How to use

GuiceBeanProvider

in

org.apache.shindig.protocol.conversion.xstream

public GuiceBeanConverter(Mapper mapper, Injector injector) {
 this(mapper, new GuiceBeanProvider(injector));
}

public boolean propertyDefinedInClass(String name, Class<?> type) {
 return getProperty(name, type) != null;
}

public void marshal(final Object source,
  final HierarchicalStreamWriter writer, final MarshallingContext context) {
 beanProvider.visitSerializableProperties(source,
   new GuiceBeanProvider.Visitor() {
    public boolean shouldVisit(String name, Class<?> definedIn) {

public Object unmarshal(final HierarchicalStreamReader reader,
  final UnmarshallingContext context) {
 final Object result = instantiateNewInstance(context);
 while (reader.hasMoreChildren()) {
  reader.moveDown();
  String propertyName = mapper.realMember(result.getClass(), reader
    .getNodeName());
  boolean propertyExistsInClass = beanProvider.propertyDefinedInClass(
    propertyName, result.getClass());
  if (propertyExistsInClass) {
   Class<?> type = determineType(reader, result, propertyName);
   Object value = context.convertAnother(result, type);
   beanProvider.writeProperty(result, propertyName, value);
  } else if (mapper.shouldSerializeMember(result.getClass(), propertyName)) {
   throw new ConversionException("Property '" + propertyName
     + "' not defined in class " + result.getClass().getName());
  }
  reader.moveUp();
 }
 return result;
}

private Object instantiateNewInstance(UnmarshallingContext context) {
 Object result = context.currentObject();
 if (result == null) {
  result = beanProvider.newInstance(context.getRequiredType());
 }
 return result;
}

 private Class<?> determineType(HierarchicalStreamReader reader,
   Object result, String fieldName) {
  final String classAttributeName = mapper.attributeForAlias("class");
  String classAttribute = reader.getAttribute(classAttributeName);
  if (classAttribute != null) {
   return mapper.realClass(classAttribute);
  } else {
   return mapper.defaultImplementationOf(beanProvider.getPropertyType(
     result, fieldName));
  }
 }
}

public void visitSerializableProperties(Object object, Visitor visitor) {
 for (PropertyDescriptor property : getSerializableProperties(object)) {
  try {
   Method readMethod = property.getReadMethod();
   String name = property.getName();
   Class<?> definedIn = readMethod.getDeclaringClass();
   if (visitor.shouldVisit(name, definedIn)) {
    Object value = readMethod.invoke(object);
    visitor.visit(name, property.getPropertyType(), definedIn, value);
   }
  } catch (IllegalArgumentException e) {
   throw new ObjectAccessException("Could not get property "
     + object.getClass() + '.' + property.getName(), e);
  } catch (IllegalAccessException e) {
   throw new ObjectAccessException("Could not get property "
     + object.getClass() + '.' + property.getName(), e);
  } catch (InvocationTargetException e) {
   throw new ObjectAccessException("Could not get property "
     + object.getClass() + '.' + property.getName(), e);
  }
 }
}

private List<PropertyDescriptor> getSerializableProperties(Object object) {
 Map<String, PropertyDescriptor> nameMap = getNameMap(object.getClass());
 Set<String> names = (propertyNameComparator == null) ? nameMap.keySet() :
  ImmutableSortedSet.orderedBy(propertyNameComparator).addAll(nameMap.keySet()).build();
 List<PropertyDescriptor> result = Lists.newArrayListWithCapacity(nameMap.size());
 for (final String name : names) {
  final PropertyDescriptor descriptor = nameMap.get(name);
  if (canStreamProperty(descriptor)) {
   result.add(descriptor);
  }
 }
 return result;
}

private List<PropertyDescriptor> getSerializableProperties(Object object) {
 Map<String, PropertyDescriptor> nameMap = propertyNameCache.getUnchecked(object.getClass());
 Set<String> names = (propertyNameComparator == null) ? nameMap.keySet() :
  ImmutableSortedSet.orderedBy(propertyNameComparator).addAll(nameMap.keySet()).build();
 List<PropertyDescriptor> result = Lists.newArrayListWithCapacity(nameMap.size());
 for (final String name : names) {
  final PropertyDescriptor descriptor = nameMap.get(name);
  if (canStreamProperty(descriptor)) {
   result.add(descriptor);
  }
 }
 return result;
}

private PropertyDescriptor getProperty(String name, Class<?> type) {
 return getNameMap(type).get(name);
}

public Object unmarshal(final HierarchicalStreamReader reader,
  final UnmarshallingContext context) {
 final Object result = instantiateNewInstance(context);
 while (reader.hasMoreChildren()) {
  reader.moveDown();
  String propertyName = mapper.realMember(result.getClass(), reader
    .getNodeName());
  boolean propertyExistsInClass = beanProvider.propertyDefinedInClass(
    propertyName, result.getClass());
  if (propertyExistsInClass) {
   Class<?> type = determineType(reader, result, propertyName);
   Object value = context.convertAnother(result, type);
   beanProvider.writeProperty(result, propertyName, value);
  } else if (mapper.shouldSerializeMember(result.getClass(), propertyName)) {
   throw new ConversionException("Property '" + propertyName
     + "' not defined in class " + result.getClass().getName());
  }
  reader.moveUp();
 }
 return result;
}

private Object instantiateNewInstance(UnmarshallingContext context) {
 Object result = context.currentObject();
 if (result == null) {
  result = beanProvider.newInstance(context.getRequiredType());
 }
 return result;
}

 private Class<?> determineType(HierarchicalStreamReader reader,
   Object result, String fieldName) {
  final String classAttributeName = mapper.attributeForAlias("class");
  String classAttribute = reader.getAttribute(classAttributeName);
  if (classAttribute != null) {
   return mapper.realClass(classAttribute);
  } else {
   return mapper.defaultImplementationOf(beanProvider.getPropertyType(
     result, fieldName));
  }
 }
}

public void visitSerializableProperties(Object object, Visitor visitor) {
 for (PropertyDescriptor property : getSerializableProperties(object)) {
  try {
   Method readMethod = property.getReadMethod();
   String name = property.getName();
   Class<?> definedIn = readMethod.getDeclaringClass();
   if (visitor.shouldVisit(name, definedIn)) {
    Object value = readMethod.invoke(object);
    visitor.visit(name, property.getPropertyType(), definedIn, value);
   }
  } catch (IllegalArgumentException e) {
   throw new ObjectAccessException("Could not get property "
     + object.getClass() + '.' + property.getName(), e);
  } catch (IllegalAccessException e) {
   throw new ObjectAccessException("Could not get property "
     + object.getClass() + '.' + property.getName(), e);
  } catch (InvocationTargetException e) {
   throw new ObjectAccessException("Could not get property "
     + object.getClass() + '.' + property.getName(), e);
  }
 }
}

private List<PropertyDescriptor> getSerializableProperties(Object object) {
 Map<String, PropertyDescriptor> nameMap = getNameMap(object.getClass());
 Set<String> names = (propertyNameComparator == null) ? nameMap.keySet() :
  ImmutableSortedSet.orderedBy(propertyNameComparator).addAll(nameMap.keySet()).build();
 List<PropertyDescriptor> result = Lists.newArrayListWithCapacity(nameMap.size());
 for (final String name : names) {
  final PropertyDescriptor descriptor = nameMap.get(name);
  if (canStreamProperty(descriptor)) {
   result.add(descriptor);
  }
 }
 return result;
}

private List<PropertyDescriptor> getSerializableProperties(Object object) {
 Map<String, PropertyDescriptor> nameMap = propertyNameCache.getUnchecked(object.getClass());
 Set<String> names = (propertyNameComparator == null) ? nameMap.keySet() :
  ImmutableSortedSet.orderedBy(propertyNameComparator).addAll(nameMap.keySet()).build();
 List<PropertyDescriptor> result = Lists.newArrayListWithCapacity(nameMap.size());
 for (final String name : names) {
  final PropertyDescriptor descriptor = nameMap.get(name);
  if (canStreamProperty(descriptor)) {
   result.add(descriptor);
  }
 }
 return result;
}

private PropertyDescriptor getProperty(String name, Class<?> type) {
 return getNameMap(type).get(name);
}

public boolean propertyDefinedInClass(String name, Class<?> type) {
 return getProperty(name, type) != null;
}

public Object unmarshal(final HierarchicalStreamReader reader,
  final UnmarshallingContext context) {
 final Object result = instantiateNewInstance(context);
 while (reader.hasMoreChildren()) {
  reader.moveDown();
  String propertyName = mapper.realMember(result.getClass(), reader
    .getNodeName());
  boolean propertyExistsInClass = beanProvider.propertyDefinedInClass(
    propertyName, result.getClass());
  if (propertyExistsInClass) {
   Class<?> type = determineType(reader, result, propertyName);
   Object value = context.convertAnother(result, type);
   beanProvider.writeProperty(result, propertyName, value);
  } else if (mapper.shouldSerializeMember(result.getClass(), propertyName)) {
   throw new ConversionException("Property '" + propertyName
     + "' not defined in class " + result.getClass().getName());
  }
  reader.moveUp();
 }
 return result;
}

private Object instantiateNewInstance(UnmarshallingContext context) {
 Object result = context.currentObject();
 if (result == null) {
  result = beanProvider.newInstance(context.getRequiredType());
 }
 return result;
}