yang/yang-parser-rfc7950/src/main/java/org/opendaylight/yangtools/yang/parser/rfc7950/stmt/extension/ExtensionStatementSupport.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.extension;
   9
  10 import static com.google.common.base.Verify.verify;
  11 import static com.google.common.base.Verify.verifyNotNull;
  12
  13 import com.google.common.collect.ImmutableList;
  14 import java.util.IdentityHashMap;
  15 import java.util.Map;
  16 import org.eclipse.jdt.annotation.NonNull;
  17 import org.opendaylight.yangtools.openconfig.model.api.OpenConfigStatements;
  18 import org.opendaylight.yangtools.yang.common.QName;
  19 import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
  20 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
  21 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
  22 import org.opendaylight.yangtools.yang.model.api.stmt.ArgumentStatement;
  23 import org.opendaylight.yangtools.yang.model.api.stmt.ExtensionEffectiveStatement;
  24 import org.opendaylight.yangtools.yang.model.api.stmt.ExtensionStatement;
  25 import org.opendaylight.yangtools.yang.model.api.stmt.YinElementStatement;
  26 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.BaseQNameStatementSupport;
  27 import org.opendaylight.yangtools.yang.parser.spi.ExtensionNamespace;
  28 import org.opendaylight.yangtools.yang.parser.spi.meta.StatementDefinitionNamespace;
  29 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
  30 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext.Mutable;
  31 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils;
  32 import org.opendaylight.yangtools.yang.parser.spi.meta.SubstatementValidator;
  33
  34 public final class ExtensionStatementSupport
  35         extends BaseQNameStatementSupport<ExtensionStatement, ExtensionEffectiveStatement> {
  36     private static final SubstatementValidator SUBSTATEMENT_VALIDATOR = SubstatementValidator.builder(YangStmtMapping
  37         .EXTENSION)
  38         .addOptional(YangStmtMapping.ARGUMENT)
  39         .addOptional(YangStmtMapping.DESCRIPTION)
  40         .addOptional(YangStmtMapping.REFERENCE)
  41         .addOptional(YangStmtMapping.STATUS)
  42         .build();
  43     private static final ExtensionStatementSupport INSTANCE = new ExtensionStatementSupport();
  44     private static final ThreadLocal<Map<StmtContext<?, ?, ?>, ExtensionEffectiveStatementImpl>> TL_BUILDERS =
  45             new ThreadLocal<>();
  46
  47     private ExtensionStatementSupport() {
  48         super(YangStmtMapping.EXTENSION);
  49     }
  50
  51     public static ExtensionStatementSupport getInstance() {
  52         return INSTANCE;
  53     }
  54
  55     @Override
  56     public QName parseArgumentValue(final StmtContext<?,?,?> ctx, final String value) {
  57         return StmtContextUtils.parseIdentifier(ctx, value);
  58     }
  59
  60     @Override
  61     public void onStatementDefinitionDeclared(
  62             final Mutable<QName, ExtensionStatement, ExtensionEffectiveStatement> stmt) {
  63         super.onStatementDefinitionDeclared(stmt);
  64
  65         QName stmtName = stmt.coerceStatementArgument();
  66         if (OpenConfigStatements.OPENCONFIG_VERSION.getStatementName().isEqualWithoutRevision(stmtName)) {
  67             stmtName = stmtName.withoutRevision();
  68         }
  69
  70         stmt.addContext(ExtensionNamespace.class, stmtName, stmt);
  71
  72         final StmtContext<QName, ?, ?> argument = StmtContextUtils.findFirstDeclaredSubstatement(stmt,
  73             ArgumentStatement.class);
  74         final StmtContext<Boolean, ?, ?> yinElement = StmtContextUtils.findFirstDeclaredSubstatement(stmt,
  75             YinElementStatement.class);
  76
  77         stmt.addToNs(StatementDefinitionNamespace.class, stmt.getStatementArgument(),
  78             new ModelDefinedStatementSupport(new ModelDefinedStatementDefinition(stmt.coerceStatementArgument(),
  79                 argument != null ? argument.getStatementArgument() : null,
  80                         yinElement != null && yinElement.coerceStatementArgument())));
  81     }
  82
  83     @Override
  84     protected SubstatementValidator getSubstatementValidator() {
  85         return SUBSTATEMENT_VALIDATOR;
  86     }
  87
  88     @Override
  89     protected ExtensionStatement createDeclared(final StmtContext<QName, ExtensionStatement, ?> ctx,
  90             final ImmutableList<? extends DeclaredStatement<?>> substatements) {
  91         return new RegularExtensionStatement(ctx.coerceStatementArgument(), substatements);
  92     }
  93
  94     @Override
  95     protected ExtensionStatement createEmptyDeclared(final StmtContext<QName, ExtensionStatement, ?> ctx) {
  96         return new EmptyExtensionStatement(ctx.coerceStatementArgument());
  97     }
  98
  99     @Override
 100     public ExtensionEffectiveStatement createEffective(
 101             final StmtContext<QName, ExtensionStatement, ExtensionEffectiveStatement> ctx) {
 102         Map<StmtContext<?, ?, ?>, ExtensionEffectiveStatementImpl> tl = TL_BUILDERS.get();
 103         if (tl == null) {
 104             tl = new IdentityHashMap<>();
 105             TL_BUILDERS.set(tl);
 106         }
 107
 108         final ExtensionEffectiveStatementImpl existing = tl.get(ctx);
 109         if (existing != null) {
 110             // Implies non-empty map, no cleanup necessary
 111             return existing;
 112         }
 113
 114         try {
 115             final ExtensionEffectiveStatementImpl created = new ExtensionEffectiveStatementImpl(ctx.buildDeclared(),
 116                 ctx.getSchemaPath().get());
 117             verify(tl.put(ctx, created) == null);
 118             try {
 119                 return super.createEffective(ctx);
 120             } finally {
 121                 verify(tl.remove(ctx) == created);
 122
 123             }
 124         } finally {
 125             if (tl.isEmpty()) {
 126                 TL_BUILDERS.remove();
 127             }
 128         }
 129     }
 130
 131     @Override
 132     protected ExtensionEffectiveStatement createEffective(
 133             final StmtContext<QName, ExtensionStatement, ExtensionEffectiveStatement> ctx,
 134             final ExtensionStatement declared,
 135             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
 136         return finishCreate(ctx, substatements);
 137     }
 138
 139     @Override
 140     protected ExtensionEffectiveStatement createEmptyEffective(
 141             final StmtContext<QName, ExtensionStatement, ExtensionEffectiveStatement> ctx,
 142             final ExtensionStatement declared) {
 143         return finishCreate(ctx, ImmutableList.of());
 144     }
 145
 146     private static @NonNull ExtensionEffectiveStatement finishCreate(final StmtContext<?, ?, ?> ctx,
 147             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
 148         final ExtensionEffectiveStatementImpl ret = verifyNotNull(verifyNotNull(TL_BUILDERS.get(),
 149             "Statement build state not initialized").get(ctx), "No build state found for %s", ctx);
 150         ret.setSubstatements(substatements);
 151         return ret;
 152     }
 153 }