Support annotating additionalProperties field.

jsonschema2pojo-core/src/main/java/org/jsonschema2pojo/AbstractAnnotator.java

@@ -68,5 +68,9 @@ public void enumValueMethod(JMethod valueMethod) {
     public boolean isAdditionalPropertiesSupported() {
         return true;
     }
+
+    @Override
+    public void additionalPropertiesField(JFieldVar field, JDefinedClass clazz, String propertyName) {
+    }
 
 }

jsonschema2pojo-core/src/main/java/org/jsonschema2pojo/Annotator.java

@@ -148,4 +148,6 @@ public interface Annotator {
      *         properties'.
      */
     boolean isAdditionalPropertiesSupported();
+
+	void additionalPropertiesField(JFieldVar field, JDefinedClass clazz, String propertyName);
 }

jsonschema2pojo-core/src/main/java/org/jsonschema2pojo/CompositeAnnotator.java

@@ -114,5 +114,12 @@ public boolean isAdditionalPropertiesSupported() {
         }
         return true;
     }
+
+    @Override
+    public void additionalPropertiesField(JFieldVar field, JDefinedClass clazz, String propertyName) {
+        for (Annotator annotator : annotators) {
+            annotator.additionalPropertiesField(field, clazz, propertyName);
+        }
+    }
 
 }

jsonschema2pojo-core/src/main/java/org/jsonschema2pojo/Jackson1Annotator.java

@@ -21,6 +21,7 @@
 import org.codehaus.jackson.annotate.JsonAnyGetter;
 import org.codehaus.jackson.annotate.JsonAnySetter;
 import org.codehaus.jackson.annotate.JsonCreator;
+import org.codehaus.jackson.annotate.JsonIgnore;
 import org.codehaus.jackson.annotate.JsonProperty;
 import org.codehaus.jackson.annotate.JsonPropertyOrder;
 import org.codehaus.jackson.annotate.JsonValue;
@@ -93,4 +94,9 @@ public boolean isAdditionalPropertiesSupported() {
         return true;
     }
 
+    @Override
+    public void additionalPropertiesField(JFieldVar field, JDefinedClass clazz, String propertyName) {
+    	field.annotate(JsonIgnore.class);
+    }
+
 }

jsonschema2pojo-core/src/main/java/org/jsonschema2pojo/Jackson2Annotator.java

@@ -21,6 +21,7 @@
 import com.fasterxml.jackson.annotation.JsonAnyGetter;
 import com.fasterxml.jackson.annotation.JsonAnySetter;
 import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonPropertyOrder;
@@ -93,4 +94,8 @@ public boolean isAdditionalPropertiesSupported() {
         return true;
     }
 
+    @Override
+    public void additionalPropertiesField(JFieldVar field, JDefinedClass clazz, String propertyName) {
+    	field.annotate(JsonIgnore.class);
+    }
 }

jsonschema2pojo-core/src/main/java/org/jsonschema2pojo/rules/AdditionalPropertiesRule.java

@@ -114,6 +114,9 @@ private JFieldVar addAdditionalPropertiesField(JDefinedClass jclass, JType prope
         propertiesMapImplType = propertiesMapImplType.narrow(jclass.owner().ref(String.class), propertyType.boxify());
 
         JFieldVar field = jclass.field(JMod.PRIVATE, propertiesMapType, "additionalProperties");
+
+        ruleFactory.getAnnotator().additionalPropertiesField(field, jclass, "additionalProperties");
+
         field.init(JExpr._new(propertiesMapImplType));
 
         return field;

jsonschema2pojo-integration-tests/src/test/java/org/jsonschema2pojo/integration/AdditionalPropertiesIT.java

@@ -30,7 +30,10 @@
 
 import org.junit.Test;
 
+import com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility;
+import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.MapperFeature;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException;
 
@@ -146,5 +149,25 @@ public void additionalPropertiesOfBooleanTypeOnly() throws SecurityException, No
         classWithNoAdditionalProperties.getMethod("setAdditionalProperty", String.class, boolean.class);
 
     }
+
+
+    @Test
+    public void additionalPropertiesWorkWithAllVisibility() throws ClassNotFoundException, SecurityException, NoSuchMethodException, JsonProcessingException, IOException {
+    	mapper.configure(MapperFeature.AUTO_DETECT_GETTERS, false);
+    	mapper.configure(MapperFeature.AUTO_DETECT_SETTERS, false);
+    	mapper.setVisibilityChecker(mapper.getVisibilityChecker().with(Visibility.ANY));
+
+        ClassLoader resultsClassLoader = generateAndCompile("/schema/additionalProperties/defaultAdditionalProperties.json", "com.example");
+
+        Class<?> classWithAdditionalProperties = resultsClassLoader.loadClass("com.example.DefaultAdditionalProperties");
+        String jsonWithAdditionalProperties = "{\"a\":1, \"b\":2};";
+        Object instanceWithAdditionalProperties = mapper.readValue(jsonWithAdditionalProperties, classWithAdditionalProperties);
+
+        JsonNode jsonNode = mapper.readTree(mapper.writeValueAsString(instanceWithAdditionalProperties));
+
+        assertThat(jsonNode.path("a").asText(), is("1"));
+        assertThat(jsonNode.path("b").asInt(), is(2));
+        assertThat(jsonNode.has("additionalProperties"), is(false));
+    }
 
 }

jsonschema2pojo-integration-tests/src/test/java/org/jsonschema2pojo/integration/config/CustomAnnotatorIT.java

@@ -29,7 +29,9 @@
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 import com.fasterxml.jackson.databind.JsonNode;
+
 import org.jsonschema2pojo.Annotator;
+
 import com.sun.codemodel.JDefinedClass;
 import com.sun.codemodel.JFieldVar;
 import com.sun.codemodel.JMethod;
@@ -155,6 +157,13 @@ public boolean isAdditionalPropertiesSupported() {
             return true;
         }
 
+		@Override
+		public void additionalPropertiesField(JFieldVar field,
+				JDefinedClass clazz, String propertyName) {
+			field.annotate(Deprecated.class);
+
+		}
+
     }
 
 }