Provide abstract, default implementation of the Spring Session core CookieSerializer interface.

spring-session-data-geode/src/main/java/org/springframework/session/data/gemfire/web/http/AbstractCookieSerializer.java

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+/*
+ * Copyright 2020 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.session.data.gemfire.web.http;
+
+import static org.springframework.data.gemfire.util.RuntimeExceptionFactory.newUnsupportedOperationException;
+
+import java.util.Collections;
+import java.util.List;
+
+import javax.servlet.http.HttpServletRequest;
+
+import org.springframework.session.web.http.CookieSerializer;
+
+/**
+ * Abstract base class implementing the Spring Session core {@link CookieSerializer} interface to encapsulate
+ * functionality common to all implementations as well as to simplify the implementation of the Spring Session core
+ * {@link CookieSerializer} interface.
+ *
+ * @author John Blum
+ * @see javax.servlet.http.HttpServletRequest
+ * @see org.springframework.session.web.http.CookieSerializer
+ * @since 2.5.0
+ */
+public class AbstractCookieSerializer implements CookieSerializer {
+
+	protected static final String NOT_IMPLEMENTED = "NOT IMPLEMENTED";
+
+	/**
+	 * @inheritDoc
+	 */
+	@Override
+	public List<String> readCookieValues(HttpServletRequest request) {
+		return Collections.emptyList();
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	@Override
+	public void writeCookieValue(CookieValue cookieValue) {
+		throw newUnsupportedOperationException(NOT_IMPLEMENTED);
+	}
+}