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

   1 /*
   2  * Copyright (c) 2020 PANTHEON.tech, 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.model.ri.stmt.impl.eff;
   9
  10 import com.google.common.collect.ImmutableList;
  11 import java.lang.invoke.MethodHandles;
  12 import java.lang.invoke.VarHandle;
  13 import org.eclipse.jdt.annotation.NonNull;
  14 import org.opendaylight.yangtools.yang.common.QName;
  15 import org.opendaylight.yangtools.yang.model.api.LeafSchemaNode;
  16 import org.opendaylight.yangtools.yang.model.api.TypeDefinition;
  17 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
  18 import org.opendaylight.yangtools.yang.model.api.stmt.LeafEffectiveStatement;
  19 import org.opendaylight.yangtools.yang.model.api.stmt.LeafStatement;
  20 import org.opendaylight.yangtools.yang.model.ri.type.ConcreteTypes;
  21 import org.opendaylight.yangtools.yang.model.spi.meta.AbstractDeclaredEffectiveStatement;
  22 import org.opendaylight.yangtools.yang.model.spi.meta.EffectiveStatementMixins.DataSchemaNodeMixin;
  23 import org.opendaylight.yangtools.yang.model.spi.meta.EffectiveStatementMixins.MandatoryMixin;
  24 import org.opendaylight.yangtools.yang.model.spi.meta.EffectiveStatementMixins.MustConstraintMixin;
  25
  26 public abstract class AbstractLeafEffectiveStatement
  27         extends AbstractDeclaredEffectiveStatement.Default<QName, LeafStatement>
  28         implements LeafEffectiveStatement, LeafSchemaNode, DataSchemaNodeMixin<LeafStatement>,
  29             MandatoryMixin<QName, LeafStatement>, MustConstraintMixin<QName, LeafStatement> {
  30     private static final VarHandle TYPE;
  31
  32     static {
  33         try {
  34             TYPE = MethodHandles.lookup().findVarHandle(AbstractLeafEffectiveStatement.class, "type",
  35                 TypeDefinition.class);
  36         } catch (NoSuchFieldException | IllegalAccessException e) {
  37             throw new ExceptionInInitializerError(e);
  38         }
  39     }
  40
  41     private final @NonNull Object substatements;
  42     private final int flags;
  43
  44     @SuppressWarnings("unused")
  45     private volatile TypeDefinition<?> type;
  46
  47     AbstractLeafEffectiveStatement(final LeafStatement declared, final int flags,
  48             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
  49         super(declared);
  50         this.flags = flags;
  51         this.substatements = maskList(substatements);
  52     }
  53
  54     AbstractLeafEffectiveStatement(final AbstractLeafEffectiveStatement original, final int flags) {
  55         super(original);
  56         this.flags = flags;
  57         substatements = original.substatements;
  58     }
  59
  60     @Override
  61     public final ImmutableList<? extends EffectiveStatement<?, ?>> effectiveSubstatements() {
  62         return unmaskList(substatements);
  63     }
  64
  65     @Override
  66     public final int flags() {
  67         return flags;
  68     }
  69
  70     @Override
  71     public final LeafEffectiveStatement asEffectiveStatement() {
  72         return this;
  73     }
  74
  75     @Override
  76     public final TypeDefinition<?> getType() {
  77         final var local = (TypeDefinition<?>) TYPE.getAcquire(this);
  78         return local != null ? local : loadType();
  79     }
  80
  81     private TypeDefinition<?> loadType() {
  82         final var ret = ConcreteTypes.typeOf(this);
  83         final var witness = (TypeDefinition<?>) TYPE.compareAndExchangeRelease(this, null, ret);
  84         return witness != null ? witness : ret;
  85     }
  86 }