yang/yang-parser-rfc7950/src/main/java/org/opendaylight/yangtools/yang/parser/rfc7950/stmt/units/UnitsStatementSupport.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.units;
   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.UnitsEffectiveStatement;
  15 import org.opendaylight.yangtools.yang.model.api.stmt.UnitsStatement;
  16 import org.opendaylight.yangtools.yang.model.spi.stmt.DeclaredStatements;
  17 import org.opendaylight.yangtools.yang.parser.spi.meta.AbstractStringStatementSupport;
  18 import org.opendaylight.yangtools.yang.parser.spi.meta.EffectiveStmtCtx.Current;
  19 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
  20 import org.opendaylight.yangtools.yang.parser.spi.meta.SubstatementValidator;
  21
  22 public final class UnitsStatementSupport
  23         extends AbstractStringStatementSupport<UnitsStatement, UnitsEffectiveStatement> {
  24     private static final SubstatementValidator SUBSTATEMENT_VALIDATOR = SubstatementValidator.builder(
  25         YangStmtMapping.UNITS)
  26         .build();
  27     private static final UnitsStatementSupport INSTANCE = new UnitsStatementSupport();
  28
  29     private UnitsStatementSupport() {
  30         super(YangStmtMapping.UNITS, StatementPolicy.contextIndependent());
  31     }
  32
  33     public static UnitsStatementSupport getInstance() {
  34         return INSTANCE;
  35     }
  36
  37     @Override
  38     protected SubstatementValidator getSubstatementValidator() {
  39         return SUBSTATEMENT_VALIDATOR;
  40     }
  41
  42     @Override
  43     protected UnitsStatement createDeclared(final StmtContext<String, UnitsStatement, ?> ctx,
  44             final ImmutableList<? extends DeclaredStatement<?>> substatements) {
  45         return DeclaredStatements.createUnits(ctx.getRawArgument(), substatements);
  46     }
  47
  48     @Override
  49     protected UnitsStatement createEmptyDeclared(final StmtContext<String, UnitsStatement, ?> ctx) {
  50         return DeclaredStatements.createUnits(ctx.getRawArgument());
  51     }
  52
  53     @Override
  54     protected UnitsEffectiveStatement createEffective(final Current<String, UnitsStatement> stmt,
  55             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
  56         return substatements.isEmpty() ? new EmptyUnitsEffectiveStatement(stmt.declared())
  57             : new RegularUnitsEffectiveStatement(stmt.declared(), substatements);
  58     }
  59 }