parser/yang-parser-impl/src/main/java/org/opendaylight/yangtools/yang/parser/impl/DefaultYangParserFactory.java

   1 /*
   2  * Copyright (c) 2017 Pantheon Technologies, 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.yangtools.yang.parser.impl;
   9
  10 import static com.google.common.base.Preconditions.checkArgument;
  11
  12 import com.google.common.annotations.Beta;
  13 import java.util.Collection;
  14 import java.util.List;
  15 import java.util.concurrent.ConcurrentHashMap;
  16 import java.util.concurrent.ConcurrentMap;
  17 import java.util.function.Function;
  18 import javax.inject.Inject;
  19 import javax.inject.Singleton;
  20 import org.eclipse.jdt.annotation.NonNull;
  21 import org.kohsuke.MetaInfServices;
  22 import org.opendaylight.yangtools.yang.parser.api.ImportResolutionMode;
  23 import org.opendaylight.yangtools.yang.parser.api.YangParser;
  24 import org.opendaylight.yangtools.yang.parser.api.YangParserConfiguration;
  25 import org.opendaylight.yangtools.yang.parser.api.YangParserFactory;
  26 import org.opendaylight.yangtools.yang.parser.stmt.reactor.CrossSourceStatementReactor;
  27 import org.opendaylight.yangtools.yang.xpath.api.YangXPathParserFactory;
  28 import org.osgi.service.component.annotations.Activate;
  29 import org.osgi.service.component.annotations.Component;
  30 import org.osgi.service.component.annotations.Reference;
  31
  32 /**
  33  * Reference {@link YangParserFactory} implementation.
  34  */
  35 @Beta
  36 @MetaInfServices
  37 @Singleton
  38 @Component(immediate = true)
  39 public final class DefaultYangParserFactory implements YangParserFactory {
  40     private static final List<ImportResolutionMode> SUPPORTED_MODES = List.of(ImportResolutionMode.DEFAULT);
  41
  42     private final ConcurrentMap<YangParserConfiguration, CrossSourceStatementReactor> reactors =
  43         new ConcurrentHashMap<>(2);
  44     private final Function<YangParserConfiguration, CrossSourceStatementReactor> reactorFactory;
  45
  46     /**
  47      * Construct a new {@link YangParserFactory} backed by {@link DefaultReactors#defaultReactor()}.
  48      */
  49     public DefaultYangParserFactory() {
  50         reactorFactory = config -> DefaultReactors.defaultReactorBuilder(config).build();
  51         // Make sure default reactor is available
  52         reactorFactory.apply(YangParserConfiguration.DEFAULT);
  53     }
  54
  55     @Inject
  56     @Activate
  57     public DefaultYangParserFactory(final @Reference YangXPathParserFactory xpathFactory) {
  58         reactorFactory = config -> DefaultReactors.defaultReactorBuilder(xpathFactory, config).build();
  59     }
  60
  61     @Override
  62     public Collection<ImportResolutionMode> supportedImportResolutionModes() {
  63         return SUPPORTED_MODES;
  64     }
  65
  66     @Override
  67     public @NonNull YangParser createParser(final YangParserConfiguration configuration) {
  68         final ImportResolutionMode importMode = configuration.importResolutionMode();
  69         checkArgument(SUPPORTED_MODES.contains(importMode), "Unsupported import resolution mode %s", importMode);
  70         return new DefaultYangParser(reactors.computeIfAbsent(configuration, reactorFactory).newBuild());
  71     }
  72 }