Examples with Item org.exist.xquery.value.Item used on opensource projects

Example 21 with Item

use of org.exist.xquery.value.Item in project exist by eXist-db.

the class ApacheFopTest method simplePdf.

@Test
public void simplePdf() throws EXistException, PermissionDeniedException, XPathException {
    final String fopConfig = "<fop version=\"1.0\">\n" + "    <strict-configuration>true</strict-configuration>\n" + "    <strict-validation>false</strict-validation>\n" + "    <base>./</base>\n" + "    <renderers>\n" + "        <renderer mime=\"application/pdf\"></renderer>\n" + "    </renderers>\n" + "</fop>";
    final String fo = "<fo:root xmlns:fo=\"http://www.w3.org/1999/XSL/Format\">\n" + "    <fo:layout-master-set>\n" + "        <fo:simple-page-master master-name=\"page-left\" page-height=\"297mm\" page-width=\"210mm\" margin-bottom=\"10mm\" margin-top=\"10mm\" margin-left=\"36mm\" margin-right=\"18mm\">\n" + "            <fo:region-body margin-bottom=\"10mm\" margin-top=\"16mm\"/>\n" + "            <fo:region-before region-name=\"head-left\" extent=\"10mm\"/>\n" + "        </fo:simple-page-master>\n" + "        <fo:simple-page-master master-name=\"page-right\" page-height=\"297mm\" page-width=\"210mm\" margin-bottom=\"10mm\" margin-top=\"10mm\" margin-left=\"18mm\" margin-right=\"36mm\">\n" + "            <fo:region-body margin-bottom=\"10mm\" margin-top=\"16mm\"/>\n" + "            <fo:region-before region-name=\"head-right\" extent=\"10mm\"/>\n" + "        </fo:simple-page-master>\n" + "        <fo:page-sequence-master master-name=\"page-content\">\n" + "            <fo:repeatable-page-master-alternatives>\n" + "                <fo:conditional-page-master-reference master-reference=\"page-right\" odd-or-even=\"odd\"/>\n" + "                <fo:conditional-page-master-reference master-reference=\"page-left\" odd-or-even=\"even\"/>\n" + "            </fo:repeatable-page-master-alternatives>\n" + "        </fo:page-sequence-master>\n" + "    </fo:layout-master-set>\n" + "    <fo:page-sequence master-reference=\"page-content\">\n" + "         <fo:flow flow-name=\"xsl-region-body\" hyphenate=\"true\" language=\"en\" xml:lang=\"en\">\n" + "                <fo:block id=\"A97060-t\" line-height=\"16pt\" font-size=\"11pt\">\n" + "                    <fo:block id=\"A97060-e0\" page-break-after=\"right\">\n" + "                        <fo:block id=\"A97060-e100\" text-align=\"justify\" space-before=\".5em\" text-indent=\"1.5em\" space-after=\".5em\">\n" + "                            Hello World!\n" + "                        </fo:block>\n" + "                    </fo:block>\n" + "                </fo:block>\n" + "        </fo:flow>\n" + "    </fo:page-sequence>\n" + "</fo:root>";
    final String xquery = "xquery version \"3.1\";\n" + "\n" + "import module namespace xslfo=\"http://exist-db.org/xquery/xslfo\";\n" + "\n" + "let $config := " + fopConfig + "\n" + "let $fo := " + fo + "\n" + "\n" + "let $pdf := xslfo:render($fo, \"application/pdf\", (), $config)\n" + "return $pdf";
    final BrokerPool pool = server.getBrokerPool();
    final XQuery xqueryService = pool.getXQueryService();
    try (final DBBroker broker = pool.getBroker()) {
        final Sequence result = xqueryService.execute(broker, xquery, null);
        assertNotNull(result);
        assertEquals(1, result.getItemCount());
        final Item pdf = result.itemAt(0);
        assertEquals(Type.BASE64_BINARY, pdf.getType());
    }
}

Example 22 with Item

use of org.exist.xquery.value.Item in project exist by eXist-db.

the class XQueryServlet method process.

/**
 * Processes incoming HTTP requests for XQuery.
 *
 * @param request the http request
 * @param response the http response
 *
 * @throws ServletException if the servlet raises an exception
 * @throws IOException if an I/O error occurs
 */
protected void process(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    // first, adjust the path
    String path = request.getPathTranslated();
    if (path == null) {
        path = request.getRequestURI().substring(request.getContextPath().length());
        final int p = path.lastIndexOf(';');
        if (p != Constants.STRING_NOT_FOUND) {
            path = path.substring(0, p);
        }
        path = getServletContext().getRealPath(path);
    }
    // second, perform descriptor actions
    final Descriptor descriptor = Descriptor.getDescriptorSingleton();
    if (descriptor != null && !descriptor.requestsFiltered()) {
        // logs the request if specified in the descriptor
        descriptor.doLogRequestInReplayLog(request);
        // map's the path if a mapping is specified in the descriptor
        path = descriptor.mapPath(path);
    }
    // if (request.getCharacterEncoding() == null)
    // try {
    // request.setCharacterEncoding(formEncoding);
    // } catch (IllegalStateException e) {
    // }
    final ServletOutputStream sout = response.getOutputStream();
    final PrintWriter output = new PrintWriter(new OutputStreamWriter(sout, getFormEncoding()));
    // response.setContentType(contentType + "; charset=" + formEncoding);
    response.addHeader("pragma", "no-cache");
    response.addHeader("Cache-Control", "no-cache");
    String requestPath = request.getRequestURI();
    final int p = requestPath.lastIndexOf('/');
    if (p != Constants.STRING_NOT_FOUND) {
        requestPath = requestPath.substring(0, p);
    }
    String moduleLoadPath;
    final Object loadPathAttrib = request.getAttribute(ATTR_MODULE_LOAD_PATH);
    if (loadPathAttrib != null) {
        moduleLoadPath = getValue(loadPathAttrib);
    } else {
        moduleLoadPath = getServletContext().getRealPath(requestPath.substring(request.getContextPath().length()));
    }
    Subject user = getDefaultUser();
    // to determine the user, first check the request attribute "xquery.user", then
    // the current session attribute "user"
    final Object userAttrib = request.getAttribute(ATTR_XQUERY_USER);
    final HttpSession session = request.getSession(false);
    if (userAttrib != null || (session != null && request.isRequestedSessionIdValid())) {
        final Object passwdAttrib = request.getAttribute(ATTR_XQUERY_PASSWORD);
        String username;
        String password;
        if (userAttrib != null) {
            username = getValue(userAttrib);
            password = getValue(passwdAttrib);
        } else {
            username = getSessionAttribute(session, "user");
            password = getSessionAttribute(session, "password");
        }
        // TODO authentication should use super.authenticate(...) !!!
        try {
            if (username != null && password != null) {
                Subject newUser = getPool().getSecurityManager().authenticate(username, password);
                if (newUser != null && newUser.isAuthenticated()) {
                    user = newUser;
                }
            }
        } catch (final AuthenticationException e) {
            getLog().error("User can not be authenticated ({}).", username);
        }
    }
    if (user == getDefaultUser()) {
        Subject requestUser = HttpAccount.getUserFromServletRequest(request);
        if (requestUser != null) {
            user = requestUser;
        } else {
            requestUser = getAuthenticator().authenticate(request, response, false);
            if (requestUser != null) {
                user = requestUser;
            }
        }
    }
    Source source = null;
    final Object sourceAttrib = request.getAttribute(ATTR_XQUERY_SOURCE);
    final Object urlAttrib = request.getAttribute(ATTR_XQUERY_URL);
    if (sourceAttrib != null) {
        String s;
        if (sourceAttrib instanceof Item)
            try {
                s = ((Item) sourceAttrib).getStringValue();
            } catch (final XPathException e) {
                throw new ServletException("Failed to read XQuery source string from " + "request attribute '" + ATTR_XQUERY_SOURCE + "': " + e.getMessage(), e);
            }
        else {
            s = sourceAttrib.toString();
        }
        source = new StringSource(s);
    } else if (urlAttrib != null) {
        try (final DBBroker broker = getPool().get(Optional.ofNullable(user))) {
            source = SourceFactory.getSource(broker, moduleLoadPath, urlAttrib.toString(), true);
            if (source == null) {
                final String msg = "Could not read source: context=" + moduleLoadPath + ", location=" + urlAttrib.toString();
                getLog().error(msg);
                response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
                sendError(output, "Error", msg);
            }
        } catch (final Exception e) {
            getLog().error(e.getMessage(), e);
            response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
            sendError(output, "Error", e.getMessage());
        }
    } else {
        final Path f = Paths.get(path);
        if (!Files.isReadable(f)) {
            response.setStatus(HttpServletResponse.SC_NOT_FOUND);
            sendError(output, "Cannot read source file", path);
            return;
        }
        source = new FileSource(f, Charset.forName(encoding), true);
    }
    if (source == null) {
        response.setStatus(HttpServletResponse.SC_NOT_FOUND);
        sendError(output, "Source not found", path);
    }
    boolean reportErrors = false;
    final String errorOpt = (String) request.getAttribute(ATTR_XQUERY_REPORT_ERRORS);
    if (errorOpt != null) {
        reportErrors = errorOpt.equalsIgnoreCase("YES");
    }
    // allow source viewing for GET?
    if ("GET".equals(request.getMethod().toUpperCase())) {
        String option;
        boolean allowSource = false;
        if ((option = request.getParameter("_source")) != null)
            allowSource = "yes".equals(option);
        // Should we display the source of the XQuery or execute it
        if (allowSource && descriptor != null) {
            // System.out.println("path="+path);
            if (descriptor.allowSource(path)) {
                if (source instanceof DBSource) {
                    try {
                        ((DBSource) source).validate(user, Permission.READ);
                    } catch (final PermissionDeniedException e) {
                        if (getDefaultUser().equals(user)) {
                            getAuthenticator().sendChallenge(request, response);
                        } else {
                            response.sendError(HttpServletResponse.SC_FORBIDDEN, "Permission to view XQuery source for: " + path + " denied. (no read access)");
                        }
                        return;
                    }
                }
                // Show the source of the XQuery
                // writeResourceAs(resource, broker, stylesheet, encoding, "text/plain", outputProperties, response);
                response.setContentType("text/plain; charset=" + getFormEncoding());
                output.write(source.getContent());
                output.flush();
                return;
            } else {
                response.sendError(HttpServletResponse.SC_FORBIDDEN, "Permission to view XQuery source for: " + path + " denied. Must be explicitly defined in descriptor.xml");
                return;
            }
        }
    }
    // -------------------------------
    // URI baseUri;
    // try {
    // baseUri = new URI(request.getScheme(),
    // null/*user info?*/, request.getLocalPart(), request.getLocalPort(),
    // request.getRequestURI(), null, null);
    // } catch(URISyntaxException e) {
    // baseUri = null;
    // }
    final String requestAttr = (String) request.getAttribute(ATTR_XQUERY_ATTRIBUTE);
    try (final DBBroker broker = getPool().get(Optional.ofNullable(user))) {
        final XQuery xquery = broker.getBrokerPool().getXQueryService();
        CompiledXQuery query = getPool().getXQueryPool().borrowCompiledXQuery(broker, source);
        XQueryContext context;
        if (query == null) {
            context = new XQueryContext(getPool());
            context.setModuleLoadPath(moduleLoadPath);
            try {
                query = xquery.compile(context, source);
            } catch (final XPathException ex) {
                throw new EXistException("Cannot compile xquery: " + ex.getMessage(), ex);
            } catch (final IOException ex) {
                throw new EXistException("I/O exception while compiling xquery: " + ex.getMessage(), ex);
            }
        } else {
            context = query.getContext();
            context.setModuleLoadPath(moduleLoadPath);
            context.prepareForReuse();
        }
        final Properties outputProperties = new Properties();
        outputProperties.put("base-uri", collectionURI.toString());
        final HttpRequestWrapper reqw = new HttpRequestWrapper(request, getFormEncoding(), getContainerEncoding());
        final ResponseWrapper respw = new HttpResponseWrapper(response);
        context.setHttpContext(new XQueryContext.HttpContext(reqw, respw, session != null ? new HttpSessionWrapper(session) : null));
        final String timeoutOpt = (String) request.getAttribute(ATTR_TIMEOUT);
        if (timeoutOpt != null) {
            try {
                final long timeout = Long.parseLong(timeoutOpt);
                context.getWatchDog().setTimeout(timeout);
            } catch (final NumberFormatException e) {
                throw new EXistException("Bad timeout option: " + timeoutOpt);
            }
        }
        final String maxNodesOpt = (String) request.getAttribute(ATTR_MAX_NODES);
        if (maxNodesOpt != null) {
            try {
                final int maxNodes = Integer.parseInt(maxNodesOpt);
                context.getWatchDog().setMaxNodes(maxNodes);
            } catch (final NumberFormatException e) {
                throw new EXistException("Bad max-nodes option: " + maxNodesOpt);
            }
        }
        DebuggeeFactory.checkForDebugRequest(request, context);
        Sequence resultSequence;
        try {
            resultSequence = xquery.execute(broker, query, null, outputProperties);
        } finally {
            context.runCleanupTasks();
            getPool().getXQueryPool().returnCompiledXQuery(source, query);
        }
        final String mediaType = outputProperties.getProperty(OutputKeys.MEDIA_TYPE);
        if (mediaType != null) {
            if (!response.isCommitted()) {
                if (MimeTable.getInstance().isTextContent(mediaType)) {
                    response.setContentType(mediaType + "; charset=" + getFormEncoding());
                    response.setCharacterEncoding(getFormEncoding());
                } else
                    response.setContentType(mediaType);
            }
        } else {
            String contentType = this.contentType;
            try {
                contentType = getServletContext().getMimeType(path);
                if (contentType == null) {
                    contentType = this.contentType;
                }
            } catch (final Throwable e) {
                contentType = this.contentType;
            } finally {
                if (MimeTable.getInstance().isTextContent(contentType)) {
                    contentType += "; charset=" + getFormEncoding();
                }
                response.setContentType(contentType);
            }
        }
        if (requestAttr != null && (XmldbURI.API_LOCAL.equals(collectionURI.getApiName()))) {
            request.setAttribute(requestAttr, resultSequence);
        } else {
            XQuerySerializer serializer = new XQuerySerializer(broker, outputProperties, output);
            serializer.serialize(resultSequence);
        }
    } catch (final PermissionDeniedException e) {
        if (getDefaultUser().equals(user)) {
            getAuthenticator().sendChallenge(request, response);
        } else {
            response.sendError(HttpServletResponse.SC_FORBIDDEN, "No permission to execute XQuery for: " + path + " denied.");
        }
        return;
    } catch (final XPathException e) {
        final Logger logger = getLog();
        if (logger.isDebugEnabled()) {
            logger.debug(e.getMessage(), e);
        }
        if (reportErrors) {
            writeError(output, e);
        } else {
            response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
            sendError(output, "Error", e.getMessage());
        }
    } catch (final Throwable e) {
        getLog().error(e.getMessage(), e);
        if (reportErrors) {
            writeError(output, e);
        } else {
            response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
            sendError(output, "Error", e.getMessage());
        }
    }
    output.flush();
    output.close();
}

Example 23 with Item

use of org.exist.xquery.value.Item in project exist by eXist-db.

the class CallFunction method eval.

/* (non-Javadoc)
     * @see org.exist.xquery.BasicFunction#eval(org.exist.xquery.value.Sequence[], org.exist.xquery.value.Sequence)
     */
public Sequence eval(Sequence contextSequence, Item contextItem) throws XPathException {
    final Sequence arg0 = getArgument(0).eval(contextSequence, contextItem);
    if (arg0.getCardinality() != Cardinality.EXACTLY_ONE) {
        throw new XPathException(this, "Expected exactly one item for first argument");
    }
    final Item item0 = arg0.itemAt(0);
    if (item0.getType() != Type.FUNCTION_REFERENCE) {
        throw new XPathException(this, "Type error: expected function, got " + Type.getTypeName(item0.getType()));
    }
    try (final FunctionReference ref = (FunctionReference) item0) {
        // pass the remaining parameters to the function call
        final List<Expression> params = new ArrayList<>(getArgumentCount() - 1);
        for (int i = 1; i < getArgumentCount(); i++) {
            params.add(getArgument(i));
        }
        ref.setArguments(params);
        ref.analyze(new AnalyzeContextInfo(this, 0));
        // Evaluate the function
        return ref.eval(contextSequence);
    }
}

Example 24 with Item

use of org.exist.xquery.value.Item in project exist by eXist-db.

the class Modification method deepCopy.

protected Sequence deepCopy(Sequence inSeq) throws XPathException {
    context.pushDocumentContext();
    final MemTreeBuilder builder = context.getDocumentBuilder();
    final DocumentBuilderReceiver receiver = new DocumentBuilderReceiver(builder);
    final Serializer serializer = context.getBroker().borrowSerializer();
    serializer.setReceiver(receiver);
    try {
        final Sequence out = new ValueSequence();
        for (final SequenceIterator i = inSeq.iterate(); i.hasNext(); ) {
            Item item = i.nextItem();
            if (item.getType() == Type.DOCUMENT) {
                if (((NodeValue) item).getImplementationType() == NodeValue.PERSISTENT_NODE) {
                    final NodeHandle root = (NodeHandle) ((NodeProxy) item).getOwnerDocument().getDocumentElement();
                    item = new NodeProxy(root);
                } else {
                    item = (Item) ((Document) item).getDocumentElement();
                }
            }
            if (Type.subTypeOf(item.getType(), Type.NODE)) {
                if (((NodeValue) item).getImplementationType() == NodeValue.PERSISTENT_NODE) {
                    final int last = builder.getDocument().getLastNode();
                    final NodeProxy p = (NodeProxy) item;
                    serializer.toReceiver(p, false, false);
                    if (p.getNodeType() == Node.ATTRIBUTE_NODE) {
                        item = builder.getDocument().getLastAttr();
                    } else {
                        item = builder.getDocument().getNode(last + 1);
                    }
                } else {
                    ((org.exist.dom.memtree.NodeImpl) item).deepCopy();
                }
            }
            out.add(item);
        }
        return out;
    } catch (final SAXException | DOMException e) {
        throw new XPathException(this, e.getMessage(), e);
    } finally {
        context.getBroker().returnSerializer(serializer);
        context.popDocumentContext();
    }
}

Example 25 with Item

use of org.exist.xquery.value.Item in project exist by eXist-db.

the class Update method eval.

/* (non-Javadoc)
     * @see org.exist.xquery.AbstractExpression#eval(org.exist.xquery.value.Sequence, org.exist.xquery.value.Item)
     */
public Sequence eval(Sequence contextSequence, Item contextItem) throws XPathException {
    if (context.getProfiler().isEnabled()) {
        context.getProfiler().start(this);
        context.getProfiler().message(this, Profiler.DEPENDENCIES, "DEPENDENCIES", Dependency.getDependenciesName(this.getDependencies()));
        if (contextSequence != null) {
            context.getProfiler().message(this, Profiler.START_SEQUENCES, "CONTEXT SEQUENCE", contextSequence);
        }
        if (contextItem != null) {
            context.getProfiler().message(this, Profiler.START_SEQUENCES, "CONTEXT ITEM", contextItem.toSequence());
        }
    }
    if (contextItem != null) {
        contextSequence = contextItem.toSequence();
    }
    final Sequence contentSeq = value.eval(contextSequence);
    if (contentSeq.isEmpty()) {
        throw new XPathException(this, Messages.getMessage(Error.UPDATE_EMPTY_CONTENT));
    }
    final Sequence inSeq = select.eval(contextSequence);
    /* If we try and Update a node at an invalid location,
         * trap the error in a context variable,
         * this is then accessible from xquery via. the context extension module - deliriumsky
         * TODO: This trapping could be expanded further - basically where XPathException is thrown from thiss class
         * TODO: Maybe we could provide more detailed messages in the trap, e.g. couldnt update node `xyz` into `abc` becuase... this would be nicer for the end user of the xquery application
         */
    if (!Type.subTypeOf(inSeq.getItemType(), Type.NODE)) {
        // Indicate the failure to perform this update by adding it to the sequence in the context variable XQueryContext.XQUERY_CONTEXTVAR_XQUERY_UPDATE_ERROR
        ValueSequence prevUpdateErrors = null;
        final XPathException xpe = new XPathException(this, Messages.getMessage(Error.UPDATE_SELECT_TYPE));
        final Object ctxVarObj = context.getAttribute(XQueryContext.XQUERY_CONTEXTVAR_XQUERY_UPDATE_ERROR);
        if (ctxVarObj == null) {
            prevUpdateErrors = new ValueSequence();
        } else {
            prevUpdateErrors = (ValueSequence) XPathUtil.javaObjectToXPath(ctxVarObj, context);
        }
        prevUpdateErrors.add(new StringValue(xpe.getMessage()));
        context.setAttribute(XQueryContext.XQUERY_CONTEXTVAR_XQUERY_UPDATE_ERROR, prevUpdateErrors);
        if (!inSeq.isEmpty()) {
            // TODO: should we trap this instead of throwing an exception - deliriumsky?
            throw xpe;
        }
    }
    if (!inSeq.isEmpty()) {
        context.pushInScopeNamespaces();
        // start a transaction
        try (final Txn transaction = getTransaction()) {
            final NotificationService notifier = context.getBroker().getBrokerPool().getNotificationService();
            final StoredNode[] ql = selectAndLock(transaction, inSeq);
            for (final StoredNode node : ql) {
                final DocumentImpl doc = node.getOwnerDocument();
                if (!doc.getPermissions().validate(context.getSubject(), Permission.WRITE)) {
                    throw new XPathException(this, "User '" + context.getSubject().getName() + "' does not have permission to write to the document '" + doc.getDocumentURI() + "'!");
                }
                // update the document
                switch(node.getNodeType()) {
                    case Node.ELEMENT_NODE:
                        final NodeListImpl content = new NodeListImpl();
                        for (final SequenceIterator j = contentSeq.iterate(); j.hasNext(); ) {
                            final Item next = j.nextItem();
                            if (Type.subTypeOf(next.getType(), Type.NODE)) {
                                content.add(((NodeValue) next).getNode());
                            } else {
                                final TextImpl text = new TextImpl(next.getStringValue());
                                content.add(text);
                            }
                        }
                        ((ElementImpl) node).update(transaction, content);
                        break;
                    case Node.TEXT_NODE:
                        final ElementImpl textParent = (ElementImpl) node.getParentNode();
                        final TextImpl text = new TextImpl(contentSeq.getStringValue());
                        text.setOwnerDocument(doc);
                        textParent.updateChild(transaction, node, text);
                        break;
                    case Node.ATTRIBUTE_NODE:
                        final ElementImpl attrParent = (ElementImpl) ((Attr) node).getOwnerElement();
                        if (attrParent == null) {
                            LOG.warn("parent node not found for {}", node.getNodeId());
                            break;
                        }
                        final AttrImpl attr = (AttrImpl) node;
                        final AttrImpl attribute = new AttrImpl(attr.getQName(), contentSeq.getStringValue(), context.getBroker().getBrokerPool().getSymbols());
                        attribute.setOwnerDocument(doc);
                        attrParent.updateChild(transaction, node, attribute);
                        break;
                    default:
                        throw new XPathException(this, "unsupported node-type");
                }
                doc.setLastModified(System.currentTimeMillis());
                modifiedDocuments.add(doc);
                context.getBroker().storeXMLResource(transaction, doc);
                notifier.notifyUpdate(doc, UpdateListener.UPDATE);
            }
            finishTriggers(transaction);
            // commit the transaction
            transaction.commit();
        } catch (final LockException | EXistException | TriggerException e) {
            throw new XPathException(this, e.getMessage(), e);
        } finally {
            unlockDocuments();
            context.popInScopeNamespaces();
        }
    }
    if (context.getProfiler().isEnabled()) {
        context.getProfiler().end(this, "", Sequence.EMPTY_SEQUENCE);
    }
    return Sequence.EMPTY_SEQUENCE;
}