yang/yang-parser-rfc7950/src/main/java/org/opendaylight/yangtools/yang/parser/rfc7950/stmt/meta/CaseStatementSupport.java

   1 /*
   2  * Copyright (c) 2017 Pantheon Technologies, 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.parser.rfc7950.stmt.meta;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import com.google.common.annotations.Beta;
  13 import com.google.common.collect.ImmutableList;
  14 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
  15 import java.util.Collection;
  16 import java.util.Optional;
  17 import org.eclipse.jdt.annotation.NonNull;
  18 import org.eclipse.jdt.annotation.Nullable;
  19 import org.opendaylight.yangtools.yang.common.QName;
  20 import org.opendaylight.yangtools.yang.model.api.CaseSchemaNode;
  21 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
  22 import org.opendaylight.yangtools.yang.model.api.Status;
  23 import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
  24 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
  25 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
  26 import org.opendaylight.yangtools.yang.model.api.meta.StatementSource;
  27 import org.opendaylight.yangtools.yang.model.api.stmt.CaseEffectiveStatement;
  28 import org.opendaylight.yangtools.yang.model.api.stmt.CaseStatement;
  29 import org.opendaylight.yangtools.yang.model.api.stmt.StatusEffectiveStatement;
  30 import org.opendaylight.yangtools.yang.model.ri.stmt.DeclaredStatements;
  31 import org.opendaylight.yangtools.yang.model.ri.stmt.EffectiveStatements;
  32 import org.opendaylight.yangtools.yang.model.ri.stmt.ImplicitStatements;
  33 import org.opendaylight.yangtools.yang.model.spi.meta.EffectiveStatementMixins.EffectiveStatementWithFlags.FlagsBuilder;
  34 import org.opendaylight.yangtools.yang.model.spi.meta.SubstatementIndexingException;
  35 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.BaseImplicitStatementSupport;
  36 import org.opendaylight.yangtools.yang.parser.spi.meta.EffectiveStmtCtx.Current;
  37 import org.opendaylight.yangtools.yang.parser.spi.meta.EffectiveStmtCtx.Parent.EffectiveConfig;
  38 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
  39 import org.opendaylight.yangtools.yang.parser.spi.meta.SubstatementValidator;
  40 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
  41
  42 @Beta
  43 public final class CaseStatementSupport
  44         extends BaseImplicitStatementSupport<CaseStatement, CaseEffectiveStatement> {
  45     private static final @NonNull CaseStatementSupport RFC6020_INSTANCE = new CaseStatementSupport(
  46         SubstatementValidator.builder(YangStmtMapping.CASE)
  47             .addAny(YangStmtMapping.ANYXML)
  48             .addAny(YangStmtMapping.CHOICE)
  49             .addAny(YangStmtMapping.CONTAINER)
  50             .addOptional(YangStmtMapping.DESCRIPTION)
  51             .addAny(YangStmtMapping.IF_FEATURE)
  52             .addAny(YangStmtMapping.LEAF)
  53             .addAny(YangStmtMapping.LEAF_LIST)
  54             .addAny(YangStmtMapping.LIST)
  55             .addOptional(YangStmtMapping.REFERENCE)
  56             .addOptional(YangStmtMapping.STATUS)
  57             .addAny(YangStmtMapping.USES)
  58             .addOptional(YangStmtMapping.WHEN)
  59             .build());
  60     private static final @NonNull CaseStatementSupport RFC7950_INSTANCE = new CaseStatementSupport(
  61         SubstatementValidator.builder(YangStmtMapping.CASE)
  62             .addAny(YangStmtMapping.ANYDATA)
  63             .addAny(YangStmtMapping.ANYXML)
  64             .addAny(YangStmtMapping.CHOICE)
  65             .addAny(YangStmtMapping.CONTAINER)
  66             .addOptional(YangStmtMapping.DESCRIPTION)
  67             .addAny(YangStmtMapping.IF_FEATURE)
  68             .addAny(YangStmtMapping.LEAF)
  69             .addAny(YangStmtMapping.LEAF_LIST)
  70             .addAny(YangStmtMapping.LIST)
  71             .addOptional(YangStmtMapping.REFERENCE)
  72             .addOptional(YangStmtMapping.STATUS)
  73             .addAny(YangStmtMapping.USES)
  74             .addOptional(YangStmtMapping.WHEN)
  75             .build());
  76
  77     private final SubstatementValidator validator;
  78
  79     private CaseStatementSupport(final SubstatementValidator validator) {
  80         super(YangStmtMapping.CASE, instantiatedPolicy());
  81         this.validator = requireNonNull(validator);
  82     }
  83
  84     public static @NonNull CaseStatementSupport rfc6020Instance() {
  85         return RFC6020_INSTANCE;
  86     }
  87
  88     public static @NonNull CaseStatementSupport rfc7950Instance() {
  89         return RFC7950_INSTANCE;
  90     }
  91
  92     @Override
  93     protected SubstatementValidator getSubstatementValidator() {
  94         return validator;
  95     }
  96
  97     @Override
  98     protected CaseStatement createDeclared(final StmtContext<QName, CaseStatement, ?> ctx,
  99             final ImmutableList<? extends DeclaredStatement<?>> substatements) {
 100         final StatementSource source = ctx.source();
 101         switch (source) {
 102             case CONTEXT:
 103                 return ImplicitStatements.createCase(ctx.getArgument(), substatements);
 104             case DECLARATION:
 105                 return DeclaredStatements.createCase(ctx.getArgument(), substatements);
 106             default:
 107                 throw new IllegalStateException("Unhandled statement source " + source);
 108         }
 109     }
 110
 111     @Override
 112     protected CaseEffectiveStatement copyDeclaredEffective(final Current<QName, CaseStatement> stmt,
 113             final CaseEffectiveStatement original) {
 114         return EffectiveStatements.copyCase(original, stmt.effectivePath(),
 115             computeFlags(stmt, original.effectiveSubstatements()), stmt.original(CaseSchemaNode.class));
 116     }
 117
 118     @Override
 119     protected CaseEffectiveStatement copyUndeclaredEffective(final Current<QName, CaseStatement> stmt,
 120             final CaseEffectiveStatement original) {
 121         return EffectiveStatements.copyCase(original, stmt.effectivePath(),
 122             computeFlags(stmt, original.effectiveSubstatements()), stmt.original(CaseSchemaNode.class));
 123     }
 124
 125     @Override
 126     protected CaseEffectiveStatement createDeclaredEffective(final Current<QName, CaseStatement> stmt,
 127             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
 128         try {
 129             return EffectiveStatements.createCase(stmt.declared(), stmt.effectivePath(),
 130                 computeFlags(stmt, substatements), substatements, stmt.original(CaseSchemaNode.class));
 131         } catch (SubstatementIndexingException e) {
 132             throw new SourceException(e.getMessage(), stmt, e);
 133         }
 134     }
 135
 136     @Override
 137     protected CaseEffectiveStatement createUndeclaredEffective(final Current<QName, CaseStatement> stmt,
 138             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
 139         try {
 140             return EffectiveStatements.createCase(stmt.effectivePath(), computeFlags(stmt, substatements),
 141                 substatements, stmt.original(CaseSchemaNode.class));
 142         } catch (SubstatementIndexingException e) {
 143             throw new SourceException(e.getMessage(), stmt, e);
 144         }
 145     }
 146
 147     private static int computeFlags(final Current<?, ?> stmt,
 148             final Collection<? extends EffectiveStatement<?, ?>> substatements) {
 149         final Boolean config;
 150         final EffectiveConfig effective = stmt.effectiveConfig();
 151         switch (effective) {
 152             case FALSE:
 153                 config = Boolean.FALSE;
 154                 break;
 155             case IGNORED:
 156                 config = null;
 157                 break;
 158             case TRUE:
 159                 final Boolean sub = substatementEffectiveConfig(substatements);
 160                 config = sub != null ? sub : Boolean.TRUE;
 161                 break;
 162             case UNDETERMINED:
 163                 config = substatementEffectiveConfig(substatements);
 164                 break;
 165             default:
 166                 throw new IllegalStateException("Unhandled effective config " + effective);
 167         }
 168
 169         return new FlagsBuilder()
 170                 .setHistory(stmt.history())
 171                 .setStatus(findFirstArgument(substatements, StatusEffectiveStatement.class, Status.CURRENT))
 172                 .setConfiguration(config)
 173                 .toFlags();
 174     }
 175
 176     @SuppressFBWarnings(value = "NP_BOOLEAN_RETURN_NULL", justification = "Internal use tagged with @Nullable")
 177     private static @Nullable Boolean substatementEffectiveConfig(
 178             final Collection<? extends EffectiveStatement<?, ?>> substatements) {
 179         for (EffectiveStatement<?, ?> stmt : substatements) {
 180             if (stmt instanceof DataSchemaNode) {
 181                 final Optional<Boolean> opt = ((DataSchemaNode) stmt).effectiveConfig();
 182                 if (opt.isPresent()) {
 183                     return opt.orElseThrow();
 184                 }
 185             }
 186         }
 187         return null;
 188     }
 189 }