Move Utils.findNode()

[yangtools.git] / yang / yang-parser-impl / src / main / java / org / opendaylight / yangtools / yang / parser / rfc7950 / namespace / SchemaNodeIdentifierBuildNamespace.java

diff --git a/yang/yang-parser-impl/src/main/java/org/opendaylight/yangtools/yang/parser/rfc7950/namespace/SchemaNodeIdentifierBuildNamespace.java b/yang/yang-parser-impl/src/main/java/org/opendaylight/yangtools/yang/parser/rfc7950/namespace/SchemaNodeIdentifierBuildNamespace.java
index 37dc85c6c0a119d7b1325e01504a7d884cef815b..c26b9f7403c7a64c0b7b6d835debede513b8c566 100644 (file)
--- a/yang/yang-parser-impl/src/main/java/org/opendaylight/yangtools/yang/parser/rfc7950/namespace/SchemaNodeIdentifierBuildNamespace.java
+++ b/yang/yang-parser-impl/src/main/java/org/opendaylight/yangtools/yang/parser/rfc7950/namespace/SchemaNodeIdentifierBuildNamespace.java
@@ -7,9 +7,12 @@
  */
 package org.opendaylight.yangtools.yang.parser.rfc7950.namespace;
 
+import static java.util.Objects.requireNonNull;
+
 import com.google.common.annotations.Beta;
 import java.util.Collection;
 import java.util.Iterator;
+import java.util.Optional;
 import javax.annotation.Nonnull;
 import org.opendaylight.yangtools.yang.common.QName;
 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
@@ -33,6 +36,21 @@ public final class SchemaNodeIdentifierBuildNamespace
         super(SchemaNodeIdentifierBuildNamespace.class, (Class) ChildSchemaNodeNamespace.class);
     }
 
+    /**
+     * Find statement context identified by interpreting specified {@link SchemaNodeIdentifier} starting at specified
+     * {@link StmtContext}.
+     *
+     * @param root Search root context
+     * @param identifier {@link SchemaNodeIdentifier} relative to search root
+     * @return Matching statement context, if present.
+     * @throws NullPointerException if any of the arguments is null
+     */
+    public static Optional<StmtContext<?, ?, ?>> findNode(final StmtContext<?, ?, ?> root,
+            final SchemaNodeIdentifier identifier) {
+        return Optional.ofNullable(root.getFromNamespace(SchemaNodeIdentifierBuildNamespace.class,
+            requireNonNull(identifier)));
+    }
+
     @Override
     public Mutable<?, ?, EffectiveStatement<?, ?>> get(@Nonnull final SchemaNodeIdentifier key) {
         throw new UnsupportedOperationException("Direct access to namespace is not supported");