servlet/src/main/java/org/jclouds/ohai/servlet/suppliers/ServletContextSupplier.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.jclouds.ohai.servlet.suppliers;

import javax.inject.Inject;
import javax.inject.Singleton;
import javax.servlet.ServletContext;

import org.jclouds.domain.JsonBall;

import com.google.common.base.Supplier;

/**
 * 
 * @author Adrian Cole
 */
@Singleton
public abstract class ServletContextSupplier implements Supplier<JsonBall> {
	private final ServletContext servletContext;

	@Inject
	public ServletContextSupplier(ServletContext servletContext) {
		this.servletContext = servletContext;
	}

	@Override
	public JsonBall get() {
		String path = servletContext.getContextPath();
		if (path == null || path.equals(""))
			path = "/";
		return new JsonBall(String.format("{\"%s\":%s}", path,
				provideJson(servletContext)));
	}

	protected abstract String provideJson(ServletContext servletContext);
}