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

Example 11 with Item

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

the class FunNamespaceURI method eval.

@Override
public Sequence eval(Sequence contextSequence, final 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();
    }
    // If we have one argument, we take it into account
    final Sequence seq;
    if (getSignature().getArgumentCount() > 0) {
        seq = getArgument(0).eval(contextSequence, contextItem);
    } else {
        // Otherwise, we take the context sequence and we iterate over it
        seq = contextSequence;
    }
    if (seq == null) {
        throw new XPathException(this, ErrorCodes.XPDY0002, "Undefined context item");
    }
    final Sequence result;
    if (seq.isEmpty()) {
        result = AnyURIValue.EMPTY_URI;
    } else {
        final Item item = seq.itemAt(0);
        if (!Type.subTypeOf(item.getType(), Type.NODE)) {
            throw new XPathException(this, ErrorCodes.XPTY0004, "Context item is not a node; got: " + Type.getTypeName(item.getType()));
        }
        // TODO : how to improve performance ?
        final Node n = ((NodeValue) item).getNode();
        String ns = n.getNamespaceURI();
        if (ns == null) {
            ns = XMLConstants.NULL_NS_URI;
        }
        result = new AnyURIValue(ns);
    }
    if (context.getProfiler().isEnabled()) {
        context.getProfiler().end(this, "", result);
    }
    return result;
}

Example 12 with Item

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

the class FunRoot method eval.

/* (non-Javadoc)
         * @see org.exist.xquery.Expression#eval(org.exist.dom.persistent.DocumentSet, 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());
        }
    }
    Sequence seq;
    Sequence result;
    Item item;
    if (contextItem != null) {
        contextSequence = contextItem.toSequence();
    }
    if (contextSequence == null || contextSequence.isEmpty()) {
        result = Sequence.EMPTY_SEQUENCE;
    }
    // If we have one argumment, we take it into account
    if (getSignature().getArgumentCount() > 0) {
        seq = getArgument(0).eval(contextSequence, contextItem);
    } else // Otherwise, we take the context sequence and we iterate over it
    {
        seq = contextSequence;
    }
    if (seq == null) {
        throw new XPathException(this, ErrorCodes.XPDY0002, "Undefined context item");
    }
    if (seq.isPersistentSet()) {
        result = new ExtArrayNodeSet(seq.getItemCount());
    } else {
        result = new ValueSequence(seq.getItemCount());
    }
    for (final SequenceIterator i = seq.iterate(); i.hasNext(); ) {
        item = i.nextItem();
        if (!Type.subTypeOf(item.getType(), Type.NODE)) {
            throw new XPathException(this, ErrorCodes.XPTY0004, "Item is not a node; got '" + item + "'", seq);
        }
        final Sequence s = item.toSequence();
        if (s.isPersistentSet()) {
            final NodeProxy p = s.toNodeSet().get(0);
            result.add(new NodeProxy(p.getOwnerDocument()));
        } else {
            if (seq.hasOne() && item.getType() == Type.ATTRIBUTE) {
                result.add(item);
            } else if (item.getType() == Type.DOCUMENT) {
                result.add((DocumentImpl) item);
            } else {
                result.add(((NodeImpl) item).getOwnerDocument());
            }
        }
    }
    if (context.getProfiler().isEnabled()) {
        context.getProfiler().end(this, "", result);
    }
    return result;
}

Example 13 with Item

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

the class FunRoundHalfToEven method eval.

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());
        }
    }
    Sequence result;
    IntegerValue precision = null;
    final Sequence seq = getArgument(0).eval(contextSequence, contextItem);
    if (seq.isEmpty()) {
        result = Sequence.EMPTY_SEQUENCE;
    } else {
        if (contextItem != null) {
            contextSequence = contextItem.toSequence();
        }
        if (getSignature().getArgumentCount() > 1) {
            precision = (IntegerValue) getArgument(1).eval(contextSequence, contextItem).itemAt(0).convertTo(Type.INTEGER);
        }
        final Item item = seq.itemAt(0);
        NumericValue value;
        if (item instanceof NumericValue) {
            value = (NumericValue) item;
        } else {
            value = (NumericValue) item.convertTo(Type.NUMBER);
        }
        result = value.round(precision);
    }
    if (context.getProfiler().isEnabled()) {
        context.getProfiler().end(this, "", result);
    }
    return result;
}

Example 14 with Item

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

the class XUpdateProcessor method startElement.

@Override
public void startElement(String namespaceURI, String localName, String qName, Attributes atts) throws SAXException {
    // save accumulated character content
    if (inModification && charBuf.length() > 0) {
        // String normalized = charBuf.toString();
        final String normalized = preserveWhitespace ? charBuf.toString() : charBuf.toString().trim();
        if (!normalized.isEmpty()) {
            final Text text = doc.createTextNode(charBuf.toString());
            final Element last = stack.peek();
            if (last == null) {
                // LOG.debug("appending text to fragment: " + text.getData());
                contents.add(text);
            } else {
                last.appendChild(text);
            }
        }
        charBuf.setLength(0);
    }
    if (namespaceURI.equals(XUPDATE_NS)) {
        String select = null;
        switch(localName) {
            case MODIFICATIONS:
                startModifications(atts);
                return;
            case VARIABLE:
                // variable declaration
                startVariableDecl(atts);
                return;
            case IF:
                if (inModification) {
                    throw new SAXException("xupdate:if is not allowed inside a modification");
                }
                select = atts.getValue("test");
                final Conditional cond = new Conditional(broker, documentSet, select, namespaces, variables);
                conditionals.push(cond);
                return;
            case VALUE_OF:
                if (!inModification) {
                    throw new SAXException("xupdate:value-of is not allowed outside a modification");
                }
                break;
            case APPEND:
            case INSERT_BEFORE:
            case INSERT_AFTER:
            case REMOVE:
            case RENAME:
            case UPDATE:
            case REPLACE:
                if (inModification) {
                    throw new SAXException("nested modifications are not allowed");
                }
                select = atts.getValue("select");
                if (select == null) {
                    throw new SAXException(localName + " requires a select attribute");
                }
                doc = builder.newDocument();
                contents = new NodeListImpl();
                inModification = true;
                break;
            case ELEMENT:
            case ATTRIBUTE:
            case TEXT:
            case PROCESSING_INSTRUCTION:
            case COMMENT:
                if (!inModification) {
                    throw new SAXException("creation elements are only allowed inside " + "a modification");
                }
                charBuf.setLength(0);
                break;
            default:
                throw new SAXException("Unknown XUpdate element: " + qName);
        }
        // start a new modification section
        switch(localName) {
            case APPEND:
                final String child = atts.getValue("child");
                modification = new Append(broker, documentSet, select, child, namespaces, variables);
                break;
            case UPDATE:
                modification = new Update(broker, documentSet, select, namespaces, variables);
                break;
            case INSERT_BEFORE:
                modification = new Insert(broker, documentSet, select, Insert.INSERT_BEFORE, namespaces, variables);
                break;
            case INSERT_AFTER:
                modification = new Insert(broker, documentSet, select, Insert.INSERT_AFTER, namespaces, variables);
                break;
            case REMOVE:
                modification = new Remove(broker, documentSet, select, namespaces, variables);
                break;
            case RENAME:
                modification = new Rename(broker, documentSet, select, namespaces, variables);
                break;
            case REPLACE:
                modification = new Replace(broker, documentSet, select, namespaces, variables);
                break;
            // process commands for node creation
            case ELEMENT:
                {
                    String name = atts.getValue("name");
                    if (name == null) {
                        throw new SAXException("element requires a name attribute");
                    }
                    final int p = name.indexOf(':');
                    String namespace = null;
                    String prefix = "";
                    if (p != Constants.STRING_NOT_FOUND) {
                        prefix = name.substring(0, p);
                        if (name.length() == p + 1) {
                            throw new SAXException("illegal prefix in qname: " + name);
                        }
                        name = name.substring(p + 1);
                        namespace = atts.getValue("namespace");
                        if (namespace == null) {
                            namespace = namespaces.get(prefix);
                        }
                        if (namespace == null) {
                            throw new SAXException("no namespace defined for prefix " + prefix);
                        }
                    }
                    Element elem;
                    if (namespace != null && !namespace.isEmpty()) {
                        elem = doc.createElementNS(namespace, name);
                        elem.setPrefix(prefix);
                    } else {
                        elem = doc.createElement(name);
                    }
                    final Element last = stack.peek();
                    if (last == null) {
                        contents.add(elem);
                    } else {
                        last.appendChild(elem);
                    }
                    stack.push(elem);
                    this.setWhitespaceHandling(elem);
                    break;
                }
            case ATTRIBUTE:
                {
                    final String name = atts.getValue("name");
                    if (name == null) {
                        throw new SAXException("attribute requires a name attribute");
                    }
                    final int p = name.indexOf(':');
                    String namespace = null;
                    if (p != Constants.STRING_NOT_FOUND) {
                        final String prefix = name.substring(0, p);
                        if (name.length() == p + 1) {
                            throw new SAXException("illegal prefix in qname: " + name);
                        }
                        namespace = atts.getValue("namespace");
                        if (namespace == null) {
                            namespace = namespaces.get(prefix);
                        }
                        if (namespace == null) {
                            throw new SAXException("no namespace defined for prefix " + prefix);
                        }
                    }
                    Attr attrib = namespace != null && !namespace.isEmpty() ? doc.createAttributeNS(namespace, name) : doc.createAttribute(name);
                    if (stack.isEmpty()) {
                        for (int i = 0; i < contents.getLength(); i++) {
                            final Node n = contents.item(i);
                            String ns = n.getNamespaceURI();
                            final String nname = ns == null ? n.getNodeName() : n.getLocalName();
                            if (ns == null) {
                                ns = XMLConstants.NULL_NS_URI;
                            }
                            // check for duplicate attributes
                            if (n.getNodeType() == Node.ATTRIBUTE_NODE && nname.equals(name) && ns.equals(namespace)) {
                                throw new SAXException("The attribute " + attrib.getNodeName() + " cannot be specified twice");
                            }
                        }
                        contents.add(attrib);
                    } else {
                        final Element last = stack.peek();
                        if (namespace != null && last.hasAttributeNS(namespace, name) || namespace == null && last.hasAttribute(name)) {
                            throw new SAXException("The attribute " + attrib.getNodeName() + " cannot be specified " + "twice on the same element");
                        }
                        if (namespace != null) {
                            last.setAttributeNodeNS(attrib);
                        } else {
                            last.setAttributeNode(attrib);
                        }
                    }
                    inAttribute = true;
                    currentNode = attrib;
                    // process value-of
                    break;
                }
            case VALUE_OF:
                select = atts.getValue("select");
                if (select == null) {
                    throw new SAXException("value-of requires a select attribute");
                }
                final Sequence seq = processQuery(select);
                if (LOG.isDebugEnabled()) {
                    LOG.debug("Found {} items for value-of", seq.getItemCount());
                }
                Item item;
                try {
                    for (final SequenceIterator i = seq.iterate(); i.hasNext(); ) {
                        item = i.nextItem();
                        if (Type.subTypeOf(item.getType(), Type.NODE)) {
                            final Node node = NodeSetHelper.copyNode(doc, ((NodeValue) item).getNode());
                            final Element last = stack.peek();
                            if (last == null) {
                                contents.add(node);
                            } else {
                                last.appendChild(node);
                            }
                        } else {
                            final String value = item.getStringValue();
                            characters(value.toCharArray(), 0, value.length());
                        }
                    }
                } catch (final XPathException e) {
                    throw new SAXException(e.getMessage(), e);
                }
                break;
        }
    } else if (inModification) {
        final Element elem = namespaceURI != null && !namespaceURI.isEmpty() ? doc.createElementNS(namespaceURI, qName) : doc.createElement(qName);
        Attr a;
        for (int i = 0; i < atts.getLength(); i++) {
            final String name = atts.getQName(i);
            final String nsURI = atts.getURI(i);
            if (name.startsWith("xmlns")) {
            // Why are these showing up? They are supposed to be stripped out?
            } else {
                a = nsURI != null ? doc.createAttributeNS(nsURI, name) : doc.createAttribute(name);
                a.setValue(atts.getValue(i));
                if (nsURI != null) {
                    elem.setAttributeNodeNS(a);
                } else {
                    elem.setAttributeNode(a);
                }
            }
        }
        final Element last = stack.peek();
        if (last == null) {
            contents.add(elem);
        } else {
            last.appendChild(elem);
        }
        stack.push(elem);
        this.setWhitespaceHandling(elem);
    }
}

Example 15 with Item

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

the class IndexerTest2 method executeQuery.

private String executeQuery() throws EXistException, PermissionDeniedException, SAXException, XPathException, IOException {
    final BrokerPool pool = existEmbeddedServer.getBrokerPool();
    try (final DBBroker broker = pool.get(Optional.of(pool.getSecurityManager().getSystemSubject()));
        final StringWriter out = new StringWriter()) {
        final XQuery xquery = broker.getBrokerPool().getXQueryService();
        final Sequence result = xquery.execute(broker, XQUERY, null);
        final Properties props = new Properties();
        props.setProperty(OutputKeys.INDENT, "yes");
        final SAXSerializer serializer = new SAXSerializer(out, props);
        serializer.startDocument();
        for (final SequenceIterator i = result.iterate(); i.hasNext(); ) {
            final Item next = i.nextItem();
            next.toSAX(broker, serializer, props);
        }
        serializer.endDocument();
        return out.toString();
    }
}