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

Example 36 with Item

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

the class FunName 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 = StringValue.EMPTY_STRING;
    } else {
        final Item item = seq.itemAt(0);
        if (!Type.subTypeOf(item.getType(), Type.NODE)) {
            throw new XPathException(this, ErrorCodes.XPTY0004, "item is not a node; got '" + Type.getTypeName(item.getType()) + "'");
        }
        // TODO : how to improve performance ?
        final Node n = ((NodeValue) item).getNode();
        if (n instanceof INode) {
            result = new StringValue(((INode) n).getQName().getStringValue());
        } else {
            result = StringValue.EMPTY_STRING;
        }
    }
    if (context.getProfiler().isEnabled()) {
        context.getProfiler().end(this, "", result);
    }
    return result;
}

Example 37 with Item

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

the class FunAvg 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 result;
    final Sequence inner = getArgument(0).eval(contextSequence, contextItem);
    if (inner.isEmpty()) {
        result = Sequence.EMPTY_SEQUENCE;
    } else {
        final SequenceIterator iter = inner.iterate();
        Item item = iter.nextItem();
        AtomicValue value = item.atomize();
        // Any values of type xdt:untypedAtomic are cast to xs:double
        if (value.getType() == Type.UNTYPED_ATOMIC) {
            value = value.convertTo(Type.DOUBLE);
        }
        if (!(value instanceof ComputableValue)) {
            throw new XPathException(this, ErrorCodes.FORG0006, Type.getTypeName(value.getType()) + "(" + value + ") " + "can not be an operand in a sum", value);
        }
        // Set the first value
        ComputableValue sum = (ComputableValue) value;
        while (iter.hasNext()) {
            item = iter.nextItem();
            value = item.atomize();
            // Any value of type xdt:untypedAtomic are cast to xs:double
            if (value.getType() == Type.UNTYPED_ATOMIC) {
                value = value.convertTo(Type.DOUBLE);
            }
            if (!(value instanceof ComputableValue)) {
                throw new XPathException(this, ErrorCodes.FORG0006, "" + Type.getTypeName(value.getType()) + "(" + value + ") can not be an operand in a sum", value);
            }
            if (Type.subTypeOfUnion(value.getType(), Type.NUMBER)) {
                if (((NumericValue) value).isInfinite()) {
                    gotInfinity = true;
                }
                if (((NumericValue) value).isNaN()) {
                    sum = DoubleValue.NaN;
                    break;
                }
            }
            try {
                sum = (ComputableValue) sum.promote(value);
                // Aggregate next values
                sum = sum.plus((ComputableValue) value);
            } catch (final XPathException e) {
                throw new XPathException(this, ErrorCodes.FORG0006, e.getMessage());
            }
        }
        result = sum.div(new IntegerValue(inner.getItemCount()));
    }
    if (!gotInfinity) {
        if (Type.subTypeOfUnion(result.getItemType(), Type.NUMBER) && ((NumericValue) result).isInfinite()) {
        // Throw an overflow exception here since we get an infinity
        // whereas is hasn't been provided by the sequence
        // TODO ? -pb
        }
    }
    if (context.getProfiler().isEnabled()) {
        context.getProfiler().end(this, "", result);
    }
    return result;
}

Example 38 with Item

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

the class FunDistinctValues method eval.

/* (non-Javadoc)
     * @see org.exist.xquery.Expression#eval(org.exist.xquery.StaticContext, 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());
        }
    }
    final Sequence seq = getArgument(0).eval(contextSequence, contextItem);
    final Collator collator = getCollator(contextSequence, contextItem, 2);
    final TreeSet<AtomicValue> set = new TreeSet<>(new ValueComparator(collator));
    final ValueSequence result = new ValueSequence();
    Item item;
    AtomicValue value;
    boolean hasAlreadyNaN = false;
    for (final SequenceIterator i = seq.iterate(); i.hasNext(); ) {
        item = i.nextItem();
        value = item.atomize();
        if (!set.contains(value)) {
            if (Type.subTypeOfUnion(value.getType(), Type.NUMBER)) {
                if (((NumericValue) value).isNaN()) {
                    // contains multiple NaN values a single NaN is returned.
                    if (!hasAlreadyNaN) {
                        set.add(value);
                        result.add(value);
                        hasAlreadyNaN = true;
                    }
                } else {
                    set.add(value);
                    result.add(value);
                }
            } else {
                set.add(value);
                result.add(value);
            }
        }
    }
    if (context.getProfiler().isEnabled()) {
        context.getProfiler().end(this, "", result);
    }
    return result;
}

Example 39 with Item

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

the class BasicNodeSetTest method executeQuery.

private static Sequence executeQuery(final DBBroker broker, final String query, final int expected, final String expectedResult) throws XPathException, SAXException, PermissionDeniedException {
    final XQuery xquery = broker.getBrokerPool().getXQueryService();
    final Sequence seq = xquery.execute(broker, query, null);
    assertEquals(expected, seq.getItemCount());
    if (expectedResult != null) {
        final Item item = seq.itemAt(0);
        final String value = serialize(broker, item);
        assertEquals(expectedResult, value);
    }
    return seq;
}

Example 40 with Item

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

the class RecoveryTest method verify.

private void verify(final BrokerPool pool) throws EXistException, PermissionDeniedException, SAXException, XPathException, IOException, BTreeException, LockException {
    try (final DBBroker broker = pool.get(Optional.of(pool.getSecurityManager().getSystemSubject()))) {
        final Serializer serializer = broker.borrowSerializer();
        try {
            try (final LockedDocument lockedDoc = broker.getXMLResource(XmldbURI.ROOT_COLLECTION_URI.append("test/test2/hamlet.xml"), LockMode.READ_LOCK)) {
                assertNotNull("Document '" + XmldbURI.ROOT_COLLECTION + "/test/test2/hamlet.xml' should not be null", lockedDoc);
                final String data = serializer.serialize(lockedDoc.getDocument());
                assertNotNull(data);
            }
            try (final LockedDocument lockedDoc = broker.getXMLResource(XmldbURI.ROOT_COLLECTION_URI.append("test/test2/test_string.xml"), LockMode.READ_LOCK)) {
                assertNotNull("Document '" + XmldbURI.ROOT_COLLECTION + "/test/test2/test_string.xml' should not be null", lockedDoc);
                final String data = serializer.serialize(lockedDoc.getDocument());
                assertNotNull(data);
            }
            final String lastSampleName = SAMPLES.getShakespeareXmlSampleNames()[SAMPLES.getShakespeareXmlSampleNames().length - 1];
            try (final LockedDocument lockedDoc = broker.getXMLResource(TestConstants.TEST_COLLECTION_URI2.append(lastSampleName), LockMode.READ_LOCK)) {
                assertNull("Document '" + XmldbURI.ROOT_COLLECTION + "/test/test2/'" + lastSampleName + " should not exist anymore", lockedDoc);
            }
            final XQuery xquery = pool.getXQueryService();
            assertNotNull(xquery);
            final Sequence seq = xquery.execute(broker, "//SPEECH[contains(LINE, 'king')]", null);
            assertNotNull(seq);
            for (final SequenceIterator i = seq.iterate(); i.hasNext(); ) {
                final Item next = i.nextItem();
                final String value = serializer.serialize((NodeValue) next);
            }
        } finally {
            broker.returnSerializer(serializer);
        }
        try (final LockedDocument lockedBinDoc = broker.getXMLResource(TestConstants.TEST_COLLECTION_URI2.append(TestConstants.TEST_BINARY_URI), LockMode.READ_LOCK)) {
            assertNotNull("Binary document is null", lockedBinDoc);
            final BinaryDocument binDoc = (BinaryDocument) lockedBinDoc.getDocument();
            try (final InputStream is = broker.getBinaryResource(binDoc)) {
                final byte[] bdata = new byte[(int) binDoc.getContentLength()];
                is.read(bdata);
                final String data = new String(bdata);
                assertNotNull(data);
            }
        }
        final DOMFile domDb = ((NativeBroker) broker).getDOMFile();
        assertNotNull(domDb);
        try (final Writer writer = new StringWriter()) {
            domDb.dump(writer);
        }
        final TransactionManager transact = pool.getTransactionManager();
        try (final Txn transaction = transact.beginTransaction()) {
            try (final Collection root = broker.openCollection(TestConstants.TEST_COLLECTION_URI, LockMode.WRITE_LOCK)) {
                assertNotNull(root);
                transaction.acquireCollectionLock(() -> broker.getBrokerPool().getLockManager().acquireCollectionWriteLock(root.getURI()));
                broker.removeCollection(transaction, root);
            }
            transact.commit(transaction);
        }
    }
}