/*
 * Copyright 2004-2009 the Seasar Foundation and the Others.
 *
 * 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.seasar.mayaa.impl.cycle.web;

import org.seasar.mayaa.FactoryFactory;
import org.seasar.mayaa.cycle.Response;
import org.seasar.mayaa.cycle.scope.ApplicationScope;
import org.seasar.mayaa.cycle.scope.RequestScope;
import org.seasar.mayaa.cycle.scope.SessionScope;
import org.seasar.mayaa.impl.cycle.AbstractServiceCycle;
import org.seasar.mayaa.impl.engine.EngineUtil;
import org.seasar.mayaa.impl.engine.PageForwarded;
import org.seasar.mayaa.impl.engine.RenderingTerminated;
import org.seasar.mayaa.impl.util.StringUtil;

/**
 * @author Masataka Kurihara (Gluegent, Inc.)
 */
public class ServiceCycleImpl extends AbstractServiceCycle {

    private static final long serialVersionUID = 5971443264903384152L;

    private ApplicationScope _application;
    private RequestScopeImpl _request;
    private ResponseImpl _response;
    private SessionScopeImpl _session;

    public ServiceCycleImpl() {
        _request = new RequestScopeImpl();
    }

    public ApplicationScope getApplicationScope() {
        if (_application == null) {
            _application = FactoryFactory.getApplicationScope();
        }
        return _application;
    }

    public RequestScope getRequestScope() {
        return _request;
    }

    public SessionScope getSessionScope() {
        if (_session == null) {
            _session = new SessionScopeImpl();
            Object underlying = _request.getUnderlyingContext();
            _session.setUnderlyingContext(underlying);
        }
        return _session;
    }

    public Response getResponse() {
        if (_response == null) {
            _response = new ResponseImpl();
        }
        return _response;
    }

    public void forward(String forwardPath) {
        if (StringUtil.isRelativePath(forwardPath)) {
            String sourcePath = EngineUtil.getSourcePath();
            forwardPath = StringUtil.adjustRelativePath(sourcePath, forwardPath);
        }

        _request.setForwardPath(forwardPath);
        _response.clearBuffer();
        throw new PageForwarded();
    }

    public void redirect(String url) {
        if (_response.isFlushed() == false) {
            if (StringUtil.isRelativePath(url)) {
                String sourcePath = EngineUtil.getSourcePath();
                url = StringUtil.adjustRelativePath(
                        _request.getContextPath() + sourcePath, url);
            }

            _response.clearBuffer();
            _response.redirect(url);
            _response.flush();
            throw new RenderingTerminated();
        }
    }

    public void error(int errorCode) {
        error(errorCode, null);
    }

    public void error(int errorCode, String message) {
        if (_response.isFlushed() == false) {
            _response.clearBuffer();
            _response.error(errorCode, message);
            _response.flush();
            throw new RenderingTerminated();
        }
    }

    public void throwJava(Throwable t) throws Throwable {
        if (t != null) {
            throw t;
        }
    }

}
