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
  28 public abstract class EffectiveStatementBase<A, D extends DeclaredStatement<A>> implements EffectiveStatement<A, D> {
  29     private final List<? extends EffectiveStatement<?, ?>> substatements;
  30
  31     /**
  32      * Constructor.
  33      *
  34      * @param ctx
  35      *            context of statement.
  36      */
  37     protected EffectiveStatementBase(final StmtContext<A, D, ?> ctx) {
  38
  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         this.substatements = ImmutableList.copyOf(Collections2.transform(Collections2.filter(substatementsInit,
  57             StmtContext::isSupportedToBuildEffective), StatementContextBase::buildEffective));
  58     }
  59
  60     @Override
  61     public final <K, V, N extends IdentifierNamespace<K, V>> V get(final Class<N> namespace, final K identifier) {
  62         throw new UnsupportedOperationException("Not implemented yet.");
  63     }
  64
  65     @Override
  66     public final <K, V, N extends IdentifierNamespace<K, V>> Map<K, V> getAll(final Class<N> namespace) {
  67         throw new UnsupportedOperationException("Not implemented yet.");
  68     }
  69
  70     @Override
  71     public final Collection<? extends EffectiveStatement<?, ?>> effectiveSubstatements() {
  72         return substatements;
  73     }
  74
  75     protected final <S extends EffectiveStatement<?, ?>> S firstEffective(final Class<S> type) {
  76         final Optional<? extends EffectiveStatement<?, ?>> possible = Iterables.tryFind(substatements,
  77                 Predicates.instanceOf(type));
  78         return possible.isPresent() ? type.cast(possible.get()) : null;
  79     }
  80
  81     protected final <S extends SchemaNode> S firstSchemaNode(final Class<S> type) {
  82         final Optional<? extends EffectiveStatement<?, ?>> possible = Iterables.tryFind(substatements,
  83                 Predicates.instanceOf(type));
  84         return possible.isPresent() ? type.cast(possible.get()) : null;
  85     }
  86
  87     @SuppressWarnings("unchecked")
  88     protected final <T> Collection<T> allSubstatementsOfType(final Class<T> type) {
  89         return Collection.class.cast(Collections2.filter(substatements, Predicates.instanceOf(type)));
  90     }
  91
  92     protected final <T> T firstSubstatementOfType(final Class<T> type) {
  93         final Optional<? extends EffectiveStatement<?, ?>> possible = Iterables.tryFind(substatements,
  94                 Predicates.instanceOf(type));
  95         return possible.isPresent() ? type.cast(possible.get()) : null;
  96     }
  97
  98     protected final <R> R firstSubstatementOfType(final Class<?> type, final Class<R> returnType) {
  99         final Optional<? extends EffectiveStatement<?, ?>> possible = Iterables.tryFind(substatements,
 100                 Predicates.and(Predicates.instanceOf(type), Predicates.instanceOf(returnType)));
 101         return possible.isPresent() ? returnType.cast(possible.get()) : null;
 102     }
 103
 104     protected final EffectiveStatement<?, ?> firstEffectiveSubstatementOfType(final Class<?> type) {
 105         return Iterables.tryFind(substatements, Predicates.instanceOf(type)).orNull();
 106     }
 107 }