Hi, my project use Castor, and I have one question.
I created a field handler named TimeHander.java like this:
public class TimeHandler extends GeneralizedFieldHandler {
private SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMdd");
public TimeHandler() {
super();
}
public void setConfiguration(Properties config) throws ValidityException {
String pattern = config.getProperty("date-format");
if (pattern == null) {
throw new ValidityException("need parameter \"date-format\"");
}
try {
formatter = new SimpleDateFormat(pattern);
} catch (IllegalArgumentException e) {
throw new ValidityException("the parameter \"" + pattern + "\"
invalid");
}
}
public Object convertUponGet(Object value) {
if (value == null) return null;
Date date = (Date) value;
return formatter.format(date);
}
public Object convertUponSet(Object value) {
Date date = null;
try {
if (StringUtils.isEmpty((String) value)) {
return date;
}
date = formatter.parse((String) value);
}
catch (ParseException px) {
throw new IllegalArgumentException(px.getMessage());
}
return date;
}
public Class getFieldType() {
return Date.class;
}
public Object newInstance(Object parent) throws IllegalStateException {
return null;
}
}
and my Java bean has two java.util.Date type fields,
to make Castor work correctly,
I have to define two <field-handler/> in mapping file like this:
...
...
<field-handler name="timeHandler1" class="TimeHandler">
<param name="date-format" value="yyyyMMdd"/>
</field-handler>
<field-handler name="timeHandler2" class="TimeHandler">
<param name="date-format" value="yyyyMMdd"/>
</field-handler>
...
...
<class name="Mybean ">
<map-to xml="MyBean"/>
<field name="time1" type="java.lang.String" handler="timeHandler1">
<bind-xml name="Time1" node="element"/>
</field>
<field name="time2" type="java.lang.String" handler="timeHandler2">
<bind-xml name="Time2" node="element"/>
</field>
</class>
....
that's mean: one field , one <field-handler/> , even the same processing
logic.
But my project has dozens of Java beans, and has dozens of Date-type fileds,
so, I have to define dozens of <field-handler/>, it is so terrible....
Is there any advices?
Regards
Joey
2011-3-9
