Examples of org.xml.sax.EntityResolver

org.xml.sax.EntityResolver
axproject.org'>http://www.saxproject.org for further information.
If a SAX application needs to implement customized handling for external entities, it must implement this interface and register an instance with the SAX driver using the {@link org.xml.sax.XMLReader#setEntityResolver setEntityResolver}method.

The XML reader will then allow the application to intercept any external entities (including the external DTD subset and external parameter entities, if any) before including them.

Many SAX applications will not need to implement this interface, but it will be especially useful for applications that build XML documents from databases or other specialised input sources, or for applications that use URI types other than URLs.

The following resolver would provide the application with a special character stream for the entity with the system identifier "http://www.myhost.com/today":
```
 import org.xml.sax.EntityResolver; import org.xml.sax.InputSource; public class MyResolver implements EntityResolver { public InputSource resolveEntity (String publicId, String systemId) { if (systemId.equals("http://www.myhost.com/today")) { // return a special input source MyReader reader = new MyReader(); return new InputSource(reader); } else { // use the default behaviour return null; } } } 
```
The application can also use this interface to redirect system identifiers to local URIs or to look up replacements in a catalog (possibly by using the public identifier).
@since SAX 1.0 @author David Megginson @version 2.0.1 (sax2r2) @see org.xml.sax.XMLReader#setEntityResolver @see org.xml.sax.InputSource


        // now format the XML
        ByteArrayInputStream bais = new ByteArrayInputStream(unformatted.toByteArray());
        DocumentBuilder docBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
        // BZ 536138 & 1038728, don't resolve the preferences DTD.
        docBuilder.setEntityResolver(new EntityResolver() {
            @Override
            public InputSource resolveEntity(String publicId, String systemId) throws SAXException, IOException {
                return new InputSource(new StringReader(""));
            }
        });

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            documentBuilderFactory.setFeature("http://xml.org/sax/features/validation", false);
            documentBuilderFactory.setFeature("http://apache.org/xml/features/nonvalidating/load-dtd-grammar", false);
            documentBuilderFactory.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);


            DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
            documentBuilder.setEntityResolver(new EntityResolver() {
                @Override
                public InputSource resolveEntity(String publicId, String systemId) throws SAXException, IOException {
                    return new InputSource(new StringReader(""));
                }
            });

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            documentBuilderFactory.setFeature("http://xml.org/sax/features/validation", false);
            documentBuilderFactory.setFeature("http://apache.org/xml/features/nonvalidating/load-dtd-grammar", false);
            documentBuilderFactory.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);


            DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
            documentBuilder.setEntityResolver(new EntityResolver() {
                @Override
                public InputSource resolveEntity(String publicId, String systemId) throws SAXException, IOException {
                    return new InputSource(new StringReader(""));
                }
            });

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            SAXParserFactory factory = SAXParserFactory.newInstance();
            SAXParser parser = factory.newSAXParser();


            XMLReader reader = parser.getXMLReader();


            EntityResolver entityResolver = SelectiveSkippingEntityResolver.getDtdAndXsdSkippingInstance();
            reader.setEntityResolver(entityResolver);


            JBossServiceHandler contentHandler = new JBossServiceHandler(serviceXmlFile);
            reader.setContentHandler(contentHandler);

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            SAXParserFactory factory = SAXParserFactory.newInstance();
            SAXParser parser = factory.newSAXParser();


            XMLReader reader = parser.getXMLReader();


            EntityResolver entityResolver = SelectiveSkippingEntityResolver.getDtdAndXsdSkippingInstance();
            reader.setEntityResolver(entityResolver);


            JBossServiceHandler contentHandler = new JBossServiceHandler(serviceXmlFile);
            reader.setContentHandler(contentHandler);

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            final InputSource empty = new InputSource(new EmptyReader());
            parser = Builder.findParser(false);
            // parser = new org.apache.crimson.parser.XMLReaderImpl();
            // Now let's stop this parser from loading any external
            // entities the subset references
            parser.setEntityResolver(new EntityResolver() {


                public InputSource resolveEntity(String publicID, String systemID) {
                    return empty;
                }

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            String inputString =
                    readAsString(streamSource.getInputStream());
            input = new StreamSource(new StringReader(inputString),
                    streamSource.getSystemId());


            EntityResolver resolver = ConfigFactory.getDefaultInstance().
                    createRepositoryEntityResolver();


            SAXTransformerFactory factory = (SAXTransformerFactory)
                    transformerMetaFactory.createTransformerFactory();
            Source xslSource = stylesheet;

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                public void fatalError(SAXParseException e) throws SAXException {
                    throw e;
                }
            });


            builder.setEntityResolver(new EntityResolver() {
                public InputSource resolveEntity(String publicId,
                        String systemId) throws SAXException, IOException {
                    if (systemId.equals(PROP_DTD_NAME)) {
                        InputSource result = new InputSource(new StringReader(PROP_DTD));
                        result.setSystemId(PROP_DTD_NAME);

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    public void testDOMLoad() throws Exception
    {
        URL location = ConfigurationAssert.getTestURL(TEST_PROPERTIES_FILE);
        DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
        DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
        dBuilder.setEntityResolver(new EntityResolver()
        {
            @Override
            public InputSource resolveEntity(String publicId, String systemId)
            {
                return new InputSource(getClass().getClassLoader()

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                public void fatalError(SAXParseException e) throws SAXException {
                    throw e;
                }
            });
            
            builder.setEntityResolver(new EntityResolver() {
                public InputSource resolveEntity(String publicId, String systemId)
                        throws SAXException, IOException {
                    if (systemId.equals(PROP_DTD_NAME)) {
                        InputSource result = new InputSource(new StringReader(
                                PROP_DTD));

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