1 files changed, 97 insertions, 0 deletions
diff --git a/infra/minimal-distribution/src/main/java/io/fd/honeycomb/infra/distro/schema/YangModulesProvider.java b/infra/minimal-distribution/src/main/java/io/fd/honeycomb/infra/distro/schema/YangModulesProvider.java
new file mode 100644
index 000000000..f6d8ea0c1
--- /dev/null
+++ b/infra/minimal-distribution/src/main/java/io/fd/honeycomb/infra/distro/schema/YangModulesProvider.java
@@ -0,0 +1,97 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.fd.honeycomb.infra.distro.schema;
+
+
+import static java.lang.String.format;
+
+import com.google.common.base.Charsets;
+import com.google.common.io.Resources;
+import com.google.inject.Inject;
+import com.google.inject.Provider;
+import io.fd.honeycomb.infra.distro.activation.ActivationConfig;
+import io.fd.honeycomb.infra.distro.activation.ActiveModules;
+import java.io.IOException;
+import java.net.URL;
+import java.util.Collection;
+import java.util.Set;
+import java.util.stream.Collectors;
+import javax.annotation.Nonnull;
+import org.opendaylight.yangtools.yang.binding.YangModelBindingProvider;
+
+/**
+ * Loads active yang modules
+ * Relying on generate yang-module-index
+ */
+public class YangModulesProvider implements Provider<YangModulesProvider.YangModules> {
+
+    @Inject
+    private ActiveModules activeModules;
+
+    @Inject
+    private ActivationConfig config;
+
+    @Override
+    public YangModules get() {
+        // no need to bind this, pretty big map and its needed just here
+        final YangModuleMappingIndex index = new YangModuleMappingIndex(config.getYangModulesIndexPath());
+
+        return new YangModules(activeModules.getActiveModulesClasses().stream()
+                .map(Class::getName)
+                .map(index::getByModuleName)
+                .flatMap(Collection::stream)
+                .map(YangModulesProvider::loadClass)
+                .map(aClass -> (Class<? extends YangModelBindingProvider>) aClass)
+                .collect(Collectors.toSet()));
+    }
+
+    static class YangModules {
+        private final Set<Class<? extends YangModelBindingProvider>> yangBindings;
+
+        YangModules(final Set<Class<? extends YangModelBindingProvider>> yangBindings) {
+            this.yangBindings = yangBindings;
+        }
+
+        Set<YangModelBindingProvider> getYangBindings() {
+            return yangBindings.stream()
+                    .map(providerClass -> {
+                        try {
+                            return providerClass.newInstance();
+                        } catch (InstantiationException | IllegalAccessException e) {
+                            throw new IllegalStateException(format("Unable to create instance of %s", providerClass),
+                                    e);
+                        }
+                    }).collect(Collectors.toSet());
+        }
+    }
+
+    private static Class<?> loadClass(@Nonnull final String className) {
+        try {
+            return Class.forName(className);
+        } catch (ClassNotFoundException e) {
+            throw new IllegalArgumentException("Unable to load class: " + className, e);
+        }
+    }
+
+    static String urlToString(@Nonnull final URL url) {
+        try {
+            return Resources.toString(url, Charsets.UTF_8);
+        } catch (IOException e) {
+            throw new IllegalArgumentException("Unable to read resource from: " + url, e);
+        }
+    }
+}