Examples with DBSource org.exist.source.DBSource used on opensource projects

Example 1 with DBSource

use of org.exist.source.DBSource in project exist by eXist-db.

the class RESTServer method executeXQuery.

/**
 * Directly execute an XQuery stored as a binary document in the database.
 *
 * @throws PermissionDeniedException
 */
private void executeXQuery(final DBBroker broker, final Txn transaction, final DocumentImpl resource, final HttpServletRequest request, final HttpServletResponse response, final Properties outputProperties, final String servletPath, final String pathInfo) throws XPathException, BadRequestException, PermissionDeniedException {
    final Source source = new DBSource(broker, (BinaryDocument) resource, true);
    final XQueryPool pool = broker.getBrokerPool().getXQueryPool();
    CompiledXQuery compiled = null;
    try {
        final XQuery xquery = broker.getBrokerPool().getXQueryService();
        compiled = pool.borrowCompiledXQuery(broker, source);
        XQueryContext context;
        if (compiled == null) {
            // special header to indicate that the query is not returned from
            // cache
            response.setHeader("X-XQuery-Cached", "false");
            context = new XQueryContext(broker.getBrokerPool());
        } else {
            response.setHeader("X-XQuery-Cached", "true");
            context = compiled.getContext();
            context.prepareForReuse();
        }
        // TODO: don't hardcode this?
        context.setModuleLoadPath(XmldbURI.EMBEDDED_SERVER_URI.append(resource.getCollection().getURI()).toString());
        context.setStaticallyKnownDocuments(new XmldbURI[] { resource.getCollection().getURI() });
        final HttpRequestWrapper reqw = declareVariables(context, null, request, response);
        reqw.setServletPath(servletPath);
        reqw.setPathInfo(pathInfo);
        final long compilationTime;
        if (compiled == null) {
            try {
                final long compilationStart = System.currentTimeMillis();
                compiled = xquery.compile(context, source);
                compilationTime = System.currentTimeMillis() - compilationStart;
            } catch (final IOException e) {
                throw new BadRequestException("Failed to read query from " + resource.getURI(), e);
            }
        } else {
            compilationTime = 0;
        }
        DebuggeeFactory.checkForDebugRequest(request, context);
        boolean wrap = outputProperties.getProperty("_wrap") != null && "yes".equals(outputProperties.getProperty("_wrap"));
        try {
            final long executeStart = System.currentTimeMillis();
            final Sequence result = xquery.execute(broker, compiled, null, outputProperties);
            writeResults(response, broker, transaction, result, -1, 1, false, outputProperties, wrap, compilationTime, System.currentTimeMillis() - executeStart);
        } finally {
            context.runCleanupTasks();
        }
    } finally {
        if (compiled != null) {
            pool.returnCompiledXQuery(source, compiled);
        }
    }
}

Example 2 with DBSource

use of org.exist.source.DBSource in project exist by eXist-db.

the class XQueryURLRewrite method getSource.

private SourceInfo getSource(final DBBroker broker, final String moduleLoadPath) throws ServletException {
    final SourceInfo sourceInfo;
    if (query.startsWith(XmldbURI.XMLDB_URI_PREFIX)) {
        // Is the module source stored in the database?
        try {
            final XmldbURI locationUri = XmldbURI.xmldbUriFor(query);
            try (final LockedDocument lockedSourceDoc = broker.getXMLResource(locationUri.toCollectionPathURI(), LockMode.READ_LOCK)) {
                if (lockedSourceDoc == null) {
                    throw new ServletException("XQuery resource: " + query + " not found in database");
                }
                final DocumentImpl sourceDoc = lockedSourceDoc.getDocument();
                if (sourceDoc.getResourceType() != DocumentImpl.BINARY_FILE || !"application/xquery".equals(sourceDoc.getMimeType())) {
                    throw new ServletException("XQuery resource: " + query + " is not an XQuery or " + "declares a wrong mime-type");
                }
                sourceInfo = new SourceInfo(new DBSource(broker, (BinaryDocument) sourceDoc, true), locationUri.toString());
            } catch (final PermissionDeniedException e) {
                throw new ServletException("permission denied to read module source from " + query);
            }
        } catch (final URISyntaxException e) {
            throw new ServletException(e.getMessage(), e);
        }
    } else {
        try {
            sourceInfo = new SourceInfo(SourceFactory.getSource(broker, moduleLoadPath, query, true), moduleLoadPath);
        } catch (final IOException e) {
            throw new ServletException("IO error while reading XQuery source: " + query);
        } catch (final PermissionDeniedException e) {
            throw new ServletException("Permission denied while reading XQuery source: " + query);
        }
    }
    return sourceInfo;
}

Example 3 with DBSource

use of org.exist.source.DBSource in project exist by eXist-db.

the class Eval method doEval.

private Sequence doEval(final XQueryContext evalContext, final Sequence contextSequence, final Sequence[] args) throws XPathException {
    if (evalContext.getProfiler().isEnabled()) {
        evalContext.getProfiler().start(this);
        evalContext.getProfiler().message(this, Profiler.DEPENDENCIES, "DEPENDENCIES", Dependency.getDependenciesName(this.getDependencies()));
        if (contextSequence != null) {
            evalContext.getProfiler().message(this, Profiler.START_SEQUENCES, "CONTEXT SEQUENCE", contextSequence);
        }
    }
    int argCount = 0;
    Sequence exprContext = null;
    if (isCalledAs(FS_EVAL_INLINE_NAME)) {
        // the current expression context
        exprContext = args[argCount++];
    }
    // get the query expression
    final Item expr = args[argCount++].itemAt(0);
    final Source querySource;
    if (Type.subTypeOf(expr.getType(), Type.ANY_URI)) {
        querySource = loadQueryFromURI(expr);
    } else {
        final String queryStr = expr.getStringValue();
        if (queryStr.trim().isEmpty()) {
            return new EmptySequence();
        }
        querySource = new StringSource(queryStr);
    }
    final NodeValue contextInit;
    if (isCalledAs(FS_EVAL_WITH_CONTEXT_NAME)) {
        // set the context initialization param for later use
        contextInit = (NodeValue) args[argCount++].itemAt(0);
    } else {
        contextInit = null;
    }
    // should the compiled query be cached?
    final boolean cache;
    if (isCalledAs(FS_EVAL_AND_SERIALIZE_NAME)) {
        cache = true;
    } else if (argCount < getArgumentCount()) {
        cache = ((BooleanValue) args[argCount++].itemAt(0)).effectiveBooleanValue();
    } else {
        cache = false;
    }
    // save some context properties
    evalContext.pushNamespaceContext();
    final LocalVariable mark = evalContext.markLocalVariables(false);
    // save the static document set of the current context, so it can be restored later
    final DocumentSet oldDocs = evalContext.getStaticDocs();
    if (exprContext != null) {
        evalContext.setStaticallyKnownDocuments(exprContext.getDocumentSet());
    }
    if (evalContext.isProfilingEnabled(2)) {
        evalContext.getProfiler().start(this, "eval: " + expr);
    }
    // fixme! - hook for debugger here /ljo
    final XQuery xqueryService = evalContext.getBroker().getBrokerPool().getXQueryService();
    final XQueryContext innerContext;
    final Sequence initContextSequence;
    if (contextInit != null) {
        // eval-with-context: initialize a new context
        innerContext = new XQueryContext(context.getBroker().getBrokerPool());
        initContextSequence = initContext(contextInit.getNode(), innerContext);
    } else {
        // use the existing outer context
        // TODO: check if copying the static context would be sufficient???
        innerContext = evalContext.copyContext();
        innerContext.setShared(true);
        // innerContext = context;
        initContextSequence = null;
    }
    // set module load path
    if (Type.subTypeOf(expr.getType(), Type.ANY_URI)) {
        String uri = null;
        if (querySource instanceof DBSource) {
            final XmldbURI documentPath = ((DBSource) querySource).getDocumentPath();
            uri = XmldbURI.EMBEDDED_SERVER_URI.append(documentPath).removeLastSegment().toString();
        } else if (querySource instanceof FileSource) {
            uri = ((FileSource) querySource).getPath().getParent().toString();
        }
        if (uri != null) {
            innerContext.setModuleLoadPath(uri);
        }
    }
    // bind external vars?
    if (isCalledAs(FS_EVAL_NAME) && getArgumentCount() >= 3) {
        final Sequence externalVars = args[argCount++];
        for (int i = 0; i < externalVars.getItemCount(); i++) {
            final Item varName = externalVars.itemAt(i);
            if (varName.getType() == Type.QNAME) {
                final Item varValue = externalVars.itemAt(++i);
                innerContext.declareVariable(((QNameValue) varName).getQName(), varValue);
            }
        }
    }
    // determine if original line/column number are passed on
    final boolean pass;
    if (isCalledAs(FS_EVAL_NAME) && getArgumentCount() == 4) {
        pass = args[3].itemAt(0).toJavaObject(Boolean.class);
    } else if (isCalledAs(FS_EVAL_WITH_CONTEXT_NAME) && getArgumentCount() == 5) {
        pass = args[4].itemAt(0).toJavaObject(Boolean.class);
    } else if (isCalledAs(FS_EVAL_INLINE_NAME) && getArgumentCount() == 4) {
        pass = args[3].itemAt(0).toJavaObject(Boolean.class);
    } else if (isCalledAs(FS_EVAL_AND_SERIALIZE_NAME) && getArgumentCount() == 5) {
        pass = args[4].itemAt(0).toJavaObject(Boolean.class);
    } else {
        // default
        pass = false;
    }
    // fixme! - hook for debugger here /ljo
    try {
        if (isCalledAs(FS_EVAL_WITH_CONTEXT_NAME) && getArgumentCount() >= 4) {
            final Item contextItem = args[argCount++].itemAt(0);
            if (contextItem != null) {
                // TODO : sort this out
                if (exprContext != null) {
                    LOG.warn("exprContext and contextItem are not null");
                }
                exprContext = contextItem.toSequence();
            }
        }
        if (initContextSequence != null) {
            exprContext = initContextSequence;
        }
        Sequence result = null;
        try {
            if (!isCalledAs(FS_EVAL_AND_SERIALIZE_NAME)) {
                result = execute(evalContext.getBroker(), xqueryService, querySource, innerContext, exprContext, cache, null);
                return result;
            } else {
                // get the default serialization options
                final Properties defaultOutputOptions;
                if (getArgumentCount() >= 2 && !args[1].isEmpty()) {
                    defaultOutputOptions = FunSerialize.getSerializationProperties(this, args[1].itemAt(0));
                } else {
                    defaultOutputOptions = new Properties();
                }
                // execute the query, XQuery prolog serialization options are collected into `xqueryOutputProperties`
                final Properties xqueryOutputProperties = new Properties();
                result = execute(evalContext.getBroker(), xqueryService, querySource, innerContext, exprContext, cache, xqueryOutputProperties);
                // do we need to subsequence the results?
                if (getArgumentCount() > 2) {
                    result = FunSubSequence.subsequence(result, ((DoubleValue) getArgument(2).eval(contextSequence, null).convertTo(Type.DOUBLE)), getArgumentCount() == 3 ? null : ((DoubleValue) getArgument(3).eval(contextSequence, null).convertTo(Type.DOUBLE)));
                }
                // override the default options with the ones from the xquery prolog
                final Properties serializationProperties = new Properties();
                serializationProperties.putAll(defaultOutputOptions);
                serializationProperties.putAll(xqueryOutputProperties);
                // serialize the results
                try (final StringWriter writer = new StringWriter()) {
                    final XQuerySerializer xqSerializer = new XQuerySerializer(context.getBroker(), serializationProperties, writer);
                    final Sequence seq;
                    if (xqSerializer.normalize()) {
                        seq = FunSerialize.normalize(this, context, result);
                    } else {
                        seq = result;
                    }
                    xqSerializer.serialize(seq);
                    return new StringValue(writer.toString());
                } catch (final IOException | SAXException e) {
                    throw new XPathException(this, FnModule.SENR0001, e.getMessage());
                }
            }
        } finally {
            cleanup(evalContext, innerContext, oldDocs, mark, expr, result);
        }
    } catch (final XPathException e) {
        try {
            e.prependMessage("Error while evaluating expression: " + querySource.getContent() + ". ");
        } catch (final IOException e1) {
        }
        if (!pass) {
            e.setLocation(line, column);
        }
        throw e;
    }
}

Example 4 with DBSource

use of org.exist.source.DBSource in project exist by eXist-db.

the class ResourceFunctionExecutorImpl method getEffectiveSubject.

/**
 * If the compiled xquery is setUid and/or setGid
 * we return the EffectiveSubject that should be used
 * for execution
 *
 * @param xquery The XQuery to determine the effective subject for
 * @return Maybe an effective subject or empty if there is no setUid or setGid bits
 */
private Optional<EffectiveSubject> getEffectiveSubject(final CompiledXQuery xquery) {
    final Optional<EffectiveSubject> effectiveSubject;
    final Source src = xquery.getContext().getSource();
    if (src instanceof DBSource) {
        final DBSource dbSrc = (DBSource) src;
        final Permission perm = dbSrc.getPermissions();
        if (perm.isSetUid()) {
            if (perm.isSetGid()) {
                // setUid and SetGid
                effectiveSubject = Optional.of(new EffectiveSubject(perm.getOwner(), perm.getGroup()));
            } else {
                // just setUid
                effectiveSubject = Optional.of(new EffectiveSubject(perm.getOwner()));
            }
        } else if (perm.isSetGid()) {
            // just setGid, so we use the current user as the effective user
            effectiveSubject = Optional.of(new EffectiveSubject(xquery.getContext().getBroker().getCurrentSubject(), perm.getGroup()));
        } else {
            effectiveSubject = Optional.empty();
        }
    } else {
        effectiveSubject = Optional.empty();
    }
    return effectiveSubject;
}

Example 5 with DBSource

use of org.exist.source.DBSource in project exist by eXist-db.

the class XQueryInspector method getDependencies.

private static void getDependencies(final XQueryContext xqyCtx, final Map<String, Set<String>> dependencies) {
    final String xqueryUri = getDbUri(xqyCtx.getSource());
    Set<String> depSet = dependencies.get(xqueryUri);
    if (depSet == null) {
        final Iterator<Module> itModule = xqyCtx.getModules();
        while (itModule.hasNext()) {
            final Module module = itModule.next();
            if (module instanceof ExternalModule) {
                final ExternalModule extModule = (ExternalModule) module;
                final Source source = extModule.getSource();
                if (source instanceof DBSource) {
                    final String moduleUri = getDbUri(source);
                    if (depSet == null) {
                        depSet = new HashSet<>();
                    }
                    depSet.add(moduleUri);
                    /*
                         * must merge map here as recursive function
                         * can cause problems with recursive
                         * module imports m1 -> m2 -> m2 -> m1
                         */
                    dependencies.put(xqueryUri, depSet);
                }
                getDependencies(extModule.getContext(), dependencies);
            }
        }
    }
}