wzw.text.Formatter.java Source code

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Here is the source code for wzw.text.Formatter.java

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/**
 * Copyright (C) 2002-2005 WUZEWEN. All rights reserved.
 * WUZEWEN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package wzw.text;

import java.math.BigDecimal;
import java.math.BigInteger;
import java.text.DecimalFormat;
import java.text.Format;
import java.text.NumberFormat;
import java.util.HashMap;
import java.util.Locale;

import javax.servlet.jsp.JspException;

import org.apache.commons.lang.StringUtils;
import org.apache.log4j.Logger;

/**
 * <p>?</p>
 * 
 * <pre>
 * fmt.formatObject( new Double("12345678"),"##,##0.##")      =12,345,678
 * fmt.formatObject( new Double("12345678"),"##,##0.00")      =12,345,678.00
 * fmt.formatObject( new Double("12345678"),"##,##0.0#")       =12,345,678.0
 * fmt.formatObject( new Double("12345678"),"##0.000")         =12345678.000
 * </pre>
 * @author   WUZEWEN on 2005-09-15
 * @version   1.0
 * @see      Object#equals(java.lang.Object)
 * @see      Object#hashCode()
 * @see      HashMap
 * @since   JDK5
 **/

public class Formatter {

    /**
     * ?
     */
    protected static Logger log = Logger.getLogger(wzw.text.Formatter.class);

    /**
     * Format value according to specified format string (as tag attribute or
     * as string from message resources) or to current user locale.
     *
     * When a format string is retrieved from the message resources,
     * <code>applyLocalizedPattern</code> is used. For more about localized
     * patterns, see
     * <http://www.dei.unipd.it/corsi/fi2ae-docs/source/jdk1.1.7/src/java/text/resources/>.
     * (To obtain the correct value for some characters, you may need to view
     * the file in a hex editor and then use the Unicode escape form in the
     * property resources file.)
     *
     * @param valueToFormat value to process and convert to String
     * @exception JspException if a JSP exception has occurred
     */
    public static String formatObject(Object valueToFormat) throws JspException {
        //String formatString="";
        return formatObject(valueToFormat, null);
    }

    public static String formatObject(Object valueToFormat, String formatString) throws JspException {

        //Locale locale = Locale.getDefault();//TagUtils.getInstance().getUserLocale(pageContext, null);//this.localeKey
        return formatObject(Locale.getDefault(), valueToFormat, formatString);
    }

    /**
     * ?
     * @param locale 
     * @param valueToFormat ??
     * @param formatString ??
     * @return ??
     * @throws JspException
     */
    public static String formatObject(Locale locale, Object valueToFormat, String formatString)
            throws JspException {
        if (valueToFormat == null || valueToFormat.toString().trim().equals("")) {
            return "";
        }

        Format format = null;
        Object value = null;
        if (value instanceof String) { //??String
            value = Double.valueOf((String) valueToFormat);
        } else {
            value = valueToFormat;
        }

        boolean formatStrFromResources = true;
        //Locale locale=Locale.getDefault();

        try {
            //     if (value instanceof java.lang.String) {
            //     return (String) value;
            //     } else {

            // Prepare format object for numeric values.
            if (value instanceof Number || value instanceof String) {

                if (formatString == null) {
                    if ((value instanceof Byte) || (value instanceof Short) || (value instanceof Integer)
                            || (value instanceof Long) || (value instanceof BigInteger)) {

                        formatString = "######";

                    } else if ((value instanceof Float) || (value instanceof Double)
                            || (value instanceof BigDecimal)) {

                        formatString = "######.00";
                    }

                    if (formatString != null) {
                        formatStrFromResources = true;
                    }
                }

                if (formatString != null) {
                    try {

                        format = NumberFormat.getNumberInstance(locale);
                        if (formatStrFromResources) {
                            ((DecimalFormat) format).applyLocalizedPattern(formatString);
                        } else {
                            ((DecimalFormat) format).applyPattern(formatString);
                        }

                    } catch (IllegalArgumentException e) {
                        JspException ex = new JspException("write.format " + formatString);
                        //TagUtils.getInstance().saveException(pageContext, ex);
                        throw ex;
                    }
                }

            } else if (value instanceof java.util.Date) {

                /*   if (formatString == null) {
                     
                 if (value instanceof java.sql.Timestamp) {
                 formatString =
                 retrieveFormatString(SQL_TIMESTAMP_FORMAT_KEY);
                     
                 } else if (value instanceof java.sql.Date) {
                 formatString = retrieveFormatString(SQL_DATE_FORMAT_KEY);
                     
                 } else if (value instanceof java.sql.Time) {
                 formatString = retrieveFormatString(SQL_TIME_FORMAT_KEY);
                     
                 } else if (value instanceof java.util.Date) {
                 formatString = retrieveFormatString(DATE_FORMAT_KEY);
                 }
                     
                 }
                     
                 if (formatString != null) {
                 format = new SimpleDateFormat(formatString, locale);
                 }*/
            }

            if (format != null) {
                return format.format(value);
            } else {
                return value.toString();
            }

        } catch (JspException e) {

            log.info("The format value is:[" + value.toString() + "]");
            log.debug("debug", e);
            /// e.pri ntStackTrace();
            throw e;
        }

    }

    /**
     * @param args
     * @throws JspException 
     */
    public static void main(String[] args) throws Exception {

        /// Formatter fmt = new Formatter();

        System.out.println(
                StringUtils.rightPad("fmt.formatObject( new Double(\"12345678\"),\"##,##0.##\") ", 60, " ") + "="
                        + Formatter.formatObject(new Double("12345678"), "##,##0.##"));

        System.out.println(
                StringUtils.rightPad("fmt.formatObject( new Double(\"12345678\"),\"##,##0.00\") ", 60, " ") + "="
                        + Formatter.formatObject(new Double("12345678"), "##,##0.00"));

        System.out.println(
                StringUtils.rightPad("fmt.formatObject( new Double(\"12345678\"),\"$##,##0.0#\") ", 60, " ") + "="
                        + Formatter.formatObject(new Double("12345678"), "$##,##0.0#"));

        System.out.println(StringUtils.rightPad("fmt.formatObject( new Double(\"12345678\"),\"##0.000\") ", 60, " ")
                + "=" + Formatter.formatObject(new Double("12345678"), "##0.000"));

        //System.out.println( StringUtils.rightPad("fmt.formatObject.add(1.2, 1.32) ", 35," ")
        //                            + "=" + fmt.formatObject( ("12345678"),"##0.000") );

    }

}