Examples of org.gephi.filters.api.Query

org.gephi.filters.api.Query
Queries are wrapping filters and are assembled in a query tree. Each query is built from a single filter instance and it's role is to basically to execute the filter. The graph that is passed to the filter depends on the fact the query belongs to a complex query tree or if the tree is a single leaf.
The system works like this. Leaves of the query tree receives the complete graph and the subgraphs they return are passed to the parent query. Thus the root query is the last query to get the subgraphs and returns the final result. This querying system make possible to create query chains and complex scenario with various operators (AND, OR, ...).
Queries are built by the FilterController from filter instances. @author Mathieu Bastian @see FilterController

        return selectedQuery;
    }


    public Query getSelectedRoot() {
        if (selectedQuery != null) {
            Query root = selectedQuery;
            while (root.getParent() != null) {
                root = root.getParent();
            }
            return root;
        }
        return null;
    }

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            if (eventType.equals(XMLEvent.START_ELEMENT)) {
                String name = reader.getLocalName();
                if ("query".equalsIgnoreCase(name)) {
                    String id = reader.getAttributeValue(null, "id");
                    String parent = reader.getAttributeValue(null, "parent");
                    Query query = readQuery(reader);
                    if (query != null) {
                        idMap.put(Integer.parseInt(id), query);
                        if (parent != null) {
                            int parentId = Integer.parseInt(parent);
                            Query parentQuery = idMap.get(parentId);
                            
                            //A plugin filter may be missing, or the parent filter could not be deserialized.
                            //For example a partition filter, which depends on partitions, and partitions are not serialized
                            if (parentQuery != null) {
                                model.setSubQuery(parentQuery, query);

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        if (builder != null) {
            //Create filter
            Filter filter = builder.getFilter();
            FilterController fc = Lookup.getDefault().lookup(FilterController.class);
            Query query = fc.createQuery(filter);


            FilterProperty property = null;
            boolean end = false;
            while (reader.hasNext() && !end) {
                Integer eventType = reader.next();
                if (eventType.equals(XMLEvent.START_ELEMENT)) {
                    String name = reader.getLocalName();
                    if ("parameter".equalsIgnoreCase(name)) {
                        int index = Integer.parseInt(reader.getAttributeValue(null, "index"));
                        property = query.getFilter().getProperties()[index];
                    }
                } else if (eventType.equals(XMLStreamReader.CHARACTERS) && property != null) {
                    try {
                        PropertyEditor editor = property.getPropertyEditor();
                        if (editor == null) {

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    public Query[] getAllQueries() {
        List<Query> result = new ArrayList<Query>();
        LinkedList<Query> stack = new LinkedList<Query>();
        stack.addAll(queries);
        while (!stack.isEmpty()) {
            Query q = stack.pop();
            result.add(q);
            for (Query child : q.getChildren()) {
                stack.add(child);
            }
        }
        return result.toArray(new Query[0]);
    }

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        return filterModel;
    }


    public void setValue(FilterProperty property, Object value, Callback callback) {
        if (model != null) {
            Query query = model.getQuery(property.getFilter());
            if (query == null) {
                callback.setValue(value);
                return;
            }
            AbstractQueryImpl rootQuery = ((AbstractQueryImpl) query).getRoot();

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            super(NbBundle.getMessage(QueryNode.class, "QueryNode.actions.duplicate"));
        }


        public void actionPerformed(ActionEvent e) {
            FilterController filterController = Lookup.getDefault().lookup(FilterController.class);
            Query ancestor = query;
            while (ancestor.getParent() != null) {
                ancestor = ancestor.getParent();
            }
            duplicateQuery(filterController, null, ancestor);


        }

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            duplicateQuery(filterController, null, ancestor);


        }


        private void duplicateQuery(FilterController filterController, Query parent, Query child) {
            Query childQuery = filterController.createQuery(child.getFilter());
            if (parent == null) {
                filterController.add(childQuery);
            } else {
                filterController.setSubQuery(parent, childQuery);
            }

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    private boolean isDynamic(Filter filter) {
        if (filterModel.getCurrentQuery() == null) {
            return false;
        }
        Query filterQuery = null;
        for (Query q : filterModel.getCurrentQuery().getQueries(filter.getClass())) {
            if (q.getFilter() == filter) {
                filterQuery = q;
                break;
            }
        }
        if (filterQuery != null) {
            for (Query query : filterQuery.getDescendantsAndSelf()) {
                if (query.getFilter().getClass().equals(DynamicRangeFilter.class)) {
                    return true;
                }
            }
        }

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    @Override
    public void actionPerformed(ActionEvent ev) {
        FilterBuilderNode node = (FilterBuilderNode) ev.getSource();
        FilterBuilder builder = node.getBuilder();
        FilterController filterController = Lookup.getDefault().lookup(FilterController.class);
        Query function = filterController.createQuery(builder.getFilter());
        filterController.add(function);
    }

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                return new PasteType() {


                    @Override
                    public Transferable paste() throws IOException {
                        FilterController filterController = Lookup.getDefault().lookup(FilterController.class);
                        Query f = filterController.createQuery(fb.getFilter());
                        filterController.add(f);
                        return null;
                    }
                };
            } catch (UnsupportedFlavorException ex) {

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org.gephi.desktop.filters.library.FilterBuilderNodeDefaultAction

org.gephi.desktop.filters.query.QueryChildren$HelpNode

org.gephi.desktop.filters.query.QueryExplorer

org.gephi.desktop.filters.query.QueryNode$DuplicateAction

org.gephi.desktop.filters.query.RootNode

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org.gephi.filters.AbstractQueryImpl

org.gephi.filters.FilterControllerImpl

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