Examples of org.exist.indexing.MatchListener

org.exist.indexing.MatchListener
Highlight matches in query results. Indexes can implement this interface to filter the output produced by the serializer when serializing query results. See {@link org.exist.indexing.IndexWorker#getMatchListener(org.exist.storage.DBBroker,org.exist.dom.NodeProxy)}. The interface basically extends {@link org.exist.util.serializer.Receiver}. The additional methods are used to chain multiple MatchListeners. Implementations should forward all events to the next receiver in the chain (if there is one). Class {@link org.exist.indexing.AbstractMatchListener} provides default implementationsfor all methods.

                int nodeNr = builder.getDocument().getLastNode();
                if (v.getImplementationType() == NodeValue.IN_MEMORY_NODE) {
                    ((NodeImpl)v).copyTo(context.getBroker(), docBuilder);
                } else {
                    NodeProxy p = (NodeProxy) v;
                    MatchListener ml = index.getMatchListener(context.getBroker(), p, matchCb);
                    Receiver receiver;
                    if (ml == null)
                        receiver = docBuilder;
                    else {
                        ml.setNextInChain(docBuilder);
                        receiver = ml;
                    }
                    serializer.setReceiver(receiver);
                    serializer.toReceiver((NodeProxy) v, false);
                }

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      receiver = xinclude;
    } else
      {receiver = xmlout;}
        if (root != null && getHighlightingMode() != TAG_NONE) {
            final IndexController controller = broker.getIndexController();
            MatchListener listener = controller.getMatchListener(root);
            if (listener != null) {
                final MatchListener last = (MatchListener) listener.getLastInChain();
                last.setNextInChain(receiver);
                receiver = listener;
            }
        }
        if (root == null && applyFilters && customMatchListeners.getFirst() != null) {
            customMatchListeners.getLast().setNextInChain(receiver);

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    protected Receiver setupMatchListeners(NodeProxy p) {
        final Receiver oldReceiver = receiver;
        if (getHighlightingMode() != TAG_NONE) {
            final IndexController controller = broker.getIndexController();
            MatchListener listener = controller.getMatchListener(p);
            if (listener != null) {
                final MatchListener last = (MatchListener) listener.getLastInChain();
                last.setNextInChain(receiver);
                receiver = listener;
            }
        }
        return oldReceiver;
    }

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      } else
        {receiver = new ReceiverToSAX(xslHandler);}
    }
        if (root != null && getHighlightingMode() != TAG_NONE) {
            final IndexController controller = broker.getIndexController();
            MatchListener listener = controller.getMatchListener(root);
            if (listener != null) {
                final MatchListener last = (MatchListener) listener.getLastInChain();
                last.setNextInChain(receiver);
                receiver = listener;
            }
        }
        if (applyFilters && root == null && customMatchListeners.getFirst() != null) {
            customMatchListeners.getLast().setNextInChain(receiver);

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Related Classes of org.exist.indexing.MatchListener

org.exist.storage.serializers.Serializer

org.exist.xquery.modules.ngram.HighlightMatches

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