yang/yang-parser-rfc7950/src/main/java/org/opendaylight/yangtools/yang/parser/rfc7950/stmt/type/AbstractLeafrefSpecificationSupport.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.type;
   9
  10 import com.google.common.collect.ImmutableList;
  11 import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
  12 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
  13 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
  14 import org.opendaylight.yangtools.yang.model.api.stmt.PathEffectiveStatement;
  15 import org.opendaylight.yangtools.yang.model.api.stmt.RequireInstanceEffectiveStatement;
  16 import org.opendaylight.yangtools.yang.model.api.stmt.TypeStatement.LeafrefSpecification;
  17 import org.opendaylight.yangtools.yang.model.util.type.BaseTypes;
  18 import org.opendaylight.yangtools.yang.model.util.type.LeafrefTypeBuilder;
  19 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.BaseStatementSupport;
  20 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
  21 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
  22
  23 abstract class AbstractLeafrefSpecificationSupport
  24         extends BaseStatementSupport<String, LeafrefSpecification, EffectiveStatement<String, LeafrefSpecification>> {
  25     AbstractLeafrefSpecificationSupport() {
  26         super(YangStmtMapping.TYPE);
  27     }
  28
  29     @Override
  30     public final String parseArgumentValue(final StmtContext<?, ?, ?> ctx, final String value) {
  31         return value;
  32     }
  33
  34     @Override
  35     protected final LeafrefSpecification createDeclared(final StmtContext<String, LeafrefSpecification, ?> ctx,
  36             final ImmutableList<? extends DeclaredStatement<?>> substatements) {
  37         return new LeafrefSpecificationImpl(ctx, substatements);
  38     }
  39
  40     @Override
  41     protected final LeafrefSpecification createEmptyDeclared(final StmtContext<String, LeafrefSpecification, ?> ctx) {
  42         throw noPath(ctx);
  43     }
  44
  45     @Override
  46     protected final EffectiveStatement<String, LeafrefSpecification> createEffective(
  47             final StmtContext<String, LeafrefSpecification, EffectiveStatement<String, LeafrefSpecification>> ctx,
  48             final LeafrefSpecification declared,
  49             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
  50         final LeafrefTypeBuilder builder = BaseTypes.leafrefTypeBuilder(ctx.getSchemaPath().get());
  51
  52         for (final EffectiveStatement<?, ?> stmt : substatements) {
  53             if (stmt instanceof PathEffectiveStatement) {
  54                 builder.setPathStatement(((PathEffectiveStatement) stmt).argument());
  55             } else if (stmt instanceof RequireInstanceEffectiveStatement) {
  56                 builder.setRequireInstance(((RequireInstanceEffectiveStatement)stmt).argument());
  57             }
  58         }
  59
  60         return new TypeEffectiveStatementImpl<>(declared, substatements, builder);
  61     }
  62
  63     @Override
  64     protected final EffectiveStatement<String, LeafrefSpecification> createEmptyEffective(
  65             final StmtContext<String, LeafrefSpecification, EffectiveStatement<String, LeafrefSpecification>> ctx,
  66             final LeafrefSpecification declared) {
  67         throw noPath(ctx);
  68     }
  69
  70     private static SourceException noPath(final StmtContext<?, ?, ?> ctx) {
  71         /*
  72          *  https://tools.ietf.org/html/rfc7950#section-9.12
  73          *
  74          *     When the type is "union", the "type" statement (Section 7.4) MUST be
  75          *     present.
  76          */
  77         return new SourceException("A path statement has to be present", ctx.getStatementSourceReference());
  78     }
  79 }