Dynamic attributes in custom tag

Question

Hi,
I am new to JSP, and i want to build a custom tag. in this custom tag i have declared for example 5 attributes. i want to have a custom tag that when i set the attribute1 content to "true", only attribute2 and attribute3 would be accessible and if i set the attribute1 content to "false", only attribute4 and attribute5 would be accessible
<%@taglib uri="/WEB-INF/MyTLD2.tld" prefix="myTag" %>
<myTag:DB attribute1 ="true" attribute2="Table1" attribute3="ID,Name,Tel" />
<myTag:DB attribute1 ="false" attribute4="Table1" attribute5=" UpdateTable" />

Answer 1

Or you could go for a more general definition of what the attributes mean. Instead of having 5 attributes that the user only needs 3 of, you could do something like:
<myTag:DB sourceType="string" table="Table1" data="ID,Name,Tel"/>
<myTag:DB sourceType="table" table="Table1" data="UpdateTable"/>
(use just three attributes, all required, but with different expected values for the second or third attribute based on what the first one is).
Then have your tag do:
        if ("string".equals(sourceType)) runStringSourceQuery(table, data);
        if ("table".equals(sourceType)) runTableSourceQuery(table, data);Either way, good documentation is needed to make sure what is needed under what circumstances.