Jackson PropertyNamingStrategy

If a special JSON property mapping is required for a Jackson Mapper, a PropertyNamingStrategy class sample is here, the class should be used like the following:

new ObjectMapper().setPropertyNamingStrategy(new CstyleStrategy());

import com.fasterxml.jackson.databind.PropertyNamingStrategy; import com.fasterxml.jackson.databind.cfg.MapperConfig; import com.fasterxml.jackson.databind.introspect.AnnotatedField; import com.fasterxml.jackson.databind.introspect.AnnotatedMethod; public class CstyleStrategy extends PropertyNamingStrategy {        private static final long serialVersionUID = 1L;        @Override        public String nameForField(final MapperConfig<?> config, final AnnotatedField field, final String defaultName) {              return field.getName();        }        @Override        public String nameForGetterMethod(final MapperConfig<?> config, final AnnotatedMethod method, final String defaultName) {              return convert(method, defaultName);        }        @Override        public String nameForSetterMethod(final MapperConfig<?> config, final AnnotatedMethod method, final String defaultName) {              return convert(method, defaultName);        }        private String convert(final AnnotatedMethod method, final String input) {              final Class<?> clazz = method.getDeclaringClass();              final String className = clazz.getCanonicalName();              String result = null;              if (className.contains("mySpecialType")) {                     StringBuilder resultBuffer = new StringBuilder();                     for (int i = 0, len = input.length(); i < len; ++i) {                            char c = input.charAt(i);                            if (Character.isUpperCase(c)) {                                  resultBuffer.append('_');                                  c = Character.toLowerCase(c);                            }                            resultBuffer.append(c);                     }                     result = resultBuffer.toString();              } else {                     result = input;              }              return result.toString();        } }