/**
 * Copyright (c) 2009 Juwi MacMillan Group GmbH
 *
 * 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 de.juwimm.cms.util;

import java.io.BufferedInputStream;
import java.net.URL;

import org.apache.log4j.Logger;
import org.tizzit.util.XercesHelper;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;

import de.juwimm.cms.http.HttpClientWrapper;

/**
 * <p>Title: juwimm cms</p>
 * <p>Description: content management system</p>
 * <p>Copyright: Copyright (c) 2002</p>
 * <p>Company: juwi macmillan group gmbh</p>
 * @author <a href="mailto:kulawik@juwimm.com">Sascha Kulawik</a>
 * @version $Id$
 */

public class ConfigReader {
	private static Logger log = Logger.getLogger(ConfigReader.class);
	public static final String CONF_NODE_DCF = "//config/dcf/";
	public static final String CONF_NODE_DEFAULT = "//config/default/";
	public static final String CONF_NODE_SKIN = "//config/skin/";
	private Document confdoc = null;
	private String relativeNodePath = "//config";

	protected ConfigReader() {
	}

	/**
	 * @param confNode
	 */
	public ConfigReader(String confNode) {
		try {
			URL url = ConfigReader.class.getResource("/config.xml");
			StringBuffer buildpage = new StringBuffer();
			int c;
			try {
				BufferedInputStream page = new BufferedInputStream(url.openStream());
				while ((c = page.read()) != -1) {
					buildpage.append((char) c);
				}
			} catch (Exception exe) {
				log.error("Initialization error", exe);
			}
			String configfile = buildpage.toString();
			this.setConfdoc(XercesHelper.string2Dom(configfile));
			this.setRelativeNodePath(confNode);
		} catch (Exception exe) {
			log.error("Initialization error", exe);
		}
	}

	public ConfigReader(URL urlConfFile, String confNode) {
		try {
			String configfile = HttpClientWrapper.getInstance().getString(urlConfFile);
			this.setConfdoc(XercesHelper.string2Dom(configfile));
		} catch (Exception exe) {
			log.error("Initialization error", exe);
		}
	}

	public ConfigReader(String configfile, String confNode) {
		try {
			this.setConfdoc(XercesHelper.string2Dom(configfile));
			this.setRelativeNodePath(confNode);
		} catch (Exception exe) {
		}
	}

	public NodeList getConfigSubelements(String strNode) {
		NodeList nl = null;
		try {
			nl = XercesHelper.findNode(this.getConfdoc().getFirstChild(), this.getRelativeNodePath() + strNode).getChildNodes();
		} catch (Exception exe) {
		}
		return nl;
	}

	public String getConfigAttribute(String strNode, String strAttrName) {
		String retVal = "";
		try {
			Element elm = (Element) XercesHelper.findNode(this.getConfdoc().getFirstChild(), this.getRelativeNodePath() + strNode);
			retVal = elm.getAttribute(strAttrName);
		} catch (Exception exe) {
		}
		return retVal;
	}

	public String getConfigNodeValue(String strNode) {
		String retVal = "";
		try {
			retVal = XercesHelper.getNodeValue(this.getConfdoc().getFirstChild(), this.getRelativeNodePath() + strNode);
		} catch (Exception exe) {
		}
		return retVal;
	}

	public String getConfigNodeValueWithNull(String strNode) {
		String retVal = null;
		try {
			Element nde = (Element) XercesHelper.findNode(this.getConfdoc().getFirstChild(), this.getRelativeNodePath() + strNode);
			retVal = nde.getFirstChild().getNodeValue();
		} catch (Exception exe) {
			log.info("Parameter loading error", exe);
		}
		return retVal;
	}

	/**
	 * @param confdoc The confdoc to set.
	 */
	protected void setConfdoc(Document confdoc) {
		this.confdoc = confdoc;
	}

	/**
	 * @return Returns the confdoc.
	 */
	protected Document getConfdoc() {
		return confdoc;
	}

	/**
	 * @param relativeNodePath The relativeNodePath to set.
	 */
	protected void setRelativeNodePath(String relativeNodePath) {
		this.relativeNodePath = relativeNodePath;
	}

	/**
	 * @return Returns the relativeNodePath.
	 */
	protected String getRelativeNodePath() {
		return relativeNodePath;
	}

}