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.common.QName;
  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.ri.type.BaseTypes;
  18 import org.opendaylight.yangtools.yang.model.ri.type.LeafrefTypeBuilder;
  19 import org.opendaylight.yangtools.yang.parser.spi.meta.CommonStmtCtx;
  20 import org.opendaylight.yangtools.yang.parser.spi.meta.EffectiveStmtCtx.Current;
  21 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
  22 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
  23
  24 abstract class AbstractLeafrefSpecificationSupport extends AbstractTypeSupport<LeafrefSpecification> {
  25     @Override
  26     protected final LeafrefSpecification createDeclared(final StmtContext<QName, LeafrefSpecification, ?> ctx,
  27             final ImmutableList<? extends DeclaredStatement<?>> substatements) {
  28         if (substatements.isEmpty()) {
  29             throw noPath(ctx);
  30         }
  31         return new LeafrefSpecificationImpl(ctx.getRawArgument(), ctx.getArgument(), substatements);
  32     }
  33
  34     @Override
  35     protected EffectiveStatement<QName, LeafrefSpecification> createEffective(
  36             final Current<QName, LeafrefSpecification> stmt,
  37             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
  38         if (substatements.isEmpty()) {
  39             throw noPath(stmt);
  40         }
  41
  42         final LeafrefTypeBuilder builder = BaseTypes.leafrefTypeBuilder(stmt.argumentAsTypeQName());
  43
  44         for (final EffectiveStatement<?, ?> subStmt : substatements) {
  45             if (subStmt instanceof PathEffectiveStatement) {
  46                 builder.setPathStatement(((PathEffectiveStatement) subStmt).argument());
  47             } else if (subStmt instanceof RequireInstanceEffectiveStatement) {
  48                 builder.setRequireInstance(((RequireInstanceEffectiveStatement)subStmt).argument());
  49             }
  50         }
  51
  52         return new TypeEffectiveStatementImpl<>(stmt.declared(), substatements, builder);
  53     }
  54
  55     private static SourceException noPath(final CommonStmtCtx stmt) {
  56         /*
  57          *  https://tools.ietf.org/html/rfc7950#section-9.12
  58          *
  59          *     When the type is "union", the "type" statement (Section 7.4) MUST be
  60          *     present.
  61          */
  62         return new SourceException("A path statement has to be present", stmt);
  63     }
  64 }