Restore GeneratedTypeReference

Closes gh-28926

spring-core/src/main/java/org/springframework/aot/generate/GeneratedTypeReference.java

@@ -0,0 +1,60 @@
+/*
+ * Copyright 2002-2022 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.aot.generate;
+
+import org.springframework.aot.hint.AbstractTypeReference;
+import org.springframework.aot.hint.TypeReference;
+import org.springframework.javapoet.ClassName;
+import org.springframework.lang.Nullable;
+import org.springframework.util.Assert;
+
+/**
+ * A {@link TypeReference} for a generated {@linkplain ClassName type}.
+ *
+ * @author Stephane Nicoll
+ * @since 6.0
+ */
+public final class GeneratedTypeReference extends AbstractTypeReference {
+
+	private final ClassName className;
+
+	private GeneratedTypeReference(ClassName className) {
+		super(className.packageName(), className.simpleName(), safeCreate(className.enclosingClassName()));
+		this.className = className;
+	}
+
+	@Nullable
+	private static GeneratedTypeReference safeCreate(@Nullable ClassName className) {
+		return (className != null ? new GeneratedTypeReference(className) : null);
+	}
+
+	public static GeneratedTypeReference of(ClassName className) {
+		Assert.notNull(className, "ClassName must not be null");
+		return new GeneratedTypeReference(className);
+	}
+
+	@Override
+	public String getCanonicalName() {
+		return this.className.canonicalName();
+	}
+
+	@Override
+	protected boolean isPrimitive() {
+		return this.className.isPrimitive();
+	}
+
+}