Change utility and factory class constructors from private to protected

src/main/java/org/codelibs/core/beans/factory/BeanDescFactory.java

@@ -47,7 +47,7 @@ public abstract class BeanDescFactory {
     /**
      * Do not instantiate.
      */
-    private BeanDescFactory() {
+    protected BeanDescFactory() {
     }
 
     /** True if initialized */

src/main/java/org/codelibs/core/beans/factory/ParameterizedClassDescFactory.java

@@ -58,7 +58,7 @@ public abstract class ParameterizedClassDescFactory {
     /**
      * Do not instantiate.
      */
-    private ParameterizedClassDescFactory() {
+    protected ParameterizedClassDescFactory() {
     }
 
     /**

src/main/java/org/codelibs/core/beans/util/BeanUtil.java

@@ -83,7 +83,7 @@ public abstract class BeanUtil {
     /**
      * Do not instantiate.
      */
-    private BeanUtil() {
+    protected BeanUtil() {
     }
 
     /** Default options */

src/main/java/org/codelibs/core/beans/util/CopyOptionsUtil.java

@@ -48,7 +48,7 @@ public abstract class CopyOptionsUtil {
     /**
      * Do not instantiate.
      */
-    private CopyOptionsUtil() {
+    protected CopyOptionsUtil() {
     }
 
     /**

src/main/java/org/codelibs/core/collection/ArrayUtil.java

@@ -37,7 +37,7 @@ public abstract class ArrayUtil {
     /**
      * Do not instantiate.
      */
-    private ArrayUtil() {
+    protected ArrayUtil() {
     }
 
     /**

src/main/java/org/codelibs/core/collection/CollectionsUtil.java

@@ -63,7 +63,7 @@ public abstract class CollectionsUtil {
     /**
      * Do not instantiate.
      */
-    private CollectionsUtil() {
+    protected CollectionsUtil() {
     }
 
     /**

src/main/java/org/codelibs/core/concurrent/CommonPoolUtil.java

@@ -22,10 +22,10 @@
 /**
  * Utility for common pool operations.
  */
-public class CommonPoolUtil {
+public abstract class CommonPoolUtil {
     private static final Logger logger = Logger.getLogger(CommonPoolUtil.class);
 
-    private CommonPoolUtil() {
+    protected CommonPoolUtil() {
         // nothing
     }
 

src/main/java/org/codelibs/core/convert/BigDecimalConversionUtil.java

@@ -30,7 +30,7 @@ public abstract class BigDecimalConversionUtil {
     /**
      * Do not instantiate.
      */
-    private BigDecimalConversionUtil() {
+    protected BigDecimalConversionUtil() {
     }
 
     /**

src/main/java/org/codelibs/core/convert/BigIntegerConversionUtil.java

@@ -27,7 +27,7 @@ public abstract class BigIntegerConversionUtil {
     /**
      * Do not instantiate.
      */
-    private BigIntegerConversionUtil() {
+    protected BigIntegerConversionUtil() {
     }
 
     /**

src/main/java/org/codelibs/core/convert/BinaryConversionUtil.java

@@ -27,7 +27,7 @@ public abstract class BinaryConversionUtil {
     /**
      * Do not instantiate.
      */
-    private BinaryConversionUtil() {
+    protected BinaryConversionUtil() {
     }
 
     /**

src/main/java/org/codelibs/core/convert/BooleanConversionUtil.java

@@ -25,7 +25,7 @@ public abstract class BooleanConversionUtil {
     /**
      * Do not instantiate.
      */
-    private BooleanConversionUtil() {
+    protected BooleanConversionUtil() {
     }
 
     /**

src/main/java/org/codelibs/core/convert/ByteConversionUtil.java

@@ -30,7 +30,7 @@ public abstract class ByteConversionUtil {
     /**
      * Do not instantiate.
      */
-    private ByteConversionUtil() {
+    protected ByteConversionUtil() {
     }
 
     /**

src/main/java/org/codelibs/core/convert/CalendarConversionUtil.java

@@ -31,7 +31,7 @@ public abstract class CalendarConversionUtil {
     /**
      * Do not instantiate.
      */
-    private CalendarConversionUtil() {
+    protected CalendarConversionUtil() {
     }
 
     /**

src/main/java/org/codelibs/core/convert/DateConversionUtil.java

@@ -107,7 +107,7 @@ public abstract class DateConversionUtil {
     /**
      * Do not instantiate.
      */
-    private DateConversionUtil() {
+    protected DateConversionUtil() {
     }
 
     /** Array of styles held by {@link DateFormat}. */

src/main/java/org/codelibs/core/convert/DoubleConversionUtil.java

@@ -30,7 +30,7 @@ public abstract class DoubleConversionUtil {
     /**
      * Do not instantiate.
      */
-    private DoubleConversionUtil() {
+    protected DoubleConversionUtil() {
     }
 
     /**

src/main/java/org/codelibs/core/convert/FloatConversionUtil.java

@@ -30,7 +30,7 @@ public abstract class FloatConversionUtil {
     /**
      * Do not instantiate.
      */
-    private FloatConversionUtil() {
+    protected FloatConversionUtil() {
     }
 
     /**

src/main/java/org/codelibs/core/convert/IntegerConversionUtil.java

@@ -30,7 +30,7 @@ public abstract class IntegerConversionUtil {
     /**
      * Do not instantiate.
      */
-    private IntegerConversionUtil() {
+    protected IntegerConversionUtil() {
     }
 
     /**

src/main/java/org/codelibs/core/convert/LongConversionUtil.java

@@ -30,7 +30,7 @@ public abstract class LongConversionUtil {
     /**
      * Do not instantiate.
      */
-    private LongConversionUtil() {
+    protected LongConversionUtil() {
     }
 
     /**

src/main/java/org/codelibs/core/convert/NumberConversionUtil.java

@@ -33,7 +33,7 @@ public abstract class NumberConversionUtil {
     /**
      * Do not instantiate.
      */
-    private NumberConversionUtil() {
+    protected NumberConversionUtil() {
     }
 
     /**

src/main/java/org/codelibs/core/convert/ShortConversionUtil.java

@@ -30,7 +30,7 @@ public abstract class ShortConversionUtil {
     /**
      * Do not instantiate.
      */
-    private ShortConversionUtil() {
+    protected ShortConversionUtil() {
     }
 
     /**

src/main/java/org/codelibs/core/convert/StringConversionUtil.java

@@ -32,7 +32,7 @@ public abstract class StringConversionUtil {
     /**
      * Do not instantiate.
      */
-    private StringConversionUtil() {
+    protected StringConversionUtil() {
     }
 
     /** WAVE DASH */

src/main/java/org/codelibs/core/convert/TimeConversionUtil.java

@@ -110,7 +110,7 @@ public abstract class TimeConversionUtil {
     /**
      * Do not instantiate.
      */
-    private TimeConversionUtil() {
+    protected TimeConversionUtil() {
     }
 
     /** Array of styles held by {@link DateFormat} */

src/main/java/org/codelibs/core/convert/TimestampConversionUtil.java

@@ -86,7 +86,7 @@ public abstract class TimestampConversionUtil {
     /**
      * Do not instantiate.
      */
-    private TimestampConversionUtil() {
+    protected TimestampConversionUtil() {
     }
 
     /** Array of styles held by {@link DateFormat} */

src/main/java/org/codelibs/core/io/ClassTraversalUtil.java

@@ -39,7 +39,7 @@ public abstract class ClassTraversalUtil {
     /**
      * Do not instantiate.
      */
-    private ClassTraversalUtil() {
+    protected ClassTraversalUtil() {
     }
 
     /** The file extension for class files. */

src/main/java/org/codelibs/core/io/CloseableUtil.java

@@ -32,7 +32,7 @@ public abstract class CloseableUtil {
     /**
      * Do not instantiate.
      */
-    private CloseableUtil() {
+    protected CloseableUtil() {
     }
 
     private static final Logger logger = Logger.getLogger(CloseableUtil.class);

src/main/java/org/codelibs/core/io/CopyUtil.java

@@ -119,7 +119,7 @@ public abstract class CopyUtil {
     /**
      * Do not instantiate.
      */
-    private CopyUtil() {
+    protected CopyUtil() {
     }
 
     /** Buffer size used for copying. */

src/main/java/org/codelibs/core/io/FileUtil.java

@@ -46,7 +46,7 @@ public abstract class FileUtil {
     /**
      * Do not instantiate.
      */
-    private FileUtil() {
+    protected FileUtil() {
     }
 
     /** The encoding name for UTF-8. */

src/main/java/org/codelibs/core/io/InputStreamUtil.java

@@ -35,7 +35,7 @@ public abstract class InputStreamUtil {
     /**
      * Do not instantiate.
      */
-    private InputStreamUtil() {
+    protected InputStreamUtil() {
     }
 
     /** Default buffer size. */

src/main/java/org/codelibs/core/io/OutputStreamUtil.java

@@ -34,7 +34,7 @@ public abstract class OutputStreamUtil {
     /**
      * Do not instantiate.
      */
-    private OutputStreamUtil() {
+    protected OutputStreamUtil() {
     }
 
     /**

src/main/java/org/codelibs/core/io/PropertiesUtil.java

@@ -41,7 +41,7 @@ public abstract class PropertiesUtil {
     /**
      * Do not instantiate.
      */
-    private PropertiesUtil() {
+    protected PropertiesUtil() {
     }
 
     /**

src/main/java/org/codelibs/core/io/ReaderUtil.java

@@ -39,7 +39,7 @@ public abstract class ReaderUtil {
     /**
      * Do not instantiate.
      */
-    private ReaderUtil() {
+    protected ReaderUtil() {
     }
 
     /** Default buffer size */

src/main/java/org/codelibs/core/io/ResourceBundleUtil.java

@@ -37,7 +37,7 @@ public abstract class ResourceBundleUtil {
     /**
      * Do not instantiate.
      */
-    private ResourceBundleUtil() {
+    protected ResourceBundleUtil() {
     }
 
     /**

src/main/java/org/codelibs/core/io/ResourceTraversalUtil.java

@@ -42,7 +42,7 @@ public abstract class ResourceTraversalUtil {
     /**
      * Do not instantiate.
      */
-    private ResourceTraversalUtil() {
+    protected ResourceTraversalUtil() {
     }
 
     /**

src/main/java/org/codelibs/core/io/ResourceUtil.java

@@ -39,7 +39,7 @@ public abstract class ResourceUtil {
     /**
      * Do not instantiate.
      */
-    private ResourceUtil() {
+    protected ResourceUtil() {
     }
 
     /**

src/main/java/org/codelibs/core/io/SerializeUtil.java

@@ -37,7 +37,7 @@ public abstract class SerializeUtil {
     /**
      * Do not instantiate.
      */
-    private SerializeUtil() {
+    protected SerializeUtil() {
     }
 
     private static final int BYTE_ARRAY_SIZE = 8 * 1024;

src/main/java/org/codelibs/core/io/TraversalUtil.java

@@ -69,7 +69,7 @@ public abstract class TraversalUtil {
     /**
      * Do not instantiate.
      */
-    private TraversalUtil() {
+    protected TraversalUtil() {
     }
 
     /** An empty array of {@link Traverser}. */

src/main/java/org/codelibs/core/io/WriterUtil.java

@@ -38,7 +38,7 @@ public abstract class WriterUtil {
     /**
      * Do not instantiate.
      */
-    private WriterUtil() {
+    protected WriterUtil() {
     }
 
     /**

src/main/java/org/codelibs/core/jar/JarFileUtil.java

@@ -43,7 +43,7 @@ public abstract class JarFileUtil {
     /**
      * Do not instantiate.
      */
-    private JarFileUtil() {
+    protected JarFileUtil() {
     }
 
     private static final Logger logger = Logger.getLogger(JarFileUtil.class);

src/main/java/org/codelibs/core/jar/JarInputStreamUtil.java

@@ -34,7 +34,7 @@ public abstract class JarInputStreamUtil {
     /**
      * Do not instantiate.
      */
-    private JarInputStreamUtil() {
+    protected JarInputStreamUtil() {
     }
 
     /**

src/main/java/org/codelibs/core/lang/AnnotationUtil.java

@@ -35,7 +35,7 @@ public abstract class AnnotationUtil {
     /**
      * Do not instantiate.
      */
-    private AnnotationUtil() {
+    protected AnnotationUtil() {
     }
 
     /**

src/main/java/org/codelibs/core/lang/ClassLoaderUtil.java

@@ -40,7 +40,7 @@ public abstract class ClassLoaderUtil {
     /**
      * Do not instantiate.
      */
-    private ClassLoaderUtil() {
+    protected ClassLoaderUtil() {
     }
 
     /**

src/main/java/org/codelibs/core/lang/ClassUtil.java

@@ -42,7 +42,7 @@ public abstract class ClassUtil {
     /**
      * Do not instantiate.
      */
-    private ClassUtil() {
+    protected ClassUtil() {
     }
 
     /** Map from wrapper types to primitive types */

src/main/java/org/codelibs/core/lang/ConstructorUtil.java

@@ -35,7 +35,7 @@ public abstract class ConstructorUtil {
     /**
      * Do not instantiate.
      */
-    private ConstructorUtil() {
+    protected ConstructorUtil() {
     }
 
     /**

src/main/java/org/codelibs/core/lang/FieldUtil.java

@@ -35,7 +35,7 @@ public abstract class FieldUtil {
     /**
      * Do not instantiate.
      */
-    private FieldUtil() {
+    protected FieldUtil() {
     }
 
     /**