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1564795
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2009-10-14T07:36:04.927
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2017-09-08T09:37:07.057
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2017-09-08T09:37:07.057
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2
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70
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text
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Firstly, <code>javax.xml.bind.Validator</code> has been deprecated in favour of <code>javax.xml.validation.Schema</code> (<a href="https://docs.oracle.com/javase/7/docs/api/javax/xml/validation/Schema.html" rel="noreferrer">javadoc</a>). The idea is that you parse your schema via a <code>javax.xml.validation.SchemaFactory</code> (<a href="https://docs.oracle.com/javase/7/docs/api/javax/xml/validation/SchemaFactory.html" rel="noreferrer">javadoc</a>), and inject that into the marshaller/unmarshaller. As for your question regarding validation without marshalling, the problem here is that JAXB actually delegates the validation to Xerces (or whichever SAX processor you're using), and Xerces validates your document as a stream of SAX events. So in order to validate, you need to perform some kind of marshalling. The lowest-impact implementation of this would be to use a "/dev/null" implementation of a SAX processor. Marshalling to a null OutputStream would still involve XML generation, which is wasteful. So I would suggest: <pre><code>SchemaFactory schemaFactory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI); Schema schema = schemaFactory.newSchema(locationOfMySchema); Marshaller marshaller = jaxbContext.createMarshaller(); marshaller.setSchema(schema); marshaller.marshal(objectToMarshal, new DefaultHandler()); </code></pre> <code>DefaultHandler</code> will discard all the events, and the <code>marshal()</code> operation will throw a JAXBException if validation against the schema fails.
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1. POHow to validate against schema in JAXB 2.0 without marshalling?
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1. USDavid Tonhofer
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1. USskaffman
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