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