Examples of net.sf.saxon.sort.AtomicSortComparer

net.sf.saxon.sort.AtomicSortComparer
An AtomicComparer used for comparing atomic values of arbitrary item types. It encapsulates a collator that is used when the values to be compared are strings. It also supports a separate method for testing equality of items, which can be used for data types that are not ordered. The AtomicSortComparer is identical to the GenericAtomicComparer except for its handling of NaN: it treats NaN values as lower than any other value, and as equal to each other. @author Michael H. Kay

    * used for the value lookup, and the AtomicComparer used to compare values.
    */


    public Object map(Item item, XPathContext context, Object info) throws XPathException {
        HashSet lookup = (HashSet)((Object[])info)[0];
        AtomicSortComparer comparer = (AtomicSortComparer)((Object[])info)[1];
        AtomicSortComparer.ComparisonKey key = comparer.getComparisonKey((AtomicValue)item);
        if (lookup.contains(key)) {
            return null;
        } else {
            lookup.add(key);
            return item;

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    * If this argument was not supplied, the default collation is used
    * @param context The dynamic evaluation context.
    */


    protected AtomicSortComparer getAtomicSortComparer(int arg, XPathContext context) throws XPathException {
        return new AtomicSortComparer(getCollator(arg, context, true));
    }

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Related Classes of net.sf.saxon.sort.AtomicSortComparer

net.sf.saxon.functions.DistinctValues

net.sf.saxon.Platform

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