/*
 * 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.jsp;

import java.io.IOException;

import javax.servlet.Servlet;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.jsp.SkipPageException;

import org.apache.jsp.functional.AbortException;
import org.apache.jsp.functional.Context;
import org.apache.jsp.functional.Fragment;
import org.apache.jsp.functional.Page;

/**
 *
 */
public class PageImpl implements Page {

    private final Context context;
    private AbortException pageError;

    public PageImpl(Servlet servlet, HttpServletRequest req, HttpServletResponse resp) {
        this.context = new ContextImpl(servlet, req, resp);
    }

    @Override
    public void accept(Fragment fragment) {
        try {
            fragment.accept(context);
        } catch (AbortException e) {
            pageError = e;
        } catch (Throwable t) {
            pageError = new AbortException(t);
            throw pageError;
        }
    }

    @Override
    public void close() throws ServletException, IOException {
        try {
            if (pageError != null) {
                Throwable cause = pageError.getCause();
                if (!(cause instanceof SkipPageException)) {
                    context.getPageContext().handlePageException(cause);
                }
            }
        } finally {
            context.close();
        }
    }
}