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    <p>you need to use an <a href="http://java.sun.com/javase/6/docs/jre/api/plugin/dom/org/w3c/dom/ls/LSResourceResolver.html" rel="noreferrer">LSResourceResolver</a> for this to work. please take a look at the sample code below.</p> <p>a validate method:</p> <pre><code>// note that if your XML already declares the XSD to which it has to conform, then there's no need to declare the schemaName here void validate(String xml, String schemaName) throws Exception { DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance(); builderFactory.setNamespaceAware(true); DocumentBuilder parser = builderFactory .newDocumentBuilder(); // parse the XML into a document object Document document = parser.parse(new StringInputStream(xml)); SchemaFactory factory = SchemaFactory .newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI); // associate the schema factory with the resource resolver, which is responsible for resolving the imported XSD's factory.setResourceResolver(new ResourceResolver()); // note that if your XML already declares the XSD to which it has to conform, then there's no need to create a validator from a Schema object Source schemaFile = new StreamSource(getClass().getClassLoader() .getResourceAsStream(schemaName)); Schema schema = factory.newSchema(schemaFile); Validator validator = schema.newValidator(); validator.validate(new DOMSource(document)); } </code></pre> <p>the resource resolver implementation:</p> <pre><code>public class ResourceResolver implements LSResourceResolver { public LSInput resolveResource(String type, String namespaceURI, String publicId, String systemId, String baseURI) { // note: in this sample, the XSD's are expected to be in the root of the classpath InputStream resourceAsStream = this.getClass().getClassLoader() .getResourceAsStream(systemId); return new Input(publicId, systemId, resourceAsStream); } } </code></pre> <p>The Input implemetation returned by the resource resolver:</p> <pre><code>public class Input implements LSInput { private String publicId; private String systemId; public String getPublicId() { return publicId; } public void setPublicId(String publicId) { this.publicId = publicId; } public String getBaseURI() { return null; } public InputStream getByteStream() { return null; } public boolean getCertifiedText() { return false; } public Reader getCharacterStream() { return null; } public String getEncoding() { return null; } public String getStringData() { synchronized (inputStream) { try { byte[] input = new byte[inputStream.available()]; inputStream.read(input); String contents = new String(input); return contents; } catch (IOException e) { e.printStackTrace(); System.out.println("Exception " + e); return null; } } } public void setBaseURI(String baseURI) { } public void setByteStream(InputStream byteStream) { } public void setCertifiedText(boolean certifiedText) { } public void setCharacterStream(Reader characterStream) { } public void setEncoding(String encoding) { } public void setStringData(String stringData) { } public String getSystemId() { return systemId; } public void setSystemId(String systemId) { this.systemId = systemId; } public BufferedInputStream getInputStream() { return inputStream; } public void setInputStream(BufferedInputStream inputStream) { this.inputStream = inputStream; } private BufferedInputStream inputStream; public Input(String publicId, String sysId, InputStream input) { this.publicId = publicId; this.systemId = sysId; this.inputStream = new BufferedInputStream(input); } } </code></pre>
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    1. POHow to validate an XML file using Java with an XSD having an include?
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    1. USStefan De Boey
    1. USStefan De Boey
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    1. POHow to validate an XML file using Java with an XSD having an include?
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    1. COThanks a lot for this comprehensive answer! I'll implement that this afternoon and let you know how it worked. I do need to create the Schema object since I have no idea how the file that are going to be validated will be built. I don't want to rely on their declaration.
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      1. USMelanie
    2. COno prob, the sample code is taken from a unit test, so you'll probably need to change some bits to suit your needs
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    3. COI'm almost there. Now my the validator does include the included file and the content of the main file. But I have an exception when loading an import file, content not allowed in prolog... It's with a file that is imported. If I load that file directly (build the schema from it instead of the main), I don't get this error. Any idea what can cause this kind of exception in that condition?
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