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

Example 31 with Item

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

the class AttributeConstructor method evalEnclosedExpr.

private void evalEnclosedExpr(Sequence seq, StringBuilder buf) throws XPathException {
    Item item;
    AtomicValue atomic;
    for (final SequenceIterator i = Atomize.atomize(seq).iterate(); i.hasNext(); ) {
        item = i.nextItem();
        buf.append(item.getStringValue());
        if (i.hasNext()) {
            buf.append(' ');
        }
    }
}

Example 32 with Item

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

the class DynamicFunctionCall method eval.

@Override
public Sequence eval(Sequence contextSequence, Item contextItem) throws XPathException {
    context.proceed(this);
    final Sequence funcSeq = functionExpr.eval(contextSequence, contextItem);
    if (funcSeq.getCardinality() != Cardinality.EXACTLY_ONE) {
        throw new XPathException(this, ErrorCodes.XPTY0004, "Expected exactly one item for the function to be called, got " + funcSeq.getItemCount() + ". Expression: " + ExpressionDumper.dump(functionExpr));
    }
    final Item item0 = funcSeq.itemAt(0);
    if (!Type.subTypeOf(item0.getType(), Type.FUNCTION_REFERENCE)) {
        throw new XPathException(this, ErrorCodes.XPTY0004, "Type error: expected function, got " + Type.getTypeName(item0.getType()));
    }
    final FunctionReference ref = (FunctionReference) item0;
    // if the call is a partial application, create a new function
    if (isPartial) {
        try {
            final FunctionCall call = ref.getCall();
            call.setArguments(arguments);
            final PartialFunctionApplication partialApp = new PartialFunctionApplication(context, call);
            partialApp.analyze(new AnalyzeContextInfo(cachedContextInfo));
            return partialApp.eval(contextSequence, contextItem);
        } catch (final XPathException e) {
            e.setLocation(line, column, getSource());
            throw e;
        }
    } else {
        ref.setArguments(arguments);
        // need to create a new AnalyzeContextInfo to avoid memory leak
        // cachedContextInfo will stay in memory
        ref.analyze(new AnalyzeContextInfo(cachedContextInfo));
        // Evaluate the function
        try {
            return ref.eval(contextSequence);
        } catch (XPathException e) {
            if (e.getLine() <= 0) {
                e.setLocation(getLine(), getColumn(), getSource());
            }
            throw e;
        } finally {
            ref.close();
        }
    }
}

Example 33 with Item

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

the class DynamicPIConstructor method eval.

/* (non-Javadoc)
     * @see org.exist.xquery.Expression#eval(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());
        }
    }
    if (newDocumentContext) {
        context.pushDocumentContext();
    }
    try {
        final MemTreeBuilder builder = context.getDocumentBuilder();
        context.proceed(this, builder);
        final Sequence nameSeq = name.eval(contextSequence, contextItem);
        // TODO : get rid of getLength()
        if (!nameSeq.hasOne()) {
            throw new XPathException(this, ErrorCodes.XPTY0004, "The name expression should evaluate to a single value");
        }
        final Item nameItem = nameSeq.itemAt(0);
        if (!(nameItem.getType() == Type.STRING || nameItem.getType() == Type.NCNAME || nameItem.getType() == Type.UNTYPED_ATOMIC)) {
            throw new XPathException(this, ErrorCodes.XPTY0004, "The name expression should evaluate to a " + Type.getTypeName(Type.STRING) + " or a " + Type.getTypeName(Type.NCNAME) + " or a " + Type.getTypeName(Type.UNTYPED_ATOMIC) + ". Got: " + Type.getTypeName(nameItem.getType()));
        }
        if (!XMLNames.isNCName(nameSeq.getStringValue())) {
            throw new XPathException(this, ErrorCodes.XQDY0041, nameSeq.getStringValue() + "' is not a valid processing instruction name", nameSeq);
        }
        if (nameSeq.getStringValue().equalsIgnoreCase("XML")) {
            throw new XPathException(this, ErrorCodes.XQDY0064, nameSeq.getStringValue() + "' is not a valid processing instruction name", nameSeq);
        }
        String contentString;
        final Sequence contentSeq = content.eval(contextSequence, contextItem);
        if (contentSeq.isEmpty()) {
            contentString = "";
        } else {
            final StringBuilder buf = new StringBuilder();
            for (final SequenceIterator i = Atomize.atomize(contentSeq).iterate(); i.hasNext(); ) {
                context.proceed(this, builder);
                final Item next = i.nextItem();
                if (buf.length() > 0) {
                    buf.append(' ');
                }
                buf.append(next.getStringValue());
            }
            while (buf.length() > 0 && Character.isWhitespace(buf.charAt(0))) buf.deleteCharAt(0);
            contentString = buf.toString();
        }
        if (contentString.contains("?>")) {
            throw new XPathException(this, ErrorCodes.XQDY0026, contentString + "' is not a valid processing intruction content", contentSeq);
        }
        final int nodeNo = builder.processingInstruction(nameSeq.getStringValue(), contentString);
        final Sequence result = ((DocumentImpl) builder.getDocument()).getNode(nodeNo);
        if (context.getProfiler().isEnabled()) {
            context.getProfiler().end(this, "", result);
        }
        return result;
    } finally {
        if (newDocumentContext) {
            context.popDocumentContext();
        }
    }
}

Example 34 with Item

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

the class FunAbs 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 seq = getArgument(0).eval(contextSequence, contextItem);
    if (seq.isEmpty()) {
        result = Sequence.EMPTY_SEQUENCE;
    } else {
        final Item item = seq.itemAt(0);
        NumericValue value;
        if (item instanceof NumericValue) {
            value = (NumericValue) item;
        } else {
            value = (NumericValue) item.convertTo(Type.NUMBER);
        }
        result = value.abs();
    }
    if (context.getProfiler().isEnabled()) {
        context.getProfiler().end(this, "", result);
    }
    return result;
}

Example 35 with Item

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

the class FunLocalName 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();
    }
    final Item item;
    // the context sequence
    if (getArgumentCount() > 0) {
        final Sequence seq = getArgument(0).eval(contextSequence);
        if (!seq.isEmpty()) {
            item = seq.itemAt(0);
        } else {
            item = null;
        }
    } else {
        if (contextSequence == null) {
            throw new XPathException(this, ErrorCodes.XPDY0002, "Undefined context item");
        }
        item = contextSequence.itemAt(0);
    }
    final Sequence result;
    if (item == null) {
        result = StringValue.EMPTY_STRING;
    } else {
        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();
        final String localName = n.getLocalName();
        if (localName != null) {
            result = new StringValue(localName);
        } else {
            result = StringValue.EMPTY_STRING;
        }
    }
    if (context.getProfiler().isEnabled()) {
        context.getProfiler().end(this, "", result);
    }
    return result;
}