use Apache Commons where possible, instead of homegrown solutions (DAT-17303)

liquibase-standard/src/main/java/liquibase/util/BooleanUtil.java

@@ -1,5 +1,7 @@
 package liquibase.util;
 
+import org.apache.commons.lang3.BooleanUtils;
+
 import java.util.Arrays;
 import java.util.HashSet;
 import java.util.Set;
@@ -39,8 +41,10 @@ private static boolean isTrue(String str) {
      *  - isTrue(null)  = false
      *  - isTrue(false) = false
      *  - isTrue(true)  = true
+     * @deprecated use {@link BooleanUtils#isTrue(Boolean)} instead
      */
+    @Deprecated
     public static boolean isTrue(Boolean value) {
-        return Boolean.TRUE.equals(value);
+        return BooleanUtils.isTrue(value);
     }
 }

liquibase-standard/src/main/java/liquibase/util/CollectionUtil.java

@@ -57,46 +57,38 @@ private static <T> void permute(Map<String, T> basePermutation, List<String> rem
      * Returns passed currentValue if it is not null and creates a new ArrayList if it is null.
      * <br><br>
      * Example: values = createIfNull(values)
+     * @deprecated use {@link org.apache.commons.collections4.CollectionUtils} instead
      */
+    @Deprecated
     public static <T> List<T> createIfNull(List<T> currentValue) {
-        if (currentValue == null) {
-            return new ArrayList<>();
-        } else {
-            return currentValue;
-        }
+        return ObjectUtil.defaultIfNull(currentValue, new ArrayList<>());
     }
 
     /**
      * Returns a new empty array if the passed array is null.
+     * @deprecated use {@link org.apache.commons.collections4.CollectionUtils} instead
      */
+    @Deprecated
     public static <T> T[] createIfNull(T[] arguments) {
-        if (arguments == null) {
-            return (T[]) new Object[0];
-        } else {
-            return arguments;
-        }
+        return ObjectUtil.defaultIfNull(arguments, (T[]) new Object[0]);
     }
 
     /**
      * Returns a new empty set if the passed set is null.
+     * @deprecated use {@link org.apache.commons.collections4.CollectionUtils} instead
      */
+    @Deprecated
     public static <T> Set<T> createIfNull(Set<T> currentValue) {
-        if (currentValue == null) {
-            return new HashSet<>();
-        } else {
-            return currentValue;
-        }
+        return ObjectUtil.defaultIfNull(currentValue, new HashSet<>());
     }
 
     /**
      * Returns a new empty map if the passed map is null.
+     * @deprecated use {@link org.apache.commons.collections4.CollectionUtils} instead
      */
+    @Deprecated
     public static <T, E> Map<T, E> createIfNull(Map<T, E> currentValue) {
-        if (currentValue == null) {
-            return new HashMap<>();
-        } else {
-            return currentValue;
-        }
+        return ObjectUtil.defaultIfNull(currentValue, new HashMap<>());
     }
 
     /**

liquibase-standard/src/main/java/liquibase/util/ObjectUtil.java

@@ -5,6 +5,7 @@
 import liquibase.statement.DatabaseFunction;
 import liquibase.statement.SequenceCurrentValueFunction;
 import liquibase.statement.SequenceNextValueFunction;
+import org.apache.commons.lang3.ObjectUtils;
 
 import java.beans.IntrospectionException;
 import java.beans.Introspector;
@@ -426,13 +427,11 @@ private static void raiseOverflowException(Number number, Class targetClass) {
 
     /**
      * Return the defaultValue if the passed value is null. Otherwise, return the original value.
+     * @deprecated use {@link ObjectUtils#defaultIfNull(Object, Object)} instead
      */
+    @Deprecated
     public static <T> T defaultIfNull(T value, T defaultValue) {
-        if (value == null) {
-            return defaultValue;
-        } else {
-            return value;
-        }
+        return ObjectUtils.defaultIfNull(value, defaultValue);
     }
 
     /**