Examples with Matcher org.apache.tika.sax.xpath.Matcher used on opensource projects

Example 1 with Matcher

use of org.apache.tika.sax.xpath.Matcher in project lucene-solr by apache.

the class ExtractingDocumentLoader method load.

@Override
public void load(SolrQueryRequest req, SolrQueryResponse rsp, ContentStream stream, UpdateRequestProcessor processor) throws Exception {
    Parser parser = null;
    String streamType = req.getParams().get(ExtractingParams.STREAM_TYPE, null);
    if (streamType != null) {
        //Cache?  Parsers are lightweight to construct and thread-safe, so I'm told
        MediaType mt = MediaType.parse(streamType.trim().toLowerCase(Locale.ROOT));
        parser = new DefaultParser(config.getMediaTypeRegistry()).getParsers().get(mt);
    } else {
        parser = autoDetectParser;
    }
    if (parser != null) {
        Metadata metadata = new Metadata();
        // If you specify the resource name (the filename, roughly) with this parameter,
        // then Tika can make use of it in guessing the appropriate MIME type:
        String resourceName = req.getParams().get(ExtractingParams.RESOURCE_NAME, null);
        if (resourceName != null) {
            metadata.add(TikaMetadataKeys.RESOURCE_NAME_KEY, resourceName);
        }
        // Provide stream's content type as hint for auto detection
        if (stream.getContentType() != null) {
            metadata.add(HttpHeaders.CONTENT_TYPE, stream.getContentType());
        }
        InputStream inputStream = null;
        try {
            inputStream = stream.getStream();
            metadata.add(ExtractingMetadataConstants.STREAM_NAME, stream.getName());
            metadata.add(ExtractingMetadataConstants.STREAM_SOURCE_INFO, stream.getSourceInfo());
            metadata.add(ExtractingMetadataConstants.STREAM_SIZE, String.valueOf(stream.getSize()));
            metadata.add(ExtractingMetadataConstants.STREAM_CONTENT_TYPE, stream.getContentType());
            // HtmlParser and TXTParser regard Metadata.CONTENT_ENCODING in metadata
            String charset = ContentStreamBase.getCharsetFromContentType(stream.getContentType());
            if (charset != null) {
                metadata.add(HttpHeaders.CONTENT_ENCODING, charset);
            }
            String xpathExpr = params.get(ExtractingParams.XPATH_EXPRESSION);
            boolean extractOnly = params.getBool(ExtractingParams.EXTRACT_ONLY, false);
            SolrContentHandler handler = factory.createSolrContentHandler(metadata, params, req.getSchema());
            ContentHandler parsingHandler = handler;
            StringWriter writer = null;
            BaseMarkupSerializer serializer = null;
            if (extractOnly == true) {
                String extractFormat = params.get(ExtractingParams.EXTRACT_FORMAT, "xml");
                writer = new StringWriter();
                if (extractFormat.equals(TEXT_FORMAT)) {
                    serializer = new TextSerializer();
                    serializer.setOutputCharStream(writer);
                    serializer.setOutputFormat(new OutputFormat("Text", "UTF-8", true));
                } else {
                    serializer = new XMLSerializer(writer, new OutputFormat("XML", "UTF-8", true));
                }
                if (xpathExpr != null) {
                    Matcher matcher = PARSER.parse(xpathExpr);
                    //The MatchingContentHandler does not invoke startDocument.  See http://tika.markmail.org/message/kknu3hw7argwiqin
                    serializer.startDocument();
                    parsingHandler = new MatchingContentHandler(serializer, matcher);
                } else {
                    parsingHandler = serializer;
                }
            } else if (xpathExpr != null) {
                Matcher matcher = PARSER.parse(xpathExpr);
                parsingHandler = new MatchingContentHandler(handler, matcher);
            }
            try {
                //potentially use a wrapper handler for parsing, but we still need the SolrContentHandler for getting the document.
                ParseContext context = parseContextConfig.create();
                context.set(Parser.class, parser);
                context.set(HtmlMapper.class, MostlyPassthroughHtmlMapper.INSTANCE);
                // Password handling
                RegexRulesPasswordProvider epp = new RegexRulesPasswordProvider();
                String pwMapFile = params.get(ExtractingParams.PASSWORD_MAP_FILE);
                if (pwMapFile != null && pwMapFile.length() > 0) {
                    InputStream is = req.getCore().getResourceLoader().openResource(pwMapFile);
                    if (is != null) {
                        log.debug("Password file supplied: " + pwMapFile);
                        epp.parse(is);
                    }
                }
                context.set(PasswordProvider.class, epp);
                String resourcePassword = params.get(ExtractingParams.RESOURCE_PASSWORD);
                if (resourcePassword != null) {
                    epp.setExplicitPassword(resourcePassword);
                    log.debug("Literal password supplied for file " + resourceName);
                }
                parser.parse(inputStream, parsingHandler, metadata, context);
            } catch (TikaException e) {
                if (ignoreTikaException)
                    log.warn(new StringBuilder("skip extracting text due to ").append(e.getLocalizedMessage()).append(". metadata=").append(metadata.toString()).toString());
                else
                    throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, e);
            }
            if (extractOnly == false) {
                addDoc(handler);
            } else {
                //serializer is not null, so we need to call endDoc on it if using xpath
                if (xpathExpr != null) {
                    serializer.endDocument();
                }
                rsp.add(stream.getName(), writer.toString());
                writer.close();
                String[] names = metadata.names();
                NamedList metadataNL = new NamedList();
                for (int i = 0; i < names.length; i++) {
                    String[] vals = metadata.getValues(names[i]);
                    metadataNL.add(names[i], vals);
                }
                rsp.add(stream.getName() + "_metadata", metadataNL);
            }
        } catch (SAXException e) {
            throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, e);
        } finally {
            IOUtils.closeQuietly(inputStream);
        }
    } else {
        throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "Stream type of " + streamType + " didn't match any known parsers.  Please supply the " + ExtractingParams.STREAM_TYPE + " parameter.");
    }
}

Example 2 with Matcher

use of org.apache.tika.sax.xpath.Matcher in project tika by apache.

the class OpenDocumentMetaParser method getStatistic.

private static ContentHandler getStatistic(ContentHandler ch, Metadata md, Property property, String attribute) {
    Matcher matcher = META_XPATH.parse("//meta:document-statistic/@meta:" + attribute);
    ContentHandler branch = new MatchingContentHandler(new AttributeMetadataHandler(META_NS, attribute, md, property), matcher);
    return new TeeContentHandler(ch, branch);
}

Example 3 with Matcher

use of org.apache.tika.sax.xpath.Matcher in project tika by apache.

the class OpenDocumentMetaParser method getMeta.

private static ContentHandler getMeta(ContentHandler ch, Metadata md, Property property, String element) {
    Matcher matcher = new CompositeMatcher(META_XPATH.parse("//meta:" + element), META_XPATH.parse("//meta:" + element + "//text()"));
    ContentHandler branch = new MatchingContentHandler(new MetadataHandler(md, property), matcher);
    return new TeeContentHandler(ch, branch);
}

Example 4 with Matcher

use of org.apache.tika.sax.xpath.Matcher in project tika by apache.

the class OpenDocumentMetaParser method getStatistic.

@Deprecated
private static ContentHandler getStatistic(ContentHandler ch, Metadata md, String name, String attribute) {
    Matcher matcher = META_XPATH.parse("//meta:document-statistic/@meta:" + attribute);
    ContentHandler branch = new MatchingContentHandler(new AttributeMetadataHandler(META_NS, attribute, md, name), matcher);
    return new TeeContentHandler(ch, branch);
}

Example 5 with Matcher

use of org.apache.tika.sax.xpath.Matcher in project tika by apache.

the class OpenDocumentMetaParser method getUserDefined.

private static ContentHandler getUserDefined(ContentHandler ch, Metadata md) {
    Matcher matcher = new CompositeMatcher(META_XPATH.parse("//meta:user-defined/@meta:name"), META_XPATH.parse("//meta:user-defined//text()"));
    // eg <meta:user-defined meta:name="Info1">Text1</meta:user-defined> becomes custom:Info1=Text1
    ContentHandler branch = new MatchingContentHandler(new AttributeDependantMetadataHandler(md, "meta:name", Metadata.USER_DEFINED_METADATA_NAME_PREFIX), matcher);
    return new TeeContentHandler(ch, branch);
}