Fix edge case of getter/setter naming when second char is uppercase

A little known part of the been spec, since a getter/setter with a
capital letter in second position indicates that the first char is also
a capital. If the first char is in fact not a capital, then it needs to
be lowercase in the getter/setter also.

See also:

* https://stackoverflow.com/questions/8969112/confused-about-naming-of-javabean-properties-with-respect-to-getters-and-setter
* FasterXML/jackson-databind#653
* https://bugs.eclipse.org/bugs/show_bug.cgi?id=322223

Fixes #756

jsonschema2pojo-core/src/main/java/org/jsonschema2pojo/util/NameHelper.java

@@ -103,10 +103,16 @@ public String getPropertyName(String jsonFieldName, JsonNode node) {
      * @return
      */
     public String getSetterName(String propertyName, JsonNode node) {
-        propertyName = getFieldName(propertyName, node);
-
-        propertyName = replaceIllegalCharacters(propertyName);
-        String setterName = "set" + capitalize(capitalizeTrailingWords(propertyName));
+        propertyName = getPropertyNameForAccessor(propertyName, node);
+
+        String prefix = "set";
+
+        String setterName;
+        if (propertyName.length() > 1 && Character.isUpperCase(propertyName.charAt(1))) {
+            setterName = prefix + propertyName;
+        } else {
+            setterName = prefix + capitalize(propertyName);
+        }
 
         if (setterName.equals("setClass")) {
             setterName = "setClass_";
@@ -140,16 +146,28 @@ public String getFieldName(String propertyName, JsonNode node) {
      * @return
      */
     public String getGetterName(String propertyName, JType type, JsonNode node) {
-        propertyName = getFieldName(propertyName, node);
-
+        propertyName = getPropertyNameForAccessor(propertyName, node);
+        
         String prefix = type.equals(type.owner()._ref(boolean.class)) ? "is" : "get";
-        propertyName = replaceIllegalCharacters(propertyName);
-        String getterName = prefix + capitalize(capitalizeTrailingWords(propertyName));
+
+        String getterName;
+        if (propertyName.length() > 1 && Character.isUpperCase(propertyName.charAt(1))) {
+            getterName = prefix + propertyName;
+        } else {
+            getterName = prefix + capitalize(propertyName);
+        }
 
         if (getterName.equals("getClass")) {
             getterName = "getClass_";
         }
 
         return getterName;
     }
+
+    private String getPropertyNameForAccessor(String jsonPropertyName, JsonNode node) {
+        jsonPropertyName = getFieldName(jsonPropertyName, node);
+        jsonPropertyName = replaceIllegalCharacters(jsonPropertyName);
+        jsonPropertyName = capitalizeTrailingWords(jsonPropertyName);
+        return jsonPropertyName;
+    }
 }

jsonschema2pojo-core/src/test/java/org/jsonschema2pojo/util/NameHelperTest.java

@@ -0,0 +1,50 @@
+/**
+ * Copyright © 2010-2017 Nokia
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jsonschema2pojo.util;
+
+import static org.hamcrest.Matchers.*;
+import static org.junit.Assert.*;
+
+import org.jsonschema2pojo.DefaultGenerationConfig;
+import org.junit.Test;
+
+import com.fasterxml.jackson.databind.node.JsonNodeFactory;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import com.sun.codemodel.JCodeModel;
+
+public class NameHelperTest {
+
+    private static final ObjectNode NODE = JsonNodeFactory.instance.objectNode();
+
+    private final NameHelper nameHelper = new NameHelper(new DefaultGenerationConfig());
+
+    @Test
+    public void testGetterNamedCorrectly() {
+        assertThat(nameHelper.getGetterName("foo", new JCodeModel().BOOLEAN, NODE), is("isFoo"));
+        assertThat(nameHelper.getGetterName("foo", new JCodeModel().INT, NODE), is("getFoo"));
+        assertThat(nameHelper.getGetterName("oAuth2State", new JCodeModel().INT, NODE), is("getoAuth2State"));
+        assertThat(nameHelper.getGetterName("URL", new JCodeModel().INT, NODE), is("getURL"));
+    }
+
+    @Test
+    public void testSetterNamedCorrectly() {
+        assertThat(nameHelper.getSetterName("foo", NODE), is("setFoo"));
+        assertThat(nameHelper.getSetterName("oAuth2State", NODE), is("setoAuth2State"));
+        assertThat(nameHelper.getSetterName("URL", NODE), is("setURL"));
+    }
+
+}