Examples of org.apache.karaf.features.Feature

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

     * @return
     */
    private boolean dependenciesSatisfied(List<Feature> dependencies, Set<Feature> installed) throws Exception {
       boolean satisfied = true;
       for (Feature dep : dependencies) {
           Feature f = getFeature(dep.getName(), dep.getVersion());
           if (f != null && !installed.contains(f)) {
               satisfied = false;
           }
       }
       return satisfied;

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    public void installFeature(String name, String version) throws Exception {
        installFeature(name, version, EnumSet.noneOf(Option.class));
    }


    public void installFeature(String name, String version, EnumSet<Option> options) throws Exception {
        Feature f = getFeature(name, version);
        if (f == null) {
            throw new Exception("No feature named '" + name
                + "' with version '" + version + "' available");
        }
        installFeature(f, options);

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            System.out.println("Installing feature " + feature.getName() + " " + feature.getVersion());
        }
        for (Feature dependency : feature.getDependencies()) {
            VersionRange range = FeatureImpl.DEFAULT_VERSION.equals(dependency.getVersion())
                        ? VersionRange.ANY_VERSION : new VersionRange(dependency.getVersion(), true, true);
            Feature fi = null;
            for (Feature f : installed.keySet()) {
                if (f.getName().equals(dependency.getName())) {
                    Version v = VersionTable.getVersion(f.getVersion());
                    if (range.contains(v)) {
                        if (fi == null || VersionTable.getVersion(fi.getVersion()).compareTo(v) < 0) {
                            fi = f;
                        }
                    }
                }
            }
            if (fi == null) {
                Map<String, Feature> avail = getFeatures().get(dependency.getName());
                if (avail != null) {
                    for (Feature f : avail.values()) {
                        Version v = VersionTable.getVersion(f.getVersion());
                        if (range.contains(v)) {
                            if (fi == null || VersionTable.getVersion(fi.getVersion()).compareTo(v) < 0) {
                                fi = f;
                            }
                        }
                    }
                }

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        }
        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) {
            config = true;
            dependency = true;
            bundle = true;
        }


        System.out.println("Description of " + feature.getName() + " " + feature.getVersion() + " feature");
        System.out.println("----------------------------------------------------------------");
        if(feature.getDetails() != null && feature.getDetails().length() >0) {
           System.out.print(feature.getDetails());
           System.out.println("----------------------------------------------------------------");
        }
        if (config) {
            displayConfigInformation(feature);
            displayConfigFileInformation(feature);

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    private int displayFeatureTree(FeaturesService admin, Feature feature, int level, boolean last) throws Exception {
        int unresolved = 0;
        String prefix = repeat("   ", level);


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


        if (bundle) {
            List<BundleInfo> bundles = resolved != null ? resolved.getBundles() : feature.getBundles();
            for (int i = 0, j = bundles.size(); i < j; i++) {
                System.out.println(prefix + " " + (i+1 == j ? "\\" : "+") + " " + bundles.get(i).getLocation());
            }
        }
        List<Feature> dependencies = resolved != null ? resolved.getDependencies() : feature.getDependencies();
        for (int i = 0, j = dependencies.size(); i < j; i++) {
            Feature toDisplay = resolveFeature(admin, dependencies.get(i));
            if (toDisplay == null) {
                toDisplay = dependencies.get(i);
            }
            unresolved += displayFeatureTree(admin, toDisplay, level+1, i + 1 == j);
        }

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