Examples of nz.govt.natlib.fx.ParserContext

nz.govt.natlib.fx.ParserContext
ParserContext is a class that represents the context of a particular parsing operation. This 'context' is philosophically similiar a SAX based parser. A file being parsed is typically represented by a number of nested 'sections': [[header][data|config|text][data header[blocks][offset]][block 1][block 2][block n]] the above is just an example but you can see that when a file like this is being parsed a number of 'events' can occur. 1. the header is read some data is read from the header and the section ends 2. the next section is read i.e. data, config or text and an event occurs, and the section ends 3. the data header is read 3a. the number of blocks is read 3b. the offset of the blocks is read 4. the data header section ends 5. each block is read... Firing events for every section and associated data allows a parser to continue on without leaking memory by building up an object model. Output listeners can stream the information out in any format as the input file is parsed. (XML for instance) @author Nic Evans @version 1.0

    
    //holder for the transformed adapter output
    //ByteArrayOutputStream tAdapterOutput = new ByteArrayOutputStream(2048);
    
    // Set up the parser context and listener to hold the adapter output
    ParserContext pContext = new ParserContext();
    
    ParserListener listener= new DTDXmlParserListener(adapterOutput, outDTD == null ? null
        : Config.getInstance().getXMLBaseURL() + "/" + outDTD);
    pContext.addListener(listener);
    
    // Attempt to harvest the metadata.
    try {        
      // Extract the metadata.
      adapter.adapt(file, pContext);

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    DataAdapter adapter = AdapterFactory.getInstance().getAdapter(file);


    // adapt each file...
    String outDTD = adapter.getOutputType();
    ByteArrayOutputStream bout = new ByteArrayOutputStream(2048);
    ParserContext handler = new ParserContext();


    // fill in some details - to be included in the output...
    handler.setAttribute(ParserContext.FILE_INDEX, fileCount++);
    handler.setAttribute(ParserContext.OBJECT, props
        .getProperty("ID", null));
    handler.setAttribute(ParserContext.PROCESS, props.getProperty("Type",
        null));


    // Set up the handler.
    ParserListener listener = new DTDXmlParserListener(bout, outDTD == null ? null
        : Config.getInstance().getXMLBaseURL() + "/" + outDTD);
    handler.addListener(listener);


    // Adapt the file.
    LogManager.getInstance().logMessage(LogMessage.WORTHLESS_CHATTER, "Starting Adapter");
    adapter.adapt(file, handler);
    LogManager.getInstance().logMessage(LogMessage.WORTHLESS_CHATTER, "Finished adapting");

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        //TransformProcessor.getInstance(
        //  inDTD, outDTD);
      


      ByteArrayOutputStream bout = new ByteArrayOutputStream(2048);
      ParserContext handler = new ParserContext();
      ParserListener listener = new DTDXmlParserListener(bout,
          outDTD == null ? null : Config.getInstance()
              .getXMLBaseURL()
              + "/" + outDTD);
      handler.addListener(listener);
      adapter.adapt(file, handler);


      transformer.transform(new ByteArrayInputStream(bout.toByteArray()),
          out);
    } finally {

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    File f = new File(args[0]);


    // Create a ParserContext to listen for Metadata 
    // events. We are using a custom listener to extend the 
    // behaviour of the standard ones.
    ParserContext ctx = new ParserContext();
    StringBufferXMLParserListener listener = new StringBufferXMLParserListener("bmp.dtd");
    ctx.addListener(listener);
    
    // Attempt to harvest the metadata.
    try {
      // Make sure the Harvester System is initialised.
      Config.getInstance();

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edu.harvard.hul.ois.fits.tools.nlnz.MetadataExtractor

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