/*
 * Copyright 2004-2013 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.framework.container.external.portlet;

import java.util.Collections;
import java.util.Map;

import javax.portlet.PortletContext;
import javax.portlet.PortletRequest;

import org.seasar.framework.container.ExternalContext;
import org.seasar.framework.exception.EmptyRuntimeException;

/**
 * This class is ExternalContext implementation for Portlet environment.
 * 
 * @author <a href="mailto:shinsuke@yahoo.co.jp">Shinsuke Sugaya</a>
 * 
 */
public class PortletExternalContext implements ExternalContext {

    private ThreadLocal requests = new ThreadLocal();

    private ThreadLocal responses = new ThreadLocal();

    private ThreadLocal configs = new ThreadLocal();

    private PortletContext application;

    public Object getRequest() {
        return getPortletRequest();
    }

    /**
     * PortletRequestを返します。
     * 
     * @return PortletRequest
     */
    protected PortletRequest getPortletRequest() {
        return (PortletRequest) requests.get();
    }

    public void setRequest(Object request) {
        requests.set(request);
    }

    public Object getResponse() {
        return responses.get();
    }

    public void setResponse(Object response) {
        responses.set(response);
    }

    /**
     * 設定用のオブジェクトを返します。
     * 
     * @return 設定用のオブジェクト
     */
    public Object getConfig() {
        return configs.get();
    }

    /**
     * 設定用のオブジェクトを設定します。
     * 
     * @param config
     */
    public void setConfig(Object config) {
        configs.set(config);
    }

    public Object getSession() {
        PortletRequest request = getPortletRequest();
        if (request == null) {
            throw new EmptyRuntimeException("request");
        }
        return request.getPortletSession();
    }

    public Object getApplication() {
        return application;
    }

    public void setApplication(Object application) {
        if (!(application instanceof PortletContext)) {
            throw new IllegalArgumentException("application:" + application);
        }
        this.application = (PortletContext) application;
    }

    public Map getApplicationMap() {
        return new PortletApplicationMap(application);
    }

    public Map getInitParameterMap() {
        return new PortletInitParameterMap(application);
    }

    public Map getRequestCookieMap() {
        // TODO need to check if Sun Portlet API do something..
        return Collections.EMPTY_MAP;
    }

    public Map getRequestHeaderMap() {
        return new PortletRequestHeaderMap(getPortletRequest());
    }

    public Map getRequestHeaderValuesMap() {
        return new PortletRequestHeaderValuesMap(getPortletRequest());
    }

    public Map getRequestMap() {
        return new PortletRequestMap(getPortletRequest());
    }

    public Map getRequestParameterMap() {
        return new PortletRequestParameterMap(getPortletRequest());
    }

    public Map getRequestParameterValuesMap() {
        return new PortletRequestParameterValuesMap(getPortletRequest());
    }

    public Map getSessionMap() {
        return new PortletSessionMap(getPortletRequest());
    }
}