Examples with UncloseableInputStream org.eclipse.rdf4j.common.io.UncloseableInputStream used on opensource projects

Example 1 with UncloseableInputStream

use of org.eclipse.rdf4j.common.io.UncloseableInputStream in project rdf4j by eclipse.

the class AbstractSPARQLXMLParser method parseQueryResultInternal.

protected boolean parseQueryResultInternal(InputStream in, boolean attemptParseBoolean, boolean attemptParseTuple) throws IOException, QueryResultParseException, QueryResultHandlerException {
    if (!attemptParseBoolean && !attemptParseTuple) {
        throw new IllegalArgumentException("Internal error: Did not specify whether to parse as either boolean and/or tuple");
    }
    BufferedInputStream buff = new BufferedInputStream(in);
    // Wrap in a custom InputStream that doesn't allow close to be called by dependencies before we are ready to call it
    UncloseableInputStream uncloseable = new UncloseableInputStream(buff);
    SAXException caughtException = null;
    boolean result = false;
    try {
        if (attemptParseBoolean) {
            buff.mark(Integer.MAX_VALUE);
            try {
                SPARQLBooleanSAXParser valueParser = new SPARQLBooleanSAXParser();
                XMLReader xmlReader;
                if (getParserConfig().isSet(XMLParserSettings.CUSTOM_XML_READER)) {
                    xmlReader = getParserConfig().get(XMLParserSettings.CUSTOM_XML_READER);
                } else {
                    xmlReader = XMLReaderFactory.createXMLReader();
                }
                xmlReader.setErrorHandler(this);
                // not explicitly set
                for (RioSetting<Boolean> aSetting : getCompulsoryXmlFeatureSettings()) {
                    try {
                        xmlReader.setFeature(aSetting.getKey(), getParserConfig().get(aSetting));
                    } catch (SAXNotRecognizedException e) {
                        reportWarning(String.format("%s is not a recognized SAX feature.", aSetting.getKey()));
                    } catch (SAXNotSupportedException e) {
                        reportWarning(String.format("%s is not a supported SAX feature.", aSetting.getKey()));
                    }
                }
                // not explicitly set
                for (RioSetting<?> aSetting : getCompulsoryXmlPropertySettings()) {
                    try {
                        xmlReader.setProperty(aSetting.getKey(), getParserConfig().get(aSetting));
                    } catch (SAXNotRecognizedException e) {
                        reportWarning(String.format("%s is not a recognized SAX property.", aSetting.getKey()));
                    } catch (SAXNotSupportedException e) {
                        reportWarning(String.format("%s is not a supported SAX property.", aSetting.getKey()));
                    }
                }
                // the parser config
                for (RioSetting<Boolean> aSetting : getOptionalXmlFeatureSettings()) {
                    try {
                        if (getParserConfig().isSet(aSetting)) {
                            xmlReader.setFeature(aSetting.getKey(), getParserConfig().get(aSetting));
                        }
                    } catch (SAXNotRecognizedException e) {
                        reportWarning(String.format("%s is not a recognized SAX feature.", aSetting.getKey()));
                    } catch (SAXNotSupportedException e) {
                        reportWarning(String.format("%s is not a supported SAX feature.", aSetting.getKey()));
                    }
                }
                // the parser config
                for (RioSetting<?> aSetting : getOptionalXmlPropertySettings()) {
                    try {
                        if (getParserConfig().isSet(aSetting)) {
                            xmlReader.setProperty(aSetting.getKey(), getParserConfig().get(aSetting));
                        }
                    } catch (SAXNotRecognizedException e) {
                        reportWarning(String.format("%s is not a recognized SAX property.", aSetting.getKey()));
                    } catch (SAXNotSupportedException e) {
                        reportWarning(String.format("%s is not a supported SAX property.", aSetting.getKey()));
                    }
                }
                internalSAXParser = new SimpleSAXParser(xmlReader);
                internalSAXParser.setPreserveWhitespace(true);
                internalSAXParser.setListener(valueParser);
                internalSAXParser.parse(uncloseable);
                result = valueParser.getValue();
                try {
                    if (this.handler != null) {
                        this.handler.handleBoolean(result);
                    }
                } catch (QueryResultHandlerException e) {
                    if (e.getCause() != null && e.getCause() instanceof IOException) {
                        throw (IOException) e.getCause();
                    } else {
                        throw new QueryResultParseException("Found an issue with the query result handler", e);
                    }
                }
                // result;
                return result;
            } catch (SAXException e) {
                caughtException = e;
            }
            // Reset the buffered input stream and try again looking for tuple
            // results
            buff.reset();
        }
        if (attemptParseTuple) {
            try {
                XMLReader xmlReader = XMLReaderFactory.createXMLReader();
                xmlReader.setErrorHandler(this);
                internalSAXParser = new SimpleSAXParser(xmlReader);
                internalSAXParser.setPreserveWhitespace(true);
                internalSAXParser.setListener(new SPARQLResultsSAXParser(this.valueFactory, this.handler));
                internalSAXParser.parse(uncloseable);
                // we had success, so remove the exception that we were tracking
                // from
                // the boolean failure
                caughtException = null;
            } catch (SAXException e) {
                caughtException = e;
            }
        }
        if (caughtException != null) {
            Exception wrappedExc = caughtException.getException();
            if (wrappedExc == null) {
                throw new QueryResultParseException(caughtException);
            } else if (wrappedExc instanceof QueryResultParseException) {
                throw (QueryResultParseException) wrappedExc;
            } else if (wrappedExc instanceof QueryResultHandlerException) {
                throw (QueryResultHandlerException) wrappedExc;
            } else {
                throw new QueryResultParseException(wrappedExc);
            }
        }
    } finally {
        // Explicitly call the delegator to the close method to actually close it
        uncloseable.doClose();
    }
    return result;
}

Example 2 with UncloseableInputStream

use of org.eclipse.rdf4j.common.io.UncloseableInputStream in project rdf4j by eclipse.

the class RDFLoader method loadZip.

private void loadZip(InputStream in, String baseURI, RDFFormat dataFormat, RDFHandler rdfHandler) throws IOException, RDFParseException, RDFHandlerException {
    try (ZipInputStream zipIn = new ZipInputStream(in)) {
        for (ZipEntry entry = zipIn.getNextEntry(); entry != null; entry = zipIn.getNextEntry()) {
            if (entry.isDirectory()) {
                continue;
            }
            try {
                RDFFormat format = Rio.getParserFormatForFileName(entry.getName()).orElse(dataFormat);
                // Prevent parser (Xerces) from closing the input stream
                UncloseableInputStream wrapper = new UncloseableInputStream(zipIn);
                load(wrapper, baseURI, format, rdfHandler);
            } catch (RDFParseException e) {
                String msg = e.getMessage() + " in " + entry.getName();
                RDFParseException pe = new RDFParseException(msg, e.getLineNumber(), e.getColumnNumber());
                pe.initCause(e);
                throw pe;
            } finally {
                zipIn.closeEntry();
            }
        }
    // end for
    }
}