added auxiliary method makeStrWriter into JBBPTextWriter

Author: raydac

jbbp/src/main/java/com/igormaznitsa/jbbp/utils/JBBPTextWriter.java

@@ -321,6 +321,17 @@ public JBBPTextWriter(
     Radix(radix);
   }
 
+  /**
+   * Auxiliary method allows to build writer over StringWriter with system-depended next line and hex radix.
+   * The Method allows fast instance create.
+   *
+   * @since 1.4.0
+   */
+  public static JBBPTextWriter makeStrWriter() {
+    final String lineSeparator = System.setProperty("line.separator", "\n");
+    return new JBBPTextWriter(new StringWriter(), JBBPByteOrder.BIG_ENDIAN, lineSeparator, 16, "0x", ".", ";", "~", ",");
+  }
+
   protected static String makeFieldComment(final JBBPAbstractField field) {
     final String path = field.getFieldPath();
     final StringBuilder result = new StringBuilder(128);
@@ -1421,10 +1432,10 @@ protected void printAbstractFieldObject(final String postText, final JBBPAbstrac
         }
         Comment(" " + makeFieldComment(field) + postfix);
       } else if (field instanceof JBBPFieldString) {
-        final String value = ((JBBPFieldString)field).getAsString();
-        Str(value == null ? "<NULL>" : '\"'+value+'\"');
+        final String value = ((JBBPFieldString) field).getAsString();
+        Str(value == null ? "<NULL>" : '\"' + value + '\"');
         Comment(" " + makeFieldComment(field) + postfix);
-      }  else {
+      } else {
         throw new Error("Unexpected field [" + field.getClass() + ']');
       }
     }
@@ -1898,7 +1909,7 @@ protected void onFieldString(final Object obj, final Field field, final Bin anno
         ensureValueMode();
         final String prefix = prefixValue;
         prefixValue = "";
-        printValueString(value == null ? "<NULL>" : '\"'+value+'\"');
+        printValueString(value == null ? "<NULL>" : '\"' + value + '\"');
         prefixValue = prefix;
         if (this.arrayCounter == 0) {
           Comment(makeFieldDescription(field, annotation));

jbbp/src/test/java/com/igormaznitsa/jbbp/utils/JBBPTextWriterTest.java

@@ -41,6 +41,12 @@ private static JBBPTextWriter makeWriter() {
     return new JBBPTextWriter(new StringWriter(), JBBPByteOrder.BIG_ENDIAN, "\n", 16, "0x", ".", ";", "~", ",");
   }
 
+  @Test
+  public void testMakeStrWriter() throws Exception {
+    final String generated = JBBPTextWriter.makeStrWriter().Int(12).Byte(34).BR().Comment("Huzzaaa").Close().toString();
+    assertEquals(String.format(".0x0000000C,0x22%n;Huzzaaa"),generated);
+  }
+
   @Test
   public void testConstructor_Default() {
     final JBBPTextWriter writer = new JBBPTextWriter();
@@ -729,7 +735,7 @@ class SomeClass {
       @Bin(outOrder = 6, comment = "some string")
       String str = "Hello String";
       @Bin(outOrder = 7, comment = "some string array")
-      String [] strs = new String[] {"Hello", null, "World"};
+      String[] strs = new String[] {"Hello", null, "World"};
     }
 
     final SomeClass cl = new SomeClass();
@@ -860,6 +866,19 @@ public void testBin_AllEasyTypes_NonMappedRawStruct() throws Exception {
     assertFile("txtwrtrjbbpobj1.txt", text);
   }
 
+  @Test
+  public void testBin_ValField() throws Exception {
+    final JBBPParser parser = JBBPParser.prepare("val:123 a;");
+    final String text = makeWriter().SetMaxValuesPerLine(16).Bin(parser.parse(new byte[0])).Close().toString();
+    assertEquals("~--------------------------------------------------------------------------------\n" +
+        "; Start {} \n" +
+        "~--------------------------------------------------------------------------------\n" +
+        "    .0x0000007B; int a\n" +
+        "~--------------------------------------------------------------------------------\n" +
+        "; End {} \n" +
+        "~--------------------------------------------------------------------------------\n", text);
+  }
+
   @Test
   public void testBin_AllEasyTypes_Anonymous_NonMappedRawStruct() throws Exception {
     final JBBPParser parser = JBBPParser.prepare("bit:2; bit:6; byte; ubyte; short; ushort; int; long; bool; stringj;");