org.impalaframework.web.config.ContextPathAwareSystemPropertySource Maven / Gradle / Ivy
/*
* Copyright 2007-2010 the original author or authors.
*
* 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.impalaframework.web.config;
import javax.servlet.ServletContext;
import org.impalaframework.config.PropertySource;
import org.impalaframework.web.utils.ServletContextUtils;
import org.springframework.util.Assert;
/**
* Implementation of {@link PropertySource} which will attempt to look for properties
* prefixed using the context path, as determined using {@link ServletContext#getContextPath()}
* @author Phil Zoio
*/
public class ContextPathAwareSystemPropertySource implements PropertySource {
private final ServletContext servletContext;
public ContextPathAwareSystemPropertySource(ServletContext servletContext) {
super();
Assert.notNull(servletContext, "servletContext cannot be null");
this.servletContext = servletContext;
}
/**
* If current version of {@link ServletContext} is 2.5 or greater,
* attempts to retrieve property with '%contextPath%.name', with %contextPath% resolved using
* {@link ServletContext#getContextPath()}. Otherwise returns null,
*/
public String getValue(String name) {
final boolean supportsContextPath = ServletContextUtils.isAtLeast25(servletContext);
if (supportsContextPath) {
String contextPath = ServletContextUtils.getContextPathWithoutSlash(servletContext);
return System.getProperty(contextPath + "." + name);
}
return null;
}
}