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 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils;
  26
  27 abstract class AbstractCaseStatementSupport
  28         extends BaseImplicitStatementSupport<CaseStatement, CaseEffectiveStatement> {
  29     AbstractCaseStatementSupport() {
  30         super(YangStmtMapping.CASE);
  31     }
  32
  33     @Override
  34     public final QName parseArgumentValue(final StmtContext<?, ?, ?> ctx, final String value) {
  35         return StmtContextUtils.parseIdentifier(ctx, value);
  36     }
  37
  38     @Override
  39     protected final CaseStatement createDeclared(final StmtContext<QName, CaseStatement, ?> ctx,
  40             final ImmutableList<? extends DeclaredStatement<?>> substatements) {
  41         final StatementSource source = ctx.getStatementSource();
  42         switch (ctx.getStatementSource()) {
  43             case CONTEXT:
  44                 return new RegularUndeclaredCaseStatement(ctx.coerceStatementArgument(), substatements);
  45             case DECLARATION:
  46                 return new RegularCaseStatement(ctx.coerceStatementArgument(), substatements);
  47             default:
  48                 throw new IllegalStateException("Unhandled statement source " + source);
  49         }
  50     }
  51
  52     @Override
  53     protected final CaseStatement createEmptyDeclared(final StmtContext<QName, CaseStatement, ?> ctx) {
  54         final StatementSource source = ctx.getStatementSource();
  55         switch (ctx.getStatementSource()) {
  56             case CONTEXT:
  57                 return new EmptyUndeclaredCaseStatement(ctx.coerceStatementArgument());
  58             case DECLARATION:
  59                 return new EmptyCaseStatement(ctx.coerceStatementArgument());
  60             default:
  61                 throw new IllegalStateException("Unhandled statement source " + source);
  62         }
  63     }
  64
  65     @Override
  66     protected final CaseEffectiveStatement createDeclaredEffective(
  67             final StmtContext<QName, CaseStatement, CaseEffectiveStatement> ctx,
  68             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements, final CaseStatement declared) {
  69         return new DeclaredCaseEffectiveStatement(declared, ctx, substatements, computeFlags(ctx, substatements),
  70             findOriginal(ctx));
  71     }
  72
  73     @Override
  74     protected final CaseEffectiveStatement createUndeclaredEffective(
  75             final StmtContext<QName, CaseStatement, CaseEffectiveStatement> ctx,
  76             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
  77         return new UndeclaredCaseEffectiveStatement(ctx, substatements, computeFlags(ctx, substatements),
  78             findOriginal(ctx));
  79     }
  80
  81     private static @Nullable CaseSchemaNode findOriginal(final StmtContext<?, ?, ?> ctx) {
  82         return (CaseSchemaNode) ctx.getOriginalCtx().map(StmtContext::buildEffective).orElse(null);
  83     }
  84
  85     private static int computeFlags(final StmtContext<?, ?, ?> ctx,
  86             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
  87         return new FlagsBuilder()
  88                 .setHistory(ctx.getCopyHistory())
  89                 .setStatus(findFirstArgument(substatements, StatusEffectiveStatement.class, Status.CURRENT))
  90                 .setConfiguration(ctx.isConfiguration()
  91                     && ctx.allSubstatementsStream().anyMatch(StmtContext::isConfiguration))
  92                 .toFlags();
  93     }
  94 }