Add abstract utility class containing functions for managing Sessions.

spring-session-data-geode/src/main/java/org/springframework/session/data/gemfire/support/SessionUtils.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2018 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
+ *
+ *      http://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.support;
+
+import java.util.Optional;
+
+import org.springframework.lang.Nullable;
+import org.springframework.session.Session;
+import org.springframework.util.StringUtils;
+
+/**
+ * Abstract utility class containing functions for managing {@link Session} objects.
+ *
+ * @author John Blum
+ * @see org.springframework.session.Session
+ * @since 2.1.2
+ */
+public abstract class SessionUtils {
+
+	/**
+	 * Determines whether the given {@link Object Session ID} is valid.
+	 *
+	 * @param sessionId {@link Object ID} of a {@link Session} to evaluate.
+	 * @return a boolean value indicating whether the given {@link Object Session ID} is valid.
+	 */
+	public static boolean isValidSessionId(@Nullable Object sessionId) {
+
+		return Optional.ofNullable(sessionId)
+			.map(Object::toString)
+			.filter(StringUtils::hasText)
+			.isPresent();
+	}
+}

spring-session-data-geode/src/test/java/org/springframework/session/data/gemfire/support/SessionUtilsUnitTests.java

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+/*
+ * Copyright 2018 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
+ *
+ *      http://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.support;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.Test;
+
+/**
+ * Unit Tests for {@link SessionUtils}.
+ *
+ * @author John Blum
+ * @see org.springframework.session.Session
+ * @see org.springframework.session.data.gemfire.support.SessionUtils
+ * @since 2.1.2
+ */
+public class SessionUtilsUnitTests {
+
+	@Test
+	public void isValidSessionIdWithValidSessionId() {
+		assertThat(SessionUtils.isValidSessionId("1")).isTrue();
+	}
+
+	private void testIsValidSessionIdWithInvalidSessionId(Object sessionId) {
+		assertThat(SessionUtils.isValidSessionId(sessionId)).isFalse();
+	}
+
+	@Test
+	public void isValidSessionIdWithEmptySessionId() {
+		testIsValidSessionIdWithInvalidSessionId("");
+	}
+
+	@Test
+	public void isValidSessionIdWithNullSessionId() {
+		testIsValidSessionIdWithInvalidSessionId(null);
+	}
+
+	@Test
+	public void isValidSessionIdWithUnspecifiedSessionId() {
+		testIsValidSessionIdWithInvalidSessionId("  ");
+	}
+}