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/*
* 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);
}
}
}
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