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