Examples of org.apache.karaf.features.Feature

org.apache.karaf.features.Feature
A feature is a list of bundles associated identified by its name.

        }
        uninstallFeature(name, versions.get(0));
    }
    
    public void uninstallFeature(String name, String version) throws Exception {
      Feature feature = getFeature(name, version);
        if (feature == null || !installed.containsKey(feature)) {
            throw new Exception("Feature named '" + name 
                + "' with version '" + version + "' is not installed");
        }
        // Grab all the bundles installed by this feature

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        }
        Map<String, Feature> versions = getFeatures().get(name);
        if (versions == null || versions.isEmpty()) {
            return null;
        } else {
            Feature feature = versions.get(version);
            if (feature == null) {
                if (FeatureImpl.DEFAULT_VERSION.equals(version)) {
                    Version latest = new Version(cleanupVersion(version));
                    for (String available : versions.keySet()) {
                        Version availableVersion = new Version(cleanupVersion(available));

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                                featureVersion = FeatureImpl.DEFAULT_VERSION;
                            }


                            try {
                                // try to grab specific feature version
                                Feature feature = getFeature(featureName, featureVersion);
                                if (feature != null) {
                                    features.add(feature);
                                } else {
                                    LOGGER.error("Error installing boot feature " + f + ": feature not found");
                                }

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        return l;
    }


    protected void saveMap(Properties props, String prefix, Map<Feature, Set<Long>> map) {
        for (Map.Entry<Feature, Set<Long>> entry : map.entrySet()) {
            Feature key = entry.getKey();
            String val = createValue(entry.getValue());
            props.put(prefix + key.toString(), val);
        }
    }

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    private String getFeaturesContainingBundleList(Bundle bundle) throws Exception {
        Set<Feature> features = getFeaturesContainingBundle(bundle);
        StringBuilder buffer = new StringBuilder();
        Iterator<Feature> iter = features.iterator();
        while (iter.hasNext()) {
            Feature feature= iter.next();
            buffer.append(feature.getId());
            if (iter.hasNext()) {
                buffer.append(", ");
            }
        }
        return buffer.toString();

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    @Option(name = "-t", aliases={"--tree"}, description="Display feature tree", required = false, multiValued = false)
    private boolean tree;


    protected void doExecute(FeaturesService admin) throws Exception {
        Feature feature = null;


        if (version != null && version.length() > 0) {
            feature = admin.getFeature(name, version);
        } else {
            feature = admin.getFeature(name);
        }


        if (feature == null) {
            System.out.println("Feature not found");
            return;
        }


        // default behavior
        if (!config && !dependency && !bundle && !conditional) {
            config = true;
            dependency = true;
            bundle = true;
            conditional = true;
        }


        System.out.println("Feature " + feature.getName() + " " + feature.getVersion());
        if (feature.getDescription() != null) {
          System.out.println("Description:");
          System.out.println(INDENT + feature.getDescription());
        }
        
        if(feature.getDetails() != null) {
          System.out.println("Details:");
          printWithIndent(feature.getDetails());
        }


        if (config) {
            displayConfigInformation(feature, FEATURE_CONTENT);
            displayConfigFileInformation(feature, FEATURE_CONTENT);
        }


        if (dependency) {
            displayDependencyInformation(feature, FEATURE_CONTENT);
        }


        if (bundle) {
            displayBundleInformation(feature, FEATURE_CONTENT);
        }


        if(conditional) {
           displayConditionalInfo(feature);
        }


        if (tree) {
            if (config || dependency || bundle) {
                System.out.println("\nFeature tree");
            }


            int unresolved = displayFeatureTree(admin, feature.getName(), feature.getVersion(), "");
            if (unresolved > 0) {
                System.out.println("Tree contains " + unresolved + " unresolved dependencies");
                System.out.println(" * means that node declares dependency but the dependent feature is not available.");
            }
        }

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     * @throws Exception
     */
    private int displayFeatureTree(FeaturesService admin, String featureName, String featureVersion, String prefix) throws Exception {
        int unresolved = 0;


        Feature resolved = admin.getFeature(featureName, featureVersion);
        if (resolved != null) {
            System.out.println(prefix + " " + resolved.getName() + " " + resolved.getVersion());
        } else {
            System.out.println(prefix + " " + featureName + " " + featureVersion + " *");
            unresolved++;
        }


        if (resolved != null) {
            if (bundle) {
                List<String> bundleLocation = new LinkedList<String>();
                List<BundleInfo> bundles = resolved.getBundles();
                for (BundleInfo bundleInfo : bundles) {
                    bundleLocation.add(bundleInfo.getLocation());
                }


                if (conditional) {
                    for (Conditional cond : resolved.getConditional()) {
                        List<? extends Dependency> condition = cond.getCondition();
                        List<BundleInfo> conditionalBundles = cond.getBundles();
                        for (BundleInfo bundleInfo : conditionalBundles) {
                            bundleLocation.add(bundleInfo.getLocation() + "(condition:"+condition+")");
                        }
                    }
                }
                for (int i = 0, j = bundleLocation.size(); i < j; i++) {
                    System.out.println(prefix + " " + (i + 1 == j ? "\\" : "+") + " " + bundleLocation.get(i));
                }
            }
            prefix += "   ";
            List<Dependency> dependencies = resolved.getDependencies();
            for (int i = 0, j = dependencies.size(); i < j; i++) {
                Dependency toDisplay =  dependencies.get(i);
                unresolved += displayFeatureTree(admin, toDisplay.getName(), toDisplay.getVersion(), prefix +1);
            }


            if (conditional) {
                for (Conditional cond : resolved.getConditional()) {
                    List<Dependency> conditionDependencies = cond.getDependencies();
                    for (int i = 0, j = conditionDependencies.size(); i < j; i++) {
                        Dependency toDisplay =  dependencies.get(i);
                        unresolved += displayFeatureTree(admin, toDisplay.getName(), toDisplay.getVersion(), prefix +1);
                    }

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            System.out.println("Feature has no conditionals.");
        } else {
            System.out.println("Feature contains followed conditionals:");
            for (Conditional featureConditional : conditionals) {
                String conditionDescription = getConditionDescription(featureConditional);
                Feature wrappedConditional = featureConditional.asFeature(feature.getName(), feature.getVersion());
                if (config) {
                    displayConfigInformation(wrappedConditional, String.format(CONDITIONAL_CONTENT, conditionDescription));
                    displayConfigFileInformation(wrappedConditional, String.format(CONDITIONAL_CONTENT, conditionDescription));
                }

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        dataFile = File.createTempFile("features", null, null);
    }


    @Test
    public void testGetFeature() throws Exception {
        Feature transactionFeature = feature("transaction", "1.0.0");
        final Map<String, Map<String, Feature>> features = features(transactionFeature);
        final FeaturesServiceImpl impl = new FeaturesServiceImpl(null, null) {
            protected Map<String,Map<String,Feature>> getFeatures() throws Exception {
                return features;
            };

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        final FeaturesServiceImpl impl = new FeaturesServiceImpl(null, null) {
            protected Map<String,Map<String,Feature>> getFeatures() throws Exception {
                return features(feature("transaction", "1.0.0"));
            };
        };
        Feature feature = impl.getFeature("transaction", "  1.0.0  ");
        assertNotNull(feature);
        assertSame("transaction", feature.getName());
    }

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