yang/yang-parser-impl/src/main/java/org/opendaylight/yangtools/yang/parser/stmt/rfc6020/ExtensionStatementImpl.java

   1 /*
   2  * Copyright (c) 2015 Cisco Systems, Inc. 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.stmt.rfc6020;
   9
  10 import java.util.HashSet;
  11 import java.util.Set;
  12 import org.opendaylight.yangtools.yang.common.QName;
  13 import org.opendaylight.yangtools.yang.model.api.Rfc6020Mapping;
  14 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
  15 import org.opendaylight.yangtools.yang.model.api.stmt.ArgumentStatement;
  16 import org.opendaylight.yangtools.yang.model.api.stmt.DescriptionStatement;
  17 import org.opendaylight.yangtools.yang.model.api.stmt.ExtensionStatement;
  18 import org.opendaylight.yangtools.yang.model.api.stmt.ReferenceStatement;
  19 import org.opendaylight.yangtools.yang.model.api.stmt.StatusStatement;
  20 import org.opendaylight.yangtools.yang.parser.spi.ExtensionNamespace;
  21 import org.opendaylight.yangtools.yang.parser.spi.SubstatementValidator;
  22 import org.opendaylight.yangtools.yang.parser.spi.meta.AbstractDeclaredStatement;
  23 import org.opendaylight.yangtools.yang.parser.spi.meta.AbstractStatementSupport;
  24 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
  25 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
  26 import org.opendaylight.yangtools.yang.parser.stmt.rfc6020.effective.ExtensionEffectiveStatementImpl;
  27
  28 public class ExtensionStatementImpl extends AbstractDeclaredStatement<QName> implements ExtensionStatement {
  29     private static final SubstatementValidator SUBSTATEMENT_VALIDATOR = SubstatementValidator.builder(Rfc6020Mapping
  30             .EXTENSION)
  31             .add(Rfc6020Mapping.ARGUMENT, 0, 1)
  32             .add(Rfc6020Mapping.DESCRIPTION, 0, 1)
  33             .add(Rfc6020Mapping.REFERENCE, 0, 1)
  34             .add(Rfc6020Mapping.STATUS, 0, 1)
  35             .build();
  36
  37     protected ExtensionStatementImpl(final StmtContext<QName, ExtensionStatement,?> context) {
  38         super(context);
  39     }
  40
  41     public static class Definition extends AbstractStatementSupport<QName,ExtensionStatement,EffectiveStatement<QName,ExtensionStatement>> {
  42         private static final ThreadLocal<Set<StmtContext<?, ?, ?>>> BUILDING = new ThreadLocal<>();
  43
  44         public Definition() {
  45             super(Rfc6020Mapping.EXTENSION);
  46         }
  47
  48         @Override
  49         public QName parseArgumentValue(final StmtContext<?,?,?> ctx, final String value) {
  50             return Utils.qNameFromArgument(ctx, value);
  51         }
  52
  53         @Override
  54         public ExtensionStatement createDeclared(final StmtContext<QName, ExtensionStatement,?> ctx) {
  55             return new ExtensionStatementImpl(ctx);
  56         }
  57
  58         @Override
  59         public EffectiveStatement<QName,ExtensionStatement> createEffective(
  60                 final StmtContext<QName,ExtensionStatement, EffectiveStatement<QName,ExtensionStatement>> ctx) {
  61             Set<StmtContext<?, ?, ?>> building = BUILDING.get();
  62             if (building == null) {
  63                 building = new HashSet<>();
  64                 BUILDING.set(building);
  65             }
  66
  67             SourceException.throwIf(building.contains(ctx), ctx.getStatementSourceReference(),
  68                 "Extension %s references itself", ctx.getStatementArgument());
  69
  70             building.add(ctx);
  71             try {
  72                 return new ExtensionEffectiveStatementImpl(ctx);
  73             } finally {
  74                 building.remove(ctx);
  75                 if (building.isEmpty()) {
  76                     BUILDING.remove();
  77                 }
  78             }
  79         }
  80
  81         @Override
  82         public void onStatementDefinitionDeclared(final StmtContext.Mutable<QName, ExtensionStatement, EffectiveStatement<QName, ExtensionStatement>> stmt) {
  83             stmt.addContext(ExtensionNamespace.class, stmt.getStatementArgument(), stmt);
  84         }
  85
  86         @Override
  87         public void onFullDefinitionDeclared(final StmtContext.Mutable<QName, ExtensionStatement,
  88                 EffectiveStatement<QName, ExtensionStatement>> stmt) {
  89             super.onFullDefinitionDeclared(stmt);
  90             SUBSTATEMENT_VALIDATOR.validate(stmt);
  91         }
  92     }
  93
  94     @Override
  95     public StatusStatement getStatus() {
  96         return firstDeclared(StatusStatement.class);
  97     }
  98
  99     @Override
 100     public DescriptionStatement getDescription() {
 101         return firstDeclared(DescriptionStatement.class);
 102     }
 103
 104     @Override
 105     public ReferenceStatement getReference() {
 106         return firstDeclared(ReferenceStatement.class);
 107     }
 108
 109     @Override
 110     public ArgumentStatement getArgument() {
 111         return firstDeclared(ArgumentStatement.class);
 112     }
 113
 114 }