Tag libraries are unable to process at submission time as it simply
goes from form -> server. You could use JavaScript and trap the
onsubmit event, but that's about it.
Matt
On 3/13/08, Kanchana <[EMAIL PROTECTED]> wrote:
>
> Hi All
>
> I'm trying out with a new approach of validating the form submission using
> a tag library.I went through the code base and found out that appfuse.tld is
> the centralized custom tag library which has defined some tag libraries
> such as FormatDate in it.So Far all these validations are limited to the
> view but not involving the form submission process. I wonder how we can
> write a custom lag library which can use in the form validation in the
> submition level.When I debuged the Formatdate tag library class when the
> form is load .It calls only when the page is load but not at time after we
> submit it.I wonder a approach of writing tag library/reference API to handle
> the tag libraries after submitting the form.Any idea will be greatly
> appreciated.
> Thanks
> Kanchana
>
>
>
>
> Kanchana wrote:
> >
> > Hi All
> >
> > I'm hitting my head against to the wall to do a filed length validation
> > using a custom tag library in appfuse 2 .I saw many of the default tld
> > are defined in the WEB-INF/appfuse.tld and those are simulated in view jsp
> > using taglib.jsp.So accordingly i also tried adding a new tag lib class in
> > the web/src/java/taglib and have the tag defined in the appfuse.tld.i
> > packaged the project and deployed assuming the rest of the configurations
> > are done automatically and I called the tag lib in the jsp using
> > followings
> >
> > <%@ include file="/common/taglibs.jsp"%> and ad follows
> >
> > TravelLocation is a model classes which as a travelLocationId and name as
> > properties and my tag lib name is nullValuesTag which i defined in the
> > appfuse.tld.But unfortunately i don't see the validation is happening and
> > I don't see the out put.I did the validation for the length of the travel
> > location name property which defined as 20 characters in the DB.Can any
> > one please help me to figure out how to write custom validation in appfuse
> > whether my approach is correct.
> >
> > FYI: in the taglib.jsp i have pass the key values of nullValuesTag.length
> > to applicationRescources.properties files.I'm not sure how this properties
> > file is read at run time and i hoped to see the message when the
> > validation is correctly done
> >
> > Thanks and regards
> > Kanchana
> >
> >
> > code piece from the jsp to call the tag lib
> > ----------------------------------------------
> >
> > <spring:bind path="travelLocation.travelLocationId">
> > <input type="hidden" name="id" value="<c:out value="${status.value}"/>"/>
> > </spring:bind>
> > <div class="content_table">
> > <p>
> > <div class="form_table_column1" >
> >
> > <appfuse:label styleClass="desc" key="travlLocation.name"/>
> > </div>
> > <div class="form_table_column2">
> >
> >
> > <spring:bind path="travelLocation.name">
> >
> > <appfuse:nullValuesTag value="<%=request.getParameter("name")%>"
> > key="">
> > </appfuse:nullValuesTag>
> >
> > <input class="TextField" type="text" name="name" id="name"
> > value="<c:out value="${status.value}"/>" />
> > </spring:bind>
> > </div>
> > </p>
> >
> >
> > Appfuse.tld code piece.
> >
> ----------------------------------------------------------------------------------
> > <tag>
> >
> > <name>nullValuesTag</name>
> >
> > <tagclass>lk.mazarin.lgs.webapp.taglib.NullValuesTag</tagclass>
> >
> > <bodycontent>JSP</bodycontent>
> >
> > <info>tests zip code</info>
> >
> >
> >
> > <attribute>
> >
> > <name>value</name>
> >
> > <required>true</required>
> >
> > <rtexprvalue>true</rtexprvalue>
> >
> > </attribute>
> >
> >
> >
> > <attribute>
> >
> > <name>length</name>
> >
> > <required>false</required>
> >
> > <rtexprvalue>true</rtexprvalue>
> >
> > </attribute>
> >
> > </tag>
> > =======================================
> > NullValuesTag.java
> >
> > package lk.mazarin.lgs.webapp.taglib;
> >
> > import java.io.IOException;
> > import java.util.Date;
> > import javax.servlet.http.HttpServletRequest;
> > import javax.servlet.jsp.JspException;
> > import lk.mazarin.lgs.util.DateUtil;
> >
> >
> > import org.springframework.web.servlet.support.RequestContext;
> >
> > /**
> > * <p>This class is designed to render a formatted date tag in the format
> > * the user's locale has speficied.</p>
> > *
> > * <p>It is designed to be used as follows:
> > * <pre><tag:date value="comman.datefield" /></pre>
> > * </p>
> > *
> > * @jsp.tag name="date" bodycontent="empty"
> > */
> >
> > public class NullValuesTag extends TemplateTag {
> > private String value;
> > private int length;
> >
> > public NullValuesTag() {
> > value = null;
> > length = 1;
> > }
> >
> > public int doStartTag() throws JspException {
> >
> > if (value == null)
> > return 1; //check if we have zip code
> > if (value.equals(null))
> > return 1; //check if value is not null
> >
> > if (value.length()> 20) {
> > //has to be an integer! short case of zip code xxxxx
> > try {
> > Integer.parseInt(value);
> > return 0;
> > } catch (NumberFormatException e) {
> > return 1;
> > }
> > }
> >
> > /*else if (value.length() == 10) {
> > // long case on Zip code xxxxx-xxxx
> > String part1 = value.substring(0, 5);
> > String dash = value.substring(5, 6);
> > String part2 = value.substring(6);
> > if (!dash.equals("-"))
> > return 1;
> > try {
> > Integer.parseInt(part1);
> > Integer.parseInt(part2);
> > return 0;
> > } catch (NumberFormatException e) {
> > return 1;
> > }
> > }*/
> > return 1;
> > }
> >
> > public int getLength() {
> > return length;
> > }
> >
> > public String getValue() {
> > return value;
> > }
> >
> > public void release() {
> > value = null;
> > length = 1;
> > }
> >
> > public void setLength(int i) {
> > length = i;
> > }
> >
> > public void setValue(String s) {
> > value = s;
> > }
> > }
> >
> >
>
> --
>
> View this message in context:
> http://www.nabble.com/Writing-custom-tag-libraries-in-appfuse-2-tp15872546s2369p16022292.html
>
> Sent from the AppFuse - User mailing list archive at Nabble.com.
>
>
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