Examples of org.gephi.filters.spi.Filter

org.gephi.filters.spi.Filter
Filters are pruning the graph by keeping only nodes and edges that satisify filters conditions. Filters are predicates or functions that reduce the graph and therefore create sub-graphs.
Filters are the basic building blocks that are wrapped in queries and assembled to make simple or complex conditions on nodes and edges.
Filters objects are built in {@link FilterBuilder}. Implementors should define their own FilterBuilder class to propose new filter to users. @author Mathieu Bastian @see Query

                GraphView newView = graphModel.newView();
                views.add(newView);
                q.setResult(op.filter(graphModel.getGraph(newView), filters));
            } else {
                FilterQueryImpl filterQuery = (FilterQueryImpl) q;
                Filter filter = filterQuery.getFilter();
                if (filter instanceof NodeFilter && filter instanceof EdgeFilter) {
                    processNodeFilter((NodeFilter) filter, input[0]);
                    processEdgeFilter((EdgeFilter) filter, input[0]);
                    q.setResult(input[0]);
                } else if (filter instanceof NodeFilter) {

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        int id = queryId++;
        writer.writeAttribute("id", String.valueOf(id));
        if (parentId != -1) {
            writer.writeAttribute("parent", String.valueOf(parentId));
        }
        Filter filter = query.getFilter();
        FilterBuilder builder = model.getLibrary().getBuilder(filter);
        writer.writeAttribute("builder", builder.getClass().getName());
        writer.writeAttribute("filter", filter.getClass().getName());


        //Params
        for (int i = 0; i < query.getPropertiesCount(); i++) {
            FilterProperty prop = query.getFilter().getProperties()[i];
            writeParameter(writer, i, prop);

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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;

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    private void destroyQuery(Query query) {
        if (query instanceof AbstractQueryImpl) {
            AbstractQueryImpl absQuery = (AbstractQueryImpl) query;
            for (Query q : absQuery.getDescendantsAndSelf()) {
                if (q instanceof FilterQueryImpl) {
                    Filter f = ((FilterQueryImpl) q).getFilter();
                    FilterBuilder builder = filterLibraryImpl.getBuilder(f);
                    if (builder != null) {
                        builder.destroy(f);
                    }
                }

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    private void buildBuildersMap() {
        buildersMap = new HashMap<Class<? extends Filter>, FilterBuilder>();
        for (FilterBuilder builder : lookup.lookupAll(FilterBuilder.class)) {
            try {
                Filter f = builder.getFilter();
                buildersMap.put(f.getClass(), builder);
                builder.destroy(f);
            } catch (Exception e) {
            }
        }
        for (CategoryBuilder catBuilder : Lookup.getDefault().lookupAll(CategoryBuilder.class)) {
            for (FilterBuilder builder : catBuilder.getBuilders()) {
                try {
                    Filter f = builder.getFilter();
                    buildersMap.put(f.getClass(), builder);
                    builder.destroy(f);
                } catch (Exception e) {
                }
            }
        }

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        public Graph filter(Graph graph, Filter[] filters) {
            if (filters.length > 1) {
                throw new IllegalArgumentException("Not Filter accepts a single filter in parameter");
            }
            HierarchicalGraph hgraph = (HierarchicalGraph) graph;
            Filter filter = filters[0];
            if (filter instanceof EdgeFilter && ((EdgeFilter) filter).init(hgraph)) {
                EdgeFilter edgeFilter = (EdgeFilter) filter;
                for (Edge e : hgraph.getEdgesAndMetaEdges().toArray()) {
                    if (edgeFilter.evaluate(hgraph, e)) {
                        hgraph.removeEdge(e);

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        public Graph filter(Graph graph, Filter[] filters) {
            if (filters.length > 1) {
                throw new IllegalArgumentException("Not Filter accepts a single filter in parameter");
            }
            HierarchicalGraph hgraph = (HierarchicalGraph) graph;
            Filter filter = filters[0];
            if (filter instanceof NodeFilter && ((NodeFilter) filter).init(hgraph)) {
                NodeFilter nodeFilter = (NodeFilter) filter;
                for (Node n : hgraph.getNodes().toArray()) {
                    if (nodeFilter.evaluate(hgraph, n)) {
                        hgraph.removeNode(n);

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    private void destroyQuery(Query query) {
        if (query instanceof AbstractQueryImpl) {
            AbstractQueryImpl absQuery = (AbstractQueryImpl) query;
            for (Query q : absQuery.getDescendantsAndSelf()) {
                if (q instanceof FilterQueryImpl) {
                    Filter f = ((FilterQueryImpl) q).getFilter();
                    FilterBuilder builder = filterLibraryImpl.getBuilder(f);
                    if (builder != null) {
                        builder.destroy(f);
                    }
                }

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    private void buildBuildersMap() {
        buildersMap = new HashMap<Class<? extends Filter>, FilterBuilder>();
        for (FilterBuilder builder : lookup.lookupAll(FilterBuilder.class)) {
            try {
                Filter f = builder.getFilter();
                buildersMap.put(f.getClass(), builder);
                builder.destroy(f);
            } catch (Exception e) {
            }
        }
        for (CategoryBuilder catBuilder : Lookup.getDefault().lookupAll(CategoryBuilder.class)) {
            for (FilterBuilder builder : catBuilder.getBuilders()) {
                try {
                    Filter f = builder.getFilter();
                    buildersMap.put(f.getClass(), builder);
                    builder.destroy(f);
                } catch (Exception e) {
                }
            }
        }

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        public Graph filter(Graph graph, Filter[] filters) {
            if (filters.length > 1) {
                throw new IllegalArgumentException("Not Filter accepts a single filter in parameter");
            }
            HierarchicalGraph hgraph = (HierarchicalGraph) graph;
            Filter filter = filters[0];
            if (filter instanceof EdgeFilter && ((EdgeFilter) filter).init(hgraph)) {
                EdgeFilter edgeFilter = (EdgeFilter) filter;
                List<Edge> edgesToRemove = new ArrayList<Edge>();
                for (Edge e : hgraph.getEdgesAndMetaEdges().toArray()) {
                    if (edgeFilter.evaluate(hgraph, e)) {

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Related Classes of org.gephi.filters.spi.Filter

org.gephi.filters.FilterLibraryImpl

org.gephi.filters.FilterModelImpl

org.gephi.filters.FilterModelPersistenceProvider

org.gephi.filters.FilterProcessor

org.gephi.filters.plugin.operator.NOTBuilderEdge$NotOperatorEdge

org.gephi.filters.plugin.operator.NOTBuilderNode$NOTOperatorNode

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