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

Example 51 with NodeValue

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

the class Modification method selectAndLock.

/**
 * Acquire a lock on all documents processed by this modification.
 * We have to avoid that node positions change during the
 * operation.
 *
 * @param nodes sequence containing nodes from documents to lock
 * @param transaction current transaction
 * @return array of nodes for which lock was acquired
 *
 * @throws LockException in case locking failed
 * @throws TriggerException in case of error thrown by triggers
 * @throws XPathException in case of dynamic error
 */
protected StoredNode[] selectAndLock(Txn transaction, Sequence nodes) throws LockException, XPathException, TriggerException {
    final java.util.concurrent.locks.Lock globalLock = context.getBroker().getBrokerPool().getGlobalUpdateLock();
    globalLock.lock();
    try {
        final DocumentSet lockedDocuments = nodes.getDocumentSet();
        // acquire a lock on all documents
        // we have to avoid that node positions change
        // during the modification
        lockedDocumentsLocks = lockedDocuments.lock(context.getBroker(), true);
        final StoredNode[] ql = new StoredNode[nodes.getItemCount()];
        for (int i = 0; i < ql.length; i++) {
            final Item item = nodes.itemAt(i);
            if (!Type.subTypeOf(item.getType(), Type.NODE)) {
                throw new XPathException(this, "XQuery update expressions can only be applied to nodes. Got: " + item.getStringValue());
            }
            final NodeValue nv = (NodeValue) item;
            if (nv.getImplementationType() == NodeValue.IN_MEMORY_NODE) {
                throw new XPathException(this, "XQuery update expressions can not be applied to in-memory nodes.");
            }
            final Node n = nv.getNode();
            if (n.getNodeType() == Node.DOCUMENT_NODE) {
                throw new XPathException(this, "Updating the document object is not allowed.");
            }
            ql[i] = (StoredNode) n;
            final DocumentImpl doc = ql[i].getOwnerDocument();
            // prepare Trigger
            prepareTrigger(transaction, doc);
        }
        return ql;
    } finally {
        globalLock.unlock();
    }
}

Example 52 with NodeValue

use of org.exist.xquery.value.NodeValue 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;
}