Generate an iterator for a iterable source.
NOTE: JSP-TAG
Generate an iterator based on the val attribute supplied.
NOTE: The generated iterator will ALWAYS be pushed into the top of the stack, and poped at the end of the tag.Generate a simple iterator <ww:generator val="%{'aaa,bbb,ccc,ddd,eee'}"> <ww:iterator> <ww:property /><br/> </ww:iterator> </ww:generator>This generates an iterator and print it out using the iterator tag. Example Two:
Generate an iterator with count attribute <ww:generator val="%{'aaa,bbb,ccc,ddd,eee'}" count="3"> <ww:iterator> <ww:property /><br/> </ww:iterator> </ww:generator>This generates an iterator, but only 3 entries will be available in the iterator generated, namely aaa, bbb and ccc respectively because count attribute is set to 3 Example Three:
Generate an iterator with id attribute <ww:generator val="%{'aaa,bbb,ccc,ddd,eee'}" count="4" separator="," id="myAtt" /> <% Iterator i = (Iterator) pageContext.getAttribute("myAtt"); while(i.hasNext()) { String s = (String) i.next(); %> <%=s%> <br/> <% } %>This generates an iterator and put it in the PageContext under the key as specified by the id attribute. Example Four:
Generate an iterator with comparator attribute <ww:generator val="%{'aaa,bbb,ccc,ddd,eee'}" converter="%{myConverter}"> <ww:iterator> <ww:property /><br/> </ww:iterator> </ww:generator> public class GeneratorTagAction extends ActionSupport { .... public Converter getMyConverter() { return new Converter() { public Object convert(String value) throws Exception { return "converter-"+value; } }; } ... }This will generate an iterator with each entries decided by the converter supplied. With this converter, it simply add "converter-" to each entries.
Name |
Required |
Default |
Type |
Description |
---|---|---|---|---|
count | false | Integer | the max number entries to be in the iterator | |
separator | true | String | the separator to be used in separating the val into entries of the iterator | |
val | true | Object/String | the source to be parsed into an iterator | |
converter | false | com.opensymphony.webwork.util.IteratorGenerator.Converter | the converter to convert the String entry parsed from val into an object | |
id | false | String | the id to store the resultant iterator into page context, if such id is supplied |