DeclaredStatements can contain default implementations

[yangtools.git] / yang / yang-model-api / src / main / java / org / opendaylight / yangtools / yang / model / api / stmt / TypeStatement.java

diff --git a/yang/yang-model-api/src/main/java/org/opendaylight/yangtools/yang/model/api/stmt/TypeStatement.java b/yang/yang-model-api/src/main/java/org/opendaylight/yangtools/yang/model/api/stmt/TypeStatement.java
index 9d44a6bd684d1365213f15e58fc472eadf2acdc4..d419d880dc8f9a4ecfd8a7eb7599fa159bc71a19 100644 (file)
--- a/yang/yang-model-api/src/main/java/org/opendaylight/yangtools/yang/model/api/stmt/TypeStatement.java
+++ b/yang/yang-model-api/src/main/java/org/opendaylight/yangtools/yang/model/api/stmt/TypeStatement.java
@@ -8,89 +8,122 @@
 package org.opendaylight.yangtools.yang.model.api.stmt;
 
 import java.util.Collection;
+import java.util.Optional;
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
 
 @Rfc6020AbnfRule("type-stmt")
 public interface TypeStatement extends DeclaredStatement<String> {
-
-    @Nonnull String getName();
+    default @Nonnull String getName() {
+        return argument();
+    }
 
     @Rfc6020AbnfRule("numerical-restrictions")
     interface NumericalRestrictions extends TypeStatement {
 
-        @Nonnull RangeStatement getRange();
+        default @Nonnull RangeStatement getRange() {
+            return findFirstDeclaredSubstatement(RangeStatement.class).get();
+        }
     }
 
     @Rfc6020AbnfRule("decimal64-specification")
     interface Decimal64Specification extends TypeStatement {
+        default @Nonnull FractionDigitsStatement getFractionDigits() {
+            return findFirstDeclaredSubstatement(FractionDigitsStatement.class).get();
+        }
 
-        @Nonnull FractionDigitsStatement getFractionDigits();
-
-        @Nullable RangeStatement getRange();
+        default @Nullable RangeStatement getRange() {
+            final Optional<RangeStatement> opt = findFirstDeclaredSubstatement(RangeStatement.class);
+            return opt.isPresent() ? opt.get() : null;
+        }
     }
 
     @Rfc6020AbnfRule("string-restrictions")
     interface StringRestrictions extends TypeStatement {
+        default @Nullable LengthStatement getLength() {
+            final Optional<LengthStatement> opt = findFirstDeclaredSubstatement(LengthStatement.class);
+            return opt.isPresent() ? opt.get() : null;
+        }
 
-        @Nullable LengthStatement getLength();
-
-        @Nonnull Collection<? extends PatternStatement> getPatterns();
+        default @Nonnull Collection<? extends PatternStatement> getPatterns() {
+            return declaredSubstatements(PatternStatement.class);
+        }
     }
 
     @Rfc6020AbnfRule("enum-specification")
     interface EnumSpecification extends TypeStatement {
 
-        @Nonnull Collection<? extends EnumStatement> getEnums();
+        default @Nonnull Collection<? extends EnumStatement> getEnums() {
+            return declaredSubstatements(EnumStatement.class);
+        }
     }
 
     @Rfc6020AbnfRule("leafref-specification")
     interface LeafrefSpecification extends TypeStatement {
-
-        @Nonnull PathStatement getPath();
+        default @Nonnull PathStatement getPath() {
+            return findFirstDeclaredSubstatement(PathStatement.class).get();
+        }
 
         /**
-         * All implementations should override this method.
-         * The default definition of this method is used only in YANG 1.0 (RFC6020) implementation of
-         * LeafrefSpecification which does not support require-instance statement.
-         * YANG leafref type has been changed in YANG 1.1 (RFC7950) and now allows require-instance statement.
+         * Return require-instance statement child, if present. For RFC6020 semantics, this method always returns
+         * null.
          *
-         * @return require-instance statement
+         * @return require-instance statement, if present.
          */
-         // FIXME: version 2.0.0: make this method non-default
-        @Nullable default RequireInstanceStatement getRequireInstance() {
-            return null;
+        default @Nullable RequireInstanceStatement getRequireInstance() {
+            final Optional<RequireInstanceStatement> opt =
+                    findFirstDeclaredSubstatement(RequireInstanceStatement.class);
+            return opt.isPresent() ? opt.get() : null;
         }
     }
 
     @Rfc6020AbnfRule("instanceidentifier-specification")
     interface InstanceIdentifierSpecification extends TypeStatement {
-
-        @Nullable RequireInstanceStatement getRequireInstance();
+        /**
+         * Return require-instance statement child, if present. For RFC6020 semantics, this method always returns
+         * null.
+         *
+         * @return require-instance statement, if present.
+         */
+        default @Nullable RequireInstanceStatement getRequireInstance() {
+            final Optional<RequireInstanceStatement> opt =
+                    findFirstDeclaredSubstatement(RequireInstanceStatement.class);
+            return opt.isPresent() ? opt.get() : null;
+        }
     }
 
     @Rfc6020AbnfRule("identityref-specification")
     interface IdentityRefSpecification extends TypeStatement {
-
-        @Nonnull BaseStatement getBase();
+        /**
+         * Returns the base statements.
+         *
+         * @return collection of base statements (in YANG 1.1 models) or a collection containing just one base
+         *         statement (in YANG 1.0 models)
+         */
+        default @Nonnull Collection<? extends BaseStatement> getBases() {
+            return declaredSubstatements(BaseStatement.class);
+        }
     }
 
     @Rfc6020AbnfRule("bits-specification")
     interface BitsSpecification extends TypeStatement {
-
-        @Nonnull Collection<? extends BitStatement> getBits();
+        default @Nonnull Collection<? extends BitStatement> getBits() {
+            return declaredSubstatements(BitStatement.class);
+        }
     }
 
     @Rfc6020AbnfRule("union-specification")
     interface UnionSpecification extends TypeStatement {
-
-        @Nonnull Collection<? extends TypeStatement> getTypes();
+        default @Nonnull Collection<? extends TypeStatement> getTypes() {
+            return declaredSubstatements(TypeStatement.class);
+        }
     }
 
     @Rfc6020AbnfRule("binary-specification")
     interface BinarySpecification extends TypeStatement {
-
-        @Nullable LengthStatement getLength();
+        default @Nonnull Collection<? extends LengthStatement> getLength() {
+            return declaredSubstatements(LengthStatement.class);
+        }
     }
 }