package org.sakaiproject.util;
import java.math.BigDecimal;
import java.sql.Date;
import java.sql.Time;
import java.sql.Timestamp;
import java.text.DateFormat;
import java.text.NumberFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Locale;
/**
* 类型转换辅助工具类<br>
*
*/
public class TypeCaseHelper {
/**
* 转换核心实现方法
*
* @param obj
* @param type
* @param format
* @return Object
* @throws TypeCastException
*/
public static Object convert(Object obj, String type, String format) throws TypeCastException {
Locale locale = new Locale("zh", "CN", "");
if (obj == null)
return null;
if (obj.getClass().getName().equals(type))
return obj;
if ("Object".equals(type) || "java.lang.Object".equals(type))
return obj;
String fromType = null;
if (obj instanceof String) {
fromType = "String";
String str = (String) obj;
if ("String".equals(type) || "java.lang.String".equals(type))
return obj;
if (str.length() == 0)
return null;
if ("Boolean".equals(type) || "java.lang.Boolean".equals(type)) {
Boolean value = null;
if (str.equalsIgnoreCase("TRUE"))
value = new Boolean(true);
else
value = new Boolean(false);
return value;
}
if ("Double".equals(type) || "java.lang.Double".equals(type))
try {
Number tempNum = getNf(locale).parse(str);
return new Double(tempNum.doubleValue());
} catch (ParseException e) {
throw new TypeCastException("Could not convert " + str + " to " + type + ": ", e);
}
if ("BigDecimal".equals(type) || "java.math.BigDecimal".equals(type))
try {
BigDecimal retBig = new BigDecimal(str);
int iscale = str.indexOf(".");
int keylen = str.length();
if (iscale > -1) {
iscale = keylen - (iscale + 1);
return retBig.setScale(iscale, 5);
} else {
return retBig.setScale(0, 5);
}
} catch (Exception e) {
throw new TypeCastException("Could not convert " + str + " to " + type + ": ", e);
}
if ("Float".equals(type) || "java.lang.Float".equals(type))
try {
Number tempNum = getNf(locale).parse(str);
return new Float(tempNum.floatValue());
} catch (ParseException e) {
throw new TypeCastException("Could not convert " + str + " to " + type + ": ", e);
}
if ("Long".equals(type) || "java.lang.Long".equals(type))
try {
NumberFormat nf = getNf(locale);
nf.setMaximumFractionDigits(0);
Number tempNum = nf.parse(str);
return new Long(tempNum.longValue());
} catch (ParseException e) {
throw new TypeCastException("Could not convert " + str + " to " + type + ": ", e);
}
if ("Integer".equals(type) || "java.lang.Integer".equals(type))
try {
NumberFormat nf = getNf(locale);
nf.setMaximumFractionDigits(0);
Number tempNum = nf.parse(str);
return new Integer(tempNum.intValue());
} catch (ParseException e) {
throw new TypeCastException("Could not convert " + str + " to " + type + ": ", e);
}
if ("Date".equals(type) || "java.sql.Date".equals(type)) {
if (format == null || format.length() == 0)
try {
return Date.valueOf(str);
} catch (Exception e) {
try {
DateFormat df = null;
if (locale != null)
df = DateFormat.getDateInstance(3, locale);
else
df = DateFormat.getDateInstance(3);
java.util.Date fieldDate = df.parse(str);
return new Date(fieldDate.getTime());
} catch (ParseException e1) {
throw new TypeCastException("Could not convert " + str + " to " + type + ": ", e);
}
}
try {
SimpleDateFormat sdf = new SimpleDateFormat(format);
java.util.Date fieldDate = sdf.parse(str);
return new Date(fieldDate.getTime());
} catch (ParseException e) {
throw new TypeCastException("Could not convert " + str + " to " + type + ": ", e);
}
}
if ("Timestamp".equals(type) || "java.sql.Timestamp".equals(type)) {
if (str.length() == 10)
str = str + " 00:00:00";
if (format == null || format.length() == 0)
try {
return Timestamp.valueOf(str);
} catch (Exception e) {
try {
DateFormat df = null;
if (locale != null)
df = DateFormat.getDateTimeInstance(3, 3, locale);
else
df = DateFormat.getDateTimeInstance(3, 3);
java.util.Date fieldDate = df.parse(str);
return new Timestamp(fieldDate.getTime());
} catch (ParseException e1) {
throw new TypeCastException("Could not convert " + str + " to " + type + ": ", e);
}
}
try {
SimpleDateFormat sdf = new SimpleDateFormat(format);
java.util.Date fieldDate = sdf.parse(str);
return new Timestamp(fieldDate.getTime());
} catch (ParseException e) {
throw new TypeCastException("Could not convert " + str + " to " + type + ": ", e);
}
} else {
throw new TypeCastException("Conversion from " + fromType + " to " + type + " not currently supported");
}
}
if (obj instanceof BigDecimal) {
fromType = "BigDecimal";
BigDecimal bigD = (BigDecimal) obj;
if ("String".equals(type))
return getNf(locale).format(bigD.doubleValue());
if ("BigDecimal".equals(type) || "java.math.BigDecimal".equals(type))
return obj;
if ("Double".equals(type))
return new Double(bigD.doubleValue());
if ("Float".equals(type))
return new Float(bigD.floatValue());
if ("Long".equals(type))
return new Long(Math.round(bigD.doubleValue()));
if ("Integer".equals(type))
return new Integer((int) Math.round(bigD.doubleValue()));
else
throw new TypeCastException("Conversion from " + fromType + " to " + type + " not currently supported");
}
if (obj instanceof Double) {
fromType = "Double";
Double dbl = (Double) obj;
if ("String".equals(type) || "java.lang.String".equals(type))
return getNf(locale).format(dbl.doubleValue());
if ("Double".equals(type) || "java.lang.Double".equals(type))
return obj;
if ("Float".equals(type) || "java.lang.Float".equals(type))
return new Float(dbl.floatValue());
if ("Long".equals(type) || "java.lang.Long".equals(type))
return new Long(Math.round(dbl.doubleValue()));
if ("Integer".equals(type) || "java.lang.Integer".equals(type))
return new Integer((int) Math.round(dbl.doubleValue()));
if ("BigDecimal".equals(type) || "java.math.BigDecimal".equals(type))
return new BigDecimal(dbl.toString());
else
throw new TypeCastException("Conversion from " + fromType + " to " + type + " not currently supported");
}
if (obj instanceof Float) {
fromType = "Float";
Float flt = (Float) obj;
if ("String".equals(type))
return getNf(locale).format(flt.doubleValue());
if ("BigDecimal".equals(type) || "java.math.BigDecimal".equals(type))
return new BigDecimal(flt.doubleValue());
if ("Double".equals(type))
return new Double(flt.doubleValue());
if ("Float".equals(type))
return obj;
if ("Long".equals(type))
return new Long(Math.round(flt.doubleValue()));
if ("Integer".equals(type))
return new Integer((int) Math.round(flt.doubleValue()));
else
throw new TypeCastException("Conversion from " + fromType + " to " + type + " not currently supported");
}
if (obj instanceof Long) {
fromType = "Long";
Long lng = (Long) obj;
if ("String".equals(type) || "java.lang.String".equals(type))
return getNf(locale).format(lng.longValue());
if ("Double".equals(type) || "java.lang.Double".equals(type))
return new Double(lng.doubleValue());
if ("Float".equals(type) || "java.lang.Float".equals(type))
return new Float(lng.floatValue());
if ("BigDecimal".equals(type) || "java.math.BigDecimal".equals(type))
return new BigDecimal(lng.toString());
if ("Long".equals(type) || "java.lang.Long".equals(type))
return obj;
if ("Integer".equals(type) || "java.lang.Integer".equals(type))
return new Integer(lng.intValue());
else
throw new TypeCastException("Conversion from " + fromType + " to " + type + " not currently supported");
}
if (obj instanceof Integer) {
fromType = "Integer";
Integer intgr = (Integer) obj;
if ("String".equals(type) || "java.lang.String".equals(type))
return getNf(locale).format(intgr.longValue());
if ("Double".equals(type) || "java.lang.Double".equals(type))
return new Double(intgr.doubleValue());
if ("Float".equals(type) || "java.lang.Float".equals(type))
return new Float(intgr.floatValue());
if ("BigDecimal".equals(type) || "java.math.BigDecimal".equals(type)) {
String str = intgr.toString();
BigDecimal retBig = new BigDecimal(intgr.doubleValue());
int iscale = str.indexOf(".");
int keylen = str.length();
if (iscale > -1) {
iscale = keylen - (iscale + 1);
return retBig.setScale(iscale, 5);
} else {
return retBig.setScale(0, 5);
}
}
if ("Long".equals(type) || "java.lang.Long".equals(type))
return new Long(intgr.longValue());
if ("Integer".equals(type) || "java.lang.Integer".equals(type))
return obj;
else
throw new TypeCastException("Conversion from " + fromType + " to " + type + " not currently supported");
}
if (obj instanceof Date) {
fromType = "Date";
Date dte = (Date) obj;
if ("String".equals(type) || "java.lang.String".equals(type))
if (format == null || format.length() == 0) {
return dte.toString();
} else {
SimpleDateFormat sdf = new SimpleDateFormat(format);
return sdf.format(new java.util.Date(dte.getTime()));
}
if ("Date".equals(type) || "java.sql.Date".equals(type))
return obj;
if ("Time".equals(type) || "java.sql.Time".equals(type))
throw new TypeCastException("Conversion from " + fromType + " to " + type + " not currently supported");
if ("Timestamp".equals(type) || "java.sql.Timestamp".equals(type))
return new Timestamp(dte.getTime());
else
throw new TypeCastException("Conversion from " + fromType + " to " + type + " not currently supported");
}
if (obj instanceof Timestamp) {
fromType = "Timestamp";
Timestamp tme = (Timestamp) obj;
if ("String".equals(type) || "java.lang.String".equals(type))
if (format == null || format.length() == 0) {
return (new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")).format(tme).toString();
} else {
SimpleDateFormat sdf = new SimpleDateFormat(format);
return sdf.format(new java.util.Date(tme.getTime()));
}
if ("Date".equals(type) || "java.sql.Date".equals(type))
return new Date(tme.getTime());
if ("Time".equals(type) || "java.sql.Time".equals(type))
return new Time(tme.getTime());
if ("Timestamp".equals(type) || "java.sql.Timestamp".equals(type))
return obj;
else
throw new TypeCastException("Conversion from " + fromType + " to " + type + " not currently supported");
}
if (obj instanceof Boolean) {
fromType = "Boolean";
Boolean bol = (Boolean) obj;
if ("Boolean".equals(type) || "java.lang.Boolean".equals(type))
return bol;
if ("String".equals(type) || "java.lang.String".equals(type))
return bol.toString();
if ("Integer".equals(type) || "java.lang.Integer".equals(type)) {
if (bol.booleanValue())
return new Integer(1);
else
return new Integer(0);
} else {
throw new TypeCastException("Conversion from " + fromType + " to " + type + " not currently supported");
}
}
if ("String".equals(type) || "java.lang.String".equals(type))
return obj.toString();
else
throw new TypeCastException("Conversion from " + obj.getClass().getName() + " to " + type + " not currently supported");
}
private static NumberFormat getNf(Locale locale) {
NumberFormat nf = null;
if (locale == null)
nf = NumberFormat.getNumberInstance();
else
nf = NumberFormat.getNumberInstance(locale);
nf.setGroupingUsed(false);
return nf;
}
public static Boolean convert2SBoolean(Object obj) throws TypeCastException {
return (Boolean) convert(obj, "Boolean", null);
}
public static Integer convert2Integer(Object obj) throws TypeCastException {
return (Integer) convert(obj, "Integer", null);
}
public static String convert2String(Object obj) throws TypeCastException {
return (String) convert(obj, "String", null);
}
public static String convert2String(Object obj, String defaultValue) throws TypeCastException {
Object s = convert(obj, "String", null);
if (s != null)
return (String) s;
else
return "";
}
public static Long convert2Long(Object obj) throws TypeCastException {
return (Long) convert(obj, "Long", null);
}
public static Double convert2Double(Object obj) throws TypeCastException {
return (Double) convert(obj, "Double", null);
}
public static BigDecimal convert2BigDecimal(Object obj, int scale) throws TypeCastException {
return ((BigDecimal) convert(obj, "BigDecimal", null)).setScale(scale, 5);
}
public static Date convert2SqlDate(Object obj, String format) throws TypeCastException {
return (Date) convert(obj, "Date", format);
}
public static Timestamp convert2Timestamp(Object obj, String format) throws TypeCastException {
return (Timestamp) convert(obj, "Timestamp", format);
}
}
