yang/yang-parser-rfc7950/src/main/java/org/opendaylight/yangtools/yang/parser/rfc7950/stmt/case_/AbstractCaseStatementSupport.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.case_;
   9
  10 import com.google.common.collect.ImmutableList;
  11 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
  12 import java.util.Optional;
  13 import org.eclipse.jdt.annotation.Nullable;
  14 import org.opendaylight.yangtools.yang.common.QName;
  15 import org.opendaylight.yangtools.yang.model.api.CaseSchemaNode;
  16 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
  17 import org.opendaylight.yangtools.yang.model.api.Status;
  18 import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
  19 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
  20 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
  21 import org.opendaylight.yangtools.yang.model.api.meta.StatementSource;
  22 import org.opendaylight.yangtools.yang.model.api.stmt.CaseEffectiveStatement;
  23 import org.opendaylight.yangtools.yang.model.api.stmt.CaseStatement;
  24 import org.opendaylight.yangtools.yang.model.api.stmt.StatusEffectiveStatement;
  25 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.BaseImplicitStatementSupport;
  26 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.EffectiveStatementMixins.EffectiveStatementWithFlags.FlagsBuilder;
  27 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.SubstatementIndexingException;
  28 import org.opendaylight.yangtools.yang.parser.spi.meta.EffectiveStmtCtx.Current;
  29 import org.opendaylight.yangtools.yang.parser.spi.meta.EffectiveStmtCtx.Parent.EffectiveConfig;
  30 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
  31 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
  32
  33 abstract class AbstractCaseStatementSupport
  34         extends BaseImplicitStatementSupport<CaseStatement, CaseEffectiveStatement> {
  35     AbstractCaseStatementSupport() {
  36         super(YangStmtMapping.CASE);
  37     }
  38
  39     @Override
  40     protected final CaseStatement createDeclared(final StmtContext<QName, CaseStatement, ?> ctx,
  41             final ImmutableList<? extends DeclaredStatement<?>> substatements) {
  42         final StatementSource source = ctx.source();
  43         switch (source) {
  44             case CONTEXT:
  45                 return new RegularUndeclaredCaseStatement(ctx.getArgument(), substatements);
  46             case DECLARATION:
  47                 return new RegularCaseStatement(ctx.getArgument(), substatements);
  48             default:
  49                 throw new IllegalStateException("Unhandled statement source " + source);
  50         }
  51     }
  52
  53     @Override
  54     protected final CaseStatement createEmptyDeclared(final StmtContext<QName, CaseStatement, ?> ctx) {
  55         final StatementSource source = ctx.source();
  56         switch (source) {
  57             case CONTEXT:
  58                 return new EmptyUndeclaredCaseStatement(ctx.getArgument());
  59             case DECLARATION:
  60                 return new EmptyCaseStatement(ctx.getArgument());
  61             default:
  62                 throw new IllegalStateException("Unhandled statement source " + source);
  63         }
  64     }
  65
  66     @Override
  67     protected final CaseEffectiveStatement createDeclaredEffective(final Current<QName, CaseStatement> stmt,
  68             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
  69         try {
  70             return new DeclaredCaseEffectiveStatement(stmt.declared(), substatements, computeFlags(stmt, substatements),
  71                 stmt.wrapSchemaPath(), findOriginal(stmt));
  72         } catch (SubstatementIndexingException e) {
  73             throw new SourceException(e.getMessage(), stmt, e);
  74         }
  75     }
  76
  77     @Override
  78     protected final CaseEffectiveStatement createUndeclaredEffective(final Current<QName, CaseStatement> stmt,
  79             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
  80         try {
  81             return new UndeclaredCaseEffectiveStatement(substatements, computeFlags(stmt, substatements),
  82                 stmt.wrapSchemaPath(), findOriginal(stmt));
  83         } catch (SubstatementIndexingException e) {
  84             throw new SourceException(e.getMessage(), stmt, e);
  85         }
  86     }
  87
  88     private static @Nullable CaseSchemaNode findOriginal(final Current<?, ?> stmt) {
  89         return (CaseSchemaNode) stmt.original();
  90     }
  91
  92     private static int computeFlags(final Current<?, ?> stmt,
  93             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
  94         final Boolean config;
  95         final EffectiveConfig effective = stmt.effectiveConfig();
  96         switch (effective) {
  97             case FALSE:
  98                 config = Boolean.FALSE;
  99                 break;
 100             case IGNORED:
 101                 config = null;
 102                 break;
 103             case TRUE:
 104                 final Boolean sub = substatementEffectiveConfig(substatements);
 105                 config = sub != null ? sub : Boolean.TRUE;
 106                 break;
 107             case UNDETERMINED:
 108                 config = substatementEffectiveConfig(substatements);
 109                 break;
 110             default:
 111                 throw new IllegalStateException("Unhandled effective config " + effective);
 112         }
 113
 114         return new FlagsBuilder()
 115                 .setHistory(stmt.history())
 116                 .setStatus(findFirstArgument(substatements, StatusEffectiveStatement.class, Status.CURRENT))
 117                 .setConfiguration(config)
 118                 .toFlags();
 119     }
 120
 121     @SuppressFBWarnings(value = "NP_BOOLEAN_RETURN_NULL", justification = "Internal use tagged with @Nullable")
 122     private static @Nullable Boolean substatementEffectiveConfig(
 123             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
 124         for (EffectiveStatement<?, ?> stmt : substatements) {
 125             if (stmt instanceof DataSchemaNode) {
 126                 final Optional<Boolean> opt = ((DataSchemaNode) stmt).effectiveConfig();
 127                 if (opt.isPresent()) {
 128                     return opt.orElseThrow();
 129                 }
 130             }
 131         }
 132         return null;
 133     }
 134 }