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| <a name="ErrorsTool Reference Documentation">
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| <strong>ErrorsTool Reference Documentation</strong></a></font>
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| </td>
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| <tr>
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| <td NOWRAP> </td>
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| <td>
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| <p> |
| This tool deals with Struts error messages. Errors may stem from the validation |
| of a submitted form or from the processing of a request. If there are errors, |
| they are made available to the view to render. A few important aspects about errors |
| are:</p>
|
| <ul> |
| <li>Error message strings are looked up in the message resources. Support |
| for internationalized messages is provided.</li> |
| <li>Error messages can have up to five replacement parameters.</li> |
| <li>Errors have an attribute <code>property</code> that describes the category of |
| error. This allows the view designer to place error messages precisely where an |
| error occurred. For example, errors that apply to the entire page can be rendered |
| at the top of the page, errors that apply to a specific input field can be rendered |
| next to this input field. Several methods of this tool provide a parameter |
| <code>property</code> that allows to select a specific category of errors to operate |
| on. Without the <code>property</code> parameter, methods operate on all error messages.</li> |
| </ul>
|
| <p>See the Struts User's Guide, section |
| <a href="http://struts.apache.org/struts-doc-1.2.7/userGuide/building_view.html">Building View Components</a> |
| for more information on this topic.</p>
|
| <table cellpadding="0" cellspacing="0">
|
| <tr><td colspan="2"><strong>Class</strong></td></tr>
|
| <tr><td> </td><td>org.apache.velocity.tools.struts.ErrorsTool</td></tr>
|
|
|
| <tr><td colspan="2"><strong>Name</strong></td></tr>
|
| <tr><td> </td><td>$errors (this is the recommended name of the tool in
|
| the Velocity context)</td></tr>
|
|
|
| <tr><td colspan="2"><strong>Toolbox Configuration Example</strong></td></tr>
|
| <tr><td> </td><td><pre><tool> |
| <key>errors</key> |
| <scope>request</scope> |
| <class>org.apache.velocity.tools.struts.ErrorsTool</class> |
| </tool></pre></td></tr>
|
|
|
| <tr><td colspan="2"><strong>Author(s)</strong></td></tr>
|
| <tr>
|
| <td> </td>
|
| <td><a href="mailto:sidler@teamup.com">Gabriel Sidler</a><br></td>
|
| </tr>
|
| </table>
|
| <dl>
|
| <dt><strong>Method Overview</strong></dt>
|
| <dd>
|
| <table cellpadding="2" cellspacing="2" border="0">
|
| <tr>
|
| <td bgcolor="EEEEEE" nowrap>
|
| <a href="#exist()">exist()</a></td>
|
| <td bgcolor="EEEEEE">
|
| |
| Returns <code>true</code> if there are errors queued, otherwise <code>false</code>. |
|
|
| </td>
|
| </tr>
|
| <tr>
|
| <td bgcolor="EEEEEE" nowrap>
|
| <a href="#getSize()">getSize()</a></td>
|
| <td bgcolor="EEEEEE">
|
| |
| Returns the number of error messages queued. |
|
|
| </td>
|
| </tr>
|
| <tr>
|
| <td bgcolor="EEEEEE" nowrap>
|
| <a href="#getGlobal()">getGlobal()</a></td>
|
| <td bgcolor="EEEEEE">
|
| |
| This a convenience method and the equivalent of |
| <code>$errors.get($errors.globalName)</code> |
|
|
| </td>
|
| </tr>
|
| <tr>
|
| <td bgcolor="EEEEEE" nowrap>
|
| <a href="#getAll()">getAll()</a></td>
|
| <td bgcolor="EEEEEE">
|
| |
| Returns a list of localized error messages for all errors queued. |
|
|
| </td>
|
| </tr>
|
| <tr>
|
| <td bgcolor="EEEEEE" nowrap>
|
| <a href="#get()">get()</a></td>
|
| <td bgcolor="EEEEEE">
|
| |
| Returns a list of localized error messages for a particular category |
| of errors. |
|
|
| </td>
|
| </tr>
|
| <tr>
|
| <td bgcolor="EEEEEE" nowrap>
|
| <a href="#getMsgs()">getMsgs()</a></td>
|
| <td bgcolor="EEEEEE">
|
| |
| Renders the queued errors messages. |
|
|
| </td>
|
| </tr>
|
| </table>
|
| </dd>
|
| </dl>
|
| <dl>
|
| <dt><strong>See Also</strong></dt>
|
| <dd>
|
| <see>The <a href="../javadoc/org/apache/velocity/tools/struts/ErrorsTool.html">Javadoc</a> for more info.</see>
|
| </dd>
|
| </dl>
|
|
|
| </td>
|
| </tr>
|
| </table>
|
| <table border="0" cellspacing="0" cellpadding="2" width="100%">
|
| <tr>
|
| <td colspan="2" bgcolor="#525D76">
|
| <font color="#ffffff" face="arial,helvetica.sanserif">
|
| <a name="exist()">
|
| <strong>exist()</strong></a></font>
|
| </td>
|
| </tr>
|
| <tr>
|
| <td NOWRAP> </td>
|
| <td>
|
|
|
| <p>
|
| <abstract> |
| Returns <code>true</code> if there are errors queued, otherwise <code>false</code>. |
| </abstract>
|
| </p>
|
| <p>
|
| <table width="100%"><tr><td bgcolor="EEEEEE">
|
| <font size="+1"><code>
|
| <signature> |
| boolean exist() |
| </signature>
|
| </code></font>
|
| </td></tr></table>
|
| </p>
|
| <p>
|
| <table width="100%"><tr><td bgcolor="EEEEEE">
|
| <font size="+1"><code>
|
| <signature> |
| boolean exist(String property) |
| </signature>
|
| </code></font>
|
| </td></tr></table>
|
| </p>
|
| <dl>
|
| <dt><strong>Parameters</strong></dt>
|
| <dd>
|
| <dl>
|
| <dt>property</dt>
|
| <dd>
|
| <parameter name="property"> |
| The category of errors to check for. |
| </parameter>
|
| </dd>
|
|
|
|
|
| </dl>
|
| </dd>
|
| </dl>
|
| <dl>
|
| <dt><strong>Returns</strong></dt>
|
| <dd>
|
| <returns> |
| <code>true</code> if there are error messages queued. <code>false</code> otherwise. |
| </returns>
|
| </dd>
|
| </dl>
|
|
|
| <p>Calling <code>exist()</code> without the <code>property</code> parameter checks for error messages of |
| any category. The <code>property</code> parameter can be used to limit the check to |
| error messages of a specific category.</p>
|
| <table width="100%" cellpadding="1" cellspacing="0" border="0"><tr><td bgcolor="#000000">
|
| <table width="100%" cellpadding="5" cellspacing="0" border="0"><tr><td bgcolor="#FFFFFF">
|
| <pre><sourcecode>$errors.exist() |
| $errors.exist("password") |
| </sourcecode></pre>
|
| </td></tr></table>
|
| </td></tr></table>
|
|
|
|
|
| <br clear="all">
|
|
|
| </td>
|
| </tr>
|
| </table>
|
| <table border="0" cellspacing="0" cellpadding="2" width="100%">
|
| <tr>
|
| <td colspan="2" bgcolor="#525D76">
|
| <font color="#ffffff" face="arial,helvetica.sanserif">
|
| <a name="getSize()">
|
| <strong>getSize()</strong></a></font>
|
| </td>
|
| </tr>
|
| <tr>
|
| <td NOWRAP> </td>
|
| <td>
|
|
|
| <p>
|
| <abstract> |
| Returns the number of error messages queued. |
| </abstract>
|
| </p>
|
| <p>
|
| <table width="100%"><tr><td bgcolor="EEEEEE">
|
| <font size="+1"><code>
|
| <signature> |
| int getSize() |
| </signature>
|
| </code></font>
|
| </td></tr></table>
|
| </p>
|
| <p>
|
| <table width="100%"><tr><td bgcolor="EEEEEE">
|
| <font size="+1"><code>
|
| <signature> |
| int getSize(String property) |
| </signature>
|
| </code></font>
|
| </td></tr></table>
|
| </p>
|
| <dl>
|
| <dt><strong>Parameters</strong></dt>
|
| <dd>
|
| <dl>
|
| <dt>property</dt>
|
| <dd>
|
| <parameter name="property"> |
| The category of errors to operate on. |
| </parameter>
|
| </dd>
|
|
|
|
|
| </dl>
|
| </dd>
|
| </dl>
|
| <dl>
|
| <dt><strong>Returns</strong></dt>
|
| <dd>
|
| <returns> |
| The number of error messages. |
| </returns>
|
| </dd>
|
| </dl>
|
|
|
| <p>Calling <code>getSize()</code> without the <code>property</code> parameter returns the total |
| number of queued error messages. The <code>property</code> parameter can be used to |
| obtain the number of queued error messages for a specific category.</p>
|
| <table width="100%" cellpadding="1" cellspacing="0" border="0"><tr><td bgcolor="#000000">
|
| <table width="100%" cellpadding="5" cellspacing="0" border="0"><tr><td bgcolor="#FFFFFF">
|
| <pre><sourcecode>$errors.getSize() |
| $errors.size |
| $errors.getSize("password")</sourcecode></pre>
|
| </td></tr></table>
|
| </td></tr></table>
|
|
|
|
|
| <br clear="all">
|
|
|
| </td>
|
| </tr>
|
| </table>
|
| <table border="0" cellspacing="0" cellpadding="2" width="100%">
|
| <tr>
|
| <td colspan="2" bgcolor="#525D76">
|
| <font color="#ffffff" face="arial,helvetica.sanserif">
|
| <a name="getGlobal()">
|
| <strong>getGlobal()</strong></a></font>
|
| </td>
|
| </tr>
|
| <tr>
|
| <td NOWRAP> </td>
|
| <td>
|
|
|
| <p>
|
| <abstract> |
| This a convenience method and the equivalent of |
| <code>$errors.get($errors.globalName)</code> |
| </abstract>
|
| </p>
|
| <p>
|
| <table width="100%"><tr><td bgcolor="EEEEEE">
|
| <font size="+1"><code>
|
| <signature> |
| List getGlobal() |
| </signature>
|
| </code></font>
|
| </td></tr></table>
|
| </p>
|
| <dl>
|
| <dt><strong>Returns</strong></dt>
|
| <dd>
|
| <returns> |
| A list of all errors stored under the "global" property. |
| </returns>
|
| </dd>
|
| </dl>
|
|
|
| <dl>
|
| <dt><strong>See Also</strong></dt>
|
| <dd>
|
| <see>The the section on get() for more information.</see>
|
| </dd>
|
| </dl>
|
|
|
|
|
| <br clear="all">
|
|
|
| </td>
|
| </tr>
|
| </table>
|
| <table border="0" cellspacing="0" cellpadding="2" width="100%">
|
| <tr>
|
| <td colspan="2" bgcolor="#525D76">
|
| <font color="#ffffff" face="arial,helvetica.sanserif">
|
| <a name="getAll()">
|
| <strong>getAll()</strong></a></font>
|
| </td>
|
| </tr>
|
| <tr>
|
| <td NOWRAP> </td>
|
| <td>
|
|
|
| <p>
|
| <abstract> |
| Returns a list of localized error messages for all errors queued. |
| </abstract>
|
| </p>
|
| <p>
|
| <table width="100%"><tr><td bgcolor="EEEEEE">
|
| <font size="+1"><code>
|
| <signature> |
| List getAll() |
| </signature>
|
| </code></font>
|
| </td></tr></table>
|
| </p>
|
| <p>
|
| <table width="100%"><tr><td bgcolor="EEEEEE">
|
| <font size="+1"><code>
|
| <signature> |
| List getAll(String bundle) |
| </signature>
|
| </code></font>
|
| </td></tr></table>
|
| </p>
|
| <dl>
|
| <dt><strong>Parameters</strong></dt>
|
| <dd>
|
| <dl>
|
| <dt>bundle</dt>
|
| <dd>
|
| <parameter name="bundle"> |
| The (non-default) message-resources bundle that holds the error messages. |
| </parameter>
|
| </dd>
|
|
|
|
|
| </dl>
|
| </dd>
|
| </dl>
|
| <dl>
|
| <dt><strong>Returns</strong></dt>
|
| <dd>
|
| <returns> |
| If the message resources are lacking an error message for a |
| particular message key, the key itself is used as an error message |
| and a warning is logged. |
| </returns>
|
| </dd>
|
| </dl>
|
|
|
| <p>The following example shows a macro to render the error messages:</p>
|
| <table width="100%" cellpadding="1" cellspacing="0" border="0"><tr><td bgcolor="#000000">
|
| <table width="100%" cellpadding="5" cellspacing="0" border="0"><tr><td bgcolor="#FFFFFF">
|
| <pre><sourcecode>#macro (errorMarkup) |
| #if ($errors.exist()) |
| <ul> |
| #foreach ($e in $errors.all ) |
| <li>$e</li> |
| #end |
| </ul> |
| #end |
| #end</sourcecode></pre>
|
| </td></tr></table>
|
| </td></tr></table>
|
| <p>This produces output similar to the following:</p>
|
| <table width="100%" cellpadding="1" cellspacing="0" border="0"><tr><td bgcolor="#000000">
|
| <table width="100%" cellpadding="5" cellspacing="0" border="0"><tr><td bgcolor="#FFFFFF">
|
| <pre><sourcecode><ul> |
| <li>The field Expiration Date is required.</li> |
| <li>The provided number is not a valid credit card number</li> |
| </ul></sourcecode></pre>
|
| </td></tr></table>
|
| </td></tr></table>
|
|
|
|
|
| <br clear="all">
|
|
|
| </td>
|
| </tr>
|
| </table>
|
| <table border="0" cellspacing="0" cellpadding="2" width="100%">
|
| <tr>
|
| <td colspan="2" bgcolor="#525D76">
|
| <font color="#ffffff" face="arial,helvetica.sanserif">
|
| <a name="get()">
|
| <strong>get()</strong></a></font>
|
| </td>
|
| </tr>
|
| <tr>
|
| <td NOWRAP> </td>
|
| <td>
|
|
|
| <p>
|
| <abstract> |
| Returns a list of localized error messages for a particular category |
| of errors. |
| </abstract>
|
| </p>
|
| <p>
|
| <table width="100%"><tr><td bgcolor="EEEEEE">
|
| <font size="+1"><code>
|
| <signature> |
| List get(String property) |
| </signature>
|
| </code></font>
|
| </td></tr></table>
|
| </p>
|
| <p>
|
| <table width="100%"><tr><td bgcolor="EEEEEE">
|
| <font size="+1"><code>
|
| <signature> |
| List get(String property, String bundle) |
| </signature>
|
| </code></font>
|
| </td></tr></table>
|
| </p>
|
| <dl>
|
| <dt><strong>Parameters</strong></dt>
|
| <dd>
|
| <dl>
|
| <dt>property</dt>
|
| <dd>
|
| <parameter name="property"> |
| The category of error messages to return. |
| </parameter>
|
| </dd>
|
|
|
| <dt>bundle</dt>
|
| <dd>
|
| <parameter name="bundle"> |
| The (non-default) message-resources bundle that holds the error messages. |
| </parameter>
|
| </dd>
|
|
|
|
|
| </dl>
|
| </dd>
|
| </dl>
|
| <dl>
|
| <dt><strong>Returns</strong></dt>
|
| <dd>
|
| <returns> |
| A <code>java.util.List</code> of <code>java.lang.String</code>. |
| If no error messages exist for the specified category, |
| <code>null</code> is returned. |
| If the message resources are lacking an error message for a |
| particular message key, the key itself is used as an error message |
| and a warning is logged. |
| </returns>
|
| </dd>
|
| </dl>
|
|
|
| <p>The following example shows a macro to render the error messages for a |
| particular category of errors:</p>
|
| <table width="100%" cellpadding="1" cellspacing="0" border="0"><tr><td bgcolor="#000000">
|
| <table width="100%" cellpadding="5" cellspacing="0" border="0"><tr><td bgcolor="#FFFFFF">
|
| <pre><sourcecode>#macro (errorMarkup $property) |
| #if ($errors.exist($property)) |
| <ul> |
| #foreach ($er in $errors.get($property) ) |
| <li>$er</li> |
| #end |
| </ul> |
| #end |
| #end</sourcecode></pre>
|
| </td></tr></table>
|
| </td></tr></table>
|
| <p>This produces output similar to the following:</p>
|
| <table width="100%" cellpadding="1" cellspacing="0" border="0"><tr><td bgcolor="#000000">
|
| <table width="100%" cellpadding="5" cellspacing="0" border="0"><tr><td bgcolor="#FFFFFF">
|
| <pre><sourcecode><ul> |
| <li>The field Expiration Date is required.</li> |
| <li>The provided number is not a valid credit card number</li> |
| </ul></sourcecode></pre>
|
| </td></tr></table>
|
| </td></tr></table>
|
|
|
|
|
| <br clear="all">
|
|
|
| </td>
|
| </tr>
|
| </table>
|
| <table border="0" cellspacing="0" cellpadding="2" width="100%">
|
| <tr>
|
| <td colspan="2" bgcolor="#525D76">
|
| <font color="#ffffff" face="arial,helvetica.sanserif">
|
| <a name="getMsgs()">
|
| <strong>getMsgs()</strong></a></font>
|
| </td>
|
| </tr>
|
| <tr>
|
| <td NOWRAP> </td>
|
| <td>
|
|
|
| <p>
|
| <abstract> |
| Renders the queued errors messages. |
| </abstract>
|
| </p>
|
| <p>
|
| <table width="100%"><tr><td bgcolor="EEEEEE">
|
| <font size="+1"><code>
|
| <signature> |
| String getMsgs() |
| </signature>
|
| </code></font>
|
| </td></tr></table>
|
| </p>
|
| <p>
|
| <table width="100%"><tr><td bgcolor="EEEEEE">
|
| <font size="+1"><code>
|
| <signature> |
| String getMsgs(String property) |
| </signature>
|
| </code></font>
|
| </td></tr></table>
|
| </p>
|
| <p>
|
| <table width="100%"><tr><td bgcolor="EEEEEE">
|
| <font size="+1"><code>
|
| <signature> |
| String getMsgs(String property, String bundle) |
| </signature>
|
| </code></font>
|
| </td></tr></table>
|
| </p>
|
| <dl>
|
| <dt><strong>Parameters</strong></dt>
|
| <dd>
|
| <dl>
|
| <dt>property</dt>
|
| <dd>
|
| <parameter name="property"> |
| The category of errors messages to render. |
| </parameter>
|
| </dd>
|
|
|
| <dt>bundle</dt>
|
| <dd>
|
| <parameter name="bundle"> |
| The (non-default) message-resources bundle that holds the error messages. |
| </parameter>
|
| </dd>
|
|
|
|
|
| </dl>
|
| </dd>
|
| </dl>
|
| <dl>
|
| <dt><strong>Returns</strong></dt>
|
| <dd>
|
| <returns> |
| The formatted error messages. If no errors are queued, an |
| empty <code>String</code> is returned. |
| </returns>
|
| </dd>
|
| </dl>
|
|
|
| <p>This method renders the queued error messages as a list. If the method |
| is called without a parameter, all queued errors are rendered. With the |
| parameter <code>property</code> the list of rendered messages can be |
| limited to a specific category of errors. Error message texts |
| are looked up in the message resources. If a message text |
| cannot be found, the message key will be displayed instead.</p>
|
| <p>The method expects a message header, a message footer, a message prefix |
| and a message suffix to be defined in the message resources. The corresponding |
| message keys are <code>errors.header</code>, <code>errors.footer</code>, |
| <code>errors.prefix</code> and <code>errors.suffix</code>.</p>
|
| <p>Assuming that the message resources contain the following |
| definitions:</p>
|
| <table width="100%" cellpadding="1" cellspacing="0" border="0"><tr><td bgcolor="#000000">
|
| <table width="100%" cellpadding="5" cellspacing="0" border="0"><tr><td bgcolor="#FFFFFF">
|
| <pre><sourcecode>errors.header=Please correct the following errors before proceeding:<ul> |
| errors.footer=</ul> |
| errors.prefix=<li> |
| errors.suffix=</li> |
| error01=The field Expiration Date is required. |
| error02=The input is not a valid credit card number. |
| ...</sourcecode></pre>
|
| </td></tr></table>
|
| </td></tr></table>
|
| <p>an error message would be rendered as follows:</p>
|
| <table width="100%" cellpadding="1" cellspacing="0" border="0"><tr><td bgcolor="#000000">
|
| <table width="100%" cellpadding="5" cellspacing="0" border="0"><tr><td bgcolor="#FFFFFF">
|
| <pre><sourcecode>Please correct the following errors before proceeding:<ul> |
| <li>The field Expiration Date is required.</li> |
| <li>The input is not a valid credit card number.</li> |
| </ul></sourcecode></pre>
|
| </td></tr></table>
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| <!-- FOOTER SEPARATOR -->
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| <!-- PAGE FOOTER -->
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| <div align="center"><font color="#525D76" size="-1"><em>
|
| Copyright © 1999-2003, Apache Software Foundation
|
| </em></font></div>
|
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