binding/binding-runtime-spi/src/main/java/org/opendaylight/mdsal/binding/runtime/spi/ServiceLoaderState.java

   1 /*
   2  * Copyright (c) 2020 PANTHEON.tech, s.r.o. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.mdsal.binding.runtime.spi;
   9
  10 import java.util.ServiceLoader;
  11 import org.eclipse.jdt.annotation.NonNullByDefault;
  12 import org.opendaylight.mdsal.binding.runtime.api.BindingRuntimeGenerator;
  13 import org.opendaylight.yangtools.yang.parser.api.YangParserFactory;
  14
  15 /**
  16  * State derived from ServiceLoader. We statically bind to this state. If you need more dynamics, you should not be
  17  * showing up here at all.
  18  */
  19 @NonNullByDefault
  20 final class ServiceLoaderState {
  21     static final class Generator {
  22         static final BindingRuntimeGenerator INSTANCE = ServiceLoader.load(BindingRuntimeGenerator.class).findFirst()
  23                 .orElseThrow(() -> new ExceptionInInitializerError("No BindingRuntimeGenerator found"));
  24
  25         private Generator() {
  26             // Hidden on purpose
  27         }
  28     }
  29
  30     static final class ParserFactory {
  31         static final YangParserFactory INSTANCE = ServiceLoader.load(YangParserFactory.class).findFirst()
  32                 .orElseThrow(() -> new ExceptionInInitializerError("No YangParserFactory found"));
  33
  34         private ParserFactory() {
  35             // Hodden on purpose
  36         }
  37     }
  38
  39     private ServiceLoaderState() {
  40         // Hidden on purpose
  41     }
  42 }