Hi All,
Application which i am developing has number of get and set method in bean class, so just would like to know in the class where i am fetching data (basically extracted from an xml which is present in DB as blob) should i call these get and set metod depending on the corresponding fields explicitly or is there any way that java detects on the fieldname and does a get/set automatically.
Thanks in advance
Did you try "XPath"?
Try searching articles about "XPath" ...
However, if you have to make your class in a JavaBeans fashion, I think you cannot reduce the getters and setters to one method. It is because JavaBeans currently does not support
"<ValueType> getXXX(String)" and "setXXX(String, <ValueType>)"
where the String argument is used to pass the name of the XML tag you want. The current JavaBeans spec only supports:
"<ValueType> getXXX(int)" and "setXXX(int, <ValueType>)"
which is called "Indexed Properties". One way you can do this is to "digitalize" the XML tags. For example, if you have 3 XML tags <first_name>, <last_name> and <address>, you can create 3 static constants like this:
public static final int TAG_FIRST_NAME = 0;
public static final int TAG_LAST_NAME = 1;
public static final int TAG_ADDRESS = 2;
Besides, create a map to map these numbers to the XML tag names:
public static final Map<Integer, String> MAP_XML_TAGS = createXMLTagsMap();
private static Map<Integer, String> createXMLTagsMap() {
Map<Integer, String> map = new HashMap<Integer, String>();
map.put(0, "first_name");
map.put(1, "last_name");
map.put(2, "address");
return map;
}
Then, you may call the "reduced getter" by getXMLTagValue(TAG_FIRST_NAME). The method could be inplemented like this:
public String getXMLTagValue(int index) {
String XMLTagName = MAP_XML_TAGS.get(index);
String value = null;
// Use XPath to get the value of the tag
return value;
}
However, personally, I don't think this is a good design pattern ....
I think this destroys the original philosophy behind JavaBeans.
Asuka Kenji (UserID = 289)
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