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 org.eclipse.jdt.annotation.Nullable;
  12 import org.opendaylight.yangtools.yang.common.QName;
  13 import org.opendaylight.yangtools.yang.model.api.CaseSchemaNode;
  14 import org.opendaylight.yangtools.yang.model.api.Status;
  15 import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
  16 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
  17 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
  18 import org.opendaylight.yangtools.yang.model.api.meta.StatementSource;
  19 import org.opendaylight.yangtools.yang.model.api.stmt.CaseEffectiveStatement;
  20 import org.opendaylight.yangtools.yang.model.api.stmt.CaseStatement;
  21 import org.opendaylight.yangtools.yang.model.api.stmt.StatusEffectiveStatement;
  22 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.BaseImplicitStatementSupport;
  23 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.EffectiveStatementMixins.EffectiveStatementWithFlags.FlagsBuilder;
  24 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
  25
  26 abstract class AbstractCaseStatementSupport
  27         extends BaseImplicitStatementSupport<CaseStatement, CaseEffectiveStatement> {
  28     AbstractCaseStatementSupport() {
  29         super(YangStmtMapping.CASE);
  30     }
  31
  32     @Override
  33     protected final CaseStatement createDeclared(final StmtContext<QName, CaseStatement, ?> ctx,
  34             final ImmutableList<? extends DeclaredStatement<?>> substatements) {
  35         final StatementSource source = ctx.getStatementSource();
  36         switch (ctx.getStatementSource()) {
  37             case CONTEXT:
  38                 return new RegularUndeclaredCaseStatement(ctx.coerceStatementArgument(), substatements);
  39             case DECLARATION:
  40                 return new RegularCaseStatement(ctx.coerceStatementArgument(), substatements);
  41             default:
  42                 throw new IllegalStateException("Unhandled statement source " + source);
  43         }
  44     }
  45
  46     @Override
  47     protected final CaseStatement createEmptyDeclared(final StmtContext<QName, CaseStatement, ?> ctx) {
  48         final StatementSource source = ctx.getStatementSource();
  49         switch (ctx.getStatementSource()) {
  50             case CONTEXT:
  51                 return new EmptyUndeclaredCaseStatement(ctx.coerceStatementArgument());
  52             case DECLARATION:
  53                 return new EmptyCaseStatement(ctx.coerceStatementArgument());
  54             default:
  55                 throw new IllegalStateException("Unhandled statement source " + source);
  56         }
  57     }
  58
  59     @Override
  60     protected final CaseEffectiveStatement createDeclaredEffective(
  61             final StmtContext<QName, CaseStatement, CaseEffectiveStatement> ctx,
  62             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements, final CaseStatement declared) {
  63         return new DeclaredCaseEffectiveStatement(declared, ctx, substatements, computeFlags(ctx, substatements),
  64             findOriginal(ctx));
  65     }
  66
  67     @Override
  68     protected final CaseEffectiveStatement createUndeclaredEffective(
  69             final StmtContext<QName, CaseStatement, CaseEffectiveStatement> ctx,
  70             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
  71         return new UndeclaredCaseEffectiveStatement(ctx, substatements, computeFlags(ctx, substatements),
  72             findOriginal(ctx));
  73     }
  74
  75     private static @Nullable CaseSchemaNode findOriginal(final StmtContext<?, ?, ?> ctx) {
  76         return (CaseSchemaNode) ctx.getOriginalCtx().map(StmtContext::buildEffective).orElse(null);
  77     }
  78
  79     private static int computeFlags(final StmtContext<?, ?, ?> ctx,
  80             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
  81         return new FlagsBuilder()
  82                 .setHistory(ctx.getCopyHistory())
  83                 .setStatus(findFirstArgument(substatements, StatusEffectiveStatement.class, Status.CURRENT))
  84                 .setConfiguration(ctx.isConfiguration()
  85                     && ctx.allSubstatementsStream().anyMatch(StmtContext::isConfiguration))
  86                 .toFlags();
  87     }
  88 }