Package org.grouplens.lenskit.inject

Examples of org.grouplens.lenskit.inject.RecommenderGraphBuilder

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        LenskitRecommenderEngineBuilder builder = LenskitRecommenderEngine.newBuilder();
        if (defaults != null) {
            builder.addConfiguration(defaults);
        }
        builder.addConfiguration(config);
        RecommenderGraphBuilder rgb = new RecommenderGraphBuilder();
        rgb.addConfiguration(defaults);
        rgb.addConfiguration(config);
        try {
            return rgb.buildGraph();
        } catch (ResolutionException e) {
            throw new RecommenderConfigurationException("error configuring recommender", e);
        }
    }
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     * @throws RecommenderConfigurationException if there is an error configuring the recommender.
     */
    public LenskitRecommender createRecommender(LenskitConfiguration config) throws RecommenderConfigurationException {
        Preconditions.checkNotNull(config, "extra configuration");
        final DAGNode<Component, Dependency> toBuild;
        RecommenderGraphBuilder rgb = new RecommenderGraphBuilder();
        rgb.addBindings(config.getBindings());
        DependencySolver solver = rgb.buildDependencySolver();
        try {
            toBuild = solver.rewrite(graph);
        } catch (ResolutionException ex) {
            throw new RecommenderConfigurationException("error reconfiguring recommender", ex);
        }
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     * @return The full graph.
     * @deprecated This shouldn't be used anymore.
     */
    @Deprecated
    public DAGNode<Component,Dependency> buildGraph() throws RecommenderConfigurationException {
        RecommenderGraphBuilder rgb = new RecommenderGraphBuilder();
        rgb.addBindings(bindings);
        rgb.addRoots(roots);
        try {
            return rgb.buildGraph();
        } catch (ResolutionException e) {
            throw new RecommenderConfigurationException("Cannot resolve configuration graph", e);
        }
    }
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            in.close();
        }

        if (!configurations.isEmpty()) {
            logger.info("rewriting with {} configurations", configurations.size());
            RecommenderGraphBuilder rgb = new RecommenderGraphBuilder();
            for (LenskitConfiguration config : configurations) {
                rgb.addBindings(config.getBindings());
            }
            DependencySolver solver = rgb.buildDependencySolver();
            try {
                graph = solver.rewrite(graph);
            } catch (ResolutionException e) {
                throw new RecommenderConfigurationException("resolution error occured while rewriting recommender", e);
            }
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     * @throws RecommenderBuildException
     */
    public LenskitRecommenderEngine build() throws RecommenderBuildException {
        // Build the initial graph
        logger.debug("building graph from {} configurations", configurations.size());
        RecommenderGraphBuilder rgb = new RecommenderGraphBuilder();
        rgb.setClassLoader(classLoader);
        for (Pair<LenskitConfiguration,ModelDisposition> cfg: configurations) {
            rgb.addConfiguration(cfg.getLeft());
        }
        RecommenderInstantiator inst;
        try {
            inst = RecommenderInstantiator.create(rgb.buildGraph());
        } catch (ResolutionException e) {
            throw new RecommenderBuildException("Cannot resolve recommender graph", e);
        }
        DAGNode<Component, Dependency> graph = inst.instantiate();

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        boolean instantiable = GraphtUtils.getPlaceholderNodes(graph).isEmpty();
        return new LenskitRecommenderEngine(graph, instantiable);
    }

    private DAGNode<Component, Dependency> rewriteGraph(DAGNode<Component, Dependency> graph) throws RecommenderConfigurationException {
        RecommenderGraphBuilder rewriteBuilder = new RecommenderGraphBuilder();
        boolean rewrite = false;
        for (Pair<LenskitConfiguration,ModelDisposition> cfg: configurations) {
            switch (cfg.getRight()) {
            case EXCLUDED:
                rewriteBuilder.addBindings(cfg.getLeft().getBindings());
                rewriteBuilder.addRoots(cfg.getLeft().getRoots());
                rewrite = true;
                break;
            }
        }

        if (rewrite) {
            logger.debug("rewriting graph");
            DependencySolver rewriter = rewriteBuilder.buildDependencyUnsolver();
            try {
                graph = rewriter.rewrite(graph);
            } catch (ResolutionException e) {
                throw new RecommenderConfigurationException("Resolution error while rewriting graph", e);
            }
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        daoConfig.bind(EventDAO.class).toProvider(Providers.<EventDAO>of(null, EventDAO.class));
        if (domain != null) {
            daoConfig.bind(PreferenceDomain.class).to(domain);
        }

        RecommenderGraphBuilder rgb = new RecommenderGraphBuilder();
        rgb.addConfiguration(daoConfig);
        rgb.addConfiguration(algorithm.getConfig());
        DAGNode<Component,Dependency> graph = null;
        try {
            graph = rgb.buildGraph();
        } catch (ResolutionException e) {
            throw new TaskExecutionException("Cannot resolve graph", e);
        }

        logger.info("dumping graph {}", getName());
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     * @return The configuration graph.
     * @throws IOException
     * @throws RecommenderConfigurationException
     */
    private DAGNode<Component,Dependency> makeNewGraph() throws IOException, RecommenderConfigurationException {
        RecommenderGraphBuilder rgb = new RecommenderGraphBuilder();
        rgb.addConfiguration(makeDataConfig());
        for (LenskitConfiguration config: environment.loadConfigurations(getConfigFiles())) {
            rgb.addConfiguration(config);
        }

        try {
            return rgb.buildGraph();
        } catch (ResolutionException e) {
            throw new RecommenderConfigurationException("Cannot configure recommender", e);
        }
    }
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Related Classes of org.grouplens.lenskit.inject.RecommenderGraphBuilder

  • org.grouplens.lenskit.cli.Graph
  • org.grouplens.lenskit.core.LenskitConfiguration
  • org.grouplens.lenskit.core.LenskitRecommenderEngine
  • org.grouplens.lenskit.core.LenskitRecommenderEngineBuilder
  • org.grouplens.lenskit.core.LenskitRecommenderEngineLoader
  • org.grouplens.lenskit.eval.algorithm.AlgorithmInstance
  • org.grouplens.lenskit.eval.graph.DumpGraphTask
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