/*******************************************************************************
 * Copyright 2012 The MITRE Corporation
 * 
 * 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.mitre.swd.view;

import java.io.Writer;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.validation.BeanPropertyBindingResult;
import org.springframework.web.servlet.view.AbstractView;

import com.google.gson.ExclusionStrategy;
import com.google.gson.FieldAttributes;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;

public class JsonOpenIdConfigurationView extends AbstractView {

	@Override
	protected void renderMergedOutputModel(Map<String, Object> model, HttpServletRequest request, HttpServletResponse response) throws Exception {
		Gson gson = new GsonBuilder().setExclusionStrategies(new ExclusionStrategy() {

			@Override
			public boolean shouldSkipField(FieldAttributes f) {
				return false;
			}

			@Override
			public boolean shouldSkipClass(Class<?> clazz) {
				// skip the JPA binding wrapper
				if (clazz.equals(BeanPropertyBindingResult.class)) {
					return true;
				} else {
					return false;
				}
			}

		})
		.create();

		response.setContentType("application/json");

		Writer out = response.getWriter();

		Object obj = model.get("entity");
		if (obj == null) {
			obj = model;
		}

		gson.toJson(obj, out);
		

	}

}
