yang/yang-parser-rfc7950/src/main/java/org/opendaylight/yangtools/yang/parser/rfc7950/stmt/meta/YangVersionStatementSupport.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.meta;
   9
  10 import com.google.common.collect.ImmutableList;
  11 import org.opendaylight.yangtools.yang.common.YangVersion;
  12 import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
  13 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
  14 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
  15 import org.opendaylight.yangtools.yang.model.api.stmt.YangVersionEffectiveStatement;
  16 import org.opendaylight.yangtools.yang.model.api.stmt.YangVersionStatement;
  17 import org.opendaylight.yangtools.yang.model.ri.stmt.DeclaredStatements;
  18 import org.opendaylight.yangtools.yang.model.ri.stmt.EffectiveStatements;
  19 import org.opendaylight.yangtools.yang.parser.spi.meta.AbstractStatementSupport;
  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.meta.StmtContext.Mutable;
  23 import org.opendaylight.yangtools.yang.parser.spi.meta.SubstatementValidator;
  24 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
  25
  26 public final class YangVersionStatementSupport
  27         extends AbstractStatementSupport<YangVersion, YangVersionStatement, YangVersionEffectiveStatement> {
  28     private static final SubstatementValidator SUBSTATEMENT_VALIDATOR =
  29         SubstatementValidator.builder(YangStmtMapping.YANG_VERSION).build();
  30     private static final YangVersionStatementSupport INSTANCE = new YangVersionStatementSupport();
  31
  32     private YangVersionStatementSupport() {
  33         super(YangStmtMapping.YANG_VERSION, StatementPolicy.reject());
  34     }
  35
  36     public static YangVersionStatementSupport getInstance() {
  37         return INSTANCE;
  38     }
  39
  40     @Override
  41     public YangVersion parseArgumentValue(final StmtContext<?, ?, ?> ctx, final String value) {
  42         return SourceException.unwrap(YangVersion.parse(value), ctx,  "Unsupported YANG version %s", value);
  43     }
  44
  45     @Override
  46     public void onPreLinkageDeclared(
  47             final Mutable<YangVersion, YangVersionStatement, YangVersionEffectiveStatement> stmt) {
  48         stmt.setRootVersion(stmt.argument());
  49     }
  50
  51     @Override
  52     protected SubstatementValidator getSubstatementValidator() {
  53         return SUBSTATEMENT_VALIDATOR;
  54     }
  55
  56     @Override
  57     protected YangVersionStatement createDeclared(final StmtContext<YangVersion, YangVersionStatement, ?> ctx,
  58             final ImmutableList<? extends DeclaredStatement<?>> substatements) {
  59         return DeclaredStatements.createYangVersion(ctx.getArgument(), substatements);
  60     }
  61
  62     @Override
  63     protected YangVersionStatement createEmptyDeclared(final StmtContext<YangVersion, YangVersionStatement, ?> ctx) {
  64         return DeclaredStatements.createYangVersion(ctx.getArgument());
  65     }
  66
  67     @Override
  68     protected YangVersionEffectiveStatement createEffective(final Current<YangVersion, YangVersionStatement> stmt,
  69             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
  70         return EffectiveStatements.createYangVersion(stmt.declared(), substatements);
  71     }
  72 }