model/yang-model-ri/src/main/java/org/opendaylight/yangtools/yang/model/ri/stmt/impl/eff/TypedefEffectiveStatementImpl.java

   1 /*
   2  * Copyright (c) 2015 Cisco Systems, Inc. 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.model.ri.stmt.impl.eff;
   9
  10 import com.google.common.collect.ImmutableList;
  11 import java.lang.invoke.MethodHandles;
  12 import java.lang.invoke.MethodHandles.Lookup;
  13 import java.lang.invoke.VarHandle;
  14 import java.util.Map;
  15 import java.util.Optional;
  16 import org.eclipse.jdt.annotation.NonNull;
  17 import org.opendaylight.yangtools.yang.common.QName;
  18 import org.opendaylight.yangtools.yang.model.api.TypeDefinition;
  19 import org.opendaylight.yangtools.yang.model.api.UnknownSchemaNode;
  20 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
  21 import org.opendaylight.yangtools.yang.model.api.meta.IdentifierNamespace;
  22 import org.opendaylight.yangtools.yang.model.api.meta.StatementOrigin;
  23 import org.opendaylight.yangtools.yang.model.api.stmt.DefaultEffectiveStatement;
  24 import org.opendaylight.yangtools.yang.model.api.stmt.DescriptionEffectiveStatement;
  25 import org.opendaylight.yangtools.yang.model.api.stmt.ReferenceEffectiveStatement;
  26 import org.opendaylight.yangtools.yang.model.api.stmt.StatusEffectiveStatement;
  27 import org.opendaylight.yangtools.yang.model.api.stmt.TypeEffectiveStatement;
  28 import org.opendaylight.yangtools.yang.model.api.stmt.TypeStatement;
  29 import org.opendaylight.yangtools.yang.model.api.stmt.TypedefEffectiveStatement;
  30 import org.opendaylight.yangtools.yang.model.api.stmt.TypedefStatement;
  31 import org.opendaylight.yangtools.yang.model.api.stmt.UnitsEffectiveStatement;
  32 import org.opendaylight.yangtools.yang.model.ri.type.DerivedTypeBuilder;
  33 import org.opendaylight.yangtools.yang.model.ri.type.DerivedTypes;
  34 import org.opendaylight.yangtools.yang.model.spi.meta.AbstractDeclaredEffectiveStatement.DefaultArgument.WithSubstatements;
  35 import org.opendaylight.yangtools.yang.model.spi.meta.EffectiveStatementMixins.SchemaNodeMixin;
  36 import org.slf4j.Logger;
  37 import org.slf4j.LoggerFactory;
  38
  39 public final class TypedefEffectiveStatementImpl extends WithSubstatements<QName, TypedefStatement>
  40         implements TypedefEffectiveStatement, SchemaNodeMixin<TypedefStatement> {
  41     private static final Logger LOG = LoggerFactory.getLogger(TypedefEffectiveStatementImpl.class);
  42
  43     private static final VarHandle TYPE_DEFINITION;
  44     private static final VarHandle TYPE_STATEMENT;
  45
  46     static {
  47         final Lookup lookup = MethodHandles.lookup();
  48         try {
  49             TYPE_DEFINITION = lookup.findVarHandle(TypedefEffectiveStatementImpl.class, "typeDefinition",
  50                 TypeDefinition.class);
  51             TYPE_STATEMENT = lookup.findVarHandle(TypedefEffectiveStatementImpl.class, "typeStatement",
  52                 ProxyTypeEffectiveStatement.class);
  53         } catch (NoSuchFieldException | IllegalAccessException e) {
  54             throw new ExceptionInInitializerError(e);
  55         }
  56     }
  57
  58     private final int flags;
  59
  60     // Accessed via TYPE_DEFINITION
  61     @SuppressWarnings("unused")
  62     private volatile TypeDefinition<?> typeDefinition;
  63     // Accessed via TYPE_STATEMENT
  64     @SuppressWarnings("unused")
  65     private volatile ProxyTypeEffectiveStatement typeStatement;
  66
  67     public TypedefEffectiveStatementImpl(final TypedefStatement declared, final int flags,
  68             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
  69         super(declared, substatements);
  70         this.flags = flags;
  71     }
  72
  73     @Override
  74     public int flags() {
  75         return flags;
  76     }
  77
  78     @Override
  79     public TypeDefinition<?> getTypeDefinition() {
  80         final TypeDefinition<?> existing = (TypeDefinition<?>) TYPE_DEFINITION.getAcquire(this);
  81         return existing != null ? existing : loadTypeDefinition();
  82     }
  83
  84     @Override
  85     public TypeEffectiveStatement<TypeStatement> asTypeEffectiveStatement() {
  86         final ProxyTypeEffectiveStatement local = (ProxyTypeEffectiveStatement) TYPE_STATEMENT.getAcquire(this);
  87         return local != null ? local : loadTypeStatement();
  88     }
  89
  90     private @NonNull TypeDefinition<?> loadTypeDefinition() {
  91         final TypeEffectiveStatement<?> type = findFirstEffectiveSubstatement(TypeEffectiveStatement.class).get();
  92         final DerivedTypeBuilder<?> builder = DerivedTypes.derivedTypeBuilder(type.getTypeDefinition(), argument());
  93
  94         for (final EffectiveStatement<?, ?> stmt : effectiveSubstatements()) {
  95             if (stmt instanceof DefaultEffectiveStatement) {
  96                 builder.setDefaultValue(((DefaultEffectiveStatement) stmt).argument());
  97             } else if (stmt instanceof DescriptionEffectiveStatement) {
  98                 builder.setDescription(((DescriptionEffectiveStatement)stmt).argument());
  99             } else if (stmt instanceof ReferenceEffectiveStatement) {
 100                 builder.setReference(((ReferenceEffectiveStatement)stmt).argument());
 101             } else if (stmt instanceof StatusEffectiveStatement) {
 102                 builder.setStatus(((StatusEffectiveStatement)stmt).argument());
 103             } else if (stmt instanceof UnitsEffectiveStatement) {
 104                 builder.setUnits(((UnitsEffectiveStatement)stmt).argument());
 105             } else if (stmt instanceof UnknownSchemaNode) {
 106                 // FIXME: should not directly implement, I think
 107                 builder.addUnknownSchemaNode((UnknownSchemaNode)stmt);
 108             } else if (!(stmt instanceof TypeEffectiveStatement)) {
 109                 LOG.debug("Ignoring statement {}", stmt);
 110             }
 111         }
 112
 113         final TypeDefinition<?> created = builder.build();
 114         final Object witness = TYPE_DEFINITION.compareAndExchangeRelease(this, null, created);
 115         return witness == null ? created : (TypeDefinition<?>) witness;
 116     }
 117
 118     private @NonNull ProxyTypeEffectiveStatement loadTypeStatement() {
 119         final ProxyTypeEffectiveStatement created = new ProxyTypeEffectiveStatement();
 120         final Object witness = TYPE_STATEMENT.compareAndExchangeRelease(this, null, created);
 121         return witness == null ? created : (ProxyTypeEffectiveStatement) witness;
 122     }
 123
 124     private final class ProxyTypeEffectiveStatement implements TypeEffectiveStatement<TypeStatement> {
 125         @Override
 126         public TypeStatement getDeclared() {
 127             return null;
 128         }
 129
 130         @Override
 131         public <K, V, N extends IdentifierNamespace<K, V>> Optional<V> get(final Class<N> namespace,
 132                 final K identifier) {
 133             return TypedefEffectiveStatementImpl.this.get(namespace, identifier);
 134         }
 135
 136         @Override
 137         public <K, V, N extends IdentifierNamespace<K, V>> Map<K, V> getAll(final Class<N> namespace) {
 138             return TypedefEffectiveStatementImpl.this.getAll(namespace);
 139         }
 140
 141         @Override
 142         public ImmutableList<? extends EffectiveStatement<?, ?>> effectiveSubstatements() {
 143             return TypedefEffectiveStatementImpl.this.effectiveSubstatements();
 144         }
 145
 146         @Override
 147         public QName argument() {
 148             return TypedefEffectiveStatementImpl.this.argument();
 149         }
 150
 151         @Override
 152         public StatementOrigin statementOrigin() {
 153             return StatementOrigin.CONTEXT;
 154         }
 155
 156         @Override
 157         public TypeDefinition<?> getTypeDefinition() {
 158             return TypedefEffectiveStatementImpl.this.getTypeDefinition();
 159         }
 160     }
 161 }