yang/yang-parser-rfc7950/src/main/java/org/opendaylight/yangtools/yang/parser/rfc7950/stmt/type/Decimal64SpecificationSupport.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.FractionDigitsEffectiveStatement;
  15 import org.opendaylight.yangtools.yang.model.api.stmt.RangeEffectiveStatement;
  16 import org.opendaylight.yangtools.yang.model.api.stmt.TypeStatement.Decimal64Specification;
  17 import org.opendaylight.yangtools.yang.model.ri.type.BaseTypes;
  18 import org.opendaylight.yangtools.yang.model.ri.type.DecimalTypeBuilder;
  19 import org.opendaylight.yangtools.yang.parser.spi.meta.AbstractStringStatementSupport;
  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.meta.SubstatementValidator;
  24 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
  25
  26 final class Decimal64SpecificationSupport extends AbstractStringStatementSupport<Decimal64Specification,
  27         EffectiveStatement<String, Decimal64Specification>> {
  28     private static final SubstatementValidator SUBSTATEMENT_VALIDATOR = SubstatementValidator.builder(
  29         YangStmtMapping.TYPE)
  30         .addMandatory(YangStmtMapping.FRACTION_DIGITS)
  31         .addOptional(YangStmtMapping.RANGE)
  32         .build();
  33
  34     Decimal64SpecificationSupport() {
  35         super(YangStmtMapping.TYPE, StatementPolicy.exactReplica());
  36     }
  37
  38     @Override
  39     protected SubstatementValidator getSubstatementValidator() {
  40         return SUBSTATEMENT_VALIDATOR;
  41     }
  42
  43     @Override
  44     protected Decimal64Specification createDeclared(final StmtContext<String, Decimal64Specification, ?> ctx,
  45             final ImmutableList<? extends DeclaredStatement<?>> substatements) {
  46         return new Decimal64SpecificationImpl(ctx.getRawArgument(), substatements);
  47     }
  48
  49     @Override
  50     protected Decimal64Specification createEmptyDeclared(final StmtContext<String, Decimal64Specification, ?> ctx) {
  51         throw noFracDigits(ctx);
  52     }
  53
  54     @Override
  55     protected EffectiveStatement<String, Decimal64Specification> createEffective(
  56             final Current<String, Decimal64Specification> stmt,
  57             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
  58         if (substatements.isEmpty()) {
  59             throw noFracDigits(stmt);
  60         }
  61
  62         final DecimalTypeBuilder builder = BaseTypes.decimalTypeBuilder(stmt.argumentAsTypeQName());
  63         for (final EffectiveStatement<?, ?> subStmt : substatements) {
  64             if (subStmt instanceof FractionDigitsEffectiveStatement) {
  65                 builder.setFractionDigits(((FractionDigitsEffectiveStatement) subStmt).argument());
  66             }
  67             if (subStmt instanceof RangeEffectiveStatement) {
  68                 final RangeEffectiveStatement range = (RangeEffectiveStatement) subStmt;
  69                 builder.setRangeConstraint(range, range.argument());
  70             }
  71         }
  72
  73         return new TypeEffectiveStatementImpl<>(stmt.declared(), substatements, builder);
  74     }
  75
  76     private static SourceException noFracDigits(final CommonStmtCtx stmt) {
  77         /*
  78          *  https://tools.ietf.org/html/rfc7950#section-9.3.4
  79          *
  80          *     The "fraction-digits" statement, which is a substatement to the
  81          *     "type" statement, MUST be present if the type is "decimal64".
  82          */
  83         return new SourceException("At least one fraction-digits statement has to be present", stmt);
  84     }
  85 }