Merge branch '2.11'

Author: cowtowncoder

release-notes/CREDITS-2.x

@@ -98,3 +98,7 @@ Tyler Carpenter-Rivers (tyler2cr@github)
 #7: Add `CsvParser.Feature.EMPTY_STRING_AS_NULL` to allow coercing empty Strings
   into `null` values
  (2.11.0)
+
+* Reported, constributed fix for #180: (yaml) YAMLGenerator serializes string with special
+  chars unquoted when using `MINIMIZE_QUOTES` mode
+ (2.11.0)

release-notes/VERSION-2.x

@@ -10,11 +10,14 @@ Modules:
 
 2.11.0 (not yet released)
 
-#7: Add `CsvParser.Feature.EMPTY_STRING_AS_NULL` to allow coercing empty Strings
+#7: (csv) Add `CsvParser.Feature.EMPTY_STRING_AS_NULL` to allow coercing empty Strings
   into `null` values
  (contributed by Tyler C-R)
-#115: JsonProperty index is not honored by CsvSchema builder
+#115: (csv) JsonProperty index is not honored by CsvSchema builder
  -- actually fixed by [databind#2555]
+#180: (yaml) YAMLGenerator serializes string with special chars unquoted when
+  using `MINIMIZE_QUOTES` mode
+ (reported, fix contributed by Timo R)
 
 2.10.4 (not yet released)
 

yaml/src/main/java/com/fasterxml/jackson/dataformat/yaml/YAMLGenerator.java

@@ -486,6 +486,7 @@ public void close() throws IOException
         if (!isClosed()) {
             // 11-Dec-2019, tatu: Should perhaps check if content is to be auto-closed...
             //   but need END_DOCUMENT regardless
+
             _emitEndDocument();
             _emit(new StreamEndEvent());
             super.close();
@@ -957,7 +958,32 @@ private boolean _valueNeedsQuoting(String name) {
         case 'N': // Null/NULL/N/No/NO
         case 'T': // True/TRUE
         case 'Y': // Y/Yes/YES
-            return MUST_QUOTE_VALUES.contains(name);
+            if (MUST_QUOTE_VALUES.contains(name)) {
+                return true;
+            }
+            break;
+        }
+        return _valueHasQuotableChar(name);
+    }
+
+    /**
+     * As per YAML <a href="https://yaml.org/spec/1.2/spec.html#id2788859">Plain Style</a>unquoted
+     * strings are restricted to a reduced charset and must be quoted in case they contain
+     * one of the following characters.
+     */
+    private static boolean _valueHasQuotableChar(String inputStr) {
+        for (int i = 0, end = inputStr.length(); i < end; ++i) {
+            switch (inputStr.charAt(i)) {
+            case ':':
+            case '#':
+            case '[':
+            case ']':
+            case '{':
+            case '}':
+            case ',':
+                return true;
+            default:
+            }
         }
         return false;
     }
@@ -966,7 +992,6 @@ protected String _lf() {
         return _outputOptions.getBestLineBreak();
     }
 
-    // @since 2.10.2
     protected void _emitStartDocument() throws IOException
     {
         Map<String,String> noTags = Collections.emptyMap();
@@ -976,12 +1001,10 @@ protected void _emitStartDocument() throws IOException
                 noTags));
     }
 
-    // @since 2.10.2
     protected void _emitEndDocument() throws IOException {
         _emit(new DocumentEndEvent(false));
     }
 
-    // @since 2.10.2
     protected final void _emit(Event e) throws IOException {
         _emitter.emit(e);
     }

yaml/src/test/java/com/fasterxml/jackson/dataformat/yaml/ser/GeneratorWithMinimizeTest.java

@@ -100,6 +100,49 @@ public void testMinimizeQuotesWithNulls() throws Exception
                 "key: nuLL", yaml);
     }
 
+    public void testMinimizeQuotesWithStringsContainingSpecialChars() throws Exception {
+        Map<String, String> content;
+
+        content = Collections.singletonMap("key", "a:b");
+        String yaml = MINIM_MAPPER.writeValueAsString(content).trim();
+        assertEquals("---\n" +
+                "key: \"a:b\"", yaml);
+
+        content = Collections.singletonMap("key", "a#b");
+        yaml = MINIM_MAPPER.writeValueAsString(content).trim();
+        assertEquals("---\n" +
+                "key: \"a#b\"", yaml);
+
+        content = Collections.singletonMap("key", "a[b");
+        yaml = MINIM_MAPPER.writeValueAsString(content).trim();
+        assertEquals("---\n" +
+                "key: \"a[b\"", yaml);
+
+        content = Collections.singletonMap("key", "a]b");
+        yaml = MINIM_MAPPER.writeValueAsString(content).trim();
+        assertEquals("---\n" +
+                "key: \"a]b\"", yaml);
+
+        content = Collections.singletonMap("key", "a{b");
+        yaml = MINIM_MAPPER.writeValueAsString(content).trim();
+        assertEquals("---\n" +
+                "key: \"a{b\"", yaml);
+
+        content = Collections.singletonMap("key", "a}b");
+        yaml = MINIM_MAPPER.writeValueAsString(content).trim();
+        assertEquals("---\n" +
+                "key: \"a}b\"", yaml);
+
+        yaml = MINIM_MAPPER.writeValueAsString(Collections.singletonMap("key", "a,b")).trim();
+        assertEquals("---\n" +
+                "key: \"a,b\"", yaml);
+
+        // plus also some edge cases (wrt "false" etc checking
+        yaml = MINIM_MAPPER.writeValueAsString(Collections.singletonMap("key", "f:off")).trim();
+        assertEquals("---\n" +
+                "key: \"f:off\"", yaml);
+    }
+
     public void testLiteralStringsMultiLine() throws Exception
     {
         Map<String, Object> content = new HashMap<String, Object>();