yang/yang-parser-rfc7950/src/main/java/org/opendaylight/yangtools/yang/parser/rfc7950/stmt/type/AbstractTypeStatementSupport.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 static com.google.common.base.Preconditions.checkArgument;
  11
  12 import com.google.common.collect.ImmutableList;
  13 import com.google.common.collect.ImmutableMap;
  14 import java.util.Collection;
  15 import java.util.Optional;
  16 import org.eclipse.jdt.annotation.NonNull;
  17 import org.opendaylight.yangtools.yang.common.QName;
  18 import org.opendaylight.yangtools.yang.common.Uint32;
  19 import org.opendaylight.yangtools.yang.common.YangVersion;
  20 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
  21 import org.opendaylight.yangtools.yang.model.api.TypeDefinition;
  22 import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
  23 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
  24 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
  25 import org.opendaylight.yangtools.yang.model.api.stmt.BitEffectiveStatement;
  26 import org.opendaylight.yangtools.yang.model.api.stmt.LengthEffectiveStatement;
  27 import org.opendaylight.yangtools.yang.model.api.stmt.TypeEffectiveStatement;
  28 import org.opendaylight.yangtools.yang.model.api.stmt.TypeStatement;
  29 import org.opendaylight.yangtools.yang.model.api.stmt.TypedefEffectiveStatement;
  30 import org.opendaylight.yangtools.yang.model.api.stmt.TypedefStatement;
  31 import org.opendaylight.yangtools.yang.model.api.type.BinaryTypeDefinition;
  32 import org.opendaylight.yangtools.yang.model.api.type.BitsTypeDefinition;
  33 import org.opendaylight.yangtools.yang.model.api.type.BitsTypeDefinition.Bit;
  34 import org.opendaylight.yangtools.yang.model.api.type.BooleanTypeDefinition;
  35 import org.opendaylight.yangtools.yang.model.api.type.DecimalTypeDefinition;
  36 import org.opendaylight.yangtools.yang.model.api.type.EmptyTypeDefinition;
  37 import org.opendaylight.yangtools.yang.model.api.type.EnumTypeDefinition;
  38 import org.opendaylight.yangtools.yang.model.api.type.IdentityrefTypeDefinition;
  39 import org.opendaylight.yangtools.yang.model.api.type.InstanceIdentifierTypeDefinition;
  40 import org.opendaylight.yangtools.yang.model.api.type.Int16TypeDefinition;
  41 import org.opendaylight.yangtools.yang.model.api.type.Int32TypeDefinition;
  42 import org.opendaylight.yangtools.yang.model.api.type.Int64TypeDefinition;
  43 import org.opendaylight.yangtools.yang.model.api.type.Int8TypeDefinition;
  44 import org.opendaylight.yangtools.yang.model.api.type.LeafrefTypeDefinition;
  45 import org.opendaylight.yangtools.yang.model.api.type.StringTypeDefinition;
  46 import org.opendaylight.yangtools.yang.model.api.type.Uint16TypeDefinition;
  47 import org.opendaylight.yangtools.yang.model.api.type.Uint32TypeDefinition;
  48 import org.opendaylight.yangtools.yang.model.api.type.Uint64TypeDefinition;
  49 import org.opendaylight.yangtools.yang.model.api.type.Uint8TypeDefinition;
  50 import org.opendaylight.yangtools.yang.model.api.type.UnionTypeDefinition;
  51 import org.opendaylight.yangtools.yang.model.util.type.BitsTypeBuilder;
  52 import org.opendaylight.yangtools.yang.model.util.type.InvalidLengthConstraintException;
  53 import org.opendaylight.yangtools.yang.model.util.type.LengthRestrictedTypeBuilder;
  54 import org.opendaylight.yangtools.yang.model.util.type.RestrictedTypes;
  55 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.BaseStatementSupport;
  56 import org.opendaylight.yangtools.yang.parser.spi.TypeNamespace;
  57 import org.opendaylight.yangtools.yang.parser.spi.meta.InferenceException;
  58 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder;
  59 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.InferenceAction;
  60 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.InferenceContext;
  61 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.Prerequisite;
  62 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelProcessingPhase;
  63 import org.opendaylight.yangtools.yang.parser.spi.meta.StatementSupport;
  64 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
  65 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext.Mutable;
  66 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils;
  67 import org.opendaylight.yangtools.yang.parser.spi.meta.SubstatementValidator;
  68 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
  69
  70 abstract class AbstractTypeStatementSupport
  71         extends BaseStatementSupport<String, TypeStatement, EffectiveStatement<String, TypeStatement>> {
  72     private static final SubstatementValidator SUBSTATEMENT_VALIDATOR = SubstatementValidator.builder(
  73         YangStmtMapping.TYPE)
  74         .addOptional(YangStmtMapping.BASE)
  75         .addAny(YangStmtMapping.BIT)
  76         .addAny(YangStmtMapping.ENUM)
  77         .addOptional(YangStmtMapping.FRACTION_DIGITS)
  78         .addOptional(YangStmtMapping.LENGTH)
  79         .addOptional(YangStmtMapping.PATH)
  80         .addAny(YangStmtMapping.PATTERN)
  81         .addOptional(YangStmtMapping.RANGE)
  82         .addOptional(YangStmtMapping.REQUIRE_INSTANCE)
  83         .addAny(YangStmtMapping.TYPE)
  84         .build();
  85
  86     static final String BINARY = "binary";
  87     static final String BITS = "bits";
  88     static final String BOOLEAN = "boolean";
  89     static final String DECIMAL64 = "decimal64";
  90     static final String EMPTY = "empty";
  91     static final String ENUMERATION = "enumeration";
  92     static final String IDENTITY_REF = "identityref";
  93     static final String INSTANCE_IDENTIFIER = "instance-identifier";
  94     static final String INT8 = "int8";
  95     static final String INT16 = "int16";
  96     static final String INT32 = "int32";
  97     static final String INT64 = "int64";
  98     static final String LEAF_REF = "leafref";
  99     static final String STRING = "string";
 100     static final String UINT8 = "uint8";
 101     static final String UINT16 = "uint16";
 102     static final String UINT32 = "uint32";
 103     static final String UINT64 = "uint64";
 104     static final String UNION = "union";
 105
 106     private static final ImmutableMap<String, String> BUILT_IN_TYPES = ImmutableMap.<String, String>builder()
 107         .put(BINARY, BINARY)
 108         .put(BITS, BITS)
 109         .put(BOOLEAN, BOOLEAN)
 110         .put(DECIMAL64, DECIMAL64)
 111         .put(EMPTY, EMPTY)
 112         .put(ENUMERATION, ENUMERATION)
 113         .put(IDENTITY_REF,IDENTITY_REF)
 114         .put(INSTANCE_IDENTIFIER, INSTANCE_IDENTIFIER)
 115         .put(INT8, INT8)
 116         .put(INT16, INT16)
 117         .put(INT32, INT32)
 118         .put(INT64, INT64)
 119         .put(LEAF_REF, LEAF_REF)
 120         .put(STRING, STRING)
 121         .put(UINT8, UINT8)
 122         .put(UINT16, UINT16)
 123         .put(UINT32, UINT32)
 124         .put(UINT64, UINT64)
 125         .put(UNION, UNION)
 126         .build();
 127
 128     private static final ImmutableMap<String, StatementSupport<?, ?, ?>> ARGUMENT_SPECIFIC_SUPPORTS =
 129             ImmutableMap.<String, StatementSupport<?, ?, ?>>builder()
 130             .put(BITS, new BitsSpecificationSupport())
 131             .put(DECIMAL64, new Decimal64SpecificationSupport())
 132             .put(ENUMERATION, new EnumSpecificationSupport())
 133             .put(IDENTITY_REF, new IdentityRefSpecificationRFC6020Support())
 134             .put(INSTANCE_IDENTIFIER, new InstanceIdentifierSpecificationSupport())
 135             .put(LEAF_REF, new LeafrefSpecificationRFC6020Support())
 136             .put(UNION, new UnionSpecificationSupport())
 137             .build();
 138
 139     AbstractTypeStatementSupport() {
 140         super(YangStmtMapping.TYPE);
 141     }
 142
 143     @Override
 144     public final String parseArgumentValue(final StmtContext<?, ?, ?> ctx, final String value) {
 145         return value;
 146     }
 147
 148     @Override
 149     public final void onFullDefinitionDeclared(
 150             final Mutable<String, TypeStatement, EffectiveStatement<String, TypeStatement>> stmt) {
 151         super.onFullDefinitionDeclared(stmt);
 152
 153         // if it is yang built-in type, no prerequisite is needed, so simply return
 154         if (BUILT_IN_TYPES.containsKey(stmt.getStatementArgument())) {
 155             return;
 156         }
 157
 158         final QName typeQName = StmtContextUtils.parseNodeIdentifier(stmt, stmt.getStatementArgument());
 159         final ModelActionBuilder typeAction = stmt.newInferenceAction(ModelProcessingPhase.EFFECTIVE_MODEL);
 160         final Prerequisite<StmtContext<?, ?, ?>> typePrereq = typeAction.requiresCtx(stmt, TypeNamespace.class,
 161                 typeQName, ModelProcessingPhase.EFFECTIVE_MODEL);
 162         typeAction.mutatesEffectiveCtx(stmt.getParentContext());
 163
 164         /*
 165          * If the type does not exist, throw new InferenceException.
 166          * Otherwise perform no operation.
 167          */
 168         typeAction.apply(new InferenceAction() {
 169             @Override
 170             public void apply(final InferenceContext ctx) {
 171                 // Intentional NOOP
 172             }
 173
 174             @Override
 175             public void prerequisiteFailed(final Collection<? extends Prerequisite<?>> failed) {
 176                 InferenceException.throwIf(failed.contains(typePrereq), stmt.getStatementSourceReference(),
 177                     "Type [%s] was not found.", typeQName);
 178             }
 179         });
 180     }
 181
 182     @Override
 183     public final String internArgument(final String rawArgument) {
 184         final String found;
 185         return (found = BUILT_IN_TYPES.get(rawArgument)) != null ? found : rawArgument;
 186     }
 187
 188     @Override
 189     public boolean hasArgumentSpecificSupports() {
 190         return !ARGUMENT_SPECIFIC_SUPPORTS.isEmpty();
 191     }
 192
 193     @Override
 194     public StatementSupport<?, ?, ?> getSupportSpecificForArgument(final String argument) {
 195         return ARGUMENT_SPECIFIC_SUPPORTS.get(argument);
 196     }
 197
 198     @Override
 199     protected final SubstatementValidator getSubstatementValidator() {
 200         return SUBSTATEMENT_VALIDATOR;
 201     }
 202
 203     @Override
 204     protected final TypeStatement createDeclared(final StmtContext<String, TypeStatement, ?> ctx,
 205             final ImmutableList<? extends DeclaredStatement<?>> substatements) {
 206         return new RegularTypeStatement(ctx, substatements);
 207     }
 208
 209     @Override
 210     protected final TypeStatement createEmptyDeclared(final StmtContext<String, TypeStatement, ?> ctx) {
 211         final TypeStatement builtin;
 212         return (builtin = BuiltinTypeStatement.lookup(ctx)) != null ? builtin : new EmptyTypeStatement(ctx);
 213     }
 214
 215     @Override
 216     protected final TypeEffectiveStatement<TypeStatement> createEffective(
 217             final StmtContext<String, TypeStatement, EffectiveStatement<String, TypeStatement>> ctx,
 218             final TypeStatement declared, final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
 219         // First look up the proper base type
 220         final TypeEffectiveStatement<TypeStatement> typeStmt = resolveType(ctx);
 221         // Now instantiate the proper effective statement for that type
 222         final TypeDefinition<?> baseType = typeStmt.getTypeDefinition();
 223         if (baseType instanceof BinaryTypeDefinition) {
 224             return createBinary(ctx, (BinaryTypeDefinition) baseType, declared, substatements);
 225         } else if (baseType instanceof BitsTypeDefinition) {
 226             return createBits(ctx, (BitsTypeDefinition) baseType, declared, substatements);
 227         } else if (baseType instanceof BooleanTypeDefinition) {
 228             return createBoolean(ctx, (BooleanTypeDefinition) baseType, declared, substatements);
 229         } else if (baseType instanceof DecimalTypeDefinition) {
 230             return new DecimalTypeEffectiveStatementImpl(ctx, (DecimalTypeDefinition) baseType);
 231         } else if (baseType instanceof EmptyTypeDefinition) {
 232             return createEmpty(ctx, (EmptyTypeDefinition) baseType, declared, substatements);
 233         } else if (baseType instanceof EnumTypeDefinition) {
 234             return new EnumTypeEffectiveStatementImpl(ctx, (EnumTypeDefinition) baseType);
 235         } else if (baseType instanceof IdentityrefTypeDefinition) {
 236             return createIdentityref(ctx, (IdentityrefTypeDefinition) baseType, declared, substatements);
 237         } else if (baseType instanceof InstanceIdentifierTypeDefinition) {
 238             return new InstanceIdentifierTypeEffectiveStatementImpl(ctx,
 239                 (InstanceIdentifierTypeDefinition) baseType);
 240         } else if (baseType instanceof Int8TypeDefinition) {
 241             return new IntegralTypeEffectiveStatementImpl<>(ctx,
 242                     RestrictedTypes.newInt8Builder((Int8TypeDefinition) baseType, typeEffectiveSchemaPath(ctx)));
 243         } else if (baseType instanceof Int16TypeDefinition) {
 244             return new IntegralTypeEffectiveStatementImpl<>(ctx,
 245                     RestrictedTypes.newInt16Builder((Int16TypeDefinition) baseType, typeEffectiveSchemaPath(ctx)));
 246         } else if (baseType instanceof Int32TypeDefinition) {
 247             return new IntegralTypeEffectiveStatementImpl<>(ctx,
 248                     RestrictedTypes.newInt32Builder((Int32TypeDefinition) baseType, typeEffectiveSchemaPath(ctx)));
 249         } else if (baseType instanceof Int64TypeDefinition) {
 250             return new IntegralTypeEffectiveStatementImpl<>(ctx,
 251                     RestrictedTypes.newInt64Builder((Int64TypeDefinition) baseType, typeEffectiveSchemaPath(ctx)));
 252         } else if (baseType instanceof LeafrefTypeDefinition) {
 253             return new LeafrefTypeEffectiveStatementImpl(ctx, (LeafrefTypeDefinition) baseType);
 254         } else if (baseType instanceof StringTypeDefinition) {
 255             return new StringTypeEffectiveStatementImpl(ctx, (StringTypeDefinition) baseType);
 256         } else if (baseType instanceof Uint8TypeDefinition) {
 257             return new IntegralTypeEffectiveStatementImpl<>(ctx,
 258                     RestrictedTypes.newUint8Builder((Uint8TypeDefinition) baseType, typeEffectiveSchemaPath(ctx)));
 259         } else if (baseType instanceof Uint16TypeDefinition) {
 260             return new IntegralTypeEffectiveStatementImpl<>(ctx,
 261                     RestrictedTypes.newUint16Builder((Uint16TypeDefinition) baseType, typeEffectiveSchemaPath(ctx)));
 262         } else if (baseType instanceof Uint32TypeDefinition) {
 263             return new IntegralTypeEffectiveStatementImpl<>(ctx,
 264                     RestrictedTypes.newUint32Builder((Uint32TypeDefinition) baseType, typeEffectiveSchemaPath(ctx)));
 265         } else if (baseType instanceof Uint64TypeDefinition) {
 266             return new IntegralTypeEffectiveStatementImpl<>(ctx,
 267                     RestrictedTypes.newUint64Builder((Uint64TypeDefinition) baseType, typeEffectiveSchemaPath(ctx)));
 268         } else if (baseType instanceof UnionTypeDefinition) {
 269             return createUnion(ctx, (UnionTypeDefinition) baseType, declared, substatements);
 270         } else {
 271             throw new IllegalStateException("Unhandled base type " + baseType);
 272         }
 273     }
 274
 275     @Override
 276     protected final EffectiveStatement<String, TypeStatement> createEmptyEffective(
 277             final StmtContext<String, TypeStatement, EffectiveStatement<String, TypeStatement>> ctx,
 278             final TypeStatement declared) {
 279         return resolveType(ctx);
 280     }
 281
 282     static final SchemaPath typeEffectiveSchemaPath(final StmtContext<?, ?, ?> stmtCtx) {
 283         final SchemaPath path = stmtCtx.getSchemaPath().get();
 284         final SchemaPath parent = path.getParent();
 285         final QName parentQName = parent.getLastComponent();
 286         checkArgument(parentQName != null, "Path %s has an empty parent", path);
 287
 288         final QName qname = path.getLastComponent().bindTo(parentQName.getModule()).intern();
 289         return parent.createChild(qname);
 290     }
 291
 292     /**
 293      * Resolve type reference, as pointed to by the context's argument.
 294      *
 295      * @param ctx Statement context
 296      * @return Resolved type
 297      * @throws SourceException if the target type cannot be found
 298      */
 299     private static @NonNull TypeEffectiveStatement<TypeStatement> resolveType(final StmtContext<String, ?, ?> ctx) {
 300         final String argument = ctx.coerceStatementArgument();
 301         switch (argument) {
 302             case BINARY:
 303                 return BuiltinEffectiveStatement.BINARY;
 304             case BOOLEAN:
 305                 return BuiltinEffectiveStatement.BOOLEAN;
 306             case EMPTY:
 307                 return BuiltinEffectiveStatement.EMPTY;
 308             case INSTANCE_IDENTIFIER:
 309                 return BuiltinEffectiveStatement.INSTANCE_IDENTIFIER;
 310             case INT8:
 311                 return BuiltinEffectiveStatement.INT8;
 312             case INT16:
 313                 return BuiltinEffectiveStatement.INT16;
 314             case INT32:
 315                 return BuiltinEffectiveStatement.INT32;
 316             case INT64:
 317                 return BuiltinEffectiveStatement.INT64;
 318             case STRING:
 319                 return BuiltinEffectiveStatement.STRING;
 320             case UINT8:
 321                 return BuiltinEffectiveStatement.UINT8;
 322             case UINT16:
 323                 return BuiltinEffectiveStatement.UINT16;
 324             case UINT32:
 325                 return BuiltinEffectiveStatement.UINT32;
 326             case UINT64:
 327                 return BuiltinEffectiveStatement.UINT64;
 328             default:
 329                 final QName qname = StmtContextUtils.parseNodeIdentifier(ctx, argument);
 330                 final StmtContext<?, TypedefStatement, TypedefEffectiveStatement> typedef =
 331                         SourceException.throwIfNull(ctx.getFromNamespace(TypeNamespace.class, qname),
 332                             ctx.getStatementSourceReference(), "Type '%s' not found", qname);
 333                 return typedef.buildEffective().asTypeEffectiveStatement();
 334         }
 335     }
 336
 337     private static @NonNull TypeEffectiveStatement<TypeStatement> createBinary(final StmtContext<?, ?, ?> ctx,
 338             final BinaryTypeDefinition baseType, final TypeStatement declared,
 339             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
 340         final LengthRestrictedTypeBuilder<BinaryTypeDefinition> builder =
 341                 RestrictedTypes.newBinaryBuilder(baseType, typeEffectiveSchemaPath(ctx));
 342
 343         for (EffectiveStatement<?, ?> stmt : substatements) {
 344             if (stmt instanceof LengthEffectiveStatement) {
 345                 final LengthEffectiveStatement length = (LengthEffectiveStatement)stmt;
 346
 347                 try {
 348                     builder.setLengthConstraint(length, length.argument());
 349                 } catch (IllegalStateException e) {
 350                     throw new SourceException(ctx.getStatementSourceReference(), e,
 351                         "Multiple length constraints encountered");
 352                 } catch (InvalidLengthConstraintException e) {
 353                     throw new SourceException(ctx.getStatementSourceReference(), e, "Invalid length constraint %s",
 354                         length.argument());
 355                 }
 356             }
 357         }
 358
 359         return new TypeEffectiveStatementImpl<>(declared, substatements, builder);
 360     }
 361
 362     private static @NonNull TypeEffectiveStatement<TypeStatement> createBits(final StmtContext<?, ?, ?> ctx,
 363             final BitsTypeDefinition baseType, final TypeStatement declared,
 364             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
 365         final BitsTypeBuilder builder = RestrictedTypes.newBitsBuilder(baseType, ctx.getSchemaPath().get());
 366
 367         final YangVersion yangVersion = ctx.getRootVersion();
 368         for (final EffectiveStatement<?, ?> stmt : substatements) {
 369             if (stmt instanceof BitEffectiveStatement) {
 370                 SourceException.throwIf(yangVersion != YangVersion.VERSION_1_1, ctx.getStatementSourceReference(),
 371                         "Restricted bits type is allowed only in YANG 1.1 version.");
 372                 final BitEffectiveStatement bitSubStmt = (BitEffectiveStatement) stmt;
 373
 374                 // FIXME: this looks like a duplicate of BitsSpecificationEffectiveStatement
 375                 final Optional<Uint32> declaredPosition = bitSubStmt.getDeclaredPosition();
 376                 final Uint32 effectivePos;
 377                 if (declaredPosition.isEmpty()) {
 378                     effectivePos = getBaseTypeBitPosition(bitSubStmt.argument(), baseType, ctx);
 379                 } else {
 380                     effectivePos = declaredPosition.get();
 381                 }
 382
 383                 builder.addBit(EffectiveTypeUtil.buildBit(bitSubStmt, effectivePos));
 384             }
 385         }
 386
 387         return new TypeEffectiveStatementImpl<>(declared, substatements, builder);
 388     }
 389
 390     private static @NonNull TypeEffectiveStatement<TypeStatement> createBoolean(final StmtContext<?, ?, ?> ctx,
 391             final BooleanTypeDefinition baseType, final TypeStatement declared,
 392             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
 393         return new TypeEffectiveStatementImpl<>(declared, substatements, RestrictedTypes.newBooleanBuilder(baseType,
 394             typeEffectiveSchemaPath(ctx)));
 395     }
 396
 397     private static @NonNull TypeEffectiveStatement<TypeStatement> createEmpty(final StmtContext<?, ?, ?> ctx,
 398             final EmptyTypeDefinition baseType, final TypeStatement declared,
 399             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
 400         return new TypeEffectiveStatementImpl<>(declared, substatements, RestrictedTypes.newEmptyBuilder(baseType,
 401             typeEffectiveSchemaPath(ctx)));
 402     }
 403
 404     private static @NonNull TypeEffectiveStatement<TypeStatement> createIdentityref(final StmtContext<?, ?, ?> ctx,
 405             final IdentityrefTypeDefinition baseType, final TypeStatement declared,
 406             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
 407         return new TypeEffectiveStatementImpl<>(declared, substatements, RestrictedTypes.newIdentityrefBuilder(baseType,
 408             typeEffectiveSchemaPath(ctx)));
 409     }
 410
 411     private static @NonNull TypeEffectiveStatement<TypeStatement> createUnion(final StmtContext<?, ?, ?> ctx,
 412             final UnionTypeDefinition baseType, final TypeStatement declared,
 413             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
 414         return new TypeEffectiveStatementImpl<>(declared, substatements, RestrictedTypes.newUnionBuilder(baseType,
 415             typeEffectiveSchemaPath(ctx)));
 416     }
 417
 418     private static Uint32 getBaseTypeBitPosition(final String bitName, final BitsTypeDefinition baseType,
 419             final StmtContext<?, ?, ?> ctx) {
 420         for (Bit baseTypeBit : baseType.getBits()) {
 421             if (bitName.equals(baseTypeBit.getName())) {
 422                 return baseTypeBit.getPosition();
 423             }
 424         }
 425
 426         throw new SourceException(ctx.getStatementSourceReference(),
 427                 "Bit '%s' is not a subset of its base bits type %s.", bitName, baseType.getQName());
 428     }
 429 }