/**
* Copyright (C) 2012 - 101loops.com <dev@101loops.com>
*
* 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 com.crashnote.servlet.config;
import com.crashnote.core.config.ConfigLoader;
import com.crashnote.external.config.Config;
import com.crashnote.logger.config.LoggerConfigFactory;
import com.crashnote.web.config.WebConfigFactory;
import javax.servlet.FilterConfig;
import java.util.Enumeration;
import java.util.Properties;
public class ServletConfigFactory<C extends ServletConfig>
extends WebConfigFactory<C> {
// VARS =======================================================================================
private final FilterConfig filterConfig;
// SETUP ======================================================================================
public ServletConfigFactory(final FilterConfig filterConfig) {
this(filterConfig, new ConfigLoader());
}
public ServletConfigFactory(final FilterConfig filterConfig, final ConfigLoader loader) {
super(loader);
this.filterConfig = filterConfig;
}
// SHARED =====================================================================================
@Override
public C create() {
@SuppressWarnings("unchecked")
final C result = (C) new ServletConfig(readConf());
return result;
}
/**
* add additional configuration to initialization chain
*/
@Override
protected Config readCustomFileConf() {
// extract properties of servlet configuration (from web.xml)
final Properties props = new Properties();
if (filterConfig != null) {
final Enumeration<?> params = filterConfig.getInitParameterNames();
if (params != null) {
while (params.hasMoreElements()) {
final String name = (String) params.nextElement();
final String value = filterConfig.getInitParameter(name);
props.setProperty("crashnote." + name, value);
}
}
}
return
loader.fromProps(props, "servlet filter") // #1 filter props
.withFallback(super.readCustomFileConf()); // #2 other custom props
}
}