/*
 * 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 samples.servlet;

import java.io.IOException;
import java.util.Optional;

import javax.inject.Inject;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.jsp.functional.Context;
import static org.apache.jsp.functional.Fragment.evaluate;
import static org.apache.jsp.functional.Fragment.write;
import samples.basic.CoreTagLibrary;
import samples.jsp.ContextImpl;

/**
 * Version of JSP page code where multiple fragments represent the page and the implementation
 * invokes them with the context. This form may make it possible to insert scriptlet blocks
 * containing raw Java code between fragment invocations.
 */
public class MultipleFragmentsAcceptContext extends HttpServlet {


    private final CoreTagLibrary core;


    @Inject
    public MultipleFragmentsAcceptContext(CoreTagLibrary core) {
        this.core = core;
    }

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        try (Context context = new ContextImpl(this, req, resp)) {
            write("Hello World").accept(context);
            evaluate("${x}").accept(context);
            core.out(Optional.of("Value param"), Optional.empty()).accept(context);
            write("Goodbye World").accept(context);
        }
    }
}