// Copyright 2005-2007 onetsoft.com
//
// 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 com.onetsoft.fastjsp;

import com.onetsoft.fastjsp.valid.ValidationException;


class ComponentsManager {

    private Class[] componentClasses = null;
    private AbstractComponent[] components = null;

    public ComponentsManager(Class[] componentClasses) {
        this.componentClasses = componentClasses;
    }

    /**
     * 按組件類取得組件
     *
     * @param clazz
     * @return
     */
    Component getComponent(Class clazz) {
        for (int i = 0; i < components.length; i++) {
            if (components[i].getClass() == clazz)
                return components[i];
        }
        throw new ApplicationRuntimeException("ComponentsManager:Cannot find component by class:" + clazz.getName());
    }

    void instanceComponents(AbstractPageCycle cycle) {
        try {
            components = new AbstractComponent[componentClasses.length];
            for (int i = 0; i < componentClasses.length; i++) {
                components[i] = (AbstractComponent) componentClasses[i].newInstance();
                components[i].setCycle(cycle);
                if (i == 0)
                    cycle.service.page = (AbstractPage) components[0];
                components[i].uci = i;
            }
            for (int i = 0; i < components.length; i++)
                try {
                    components[i].init();
                } catch (ApplicationRuntimeException e) {
                    if (e.getCause() instanceof ValidationException) {
                        cycle.service.delegateCombo.addDelegate(((ValidationException) e.getCause()).getDelegate());
                    } else
                        throw e;
                }
        } catch (InstantiationException e) {
            throw new ApplicationRuntimeException(e);
        } catch (IllegalAccessException e) {
            throw new ApplicationRuntimeException(e);
        }
    }

    /**
     * 頁面或組件顯示前初始化表單域數據
     *
     * @param cycle
     * @since 3.1
     */
    void initComponentsFields(AbstractPageCycle cycle) {
        for (int i = 0; i < components.length; i++) {
            components[i].initFields(cycle.service.data);
        }
    }

}