv:Envelope>";

SOAPMessage message = MessageFactory.newInstance().createMessage(null,
        new ByteArrayInputStream(example.getBytes()));

Unmarshaller unmarshaller = JAXBContext.newInstance(Farm.class).createUnmarshaller();
Farm farm = (Farm)unmarshaller.unmarshal(message.getSOAPBody().extractContentAsDocument());

Anti-example seen in the wild: string chopping / regex

String example =
        "<soapenv:Envelope xmlns:soapenv=\"http://schemas.xmlsoap.org/soap/envelope/\"><soapenv:Header /><soapenv:Body><ns2:farm xmlns:ns2=\"http://adamish.com/example/farm\"><horse height=\"123\" name=\"glue factory\"/></ns2:farm></soapenv:Body></soapenv:Envelope>";

int start = example.indexOf("Body>") + 5;
Matcher m = Pattern.compile("</[^>]*Body").matcher(example);
m.find();
int end = m.start();
String output = example.substring(start, end);

Unmarshaller unmarshaller = JAXBContext.newInstance(Farm.class).createUnmarshaller();
Farm farm = (Farm) unmarshaller.unmarshal(new ByteArrayInputStream(output.getBytes()));