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

      String outputType = null;
      String media = null;
      Vector params = new Vector();
      boolean quietConflictWarnings = false;
      URIResolver uriResolver = null;
      EntityResolver entityResolver = null;
      ContentHandler contentHandler = null;
      int recursionLimit=-1;


      for (int i = 0; i < argv.length; i++)
      {

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     * is created to service all needs.
     */
    private static class NopConfigFactory extends ConfigFactory {


        public EntityResolver createRepositoryEntityResolver() {
            return new EntityResolver() {


                // return null as we will not resolve this. Null is a valid response
                public InputSource resolveEntity(
                        String publicId, String systemId)
                        throws SAXException, IOException {

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               return source;
            }
         }


         // first try to resolve using user's entity resolver
         EntityResolver resolver = fEntityHandler.getEntityResolver();
         if (resolver != null) {
            InputSource source = resolver.resolveEntity(publicId, systemId);
            if (source != null) {
               return source;
            }
         }

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        /**
         * If we cannot find the DTD or xsd then ignore it and carry on
         */


        builder.setEntityResolver(new EntityResolver() {
          public InputSource resolveEntity(String publicId, String systemId) {
            InputSource src = new InputSource(systemId);
            try {
              InputStream r = src.getByteStream();
              if (r != null) {

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      String outputType = null;
      String media = null;
      Vector params = new Vector();
      boolean quietConflictWarnings = false;
      URIResolver uriResolver = null;
      EntityResolver entityResolver = null;
      ContentHandler contentHandler = null;
      int recursionLimit=-1;


      for (int i = 0; i < argv.length; i++)
      {

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    protected Document parseXml(InputStream source) throws Exception
    {
        // Parse using the local dtds instead of remote dtds. This
        // allows to deploy the application offline
        SAXBuilder saxBuilder = new SAXBuilder();
        saxBuilder.setEntityResolver(new EntityResolver()
        {
            public InputSource resolveEntity(java.lang.String publicId, java.lang.String systemId) throws SAXException,
                            java.io.IOException
            {
                if (systemId.equals("http://java.sun.com/dtd/web-app_2_3.dtd"))

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        try
        {
            // Use the local dtd instead of remote dtd. This
            // allows to deploy the application offline
            builder.setEntityResolver(new EntityResolver()
            {
                public InputSource resolveEntity( java.lang.String publicId, java.lang.String systemId )
                        throws SAXException, java.io.IOException
                {

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            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            factory.setAttribute(VALIDATION_FEATURE_ID, Boolean.TRUE);
            factory.setAttribute(SCHEMA_VALIDATION_FEATURE_ID, Boolean.TRUE);
            factory.setNamespaceAware(true);
            DocumentBuilder docBuilder = factory.newDocumentBuilder();
            docBuilder.setEntityResolver(new EntityResolver() {
                public InputSource resolveEntity(String publicId, String systemId) throws IOException {
                    return new InputSource(getSchemaFile().getInputStream());
                }
            });
            Document doc = docBuilder.parse(inputSource);

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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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            domFactory.setNamespaceAware(true);
        }
        DocumentBuilder builder = domFactory.newDocumentBuilder();


        
        builder.setEntityResolver(new EntityResolver()
        {
            public InputSource resolveEntity(java.lang.String publicId, java.lang.String systemId) throws SAXException,
                            java.io.IOException
            {
                if (systemId.equals("http://java.sun.com/dtd/web-app_2_3.dtd"))

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