Custom tag with rendered attribute

Is it possible to create a custom tag that operates similar to a JSF tag with the rendered attribute? Wrapping output with c:if test="..." is not as nice as the JSF rendered option, but I don't want to use JSF for this particular project.
Edited by: black_lotus on Nov 23, 2007 12:13 PM

TLD File, per your previous recommendation:
<attribute>
     <name>disabled</name>
     <required>false</required>
     <rtexprvalue>true</rtexprvalue>
     <type>boolean</type>
</attribute>My Tag class (snippet):
public class ButtonTag extends TagSupport
  private boolean disabled;
  public ButtonTag() {}
  public boolean isDisabled()
     return disabled;
  public void setDisabled(boolean b)
    disabled = b;
}A sample of the jsp file invoking it:
<c:set var="result" value="${computedValue}"/>
<ltm:button disabled="${result}"/>Regardless of the value of result, ("true" or "false") it always passes false to the setDisabled method of the button tag class.

Similar Messages

  • Custom Tag with boolean Attribute problems

    Hi,
    I've created a simple custom tag that is expecting a boolean attribute called "disabled". In my Tag derived class I've created a setDisabled(boolean b) method and set the following in the tag descriptor:
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  • Taglib problem: Cannot parse custom tag with short name table

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    [/code]

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    </web-app>
    but if I use the version 2.3 because I want filters,context listeners and so on:
    <?xml version = '1.0' encoding = 'windows-1252'?>
    <!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/j2ee/dtds/web-app_2_3.dtd">
    <web-app>
    <description>Empty web.xml file for Web Application</description>
    <filter>
    <filter-name>FilterRedirector</filter-name>
    <filter-class>org.apache.cactus.server.FilterTestRedirector</filter-class>
    </filter>
    <!-- Filter Redirector URL mapping -->
    <filter-mapping>
    <filter-name>FilterRedirector</filter-name>
    <url-pattern>/FilterRedirector/</url-pattern>
    </filter-mapping>
    <session-config>
    <session-timeout>30</session-timeout>
    </session-config>
    <mime-mapping>
    <extension>html</extension>
    <mime-type>text/html</mime-type>
    </mime-mapping>
    <mime-mapping>
    <extension>txt</extension>
    <mime-type>text/plain</mime-type>
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    <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>index.html</welcome-file>
    </welcome-file-list>
    </web-app>
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    If I remove the filter secion all

  • Tomcat 4.1.12 and custom tags with body

    Hi,
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    jp.co.nttdata.sk._webtier.tagext.FormTag jspxth_sk_form_0 = (jp.co.nttdata.sk._webtier.tagext.FormTag) jspxtagPool_sk_form_action.get(jp.co.nttdata.sk._webtier.tagext.FormTag.class);
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    jspxth_sk_form_0.setParent(null);
    jspxth_sk_form_0.setAction(SKScreenDefinition.SK_I0100 );
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    if (_jspx_eval_sk_form_0 != javax.servlet.jsp.tagext.Tag.EVAL_BODY_INCLUDE) {
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    _bc.clear();
    out = _bc;
    jspxth_sk_form_0.setBodyContent(_bc);
    jspxth_sk_form_0.doInitBody();
    do {
    out.write("\r\n<input type=\"hidden\" name=\"rpt_no\" value=\"<%= rpt_no %>\">\r\n<input type=\"hidden\" name=\"optnOpen\" value=\"0\">\r\n<table border=0 cellspacing=0 cellpadding=0 class=\"bdsyl\">\r\n<tr>\r\n<td class=\"innframe\">\r\n\r\n\t<table border=0 cellspacing=0 cellpadding=5 class=\"bgcol_1\">\r\n\t<tr>\r\n\t<td class=\"fsyl_1\"><font class=\"fsyl_6\">���</font> ������������E/td>\r\n\t<td>\r\n\t\t\t<select name=\"rptDivCombo\">\r\n<%\r\n\tstrSelected = \"\";\r\n\tnLen = 0;\r\n\tif(arrOskCodeNameRptDiv != null) nLen = arrOskCodeNameRptDiv.length;\r\n%>\r\n<%\r\n\tfor(int i=0;i<nLen;i++) \r\n\t{\r\n\t\tString cd = arrOskCodeNameRptDiv.getCode();\r\n\t\tString nm = arrOskCodeNameRptDiv[i].getName();\r\n\t\tString value = cd + SKConstants.SEPARATOR + nm;\r\n\r\n\t\tstrSelected = \"\";\r\n\t\tif(cd.equals(rpt_div)) strSelected = \"selected\";\r\n%>\r\n\t\t\t\t<option <%= strSelected %> value=\"<%=value%>\"><%= nm%></option>\r\n<%\r\n\t}//for loop\r\n%>\r\n\t\t\t</select>\r\n\t</td>\r\n\t</tr>\r\n\t<tr>\r\n\t<td class=\"fsyl_1\"><font class=\"fsyl_6\">���</font> ��� ���E���</td>\r\n\t<td>\r\n\t\r\n\t\t\t<select name=\"prortyCombo\">\r\n<%\r\n\tstrSelected = \"\";\r\n\tnLen = 0;\r\n\tif(arrOskCodeNameProrty != null) nLen = arrOskCodeNameProrty.length;\r\n");
    out.write("%>\r\n<%\r\n\tfor(int i=0;i<nLen;i++) \r\n\t{\r\n\t\tString cd = arrOskCodeNameProrty[i].getCode();\r\n\t\tString nm = arrOskCodeNameProrty[i].getName();\r\n\t\tString value = cd + SKConstants.SEPARATOR + nm;\r\n\r\n\t\tstrSelected = \"\";\r\n\t\tif(cd.equals(prorty)) strSelected = \"selected\";\r\n%>\r\n\t\t\t\t<option <%= strSelected %> value=\"<%= value %>\"><%= nm %></option>\r\n<%\r\n\t}//for loop\r\n%>\r\n\t\t\t</select>\r\n\t\r\n\t</td>\r\n\t</tr>\r\n\t<tr>\r\n\t<td class=\"fsyl_1\"><font class=\"fsyl_6\">���</font> ������������E/td>\r\n\t<td><input type=\"text\" size=4 maxlength=4 name=\"rpt_dt_yyyy\" value=\"<%= rpt_dt_yyyy %>\">��� <input type=\"text\" size=2 maxlength=2 name=\"rpt_dt_mm\" value=\"<%= rpt_dt_mm %>\">���E<input type=\"text\" size=2 name=\"rpt_dt_dd\" maxlength=2 value=\"<%= rpt_dt_dd %>\">��� <input type=\"text\" maxlength=2 size=2 name=\"rpt_dt_hh\" value=\"<%= rpt_dt_hh %>\">���E<input type=\"text\" size=2 maxlength=2 name=\"rpt_dt_mi\" value=\"<%= rpt_dt_mi %>\">���E<span class=\"fsyl_2\">�E����������������E/span></td>\r\n\t</tr>\r\n\t<tr>\r\n\t<td class=\"fsyl_1\"><font class=\"fsyl_6\">���</font> ��� ���E���E</td>\r\n\t<td><input type=\"text\" size=20 name=\"rpt_user\" value=\"<%= Util.forHidden(rpt_user) %>\"></td>\r\n");
    out.write("\t</tr>\r\n\t<tr>\r\n\t<td class=\"fsyl_1\"><font class=\"fsyl_6\">���</font> ���������������E/td>\r\n\t<td>\r\n\t\r\n\t\t\t<select name=\"rptRegiUserCombo\">\r\n<%\r\n\tstrSelected = \"\";\r\n\tnLen = 0;\r\n\tif(arrOfUserName != null) nLen = arrOfUserName.length;\r\n\r\n\tfor(int i=0;i<nLen;i++){\r\n\t\tString[] arrTemp = UzUtil.extractTokens(arrOfUserName[i], SKConstants.SEPARATOR);\r\n\t\t\r\n\t\tstrSelected = \"\";\r\n\t\tif(arrTemp[0].equals(rpt_regi_user)) strSelected = \"selected\";\r\n%>\r\n\t\t\t\t<option <%= strSelected %> value=\"<%= arrOfUserName[i] %>\"><%= arrTemp[1] %></option>\r\n<%\r\n\t}//for loop\r\n%>\r\n\t\t\t</select>\r\n\r\n\t\r\n\t</td>\r\n\t</tr>\r\n\t<tr>\r\n\t<td class=\"fsyl_1\"><font class=\"fsyl_6\">���</font> ������������������</td>\r\n\t<td><input type=\"text\" size=70 name=\"rpt_title\" value=\"<%= UzString.forHidden(rpt_title)%>\"> <span class=\"fsyl_2\">�E�E00���E�����E/span></td>\r\n\t</tr>\r\n\t<tr>\r\n\t<td valign=top class=\"fsyl_1\"><font class=\"fsyl_6\">���</font> ��������E���</td>\r\n\t<td nowrap><textarea wrap=\"physical\" rows=10 cols=72 name=\"rpt_txt\"><%= UzString.htmlEncodeForHidden(rpt_txt) %></textarea> <span class=\"fsyl_2\">�E�E000���E�����E/span>      </td>\r\n");
    out.write("\t</tr>\r\n\t<tr>\r\n\t<td valign=top class=\"fsyl_1\"><font class=\"fsyl_6\">���</font> ���������E��</td>\r\n\t<td><textarea rows=5 cols=72 name=\"rpt_effct_lmt\"><%= UzString.htmlEncodeForHidden(rpt_effct_lmt) %></textarea> <span class=\"fsyl_2\">�E�E00���E�����E/span></td>\r\n\t</tr>\r\n\t<tr>\r\n\t<td valign=top class=\"fsyl_1\"><font class=\"fsyl_6\">���</font> ���E��� ���</td>\r\n\t<td><textarea rows=5 cols=72 name=\"reappr_cnd\"><%= UzString.htmlEncodeForHidden(reappr_cnd)%></textarea> <span class=\"fsyl_2\">�E�E00���E�����E/span></td>\r\n\t</tr>\r\n\t<tr>\r\n\t<td nowrap class=\"fsyl_1\"><font class=\"fsyl_6\">���</font> ������������������E/td>\r\n\t<td><input type=\"text\" size=4 name=\"rply_prf_dt_yyyy\" maxlength=4 value=\"<%= rply_prf_dt_yyyy %>\">��� <input type=\"text\" size=2 name=\"rply_prf_dt_mm\" maxlength=2 value=\"<%= rply_prf_dt_mm %>\">���E<input type=\"text\" maxlength=2 size=2 name=\"rply_prf_dt_dd\" value=\"<%= rply_prf_dt_dd %>\">��� <input type=\"text\" maxlength=2 size=2 name=\"rply_prf_dt_hh\" value=\"<%= rply_prf_dt_hh %>\">���E<input type=\"text\" maxlength=2 size=2 name=\"rply_prf_dt_mi\" value=\"<%= rply_prf_dt_mi %>\">���E<span class=\"fsyl_2\">�E����������������E/span></td>\r\n");
    out.write("\t</tr>\r\n\t<tr>\r\n\t<td>���</td>\r\n\t<td align=right><input type=\"button\" value=\"���������������\" onClick=\"openOptn()\"></td>\r\n\t</tr>\r\n<!---- ��������������������������������������� ----->\r\n\t<tr id=\"com\" style=\"display:none\">\r\n\t<td colspan=2>\r\n\t\t<table border=0 cellspacing=0 cellpadding=5>\r\n\t\t<tr>\r\n\t\t<td class=\"fsyl_1\"><font class=\"fsyl_6\">���</font> ���������������E/td>\r\n\t\t<td>\r\n\t\t\t<select name=\"crrspndUserCombo\">\r\n<%\r\n\tstrSelected = \"\";\r\n\tnLen = 0;\r\n\tif(arrOfUserName != null) nLen = arrOfUserName.length;\r\n\r\n\tif(crrspnd_user.equals(\"\")) strSelected = \"selected\";\r\n%>\r\n\t\t\t\t<option <%= strSelected %> value=\"<%= SKConstants.NOTSPECIFIED %>\">���������������������E/option>\r\n<%\r\n\tfor(int i=0;i<nLen;i++){\r\n\t\tString[] arrTemp = UzUtil.extractTokens(arrOfUserName[i], SKConstants.SEPARATOR);\r\n\t\t\r\n\t\tstrSelected = \"\";\r\n\t\tif(arrTemp[0].equals(crrspnd_user)) strSelected = \"selected\";\r\n%>\r\n\t\t\t\t<option <%= strSelected %> value=\"<%= arrOfUserName[i] %>\"><%= arrTemp[1] %></option>\r\n<%\r\n\t}//for loop\r\n%>\r\n\t\t\t</select>\r\n\t\t\r\n\t\t</td>\r\n\t\t</tr>\r\n\t\t<tr>\r\n\t\t<td class=\"fsyl_1\"><font class=\"fsyl_6\">���</font> ������������������E/td>\r\n");
    out.write("\t\t<td>\r\n\t\t\t<select name=\"fndngDivCombo\">\r\n<%\r\n\tstrSelected = \"\";\r\n\tnLen = 0;\r\n\tif(arrOskCodeNameFndngDiv != null) nLen = arrOskCodeNameFndngDiv.length;\r\n\r\n\tif(fndng_div.equals(\"\")) strSelected = \"selected\";\r\n%>\r\n\t\t\t\t<option <%= strSelected %> value=\"<%= SKConstants.NOTSPECIFIED %>\">���������������������E/option>\r\n<%\r\n\tfor(int i=0;i<nLen;i++) \r\n\t{\r\n\t\tString cd = arrOskCodeNameFndngDiv[i].getCode();\r\n\t\tString nm = arrOskCodeNameFndngDiv[i].getName();\r\n\t\tString value = cd + SKConstants.SEPARATOR + nm;\r\n\r\n\t\tstrSelected = \"\";\r\n\t\tif(cd.equals(fndng_div)) strSelected = \"selected\";\r\n%>\r\n\t\t\t\t<option <%= strSelected %> value=\"<%= value %>\"><%= nm %></option>\r\n<%\r\n\t}//for loop\r\n%>\r\n\t\t\t</select>\r\n\t\t\r\n\t\t</td>\r\n\t\t</tr>\r\n\t\t<tr>\r\n\t\t<td class=\"fsyl_1\"><font class=\"fsyl_6\">���</font> ������������E��������</td>\r\n\t\t<td><input type=\"text\" maxlength=4 size=4 name=\"crrspnd_fin_pln_dt_yyyy\" value=\"<%= crrspnd_fin_pln_dt_yyyy %>\">��� <input type=\"text\" maxlength=2 size=2 name=\"crrspnd_fin_pln_dt_mm\" value=\"<%= crrspnd_fin_pln_dt_mm %>\">���E<input maxlength=2 type=\"text\" size=2 name=\"crrspnd_fin_pln_dt_dd\" value=\"<%= crrspnd_fin_pln_dt_dd %>\">��� <span class=\"fsyl_2\">�E����������������E/span></td>\r\n");
    out.write("\t\t</tr>\r\n\t\t<tr>\r\n\t\t<td class=\"fsyl_1\"><font class=\"fsyl_6\">���</font> ������������E��</td>\r\n\t\t<td><input type=\"text\" maxlength=4 size=4 name=\"crrspnd_fin_dt_yyyy\" value=\"<%= crrspnd_fin_dt_yyyy %>\">��� <input type=\"text\" maxlength=2 size=2 name=\"crrspnd_fin_dt_mm\" value=\"<%= crrspnd_fin_dt_mm %>\">���E<input type=\"text\" size=2 maxlength=2 name=\"crrspnd_fin_dt_dd\" value=\"<%= crrspnd_fin_dt_dd %>\">��� <span class=\"fsyl_2\">�E����������������E/span></td>\r\n\t\t</tr>\r\n\t\t<tr>\r\n\t\t<td valign=top class=\"fsyl_1\"><font class=\"fsyl_6\">���</font> ������������</td>\r\n\t\t<td><textarea rows=8 cols=72 name=\"cause_txt\"><%= UzString.htmlEncodeForHidden(cause_txt) %></textarea> <span class=\"fsyl_2\">�E�E000���E�����E/span></td>\r\n\t\t</tr>\r\n\t\t<tr>\r\n\t\t<td valign=top class=\"fsyl_1\"><font class=\"fsyl_6\">���</font> ���������E��</td>\r\n\t\t<td><textarea rows=10 cols=72 name=\"crrspnd_txt\"><%= UzString.htmlEncodeForHidden(crrspnd_txt) %></textarea> <span class=\"fsyl_2\">�E�E000���E�����E/span></td>\r\n\t\t</tr>\r\n\t\t<tr>\r\n\t\t<td valign=top class=\"fsyl_1\"><font class=\"fsyl_6\">���</font> ���������������E/td>\r\n\t\t<td><textarea rows=8 cols=72 name=\"rlps_prvnt_schm\"><%= UzString.htmlEncodeForHidden(rlps_prvnt_schm) %></textarea> <span class=\"fsyl_2\">�E�E000���E�����E/span></td>\r\n");
    out.write("\t\t</tr>\r\n\t\t</table>\r\n\t</td>\r\n\t</tr>\r\n<!---- ��������������������������������������� ���E----->\r\n\t<tr>\r\n\t<td valign=top class=\"fsyl_1\"><font class=\"fsyl_6\">���</font> ������������������E/td>\r\n\t<td>\r\n\t\t<table border=0 cellspacing=0 cellpadding=0>\r\n\t\t<tr valign=top>\r\n\t\t<td><input type=\"radio\" name=\"mail_sendto_div_radio\" checked onClick=\"mailCheck(true)\" value=\"<%= SKConstants.CD_ONE + SKConstants.SEPARATOR + \"������\" %>\">��������������� <input type=\"radio\" name=\"mail_sendto_div_radio\" onClick=\"mailCheck(false)\" value=\"<%= SKConstants.CD_ZERO + SKConstants.SEPARATOR + \"���������E��\" %>\">���������E��Enbsp; </td>\r\n\t\t<td>\r\n<%\r\n\tstrSelected = \"\";\r\n\tnLen = 0;\r\n\tif(arrOskCodeNameGroup != null) nLen = arrOskCodeNameGroup.length;\r\n\tint nExtra = (nLen/2) + (nLen%2);\r\n%>\r\n<%\r\n\tfor(int i=0;i<nLen;i++) \r\n\t{\r\n\t\tString cd = arrOskCodeNameGroup[i].getCode();\r\n\t\tString nm = arrOskCodeNameGroup[i].getName();\r\n\t\tString value = cd + SKConstants.SEPARATOR + nm;\r\n%>\r\n\t\t\t\t<input type=\"checkbox\" name=\"send_mail\" value=\"<%= value %>\"><%= nm %><br>\r\n<%\r\n\t\tif((i+1) == nExtra)\r\n\t\t{\r\n%>\r\n\t\t\t</td>\r\n\t\t\t<td>    </td>\r\n");
    out.write("\t\t\t<td>\r\n<%\r\n\t\t}\r\n\t}//for loop\r\n%>\r\n\t\t</td>\r\n\t\t</tr>\r\n\t\t</table>\r\n\t</td>\r\n\t</tr>\r\n\t<td>���</td>\r\n\t<td align=right><br><input type=\"submit\" value=\"������������\" name=\"saveReport\">���<input type=\"submit\" value=\"���������������������\" name=\"regReport\"></td>\r\n\t</tr>\r\n\t</table>\r\n\r\n</td>\r\n</tr>\r\n</table>\r\n");
    int evalDoAfterBody = jspxth_sk_form_0.doAfterBody();
    if (evalDoAfterBody != javax.servlet.jsp.tagext.BodyTag.EVAL_BODY_AGAIN)
    break;
    } while (true);
    if (_jspx_eval_sk_form_0 != javax.servlet.jsp.tagext.Tag.EVAL_BODY_INCLUDE)
    out = pageContext.popBody();
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    Regards,
    Susheel

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    Actually I was using the body content as tagdependent instead of jsp.
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