yang/yang-parser-rfc7950/src/main/java/org/opendaylight/yangtools/yang/parser/rfc7950/stmt/typedef/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.parser.rfc7950.stmt.typedef;
   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.Collection;
  15 import java.util.Map;
  16 import java.util.Optional;
  17 import org.eclipse.jdt.annotation.NonNull;
  18 import org.eclipse.jdt.annotation.Nullable;
  19 import org.opendaylight.yangtools.yang.common.QName;
  20 import org.opendaylight.yangtools.yang.model.api.SchemaNodeDefaults;
  21 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
  22 import org.opendaylight.yangtools.yang.model.api.TypeDefinition;
  23 import org.opendaylight.yangtools.yang.model.api.UnknownSchemaNode;
  24 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
  25 import org.opendaylight.yangtools.yang.model.api.meta.IdentifierNamespace;
  26 import org.opendaylight.yangtools.yang.model.api.meta.StatementSource;
  27 import org.opendaylight.yangtools.yang.model.api.stmt.DefaultEffectiveStatement;
  28 import org.opendaylight.yangtools.yang.model.api.stmt.DescriptionEffectiveStatement;
  29 import org.opendaylight.yangtools.yang.model.api.stmt.ReferenceEffectiveStatement;
  30 import org.opendaylight.yangtools.yang.model.api.stmt.StatusEffectiveStatement;
  31 import org.opendaylight.yangtools.yang.model.api.stmt.TypeEffectiveStatement;
  32 import org.opendaylight.yangtools.yang.model.api.stmt.TypeStatement;
  33 import org.opendaylight.yangtools.yang.model.api.stmt.TypedefEffectiveStatement;
  34 import org.opendaylight.yangtools.yang.model.api.stmt.TypedefStatement;
  35 import org.opendaylight.yangtools.yang.model.api.stmt.UnitsEffectiveStatement;
  36 import org.opendaylight.yangtools.yang.model.util.type.DerivedTypeBuilder;
  37 import org.opendaylight.yangtools.yang.model.util.type.DerivedTypes;
  38 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.AbstractDeclaredEffectiveStatement.Default;
  39 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.EffectiveStatementMixins.SchemaNodeMixin;
  40 import org.slf4j.Logger;
  41 import org.slf4j.LoggerFactory;
  42
  43 final class TypedefEffectiveStatementImpl extends Default<QName, TypedefStatement>
  44         implements TypedefEffectiveStatement, SchemaNodeMixin<QName, TypedefStatement> {
  45     private static final Logger LOG = LoggerFactory.getLogger(TypedefEffectiveStatementImpl.class);
  46
  47     private static final VarHandle TYPE_DEFINITION;
  48     private static final VarHandle TYPE_STATEMENT;
  49
  50     static {
  51         final Lookup lookup = MethodHandles.lookup();
  52         try {
  53             TYPE_DEFINITION = lookup.findVarHandle(TypedefEffectiveStatementImpl.class, "typeDefinition",
  54                 TypeDefinition.class);
  55             TYPE_STATEMENT = lookup.findVarHandle(TypedefEffectiveStatementImpl.class, "typeStatement",
  56                 ProxyTypeEffectiveStatement.class);
  57         } catch (NoSuchFieldException | IllegalAccessException e) {
  58             throw new ExceptionInInitializerError(e);
  59         }
  60     }
  61
  62     private final @NonNull Object substatements;
  63     private final @Nullable SchemaPath path;
  64     private final int flags;
  65
  66     // Accessed via TYPE_DEFINITION
  67     @SuppressWarnings("unused")
  68     private volatile TypeDefinition<?> typeDefinition;
  69     // Accessed via TYPE_STATEMENT
  70     @SuppressWarnings("unused")
  71     private volatile ProxyTypeEffectiveStatement typeStatement;
  72
  73     TypedefEffectiveStatementImpl(final TypedefStatement declared, final SchemaPath path, final int flags,
  74             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
  75         super(declared);
  76         this.path = path;
  77         this.flags = flags;
  78         this.substatements = maskList(substatements);
  79     }
  80
  81     @Override
  82     public int flags() {
  83         return flags;
  84     }
  85
  86     @Override
  87     @Deprecated
  88     public SchemaPath getPath() {
  89         return SchemaNodeDefaults.throwUnsupportedIfNull(this, path);
  90     }
  91
  92     @Override
  93     public @NonNull QName argument() {
  94         return getQName();
  95     }
  96
  97     @Override
  98     public ImmutableList<? extends EffectiveStatement<?, ?>> effectiveSubstatements() {
  99         return unmaskList(substatements);
 100     }
 101
 102     @Override
 103     public TypeDefinition<?> getTypeDefinition() {
 104         final TypeDefinition<?> existing = (TypeDefinition<?>) TYPE_DEFINITION.getAcquire(this);
 105         return existing != null ? existing : loadTypeDefinition();
 106     }
 107
 108     @Override
 109     public TypeEffectiveStatement<TypeStatement> asTypeEffectiveStatement() {
 110         final ProxyTypeEffectiveStatement local = (ProxyTypeEffectiveStatement) TYPE_STATEMENT.getAcquire(this);
 111         return local != null ? local : loadTypeStatement();
 112     }
 113
 114     private @NonNull TypeDefinition<?> loadTypeDefinition() {
 115         final TypeEffectiveStatement<?> type = findFirstEffectiveSubstatement(TypeEffectiveStatement.class).get();
 116         final DerivedTypeBuilder<?> builder = DerivedTypes.derivedTypeBuilder(type.getTypeDefinition(), getQName());
 117
 118         for (final EffectiveStatement<?, ?> stmt : effectiveSubstatements()) {
 119             if (stmt instanceof DefaultEffectiveStatement) {
 120                 builder.setDefaultValue(((DefaultEffectiveStatement) stmt).argument());
 121             } else if (stmt instanceof DescriptionEffectiveStatement) {
 122                 builder.setDescription(((DescriptionEffectiveStatement)stmt).argument());
 123             } else if (stmt instanceof ReferenceEffectiveStatement) {
 124                 builder.setReference(((ReferenceEffectiveStatement)stmt).argument());
 125             } else if (stmt instanceof StatusEffectiveStatement) {
 126                 builder.setStatus(((StatusEffectiveStatement)stmt).argument());
 127             } else if (stmt instanceof UnitsEffectiveStatement) {
 128                 builder.setUnits(((UnitsEffectiveStatement)stmt).argument());
 129             } else if (stmt instanceof UnknownSchemaNode) {
 130                 // FIXME: should not directly implement, I think
 131                 builder.addUnknownSchemaNode((UnknownSchemaNode)stmt);
 132             } else if (!(stmt instanceof TypeEffectiveStatement)) {
 133                 LOG.debug("Ignoring statement {}", stmt);
 134             }
 135         }
 136
 137         final TypeDefinition<?> created = builder.build();
 138         final Object witness = TYPE_DEFINITION.compareAndExchangeRelease(this, null, created);
 139         return witness == null ? created : (TypeDefinition<?>) witness;
 140     }
 141
 142     private @NonNull ProxyTypeEffectiveStatement loadTypeStatement() {
 143         final ProxyTypeEffectiveStatement created = new ProxyTypeEffectiveStatement();
 144         final Object witness = TYPE_STATEMENT.compareAndExchangeRelease(this, null, created);
 145         return witness == null ? created : (ProxyTypeEffectiveStatement) witness;
 146     }
 147
 148     private final class ProxyTypeEffectiveStatement implements TypeEffectiveStatement<TypeStatement> {
 149         @Override
 150         public TypeStatement getDeclared() {
 151             return null;
 152         }
 153
 154         @Override
 155         public <K, V, N extends IdentifierNamespace<K, V>> Optional<? extends V> get(final Class<N> namespace,
 156                 final K identifier) {
 157             return TypedefEffectiveStatementImpl.this.get(namespace, identifier);
 158         }
 159
 160         @Override
 161         public <K, V, N extends IdentifierNamespace<K, V>> Map<K, V> getAll(final Class<N> namespace) {
 162             return TypedefEffectiveStatementImpl.this.getAll(namespace);
 163         }
 164
 165         @Override
 166         public Collection<? extends EffectiveStatement<?, ?>> effectiveSubstatements() {
 167             return TypedefEffectiveStatementImpl.this.effectiveSubstatements();
 168         }
 169
 170         @Override
 171         public String argument() {
 172             return getQName().getLocalName();
 173         }
 174
 175         @Override
 176         public StatementSource getStatementSource() {
 177             return StatementSource.CONTEXT;
 178         }
 179
 180         @Override
 181         public TypeDefinition<?> getTypeDefinition() {
 182             return TypedefEffectiveStatementImpl.this.getTypeDefinition();
 183         }
 184     }
 185 }