Examples with Expression org.exist.xquery.Expression used on opensource projects

Example 1 with Expression

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

the class FunSubstring method eval.

public Sequence eval(Sequence contextSequence, Item contextItem) throws XPathException {
    // start profiler
    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());
        }
    }
    // get arguments
    final Expression argSourceString = getArgument(0);
    final Expression argStartingLoc = getArgument(1);
    Expression argLength = null;
    // get the context sequence
    if (contextItem != null) {
        contextSequence = contextItem.toSequence();
    }
    Sequence result;
    final Sequence seqSourceString = argSourceString.eval(contextSequence);
    // If the value of $sourceString is the empty sequence return EMPTY_STRING, there must be a string to operate on!
    if (seqSourceString.isEmpty()) {
        result = StringValue.EMPTY_STRING;
    } else {
        // get the string to substring
        final String sourceString = seqSourceString.getStringValue();
        // check for a valid start position for the substring
        final NumericValue startingLoc = ((NumericValue) (argStartingLoc.eval(contextSequence).itemAt(0).convertTo(Type.NUMBER))).round();
        if (!validStartPosition(startingLoc, sourceString.length())) {
            // invalid start position
            result = StringValue.EMPTY_STRING;
        } else {
            // are there 2 or 3 arguments to this function?
            if (getArgumentCount() > 2) {
                argLength = getArgument(2);
                final NumericValue length = ((NumericValue) (argLength.eval(contextSequence).itemAt(0).convertTo(Type.NUMBER))).round();
                // Relocate length to position according to spec:
                // fn:round($startingLoc) <=
                // $p
                // < fn:round($startingLoc) + fn:round($length)
                NumericValue endingLoc;
                if (!length.isInfinite()) {
                    endingLoc = (NumericValue) new IntegerValue(startingLoc.getInt() + length.getInt());
                } else {
                    endingLoc = length;
                }
                // check for a valid end position for the substring
                if (!validEndPosition(endingLoc, startingLoc)) {
                    // invalid length
                    result = StringValue.EMPTY_STRING;
                } else {
                    if (endingLoc.getInt() > sourceString.length() || endingLoc.isInfinite()) {
                        // fallback to fn:substring(string, start)
                        result = substring(sourceString, startingLoc);
                    } else {
                        // three arguments fn:substring(string, start, end)
                        result = substring(sourceString, startingLoc, endingLoc);
                    }
                }
            } else {
                // No length argument
                // two arguments fn:substring(string, start)
                result = substring(sourceString, startingLoc);
            }
        }
    }
    // end profiler
    if (context.getProfiler().isEnabled()) {
        context.getProfiler().end(this, "", result);
    }
    return result;
}

Example 2 with Expression

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

the class FunReplace method setArguments.

@Override
public void setArguments(List<Expression> arguments) {
    steps.clear();
    Expression arg = arguments.get(0);
    arg = new DynamicCardinalityCheck(context, Cardinality.ZERO_OR_ONE, arg, new Error(Error.FUNC_PARAM_CARDINALITY, "1", getSignature()));
    if (!Type.subTypeOf(arg.returnsType(), Type.ATOMIC)) {
        arg = new Atomize(context, arg);
    }
    steps.add(arg);
    arg = arguments.get(1);
    arg = new DynamicCardinalityCheck(context, Cardinality.EXACTLY_ONE, arg, new Error(Error.FUNC_PARAM_CARDINALITY, "2", getSignature()));
    if (!Type.subTypeOf(arg.returnsType(), Type.ATOMIC)) {
        arg = new Atomize(context, arg);
    }
    steps.add(arg);
    arg = arguments.get(2);
    arg = new DynamicCardinalityCheck(context, Cardinality.EXACTLY_ONE, arg, new Error(Error.FUNC_PARAM_CARDINALITY, "3", getSignature()));
    if (!Type.subTypeOf(arg.returnsType(), Type.ATOMIC)) {
        arg = new Atomize(context, arg);
    }
    steps.add(arg);
    if (arguments.size() == 4) {
        arg = arguments.get(3);
        arg = new DynamicCardinalityCheck(context, Cardinality.EXACTLY_ONE, arg, new Error(Error.FUNC_PARAM_CARDINALITY, "4", getSignature()));
        if (!Type.subTypeOf(arg.returnsType(), Type.ATOMIC)) {
            arg = new Atomize(context, arg);
        }
        steps.add(arg);
    }
}

Example 3 with Expression

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

the class CallFunction method eval.

/* (non-Javadoc)
     * @see org.exist.xquery.BasicFunction#eval(org.exist.xquery.value.Sequence[], org.exist.xquery.value.Sequence)
     */
public Sequence eval(Sequence contextSequence, Item contextItem) throws XPathException {
    final Sequence arg0 = getArgument(0).eval(contextSequence, contextItem);
    if (arg0.getCardinality() != Cardinality.EXACTLY_ONE) {
        throw new XPathException(this, "Expected exactly one item for first argument");
    }
    final Item item0 = arg0.itemAt(0);
    if (item0.getType() != Type.FUNCTION_REFERENCE) {
        throw new XPathException(this, "Type error: expected function, got " + Type.getTypeName(item0.getType()));
    }
    try (final FunctionReference ref = (FunctionReference) item0) {
        // pass the remaining parameters to the function call
        final List<Expression> params = new ArrayList<>(getArgumentCount() - 1);
        for (int i = 1; i < getArgumentCount(); i++) {
            params.add(getArgument(i));
        }
        ref.setArguments(params);
        ref.analyze(new AnalyzeContextInfo(this, 0));
        // Evaluate the function
        return ref.eval(contextSequence);
    }
}

Example 4 with Expression

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

the class OrderedValueSequenceTest method mockOrderedValueSequence.

private static OrderedValueSequence mockOrderedValueSequence(final int size) throws XPathException {
    final Expression mockSortExpr = createMock(Expression.class);
    expect(mockSortExpr.eval(null)).andReturn(Sequence.EMPTY_SEQUENCE).anyTimes();
    replay(mockSortExpr);
    final OrderedValueSequence orderedValueSequence = new OrderedValueSequence(new OrderSpec[] { new OrderSpec(null, mockSortExpr) }, size);
    for (int i = 0; i < size; i++) {
        final Item item = createMock(Item.class);
        expect(item.getType()).andReturn(Type.ANY_TYPE);
        replay(item);
        orderedValueSequence.add(item);
    }
    return orderedValueSequence;
}

Example 5 with Expression

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

the class StackGet method stackToString.

private StringBuilder stackToString(int index) {
    StringBuilder result = new StringBuilder();
    if (stacks == null || stacks.size() == 0)
        return result;
    Expression expr = stacks.get(index);
    if (expr == null)
        return result;
    int level = stacks.size() - index - 1;
    result.append("<stack level=\"");
    result.append(String.valueOf(level));
    result.append("\" lineno=\"");
    result.append(expr.getLine());
    result.append("\" type=\"file\" filename=\"");
    result.append(getFileuri(expr.getSource()));
    result.append("\" ");
    // +
    // "where=\"\" " +
    result.append("cmdbegin=\"");
    result.append(expr.getLine());
    result.append(":");
    result.append(expr.getColumn());
    result.append("\"  />");
    // "cmdend=\""+(expr.getLine())+":"+(expr.getColumn()+1)+"\"/>";
    return result;
}