[jira] [Created] (TIKA-1904) Tika 2.0 - Create Proxy Parser and Detectors

["Bob Paulin (JIRA)" <ji...@apache.org>]

Bob Paulin created TIKA-1904:
--------------------------------

             Summary: Tika 2.0 - Create Proxy Parser and Detectors
                 Key: TIKA-1904
                 URL: https://issues.apache.org/jira/browse/TIKA-1904
             Project: Tika
          Issue Type: Improvement
    Affects Versions: 2.0
            Reporter: Bob Paulin
            Assignee: Bob Paulin


There are several parsers and detectors that instantiate parsers and detectors that live in different modules in tika 2.0.  As of now these modules have are dependent on other modules this includes:
tika-parser-office-module -> tika-parser-web-module, tika-parser-text-module, tika-parser-package-module
tika-parser-ebook-module -> tika-parser-text-module
tika-parser-journal-module -> tika-parser-pdf-module

May of these dependencies could be made optional by introducing the concept of proxy parser and detectors that would enable functionality if all the dependencies are included in the project but not throw a ClassNotFoundException if the dependent module was not include( ex. parse function would do nothing).

EX
Currently
ChmParser
{code}
private void parsePage(byte[] byteObject, ContentHandler xhtml) throws TikaException {// throws IOException
        InputStream stream = null;
        Metadata metadata = new Metadata();
        HtmlParser htmlParser = new HtmlParser();
        ContentHandler handler = new EmbeddedContentHandler(new BodyContentHandler(xhtml));// -1
        ParseContext parser = new ParseContext();
        try {
            stream = new ByteArrayInputStream(byteObject);
            htmlParser.parse(stream, handler, metadata, parser);
        } catch (SAXException e) {
            throw new RuntimeException(e);
        } catch (IOException e) {
            // Pushback overflow from tagsoup
        }
    }
{code}

Instead the HtmlParser could be Proxyed in the constructor
{code}
private final Parser htmlProxyParser;
    
    public ChmParser() {
        this.htmlProxyParser = new ProxyParser("org.apache.tika.parser.html.HtmlParser");
    }
{code}

And 

{code}

private void parsePage(byte[] byteObject, ContentHandler xhtml) throws TikaException {// throws IOException
        InputStream stream = null;
        Metadata metadata = new Metadata();
        ContentHandler handler = new EmbeddedContentHandler(new BodyContentHandler(xhtml));// -1
        ParseContext parser = new ParseContext();
        try {
            stream = new ByteArrayInputStream(byteObject);
            htmlProxyParser.parse(stream, handler, metadata, parser);
        } catch (SAXException e) {
            throw new RuntimeException(e);
        } catch (IOException e) {
            // Pushback overflow from tagsoup
        }
    }
{code}





--
This message was sent by Atlassian JIRA
(v6.3.4#6332)