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

Example 56 with Item

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

the class FunSort method eval.

@Override
public Sequence eval(Sequence[] args, Sequence contextSequence) throws XPathException {
    Sequence seq = args[0];
    Collator collator = collator(args, 1);
    ArrayList<Sequence> keys = new ArrayList<>(seq.getItemCount());
    try (FunctionReference ref = function(args, 2)) {
        final Sequence[] refArgs = new Sequence[1];
        Item item;
        Sequence value;
        for (final SequenceIterator i = seq.iterate(); i.hasNext(); ) {
            item = i.nextItem();
            if (ref != null) {
                refArgs[0] = item.toSequence();
                value = ref.evalFunction(null, null, refArgs);
            } else {
                value = item.toSequence();
            }
            keys.add(Atomize.atomize(value));
        }
    }
    return sort(seq, keys, collator);
}

Example 57 with Item

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

the class FunStringJoin method eval.

/* (non-Javadoc)
	 * @see org.exist.xquery.BasicFunction#eval(org.exist.xquery.value.Sequence[], org.exist.xquery.value.Sequence)
	 */
public Sequence eval(Sequence[] args, Sequence contextSequence) 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);
        }
    }
    String sep = null;
    if (getArgumentCount() == 2) {
        sep = args[1].getStringValue();
        if (sep.isEmpty()) {
            sep = null;
        }
    }
    final StringBuilder out = new StringBuilder();
    Item next;
    boolean gotOne = false;
    for (final SequenceIterator i = args[0].iterate(); i.hasNext(); ) {
        next = i.nextItem();
        if (gotOne && sep != null) {
            out.append(sep);
        }
        out.append(next.getStringValue());
        gotOne = true;
    }
    final Sequence result = new StringValue(out.toString());
    if (context.getProfiler().isEnabled()) {
        context.getProfiler().end(this, "", result);
    }
    return result;
}

Example 58 with Item

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

the class FunSum 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;
    final Sequence inner = getArgument(0).eval(contextSequence, contextItem);
    if (inner.isEmpty()) {
        // If $zero is not specified, then the value returned for an empty sequence is the xs:integer value 0
        Sequence zero = IntegerValue.ZERO;
        if (getSignature().getArgumentCount() == 2) {
            zero = getArgument(1).eval(contextSequence, contextItem);
        }
        result = zero;
    } else {
        final SequenceIterator iter = inner.iterate();
        Item item = iter.nextItem();
        AtomicValue value = item.atomize();
        value = check(value, null);
        // Set the first value
        ComputableValue sum = (ComputableValue) value;
        while (iter.hasNext()) {
            item = iter.nextItem();
            value = item.atomize();
            value = check(value, sum);
            if (Type.subTypeOfUnion(value.getType(), Type.NUMBER)) {
                if (((NumericValue) value).isInfinite()) {
                    gotInfinity = true;
                }
                if (((NumericValue) value).isNaN()) {
                    sum = DoubleValue.NaN;
                    break;
                }
            }
            sum = (ComputableValue) sum.promote(value);
            // Aggregate next values
            sum = sum.plus((ComputableValue) value);
        }
        result = sum;
    }
    if (!gotInfinity) {
        if (Type.subTypeOfUnion(result.getItemType(), Type.NUMBER) && ((NumericValue) result).isInfinite()) {
        // Throw an overflow eception here since we get an infinity
        // whereas is hasn't been provided by the sequence
        }
    }
    if (context.getProfiler().isEnabled()) {
        context.getProfiler().end(this, "", result);
    }
    return result;
}

Example 59 with Item

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

the class FunMax 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 arg = getArgument(0).eval(contextSequence, contextItem);
    if (arg.isEmpty()) {
        result = Sequence.EMPTY_SEQUENCE;
    } else {
        boolean computableProcessing = false;
        // TODO : test if a range index is defined *iff* it is compatible with the collator
        final Collator collator = getCollator(contextSequence, contextItem, 2);
        final SequenceIterator iter = arg.unorderedIterator();
        AtomicValue max = null;
        while (iter.hasNext()) {
            final Item item = iter.nextItem();
            if (item instanceof QNameValue) {
                throw new XPathException(this, ErrorCodes.FORG0006, "Cannot compare " + Type.getTypeName(item.getType()), arg);
            }
            AtomicValue value = item.atomize();
            // Duration values must either all be xs:yearMonthDuration values or must all be xs:dayTimeDuration values.
            if (Type.subTypeOf(value.getType(), Type.DURATION)) {
                value = ((DurationValue) value).wrap();
                if (value.getType() == Type.YEAR_MONTH_DURATION) {
                    if (max != null && max.getType() != Type.YEAR_MONTH_DURATION) {
                        throw new XPathException(this, ErrorCodes.FORG0006, "Cannot compare " + Type.getTypeName(max.getType()) + " and " + Type.getTypeName(value.getType()), value);
                    }
                } else if (value.getType() == Type.DAY_TIME_DURATION) {
                    if (max != null && max.getType() != Type.DAY_TIME_DURATION) {
                        throw new XPathException(this, ErrorCodes.FORG0006, "Cannot compare " + Type.getTypeName(max.getType()) + " and " + Type.getTypeName(value.getType()), value);
                    }
                } else {
                    throw new XPathException(this, ErrorCodes.FORG0006, "Cannot compare " + Type.getTypeName(value.getType()), value);
                }
            // Any value of type xdt:untypedAtomic is cast to xs:double
            } else if (value.getType() == Type.UNTYPED_ATOMIC) {
                value = value.convertTo(Type.DOUBLE);
            }
            if (max == null) {
                max = value;
            } else {
                if (Type.getCommonSuperType(max.getType(), value.getType()) == Type.ATOMIC) {
                    throw new XPathException(this, ErrorCodes.FORG0006, "Cannot compare " + Type.getTypeName(max.getType()) + " and " + Type.getTypeName(value.getType()), max);
                }
                // Any value of type xdt:untypedAtomic is cast to xs:double
                if (value.getType() == Type.UNTYPED_ATOMIC) {
                    value = value.convertTo(Type.DOUBLE);
                }
                // Numeric tests
                if (Type.subTypeOfUnion(value.getType(), Type.NUMBER)) {
                    // Don't mix comparisons
                    if (!Type.subTypeOfUnion(max.getType(), Type.NUMBER)) {
                        throw new XPathException(this, ErrorCodes.FORG0006, "Cannot compare " + Type.getTypeName(max.getType()) + " and " + Type.getTypeName(value.getType()), max);
                    }
                    if (((NumericValue) value).isNaN()) {
                        // Type NaN correctly
                        value = value.promote(max);
                        if (value.getType() == Type.FLOAT) {
                            max = FloatValue.NaN;
                        } else {
                            max = DoubleValue.NaN;
                        }
                        // although result will be NaN, we need to continue on order to type correctly
                        continue;
                    } else {
                        max = max.promote(value);
                    }
                }
                // Ugly test
                if (max instanceof ComputableValue && value instanceof ComputableValue) {
                    // Type value correctly
                    value = value.promote(max);
                    max = (ComputableValue) max.max(collator, value);
                    computableProcessing = true;
                } else {
                    if (computableProcessing) {
                        throw new XPathException(this, ErrorCodes.FORG0006, "Cannot compare " + Type.getTypeName(max.getType()) + " and " + Type.getTypeName(value.getType()), max);
                    }
                    if (Collations.compare(collator, value.getStringValue(), max.getStringValue()) > 0) {
                        max = value;
                    }
                }
            }
        }
        result = max;
    }
    if (context.getProfiler().isEnabled()) {
        context.getProfiler().end(this, "", result);
    }
    return result;
}

Example 60 with Item

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

the class FunNodeName 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 = Sequence.EMPTY_SEQUENCE;
    } 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();
        // Returns an expanded-QName for node kinds that can have names.
        if (n instanceof INode) {
            final QName qn = ((INode) n).getQName();
            if (qn.equals(QName.EMPTY_QNAME)) {
                result = Sequence.EMPTY_SEQUENCE;
            } else {
                result = new QNameValue(context, qn);
            }
        // For other kinds of nodes it returns the empty sequence.
        } else {
            result = Sequence.EMPTY_SEQUENCE;
        }
    }
    if (context.getProfiler().isEnabled()) {
        context.getProfiler().end(this, "", result);
    }
    return result;
}