Added sort validation

This commit now validates that the value passed via a PageRequest to
sort the results by is a valid value.

Resolves #739

Fixed to allow for all letter cases

spring-cloud-task-core/src/main/java/org/springframework/cloud/task/repository/dao/JdbcTaskExecutionDao.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2015-2019 the original author or authors.
+ * Copyright 2015-2020 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.
@@ -22,6 +22,7 @@ import java.sql.Types;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Date;
+import java.util.HashSet;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
@@ -58,6 +59,7 @@ import org.springframework.util.StringUtils;
  * @author Gunnar Hillert
  * @author David Turanski
  * @author Ilayaperumal Gopinathan
+ * @author Michael Minella
  */
 public class JdbcTaskExecutionDao implements TaskExecutionDao {
 
@@ -161,6 +163,21 @@ public class JdbcTaskExecutionDao implements TaskExecutionDao {
 
 	private DataFieldMaxValueIncrementer taskIncrementer;
 
+	private static final Set<String> validSortColumns = new HashSet<>(10);
+
+	static {
+		validSortColumns.add("TASK_EXECUTION_ID");
+		validSortColumns.add("START_TIME");
+		validSortColumns.add("END_TIME");
+		validSortColumns.add("TASK_NAME");
+		validSortColumns.add("EXIT_CODE");
+		validSortColumns.add("EXIT_MESSAGE");
+		validSortColumns.add("ERROR_MESSAGE");
+		validSortColumns.add("LAST_UPDATED");
+		validSortColumns.add("EXTERNAL_EXECUTION_ID");
+		validSortColumns.add("PARENT_EXECUTION_ID");
+	}
+
 	/**
 	 * Initializes the JdbcTaskExecutionDao.
 	 * @param dataSource used by the dao to execute queries and update the tables.
@@ -511,8 +528,13 @@ public class JdbcTaskExecutionDao implements TaskExecutionDao {
 
 		if (sort != null) {
 			for (Sort.Order sortOrder : sort) {
-				sortOrderMap.put(sortOrder.getProperty(),
+				if (validSortColumns.contains(sortOrder.getProperty().toUpperCase())) {
+					sortOrderMap.put(sortOrder.getProperty(),
 						sortOrder.isAscending() ? Order.ASCENDING : Order.DESCENDING);
+				}
+				else {
+					throw new IllegalArgumentException(String.format("Invalid sort option selected: %s", sortOrder.getProperty()));
+				}
 			}
 		}
 

spring-cloud-task-core/src/test/java/org/springframework/cloud/task/repository/dao/JdbcTaskExecutionDaoTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2015-2019 the original author or authors.
+ * Copyright 2015-2020 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.
@@ -46,12 +46,14 @@ import org.springframework.test.context.junit.jupiter.SpringExtension;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
 
 /**
  * Executes unit tests on JdbcTaskExecutionDao.
  *
  * @author Glenn Renfro
  * @author Gunnar Hillert
+ * @author Michael Minella
  */
 @ExtendWith(SpringExtension.class)
 @ContextConfiguration(
@@ -209,6 +211,31 @@ public class JdbcTaskExecutionDaoTests extends BaseTaskExecutionDaoTestCases {
 						expectedTaskExecution.getExecutionId()));
 	}
 
+	@Test
+	@DirtiesContext
+	public void testFindRunningTaskExecutions() {
+		initializeRepositoryNotInOrderWithMultipleTaskExecutions();
+		assertThat(this.dao.findRunningTaskExecutions("FOO1", PageRequest.of(1, Integer.MAX_VALUE, Sort.by("START_TIME"))).getTotalElements())
+			.isEqualTo(4);
+	}
+
+	@Test
+	@DirtiesContext
+	public void testFindRunningTaskExecutionsIllegalSort() {
+		initializeRepositoryNotInOrderWithMultipleTaskExecutions();
+		assertThatThrownBy(() -> this.dao.findRunningTaskExecutions("FOO1", PageRequest.of(1, Integer.MAX_VALUE, Sort.by("ILLEGAL_SORT"))).getTotalElements())
+			.isInstanceOf(IllegalArgumentException.class)
+			.hasMessage("Invalid sort option selected: ILLEGAL_SORT");
+	}
+
+	@Test
+	@DirtiesContext
+	public void testFindRunningTaskExecutionsSortWithDifferentCase() {
+		initializeRepositoryNotInOrderWithMultipleTaskExecutions();
+		assertThat(this.dao.findRunningTaskExecutions("FOO1", PageRequest.of(1, Integer.MAX_VALUE, Sort.by("StArT_TiMe"))).getTotalElements())
+			.isEqualTo(4);
+	}
+
 	private TaskExecution initializeTaskExecutionWithExternalExecutionId() {
 		TaskExecution expectedTaskExecution = TestVerifierUtils
 				.createSampleTaskExecutionNoArg();