com.tieuluan.struts2.utils.AppSetting.java Source code

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Here is the source code for com.tieuluan.struts2.utils.AppSetting.java

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/**
 * Copyright 2011 Viettel Telecom. All rights reserved.
 * VIETTEL PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
package com.tieuluan.struts2.utils;

import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Hashtable;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.TransformerException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import com.sun.org.apache.xpath.internal.XPathAPI;

/**
 * Lop load len cai cau hinh cua chuong trinh
 * 
 * @author: thanhtc
 * @version: 1.0
 * @since: 1.0
 */
public class AppSetting {

    /** The log. */
    private static Log log = LogFactory.getLog(AppSetting.class);

    /** The Constant CONFIG_NAME. */
    private static final String CONFIG_NAME = "app-settings.xml";

    /** The params. */
    private static Hashtable<String, String> params;
    static {
        try {
            ClassLoader loader = AppSetting.class.getClassLoader();
            InputStream configStream = loader.getResourceAsStream(CONFIG_NAME);
            //         final InputStream configStream = new FileInputStream(CONFIG_NAME);
            buildConfig(configStream);
        } catch (Exception ex) {
            System.out.println(ex.getMessage());
            ex.printStackTrace();
            params = new Hashtable<String, String>();
        }
    }

    /**
     * Instantiates a new app setting.
     */
    public AppSetting() {
    }

    /**
     * Gets the string value.
     * 
     * @param name
     *            the name
     * @return the string value
     */
    public static String getStringValue(String name) {
        return params.get(name);
    }

    /**
     * Gets the boolean value.
     * 
     * @param name
     *            the name
     * @return the boolean value
     */
    public static boolean getBooleanValue(String name) {
        String val = getStringValue(name);
        return "true".equalsIgnoreCase(val) || "yes".equalsIgnoreCase(val);
    }

    /**
     * Gets the integer value.
     * 
     * @param name
     *            the name
     * @return the integer value
     */
    public static int getIntegerValue(String name) {
        String val = getStringValue(name);
        return Integer.parseInt(val);
    }

    /**
     * Gets the double value.
     * 
     * @param name
     *            the name
     * @return the double value
     */
    public static double getDoubleValue(String name) {
        String val = getStringValue(name);
        return Double.parseDouble(val);
    }

    /**
     * Gets the date value.
     * 
     * @param name
     *            the name
     * @return the date value
     */
    public static Date getDateValue(String name) {
        String val = getStringValue(name);
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date date;
        try {
            date = format.parse(val);
        } catch (Exception ex) {
            date = null;
        }
        return date;
    }

    /**
     * Builds the config.
     * 
     * @param configStream
     *            the config stream
     * @throws Exception
     *             the exception
     */
    private static void buildConfig(InputStream configStream) throws Exception {
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        DocumentBuilder builder = factory.newDocumentBuilder();
        Document document = builder.parse(configStream);
        params = new Hashtable<String, String>();
        NodeList paramNodeList = XPathAPI.selectNodeList(document, "/configuration/app-setting/param");
        for (int i = 0; i < paramNodeList.getLength(); i++) {
            Node paramNode = paramNodeList.item(i);
            String name = getNodeValue(paramNode, "./@name");
            String value = getNodeValue(paramNode, "./@value");
            params.put(name, value);
        }
    }

    /**
     * Gets the node value.
     * 
     * @param contextNode
     *            the context node
     * @param xpath
     *            the xpath
     * @return the node value
     */
    private static String getNodeValue(Node contextNode, String xpath) {
        String val = null;
        try {
            Node node = XPathAPI.selectSingleNode(contextNode, xpath);
            val = node.getNodeValue();
        } catch (TransformerException ex) {
            val = null;
        }
        log.toString();
        return val;
    }

    /**
      * Gets the long value.
      * 
      * @param name
      *            the name
      * @return the integer value
      */
    public static long getLongValue(String name) {
        String val = getStringValue(name);
        return Long.parseLong(val);
    }
}