/*
* #%L
* ACS AEM Commons Bundle
* %%
* Copyright (C) 2014 Adobe
* %%
* 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.
* #L%
*/
package com.adobe.acs.commons.wcm.impl;
import java.io.IOException;
import java.io.StringWriter;
import java.util.Iterator;
import javax.jcr.Node;
import javax.jcr.RepositoryException;
import javax.servlet.ServletException;
import org.apache.sling.api.SlingHttpServletResponse;
import org.apache.sling.api.resource.Resource;
import org.apache.sling.api.resource.ResourceResolver;
import org.apache.sling.api.resource.ValueMap;
import org.apache.sling.api.servlets.SlingSafeMethodsServlet;
import org.apache.sling.commons.json.JSONException;
import org.apache.sling.commons.json.JSONObject;
import org.apache.sling.commons.json.jcr.JsonItemWriter;
public abstract class AbstractWidgetConfigurationServlet extends SlingSafeMethodsServlet {
protected boolean matches(String componentPath, Resource resource) {
ValueMap map = resource.adaptTo(ValueMap.class);
if (map == null) {
return false;
}
String pattern = map.get("pattern", String.class);
if (pattern == null) {
return false;
}
return componentPath.matches(pattern);
}
protected JSONObject toJSONObject(Resource resource) throws JSONException, ServletException {
JSONObject config = null;
Node node = resource.adaptTo(Node.class);
if (node != null) {
JsonItemWriter writer = new JsonItemWriter(null);
StringWriter string = new StringWriter();
try {
writer.dump(node, string, -1);
} catch (RepositoryException e) {
throw new ServletException(e);
}
config = new JSONObject(string.toString());
}
return config;
}
protected void writeEmptyWidget(String propertyName, SlingHttpServletResponse response) throws IOException,
JSONException {
JSONObject rte = createEmptyWidget(propertyName);
rte.write(response.getWriter());
}
/**
* Load the base configuration and "underlay" it under the provided
* configuration so that the provided configuration overwrites the default
* configuration.
*
* @param config the configuration to underlay
* @param resource the resource to underlay
* @return the underlayed configuration
* @throws JSONException
* @throws ServletException
*/
protected final JSONObject underlay(JSONObject config, Resource resource)
throws JSONException, ServletException {
JSONObject baseStructure = toJSONObject(resource);
if (baseStructure != null) {
Iterator<String> keys = config.keys();
while (keys.hasNext()) {
String key = keys.next();
baseStructure.put(key, config.get(key));
}
return baseStructure;
} else {
return config;
}
}
protected abstract JSONObject createEmptyWidget(String propertyName) throws JSONException;
}