/*
 * Copyright 2005 the original author or authors.
 * 
 * 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.wamblee.crawler.impl;

import java.util.List;

import org.wamblee.crawler.Configuration;
import org.wamblee.crawler.PageRequest;
import org.wamblee.crawler.PageType;

/**
 * Implementation of the configuration for the crawler.
 */
public class ConfigurationImpl implements Configuration {

    private List<UrlConfig> _urlConfig;

    private List<PageTypeConfig> _pageTypeConfig;

    /**
     * Constructs the configuration. 
     * @param aUrlConfig List of URL configuration elements. 
     * @param aPageTypeConfig List of page type configuration elements. 
     */
    public ConfigurationImpl(List<UrlConfig> aUrlConfig,
            List<PageTypeConfig> aPageTypeConfig) {
        _urlConfig = aUrlConfig;
        _pageTypeConfig = aPageTypeConfig;
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.wamblee.crawler.Configuration#getRequest(java.lang.String)
     */
    public PageRequest getRequest(String aUrl) {

        for (UrlConfig config : _urlConfig) {
            PageRequest request = config.getRequest(aUrl);
            if (request != null) {
                return request;
            }
        }
        throw new RuntimeException("No configuration matched the URL '" + aUrl
                + "'");
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.wamblee.crawler.Configuration#getRequest(org.wamblee.crawler.PageType)
     */
    public PageRequest getRequest(PageType aType) {
        for (PageTypeConfig config : _pageTypeConfig) {
            PageRequest request = config.getRequest(aType.getType());
            if (request != null) {
                return request;
            }
        }
        throw new RuntimeException("No configuration matched type '" + aType
                + "'");
    }
}