yang/yang-parser-impl/src/main/java/org/opendaylight/yangtools/yang/parser/stmt/rfc6020/effective/EffectiveStatementBase.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.stmt.rfc6020.effective;
   9
  10 import com.google.common.base.Optional;
  11 import com.google.common.base.Predicates;
  12 import com.google.common.collect.Collections2;
  13 import com.google.common.collect.ImmutableList;
  14 import com.google.common.collect.Iterables;
  15 import java.util.ArrayList;
  16 import java.util.Collection;
  17 import java.util.List;
  18 import java.util.Map;
  19 import org.opendaylight.yangtools.yang.model.api.Rfc6020Mapping;
  20 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
  21 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
  22 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
  23 import org.opendaylight.yangtools.yang.model.api.meta.IdentifierNamespace;
  24 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
  25 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils;
  26 import org.opendaylight.yangtools.yang.parser.stmt.reactor.StatementContextBase;
  27 import org.opendaylight.yangtools.yang.parser.stmt.rfc6020.RecursiveObjectLeaker;
  28
  29 public abstract class EffectiveStatementBase<A, D extends DeclaredStatement<A>> implements EffectiveStatement<A, D> {
  30     private final List<? extends EffectiveStatement<?, ?>> substatements;
  31
  32     /**
  33      * Constructor.
  34      *
  35      * @param ctx
  36      *            context of statement.
  37      */
  38     protected EffectiveStatementBase(final StmtContext<A, D, ?> ctx) {
  39         final Collection<StatementContextBase<?, ?, ?>> effectiveSubstatements = ctx.effectiveSubstatements();
  40         final Collection<StatementContextBase<?, ?, ?>> substatementsInit = new ArrayList<>();
  41
  42         final Collection<StatementContextBase<?, ?, ?>> supportedDeclaredSubStmts = Collections2.filter(
  43                 ctx.declaredSubstatements(), StmtContextUtils::areFeaturesSupported);
  44         for (final StatementContextBase<?, ?, ?> declaredSubstatement : supportedDeclaredSubStmts) {
  45             if (declaredSubstatement.getPublicDefinition().equals(Rfc6020Mapping.USES)) {
  46                 substatementsInit.add(declaredSubstatement);
  47                 substatementsInit.addAll(declaredSubstatement.getEffectOfStatement());
  48                 ((StatementContextBase<?, ?, ?>) ctx).removeStatementsFromEffectiveSubstatements(declaredSubstatement
  49                         .getEffectOfStatement());
  50             } else {
  51                 substatementsInit.add(declaredSubstatement);
  52             }
  53         }
  54         substatementsInit.addAll(effectiveSubstatements);
  55
  56         // WARNING: this leaks an incompletely-initialized pbject
  57         RecursiveObjectLeaker.inConstructor(this);
  58
  59         this.substatements = ImmutableList.copyOf(Collections2.transform(Collections2.filter(substatementsInit,
  60             StmtContext::isSupportedToBuildEffective), StatementContextBase::buildEffective));
  61     }
  62
  63     @Override
  64     public final <K, V, N extends IdentifierNamespace<K, V>> V get(final Class<N> namespace, final K identifier) {
  65         throw new UnsupportedOperationException("Not implemented yet.");
  66     }
  67
  68     @Override
  69     public final <K, V, N extends IdentifierNamespace<K, V>> Map<K, V> getAll(final Class<N> namespace) {
  70         throw new UnsupportedOperationException("Not implemented yet.");
  71     }
  72
  73     @Override
  74     public final Collection<? extends EffectiveStatement<?, ?>> effectiveSubstatements() {
  75         return substatements;
  76     }
  77
  78     protected final <S extends EffectiveStatement<?, ?>> S firstEffective(final Class<S> type) {
  79         final Optional<? extends EffectiveStatement<?, ?>> possible = Iterables.tryFind(substatements,
  80                 Predicates.instanceOf(type));
  81         return possible.isPresent() ? type.cast(possible.get()) : null;
  82     }
  83
  84     protected final <S extends SchemaNode> S firstSchemaNode(final Class<S> type) {
  85         final Optional<? extends EffectiveStatement<?, ?>> possible = Iterables.tryFind(substatements,
  86                 Predicates.instanceOf(type));
  87         return possible.isPresent() ? type.cast(possible.get()) : null;
  88     }
  89
  90     @SuppressWarnings("unchecked")
  91     protected final <T> Collection<T> allSubstatementsOfType(final Class<T> type) {
  92         return Collection.class.cast(Collections2.filter(substatements, Predicates.instanceOf(type)));
  93     }
  94
  95     protected final <T> T firstSubstatementOfType(final Class<T> type) {
  96         final Optional<? extends EffectiveStatement<?, ?>> possible = Iterables.tryFind(substatements,
  97                 Predicates.instanceOf(type));
  98         return possible.isPresent() ? type.cast(possible.get()) : null;
  99     }
 100
 101     protected final <R> R firstSubstatementOfType(final Class<?> type, final Class<R> returnType) {
 102         final Optional<? extends EffectiveStatement<?, ?>> possible = Iterables.tryFind(substatements,
 103                 Predicates.and(Predicates.instanceOf(type), Predicates.instanceOf(returnType)));
 104         return possible.isPresent() ? returnType.cast(possible.get()) : null;
 105     }
 106
 107     protected final EffectiveStatement<?, ?> firstEffectiveSubstatementOfType(final Class<?> type) {
 108         return Iterables.tryFind(substatements, Predicates.instanceOf(type)).orNull();
 109     }
 110 }