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