model/yang-model-ri/src/main/java/org/opendaylight/yangtools/yang/model/ri/stmt/impl/eff/AbstractLeafListEffectiveStatement.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 edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
  12 import java.lang.invoke.MethodHandles;
  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.LeafListSchemaNode;
  17 import org.opendaylight.yangtools.yang.model.api.TypeDefinition;
  18 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
  19 import org.opendaylight.yangtools.yang.model.api.stmt.LeafListEffectiveStatement;
  20 import org.opendaylight.yangtools.yang.model.api.stmt.LeafListStatement;
  21 import org.opendaylight.yangtools.yang.model.ri.type.ConcreteTypes;
  22 import org.opendaylight.yangtools.yang.model.spi.meta.AbstractDeclaredEffectiveStatement;
  23 import org.opendaylight.yangtools.yang.model.spi.meta.EffectiveStatementMixins.DataSchemaNodeMixin;
  24 import org.opendaylight.yangtools.yang.model.spi.meta.EffectiveStatementMixins.MustConstraintMixin;
  25 import org.opendaylight.yangtools.yang.model.spi.meta.EffectiveStatementMixins.UserOrderedAwareMixin;
  26
  27 abstract class AbstractLeafListEffectiveStatement
  28         extends AbstractDeclaredEffectiveStatement.Default<QName, LeafListStatement>
  29         implements LeafListEffectiveStatement, LeafListSchemaNode,
  30             UserOrderedAwareMixin<QName, LeafListStatement, LeafListEffectiveStatement>,
  31             DataSchemaNodeMixin<LeafListStatement>, MustConstraintMixin<QName, LeafListStatement> {
  32     private static final VarHandle TYPE;
  33
  34     static {
  35         try {
  36             TYPE = MethodHandles.lookup().findVarHandle(AbstractLeafListEffectiveStatement.class, "type",
  37                 TypeDefinition.class);
  38         } catch (NoSuchFieldException | IllegalAccessException e) {
  39             throw new ExceptionInInitializerError(e);
  40         }
  41     }
  42
  43     private final @NonNull Object substatements;
  44     private final int flags;
  45
  46     @SuppressWarnings("unused")
  47     @SuppressFBWarnings(value = "UUF_UNUSED_FIELD", justification = "https://github.com/spotbugs/spotbugs/issues/2749")
  48     private volatile TypeDefinition<?> type;
  49
  50     AbstractLeafListEffectiveStatement(final LeafListStatement declared, final int flags,
  51             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
  52         super(declared);
  53         this.substatements = maskList(substatements);
  54         this.flags = flags;
  55     }
  56
  57     AbstractLeafListEffectiveStatement(final AbstractLeafListEffectiveStatement original, final int flags) {
  58         super(original);
  59         substatements = original.substatements;
  60         this.flags = flags;
  61     }
  62
  63     @Override
  64     public final ImmutableList<? extends EffectiveStatement<?, ?>> effectiveSubstatements() {
  65         return unmaskList(substatements);
  66     }
  67
  68     @Override
  69     public final int flags() {
  70         return flags;
  71     }
  72
  73     @Override
  74     public final LeafListEffectiveStatement asEffectiveStatement() {
  75         return this;
  76     }
  77
  78     @Override
  79     public final TypeDefinition<?> getType() {
  80         final var local = (TypeDefinition<?>) TYPE.getAcquire(this);
  81         return local != null ? local : loadType();
  82     }
  83
  84     private TypeDefinition<?> loadType() {
  85         final var ret = ConcreteTypes.typeOf(this);
  86         final var witness = (TypeDefinition<?>) TYPE.compareAndExchangeRelease(this, null, ret);
  87         return witness != null ? witness : ret;
  88     }
  89 }