com.ejlchina.searcher.implement.convertor.DefaultFieldConvertor Maven / Gradle / Ivy
package com.ejlchina.searcher.implement.convertor;
import java.math.BigDecimal;
import java.math.BigInteger;
import com.ejlchina.searcher.SearcherException;
/**
* 默认数据库字段值转换器
*
* @author Troy.Zhou @ 2017-04-07
*
*/
public class DefaultFieldConvertor implements FieldConvertor {
@Override
public Object convert(Object value, Class fieldType) {
if (value == null) {
return value;
}
Class clazz = value.getClass();
// 有继承关系
if (fieldType.isAssignableFrom(clazz)) {
return value;
}
String strValue = value.toString();
try {
if (fieldType == int.class || fieldType == Integer.class) {
return Integer.valueOf(strValue);
}
if (fieldType == long.class || fieldType == Long.class) {
return Long.valueOf(strValue);
}
if (fieldType == float.class || fieldType == Float.class) {
return Float.valueOf(strValue);
}
if (fieldType == double.class || fieldType == Double.class) {
return Double.valueOf(strValue);
}
} catch (Exception e) {
throw new SearcherException("不能把【" + value.getClass() + "】转换为【" + fieldType + "】类型！", e);
}
if (fieldType == boolean.class || fieldType == Boolean.class) {
strValue = strValue.toUpperCase();
if ("0".equals(strValue) || "FALSE".equals(strValue) || "N".equals(strValue) || "F".equals(strValue)
|| "NO".equals(strValue)) {
return Boolean.FALSE;
}
if ("1".equals(strValue) || "TRUE".equals(strValue) || "Y".equals(strValue) || "T".equals(strValue)
|| "YES".equals(strValue)) {
return Boolean.TRUE;
}
throw new SearcherException("不能把【" + value.getClass() + "】转换为boolean值！");
}
if (fieldType == BigDecimal.class) {
return new BigDecimal(strValue);
}
if (fieldType == BigInteger.class) {
return new BigInteger(strValue);
}
throw new SearcherException("不能把【" + value.getClass() + "】转换为【" + fieldType + "】类型！");
}
}