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

Example 86 with Item

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

the class Shared method getStreamSource.

public static StreamSource getStreamSource(Item item, XQueryContext context) throws XPathException, IOException {
    final StreamSource streamSource = new StreamSource();
    if (item.getType() == Type.JAVA_OBJECT) {
        LOG.debug("Streaming Java object");
        final Object obj = ((JavaObjectValue) item).getObject();
        if (!(obj instanceof File)) {
            throw new XPathException("Passed java object should be a File");
        }
        final File inputFile = (File) obj;
        final InputStream is = new FileInputStream(inputFile);
        streamSource.setInputStream(is);
        streamSource.setSystemId(inputFile.toURI().toURL().toString());
    } else if (item.getType() == Type.ANY_URI) {
        LOG.debug("Streaming xs:anyURI");
        // anyURI provided
        String url = item.getStringValue();
        // Fix URL
        if (url.startsWith("/")) {
            url = "xmldb:exist://" + url;
        }
        final InputStream is = new URL(url).openStream();
        streamSource.setInputStream(is);
        streamSource.setSystemId(url);
    } else if (item.getType() == Type.ELEMENT || item.getType() == Type.DOCUMENT) {
        LOG.debug("Streaming element or document node");
        if (item instanceof NodeProxy) {
            final NodeProxy np = (NodeProxy) item;
            final String url = "xmldb:exist://" + np.getOwnerDocument().getBaseURI();
            LOG.debug("Document detected, adding URL {}", url);
            streamSource.setSystemId(url);
        }
        // Node provided
        final DBBroker broker = context.getBroker();
        final ConsumerE<ConsumerE<Serializer, IOException>, IOException> withSerializerFn = fn -> {
            final Serializer serializer = broker.borrowSerializer();
            try {
                fn.accept(serializer);
            } finally {
                broker.returnSerializer(serializer);
            }
        };
        final NodeValue node = (NodeValue) item;
        final InputStream is = new NodeInputStream(context.getBroker().getBrokerPool(), withSerializerFn, node);
        streamSource.setInputStream(is);
    } else if (item.getType() == Type.BASE64_BINARY || item.getType() == Type.HEX_BINARY) {
        LOG.debug("Streaming base64 binary");
        final BinaryValue binary = (BinaryValue) item;
        final byte[] data = binary.toJavaObject(byte[].class);
        final InputStream is = new UnsynchronizedByteArrayInputStream(data);
        streamSource.setInputStream(is);
        if (item instanceof Base64BinaryDocument) {
            final Base64BinaryDocument b64doc = (Base64BinaryDocument) item;
            final String url = "xmldb:exist://" + b64doc.getUrl();
            LOG.debug("Base64BinaryDocument detected, adding URL {}", url);
            streamSource.setSystemId(url);
        }
    } else {
        LOG.error("Wrong item type {}", Type.getTypeName(item.getType()));
        throw new XPathException("wrong item type " + Type.getTypeName(item.getType()));
    }
    return streamSource;
}

Example 87 with Item

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

the class Rename method eval.

@Override
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 Rename 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 rename 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()) {
        QName newQName;
        final Item item = contentSeq.itemAt(0);
        if (item.getType() == Type.QNAME) {
            newQName = ((QNameValue) item).getQName();
        } else {
            try {
                newQName = QName.parse(context, item.getStringValue());
            } catch (final QName.IllegalQNameException iqe) {
                throw new XPathException(this, ErrorCodes.XPST0081, "No namespace defined for prefix " + item.getStringValue());
            }
        }
        // start a transaction
        try (final Txn transaction = getTransaction()) {
            final StoredNode[] ql = selectAndLock(transaction, inSeq);
            final NotificationService notifier = context.getBroker().getBrokerPool().getNotificationService();
            for (final StoredNode node : ql) {
                final DocumentImpl doc = node.getOwnerDocument();
                if (!doc.getPermissions().validate(context.getSubject(), Permission.WRITE)) {
                    throw new PermissionDeniedException("User '" + context.getSubject().getName() + "' does not have permission to write to the document '" + doc.getDocumentURI() + "'!");
                }
                final NodeImpl parent = (NodeImpl) getParent(node);
                // update the document
                final NamedNode newNode;
                switch(node.getNodeType()) {
                    case Node.ELEMENT_NODE:
                        newNode = new ElementImpl((ElementImpl) node);
                        break;
                    case Node.ATTRIBUTE_NODE:
                        newNode = new AttrImpl((AttrImpl) node);
                        break;
                    default:
                        throw new XPathException(this, "unsupported node-type");
                }
                newNode.setNodeName(newQName, context.getBroker().getBrokerPool().getSymbols());
                parent.updateChild(transaction, node, newNode);
                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 PermissionDeniedException | EXistException | LockException | TriggerException e) {
            throw new XPathException(this, e.getMessage(), e);
        } finally {
            unlockDocuments();
        }
    }
    if (context.getProfiler().isEnabled()) {
        context.getProfiler().end(this, "", Sequence.EMPTY_SEQUENCE);
    }
    return Sequence.EMPTY_SEQUENCE;
}

Example 88 with Item

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

the class EXistSequence method next.

@Override
public Sequence next() throws ToolsException {
    try {
        final Item item = sequenceIterator.nextItem();
        final org.exist.xquery.value.Sequence singleton = (org.exist.xquery.value.Sequence) item;
        return new EXistSequence(singleton, context);
    } catch (final XPathException xpe) {
        throw new ToolsException(xpe.getMessage(), xpe);
    }
}