Examples with CASFilter org.sirix.index.cas.CASFilter used on opensource projects

Example 1 with CASFilter

use of org.sirix.index.cas.CASFilter in project sirix by sirixdb.

the class ScanCASIndex method execute.

@Override
public Sequence execute(StaticContext sctx, QueryContext ctx, Sequence[] args) throws QueryException {
    final DBNode doc = (DBNode) args[0];
    final XdmNodeReadTrx rtx = doc.getTrx();
    final IndexController controller = rtx.getResourceManager().getRtxIndexController(rtx.getRevisionNumber());
    if (controller == null) {
        throw new QueryException(new QNm("Document not found: " + ((Str) args[1]).stringValue()));
    }
    final int idx = FunUtil.getInt(args, 1, "$idx-no", -1, null, true);
    final IndexDef indexDef = controller.getIndexes().getIndexDef(idx, IndexType.CAS);
    if (indexDef == null) {
        throw new QueryException(SDBFun.ERR_INDEX_NOT_FOUND, "Index no %s for collection %s and document %s not found.", idx, doc.getCollection().getName(), doc.getTrx().getResourceManager().getResourceConfig().getResource().getFileName().toString());
    }
    if (indexDef.getType() != IndexType.CAS) {
        throw new QueryException(SDBFun.ERR_INVALID_INDEX_TYPE, "Index no %s for collection %s and document %s is not a CAS index.", idx, doc.getCollection().getName(), doc.getTrx().getResourceManager().getResourceConfig().getResource().getFileName().toString());
    }
    final Type keyType = indexDef.getContentType();
    final Atomic key = Cast.cast(sctx, (Atomic) args[2], keyType, true);
    FunUtil.getBoolean(args, 3, "$include-low-key", true, true);
    final int[] searchModes = new int[] { -2, -1, 0, 1, 2 };
    final int searchMode = FunUtil.getInt(args, 4, "$search-mode", 0, searchModes, true);
    final SearchMode mode;
    switch(searchMode) {
        case -2:
            mode = SearchMode.LESS;
            break;
        case -1:
            mode = SearchMode.LESS_OR_EQUAL;
            break;
        case 0:
            mode = SearchMode.EQUAL;
            break;
        case 1:
            mode = SearchMode.GREATER;
            break;
        case 2:
            mode = SearchMode.GREATER_OR_EQUAL;
            break;
        default:
            // May never happen.
            mode = SearchMode.EQUAL;
    }
    final String paths = FunUtil.getString(args, 5, "$paths", null, null, false);
    final CASFilter filter = (paths != null) ? controller.createCASFilter(paths.split(";"), key, mode, new PCRCollectorImpl(rtx)) : controller.createCASFilter(new String[] {}, key, mode, new PCRCollectorImpl(rtx));
    final IndexController ic = controller;
    final DBNode node = doc;
    return new LazySequence() {

        @Override
        public Iter iterate() {
            return new BaseIter() {

                Stream<?> s;

                @Override
                public Item next() throws QueryException {
                    if (s == null) {
                        s = new SirixNodeKeyStream(ic.openCASIndex(node.getTrx().getPageTrx(), indexDef, filter), node.getCollection(), node.getTrx());
                    }
                    return (Item) s.next();
                }

                @Override
                public void close() {
                    if (s != null) {
                        s.close();
                    }
                }
            };
        }
    };
}