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Ultra-high performance non-blocking XML processor (Stax/Stax2, SAX/SAX2)

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package test;

import java.io.*;
import java.util.List;

import javax.xml.stream.*;

import org.codehaus.stax2.LocationInfo;
import org.codehaus.stax2.XMLInputFactory2;
import org.codehaus.stax2.XMLStreamReader2;
// import org.codehaus.stax2.io.Stax2ByteArraySource;

/**
 * Simple helper test class for checking how stream reader handles xml
 * documents.
 */
public class TestStreamReader
    implements XMLStreamConstants
{
    protected TestStreamReader() {
    }

    protected XMLInputFactory getFactory()
    {
        System.setProperty("javax.xml.stream.XMLInputFactory",
                           "com.fasterxml.aalto.stax.InputFactoryImpl");

        XMLInputFactory f = XMLInputFactory.newInstance();
        System.out.println("Factory instance: "+f.getClass());

        //f.setProperty(XMLInputFactory.IS_COALESCING, Boolean.FALSE);
        f.setProperty(XMLInputFactory.IS_COALESCING, Boolean.TRUE);
        f.setProperty(XMLInputFactory.IS_NAMESPACE_AWARE, Boolean.TRUE);
        //f.setProperty(XMLInputFactory.IS_NAMESPACE_AWARE, Boolean.FALSE);
        f.setProperty(XMLInputFactory.IS_REPLACING_ENTITY_REFERENCES,
                      Boolean.FALSE
                      //Boolean.TRUE
                      );

        f.setProperty(XMLInputFactory.SUPPORT_DTD, Boolean.TRUE);
        //f.setProperty(XMLInputFactory.SUPPORT_DTD, Boolean.FALSE);

        f.setProperty(XMLInputFactory.IS_VALIDATING, Boolean.FALSE);
        //f.setProperty(XMLInputFactory.IS_VALIDATING, Boolean.TRUE);

        return f;
    }

    @SuppressWarnings({ "unchecked", "resource" })
	protected int test(File file)
        throws Exception
    {
        XMLInputFactory f = getFactory();

        System.out.print("Coalesce: "+f.getProperty(XMLInputFactory.IS_COALESCING));
        System.out.println(", NS-aware: "+f.getProperty(XMLInputFactory.IS_NAMESPACE_AWARE));
        System.out.print("Entity-expanding: "+f.getProperty(XMLInputFactory.IS_REPLACING_ENTITY_REFERENCES));
        System.out.println(", validating: "+f.getProperty(XMLInputFactory.IS_VALIDATING));
        //System.out.println(", name interning: "+f.getProperty(XMLInputFactory2.P_INTERN_NAMES));
        int total = 0;

        XMLStreamReader2 sr;

        // Let's deal with gzipped files too?
        /*
        if (file.getName().endsWith(".gz")) {
            System.out.println("[gzipped input file!]");
            sr = f.createXMLStreamReader
                (new InputStreamReader(new GZIPInputStream
                                       (new FileInputStream(file)), "UTF-8"));
        } else {
            sr = f.createXMLStreamReader(new FileInputStream(file));
            //sr = f.createXMLStreamReader(new FileReader(file));
        }
        */

        /*
        {
            byte[] data = readData(file);
            sr = f.createXMLStreamReader(new Stax2ByteArraySource(data, 0, data.length));
            System.out.println("File '"+file+"', read "+data.length+" bytes in.");
        }
        */

        sr = (XMLStreamReader2) f.createXMLStreamReader(new InputStreamReader(new FileInputStream(file), "UTF-8"));
        //sr = f.createXMLStreamReader(new FileInputStream(file));

        System.out.println("SR; name interning: "+sr.getProperty(XMLInputFactory2.P_INTERN_NAMES));
        System.out.println("SR; URI interning: "+sr.getProperty(XMLInputFactory2.P_INTERN_NS_URIS));

        int type = sr.getEventType();

        System.out.println("START: version = '"+sr.getVersion()
                           +"', xml-encoding = '"+sr.getCharacterEncodingScheme()
                           +"', input encoding = '"+sr.getEncoding()+"'");


        while (type != END_DOCUMENT) {
            type = sr.next();
            total += type; // so it won't be optimized out...

            //boolean hasName = sr.hasName();

            System.out.print("["+type+"]");

            if (sr.hasText()) {
                String text = sr.getText();
                total += text.length(); // to prevent dead code elimination
                if (type == CHARACTERS || type == CDATA || type == COMMENT) {
                    System.out.println(" Text("+text.length()+" = '"+text+"'.");
                    if (text.length() >= 1) {
                        System.out.println(" [first char code: 0x"+Integer.toHexString(text.charAt(0))+"]");
                    }

                    LocationInfo li = sr.getLocationInfo();
                    System.out.println(" [Loc, start: "+li.getStartLocation()+", end: "+li.getEndLocation()+"]");

                } else if (type == SPACE) {
                    System.out.print(" Ws = '"+text+"'.");
                    char c = (text.length() == 0) ? ' ': text.charAt(text.length()-1);
                    if (c != '\r' && c != '\n') {
                        System.out.println();
                    }
                } else if (type == DTD) {
                    System.out.println(" DTD;");
                    List entities = (List) sr.getProperty("javax.xml.stream.entities");
                    List notations = (List) sr.getProperty("javax.xml.stream.notations");
                    int entCount = (entities == null) ? -1 : entities.size();
                    int notCount = (notations == null) ? -1 : notations.size();
                    System.out.print("  ("+entCount+" entities, "+notCount
                                       +" notations), sysid ");
                    System.out.print(", declaration = <<");
                    System.out.print(text);
                    System.out.println(">>");
                } else if (type == ENTITY_REFERENCE) {
                    // entity ref
                    System.out.println(" Entity ref: &"+sr.getLocalName()+" -> '"+sr.getText()+"'.");
                    //hasName = false; // to suppress further output
                } else { // PI?
                    ;
                }
            }

            if (type == PROCESSING_INSTRUCTION) {
                System.out.println(" PI target = '"+sr.getPITarget()+"'.");
                System.out.println(" PI data = '"+sr.getPIData()+"'.");
            } else if (type == START_ELEMENT) {
                String prefix = sr.getPrefix();
                System.out.print('<');
                if (prefix != null && prefix.length() > 0) {
                    System.out.print(prefix);
                    System.out.print(':');
                }
                System.out.print(sr.getLocalName());
                //System.out.println("[first char 0x"+Integer.toHexString(sr.getLocalName().charAt(0))+"]");

                System.out.print(" [QNameNS: "+sr.getName().getNamespaceURI()+"]");

                System.out.print(" {ns '");
                System.out.print(sr.getNamespaceURI());
                System.out.print("'}> ");
                int count = sr.getAttributeCount();
                int nsCount = sr.getNamespaceCount();
                System.out.println(" ["+nsCount+" ns, "+count+" attrs]");
                // debugging:
                for (int i = 0; i < nsCount; ++i) {
                    System.out.println(" ns#"+i+": '"+sr.getNamespacePrefix(i)
                                     +"' -> '"+sr.getNamespaceURI(i)
                                     +"'");
                }
                for (int i = 0; i < count; ++i) {
                    String val = sr.getAttributeValue(i);
                    System.out.print(" attr#"+i+": "+sr.getAttributePrefix(i)
                                     +":"+sr.getAttributeLocalName(i)
                                     +" ("+sr.getAttributeNamespace(i)
                                     +") -> '"+val
                                     +"' ["+(val.length())+"]");
                    System.out.println(sr.isAttributeSpecified(i) ?
                                       "[specified]" : "[Default]");
                }
            } else if (type == END_ELEMENT) {
                System.out.print(" 0) {
                    System.out.print(prefix);
                    System.out.print(':');
                }
                System.out.print(sr.getLocalName());
                System.out.print(" {ns '");
                System.out.print(sr.getNamespaceURI());
                System.out.print("'}> ");
                int nsCount = sr.getNamespaceCount();
                System.out.println(" ["+nsCount+" ns unbound]");
            } else if (type == START_DOCUMENT) { // only for multi-doc mode
                System.out.print("XML-DECL: version = '"+sr.getVersion()
                                 +"', xml-decl-encoding = '"+sr.getCharacterEncodingScheme()
                                 +"', app-encoding = '"+sr.getEncoding()
                                 +"', stand-alone set: "+sr.standaloneSet());
            }
        }
        return total;
    }

    public static void main(String[] args)
        throws Exception
    {
        if (args.length != 1) {
            System.err.println("Usage: java ... "+TestStreamReader.class+" [file]");
            System.exit(1);
        }

        try {
            int total = new TestStreamReader().test(new File(args[0]));
            System.out.println();
            System.out.println("Total: "+total);
        } catch (Throwable t) {
          System.err.println("Error: "+t);
          t.printStackTrace();
        }
    }
}
    

    

    
            
    
            







    
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