Source

webwork / docs / tag-doc2.htm

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>WebWork 2 Tag Library Reference: Non-UI Tags</title>
    <link rel="stylesheet" type="text/css" href="tag-style.css" />
</head>

<body>

<h3>Quicklinks</h3>
<ul>
    <li><a href="#action">Action Tag</a></li>
    <li><a href="#bean">Bean Tag</a></li>
    <li><a href="#else">Else Tag</a></li>
    <li><a href="#elseif">ElseIf Tag</a></li>
    <li><a href="#if">If Tag</a></li>
    <li><a href="#iterator">Iterator Tag</a></li>
    <li><a href="#param">Param Tag</a></li>
    <li><a href="#property">Property Tag</a></li>
    <li><a href="#push">Push Tag</a></li>
    <li><a href="#set">Set Tag</a></li>
    <li><a href="#url">URL Tag</a></li>
</ul>

<br /><br />


<div class="bannerrow">
    <a name="action"></a>
    <em>WebWork UI Tags</em>
    <h4 class="title">Action Tag</h4>
</div>

<div class="content">

    <div class="subheader">Remarks</div>
    <div class="content">
        <p>Remarks</p>
    </div>

    <div class="subheader">Details</div>
    <div class="content">
        <table cellpadding="4" cellspacing="2" border="0" width="90%">
          <tr>
            <td class="rowtitle">Class:</td>
            <td>com.opensymphony.webwork.views.jsp.ActionTag</td>
          </tr>
          <tr>
            <td class="rowtitle">Syntax:</td>
            <td class="altrow">&lt;ww:action ... /&gt; <span class="conditional">[or]</span> &lt;ww:action&gt; ... &lt;/ww:action&gt;</td>
          </tr>
          <tr>
            <td class="rowtitle">Tag Body:</td>
            <td>Jsp</td>
          </tr>
        </table>
    </div>

    <div class="subheader">Attributes</div>
    <div class="content">
        <table cellpadding="4" width="90%">
          <tr>
            <th>Attribute</th>
            <th>Description</th>
            <th>Required</th>
          </tr>
          <tr>
            <td nowrap="nowrap">id&nbsp;<img src="superclass.png" border="0" alt="" /></td>
            <td></td>
            <td align="center"><span class="required">true</span></td>
          </tr>
          <tr>
            <td nowrap="nowrap" class="altrow">name</td>
            <td class="altrow">This attribute specifies the alias of the action.</td>
            <td align="center" class="altrow"><span class="required">true</span></td>
          </tr>
          <tr>
            <td nowrap="nowrap">namespace</td>
            <td>This parameter specifies a namespace to use with the action alias.</td>
            <td align="center">false</td>
          </tr>
        </table>
        <p>
        <img src="superclass.png" border="0" alt="" /> - Inheirited from superclass.</p>
    </div>

    <div class="subheader">Changes from WebWork 1</div>
    <div class="content">
        <p>Add Changes</p>
    </div>

    <div class="subheader">Example</div>
    <div class="content">
        <p>Add Example</p>
        <p>Jsp code:</p>
<pre>
</pre>
    </div>

</div>

<br />
    <hr />
<br />


<div class="bannerrow">
    <a name="bean"></a>
    <em>WebWork UI Tags</em>
    <h4 class="title">Bean Tag</h4>
</div>

<div class="content">

    <div class="subheader">Remarks</div>
    <div class="content">
        <p>This tag is used to instantiate a class that conforms to the JavaBeans specification and place it on top
            of the ValueStack. Parameters can be added by using the param tag withing the bean tag. When the bean
            tag is closed, it is removed from the ValueStack.</p>
    </div>

    <div class="subheader">Details</div>
    <div class="content">
        <table cellpadding="4" cellspacing="2" border="0" width="90%">
          <tr>
            <td class="rowtitle">Class:</td>
            <td>com.opensymphony.webwork.views.jsp.BeanTag</td>
          </tr>
          <tr>
            <td class="rowtitle">Syntax:</td>
            <td class="altrow">&lt;ww:bean ... /&gt; <span class="conditional">[or]</span> &lt;ww:bean&gt; ... &lt;/ww:bean&gt;</td>
          </tr>
          <tr>
            <td class="rowtitle">Tag Body:</td>
            <td>Jsp</td>
          </tr>
        </table>
    </div>

    <div class="subheader">Attributes</div>
    <div class="content">
        <table cellpadding="4" width="90%">
          <tr>
            <th>Attribute</th>
            <th>Description</th>
            <th>Required</th>
          </tr>
          <tr>
            <td nowrap="nowrap">id&nbsp;<img src="superclass.png" border="0" alt="" /></td>
            <td>If this attribute is specified, </td>
            <td align="center"><span class="required">true</span></td>
          </tr>
          <tr>
            <td nowrap="nowrap" class="altrow">name&nbsp;<img src="superclass.png" border="0" alt="" /></td>
            <td class="altrow"></td>
            <td align="center" class="altrow">false</td>
          </tr>
        </table>
        <p>
        <img src="superclass.png" border="0" alt="" /> - Inheirited from superclass.</p>
    </div>

    <div class="subheader">Changes from WebWork 1</div>
    <div class="content">
        <p>Add changes.</p>
    </div>

    <div class="subheader">Example</div>
    <div class="content">
        <p>Add example.</p>
<pre>
</pre>
    </div>

    <div class="subheader">See also</div>
    <div class="content">
        <p><a href="#param">ParamTag</a></p>
    </div>

</div>


<br />
    <hr />
<br />


<div class="bannerrow">
    <a name="else"></a>
    <em>WebWork UI Tags</em>
    <h4 class="title">Else Tag</h4>
</div>

<div class="content">

    <div class="subheader">Remarks</div>
    <div class="content">
        <p>This tag is used to determine if the preceding test was false.</p>
    </div>

    <div class="subheader">Details</div>
    <div class="content">
        <table cellpadding="4" cellspacing="2" border="0" width="90%">
          <tr>
            <td class="rowtitle">Class:</td>
            <td>com.opensymphony.webwork.views.jsp.ElseTag</td>
          </tr>
          <tr>
            <td class="rowtitle">Syntax:</td>
            <td class="altrow">&lt;ww:else&gt; ... &lt;/ww:else&gt;</td>
          </tr>
          <tr>
            <td class="rowtitle">Tag Body:</td>
            <td>Jsp</td>
          </tr>
        </table>
    </div>

    <div class="subheader">Attributes</div>
    <div class="content">
        <p>This tag has no attributes.</p>
    </div>

    <div class="subheader">Changes from WebWork 1</div>
    <div class="content">
        <p>Add changes.</p>
    </div>

    <div class="subheader">Example</div>
    <div class="content">
        <p>In this example, the body of the else tag will be evaluated since the test condition of the if tag
        evaluates to false.</p>
<pre>
&lt;ww:if test="true == false"&gt;
   &lt;b&gt;if: Failures&lt;/b&gt;
&lt;/ww:if&gt;

&lt;ww:else&gt;
   &lt;b&gt;else: Success&lt;/b&gt;
&lt;/ww:else&gt;
</pre>
        <p>Output:</p>
<pre>
   &lt;b&gt;else: Success&lt;/b&gt;
</pre>
    </div>

</div>


<br />
    <hr />
<br />



<div class="bannerrow">
    <a name="elseif"></a>
    <em>WebWork UI Tags</em>
    <h4 class="title">ElseIf Tag</h4>
</div>

<div class="content">

    <div class="subheader">Remarks</div>
    <div class="content">
        <p>This tag is used to determine if a statement is true or false after a previous test.</p>
    </div>

    <div class="subheader">Details</div>
    <div class="content">
        <table cellpadding="4" cellspacing="2" border="0" width="90%">
          <tr>
            <td class="rowtitle">Class:</td>
            <td>com.opensymphony.webwork.views.jsp.ElseIfTag</td>
          </tr>
          <tr>
            <td class="rowtitle">Syntax:</td>
            <td class="altrow">&lt;ww:elseif ... /&gt; <span class="conditional">[or]</span> &lt;ww:elseif&gt; ... &lt;/ww:elseif&gt;</td>
          </tr>
          <tr>
            <td class="rowtitle">Tag Body:</td>
            <td>Jsp</td>
          </tr>
        </table>
    </div>

    <div class="subheader">Attributes</div>
    <div class="content">
        <table cellpadding="4" width="90%">
          <tr>
            <th>Attribute</th>
            <th>Description</th>
            <th>Required</th>
          </tr>
          <tr>
            <td nowrap="nowrap">test</td>
            <td>This attribute is the conditional expression evaluated by the
                <acronym title="Object-Graph Navigation Language">OGNL</acronym> parser.
                It returns boolean true or false.</td>
            <td align="center"><span class="required">true</span></td>
          </tr>
        </table>
        <p>
        <img src="superclass.png" border="0" alt="" /> - Inheirited from superclass.</p>
    </div>

    <div class="subheader">Changes from WebWork 1</div>
    <div class="content">
        <p>Add changes.</p>
    </div>

    <div class="subheader">Example</div>
    <div class="content">
        <p>In this example, the body of the elseif tag will be evaluated since its test condition is true and
        the test condition of the if tag evaluates to false.</p>
<pre>
&lt;ww:if test="true == false"&gt;
   &lt;b&gt;if: Failures&lt;/b&gt;
&lt;/ww:if&gt;

&lt;ww:elseIf test="true == true"&gt;
   &lt;b&gt;elseIf: Success&lt;/b&gt;
&lt;/ww:elseIf&gt;

&lt;ww:else&gt;
   &lt;b&gt;else: Failure&lt;/b&gt;
&lt;/ww:else&gt;
</pre>
        <p>Output:</p>
<pre>
   &lt;b&gt;elseIf: Success&lt;/b&gt;
</pre>
    </div>

</div>


<br />
    <hr />
<br />



<div class="bannerrow">
    <a name="if"></a>
    <em>WebWork UI Tags</em>
    <h4 class="title">If Tag</h4>
</div>

<div class="content">

    <div class="subheader">Remarks</div>
    <div class="content">
        <p>This tag is used to determine if a statement is true or false.</p>
    </div>

    <div class="subheader">Details</div>
    <div class="content">
        <table cellpadding="4" cellspacing="2" border="0" width="90%">
          <tr>
            <td class="rowtitle">Class:</td>
            <td>com.opensymphony.webwork.views.jsp.IfTag</td>
          </tr>
          <tr>
            <td class="rowtitle">Syntax:</td>
            <td class="altrow">&lt;ww:if ... /&gt; <span class="conditional">[or]</span> &lt;ww:if&gt; ... &lt;/ww:if&gt;</td>
          </tr>
          <tr>
            <td class="rowtitle">Tag Body:</td>
            <td>Jsp</td>
          </tr>
        </table>
    </div>

    <div class="subheader">Attributes</div>
    <div class="content">
        <table cellpadding="4" width="90%">
          <tr>
            <th>Attribute</th>
            <th>Description</th>
            <th>Required</th>
          </tr>
          <tr>
            <td nowrap="nowrap">test</td>
            <td>This attribute is the conditional expression evaluated by the
                <acronym title="Object-Graph Navigation Language">OGNL</acronym> parser.
                It returns boolean true or false.</td>
            <td align="center"><span class="required">true</span></td>
          </tr>
        </table>
        <p>
        <img src="superclass.png" border="0" alt="" /> - Inheirited from superclass.</p>
    </div>

    <div class="subheader">Changes from WebWork 1</div>
    <div class="content">
        <p>Add changes.</p>
    </div>

    <div class="subheader">Example</div>
    <div class="content">
        <p>In this example, the body of the if tag will be evaluated since its test condition evaluates to true.</p>
    </div>
<pre>
&lt;ww:if test="true == true"&gt;
   &lt;b&gt;if: Success&lt;/b&gt;
&lt;/ww:if&gt;

&lt;ww:elseIf test="true == true"&gt;
   &lt;b&gt;elseIf: Failure&lt;/b&gt;
&lt;/ww:elseIf&gt;

&lt;ww:else&gt;
   &lt;b&gt;else: Failure&lt;/b&gt;
&lt;/ww:else&gt;
</pre>
        <p>Output:</p>
<pre>
   &lt;b&gt;if: Success&lt;/b&gt;
</pre>

</div>


<br />
    <hr />
<br />


<div class="bannerrow">
    <a name="iterator"></a>
    <em>WebWork UI Tags</em>
    <h4 class="title">Iterator Tag</h4>
</div>

<div class="content">

    <div class="subheader">Remarks</div>
    <div class="content">
        <p>Remarks</p>
    </div>

    <div class="subheader">Details</div>
    <div class="content">
        <table cellpadding="4" cellspacing="2" border="0" width="90%">
          <tr>
            <td class="rowtitle">Class:</td>
            <td>com.opensymphony.webwork.views.jsp.IteratorTag</td>
          </tr>
          <tr>
            <td class="rowtitle">Syntax:</td>
            <td class="altrow">&lt;ww:iterator ... /&gt; <span class="conditional">[or]</span> &lt;ww:iterator&gt; ... &lt;/ww:iterator&gt;</td>
          </tr>
          <tr>
            <td class="rowtitle">Tag Body:</td>
            <td>Jsp</td>
          </tr>
        </table>
    </div>

    <div class="subheader">Attributes</div>
    <div class="content">
        <table cellpadding="4" width="90%">
          <tr>
            <th>Attribute</th>
            <th>Description</th>
            <th>Required</th>
          </tr>
          <tr>
            <td nowrap="nowrap">status</td>
            <td></td>
            <td align="center">false</td>
          </tr>
          <tr>
            <td class="altrow" nowrap="nowrap">value</td>
            <td class="altrow"></td>
            <td class="altrow" align="center"><span class="required">true</span></td>
          </tr>
        </table>
        <p>
        <img src="superclass.png" border="0" alt="" /> - Inheirited from superclass.</p>
    </div>

    <div class="subheader">Changes from WebWork 1</div>
    <div class="content">
        <p>Add changes.</p>
    </div>

    <div class="subheader">Example</div>
    <div class="content">
        <p>Add example.</p>
<pre>
</pre>
    </div>

</div>


<br />
    <hr />
<br />


<div class="bannerrow">
    <a name="param"></a>
    <em>WebWork UI Tags</em>
    <h4 class="title">Param Tag</h4>
</div>

<div class="content">

    <div class="subheader">Remarks</div>
    <div class="content">
        <p>This tag allows you to add parameters to JspTags that implement the ParameterizedTag
        interface. Place one or more param tags within the body of a tag supporting parameters
        and the param tag will add its parameter to its parent.</p>
    </div>

    <div class="subheader">Details</div>
    <div class="content">
        <table cellpadding="4" cellspacing="2" border="0" width="90%">
          <tr>
            <td class="rowtitle">Class:</td>
            <td>com.opensymphony.webwork.views.jsp.ParamTag</td>
          </tr>
          <tr>
            <td class="rowtitle">Syntax:</td>
            <td class="altrow">&lt;ww:param ... /&gt;</td>
          </tr>
          <tr>
            <td class="rowtitle">Tag Body:</td>
            <td>empty</td>
          </tr>
        </table>
    </div>

    <div class="subheader">Attributes</div>
    <div class="content">
        <table cellpadding="4" width="90%">
          <tr>
            <th>Attribute</th>
            <th>Description</th>
            <th>Required</th>
          </tr>
          <tr>
            <td nowrap="nowrap">name</td>
            <td></td>
            <td align="center"><span class="required">true</span></td>
          </tr>
          <tr>
            <td class="altrow" nowrap="nowrap">value</td>
            <td class="altrow"></td>
            <td class="altrow" align="center">false</td>
          </tr>
        </table>
        <p>
        <img src="superclass.png" border="0" alt="" /> - Inheirited from superclass.</p>
    </div>

    <div class="subheader">Changes from WebWork 1</div>
    <div class="content">
        <p>Add changes.</p>
    </div>

    <div class="subheader">Example</div>
    <div class="content">
        <p>Add example.</p>
<pre>
&lt;ww:action name="webwork.util.Counter" id="year"&gt;
  &lt;ww:param name="first" value="firstBirthYear" /&gt;
  &lt;ww:param name="last" value="2000" /&gt;
&lt;/ww:action&gt;
</pre>
    </div>

</div>


<br />
    <hr />
<br />


<div class="bannerrow">
    <a name="property"></a>
    <em>WebWork UI Tags</em>
    <h4 class="title">Property Tag</h4>
</div>

<div class="content">

    <div class="subheader">Remarks</div>
    <div class="content">
        <p>This tag is used to retrieve a value and print it out.</p>
    </div>

    <div class="subheader">Details</div>
    <div class="content">
        <table cellpadding="4" cellspacing="2" border="0" width="90%">
          <tr>
            <td class="rowtitle">Class:</td>
            <td>com.opensymphony.webwork.views.jsp.PropertyTag</td>
          </tr>
          <tr>
            <td class="rowtitle">Syntax:</td>
            <td class="altrow">&lt;ww:property ... /&gt;</td>
          </tr>
          <tr>
            <td class="rowtitle">Tag Body:</td>
            <td>empty</td>
          </tr>
        </table>
    </div>

    <div class="subheader">Attributes</div>
    <div class="content">
        <table cellpadding="4" width="90%">
          <tr>
            <th>Attribute</th>
            <th>Description</th>
            <th>Required</th>
          </tr>
          <tr>
            <td nowrap="nowrap">value</td>
            <td></td>
            <td align="center">false</td>
          </tr>
        </table>
        <p>
        <img src="superclass.png" border="0" alt="" /> - Inheirited from superclass.</p>
    </div>

    <div class="subheader">Changes from WebWork 1</div>
    <div class="content">
        <p>Add changes.</p>
    </div>

    <div class="subheader">Example</div>
    <div class="content">
        <p>In this example, the property tag will call the getTime() method on the object pointed to by @timer.</p>
<pre>
Time:&lt;webwork:property value="@timer/time" /&gt;ms
</pre>
        <p>Output:</p>
<pre>
</pre>
    </div>

</div>


<br />
    <hr />
<br />


<div class="bannerrow">
    <a name="push"></a>
    <em>WebWork UI Tags</em>
    <h4 class="title">Push Tag</h4>
</div>

<div class="content">

    <div class="subheader">Remarks</div>
    <div class="content">
        <p>Remarks</p>
    </div>

    <div class="subheader">Details</div>
    <div class="content">
        <table cellpadding="4" cellspacing="2" border="0" width="90%">
          <tr>
            <td class="rowtitle">Class:</td>
            <td>com.opensymphony.webwork.views.jsp.PushTag</td>
          </tr>
          <tr>
            <td class="rowtitle">Syntax:</td>
            <td class="altrow">&lt;ww:push ... /&gt; <span class="conditional">[or]</span> &lt;ww:push&gt; ... &lt;/ww:push&gt;</td>
          </tr>
          <tr>
            <td class="rowtitle">Tag Body:</td>
            <td>Jsp</td>
          </tr>
        </table>
    </div>

    <div class="subheader">Attributes</div>
    <div class="content">
        <table cellpadding="4" width="90%">
          <tr>
            <th>Attribute</th>
            <th>Description</th>
            <th>Required</th>
          </tr>
          <tr>
            <td nowrap="nowrap">value</td>
            <td></td>
            <td align="center"><span class="required">true</span></td>
          </tr>
        </table>
        <p>
        <img src="superclass.png" border="0" alt="" /> - Inheirited from superclass.</p>
    </div>

    <div class="subheader">Changes from WebWork 1</div>
    <div class="content">
        <p>Add changes.</p>
    </div>

    <div class="subheader">Example</div>
    <div class="content">
        <p>Add example.</p>
<pre>
</pre>
    </div>

</div>


<br />
    <hr />
<br />


<div class="bannerrow">
    <a name="set"></a>
    <em>WebWork UI Tags</em>
    <h4 class="title">Set Tag</h4>
</div>

<div class="content">

    <div class="subheader">Remarks</div>
    <div class="content">
        <p>Remarks</p>
    </div>

    <div class="subheader">Details</div>
    <div class="content">
        <table cellpadding="4" cellspacing="2" border="0" width="90%">
          <tr>
            <td class="rowtitle">Class:</td>
            <td>com.opensymphony.webwork.views.jsp.SetTag</td>
          </tr>
          <tr>
            <td class="rowtitle">Syntax:</td>
            <td class="altrow">&lt;ww:set ... /&gt; <span class="conditional">[or]</span> &lt;ww:set&gt; ... &lt;/ww:set&gt;</td>
          </tr>
          <tr>
            <td class="rowtitle">Tag Body:</td>
            <td>Jsp</td>
          </tr>
        </table>
    </div>

    <div class="subheader">Attributes</div>
    <div class="content">
        <table cellpadding="4" width="90%">
          <tr>
            <th>Attribute</th>
            <th>Description</th>
            <th>Required</th>
          </tr>
          <tr>
            <td nowrap="nowrap">value</td>
            <td></td>
            <td align="center"><span class="required">true</span></td>
          </tr>
        </table>
        <p>
        <img src="superclass.png" border="0" alt="" /> - Inheirited from superclass.</p>
    </div>

    <div class="subheader">Changes from WebWork 1</div>
    <div class="content">
        <p>Add changes.</p>
    </div>

    <div class="subheader">Example</div>
    <div class="content">
        <p>Add example.</p>
<pre>
</pre>
    </div>

</div>


<br />
    <hr />
<br />


<div class="bannerrow">
    <a name="url"></a>
    <em>WebWork UI Tags</em>
    <h4 class="title">URL Tag</h4>
</div>

<div class="content">

    <div class="subheader">Remarks</div>
    <div class="content">
        <p>This tag creates an encoded URL using the value specified. If a value is not specified, the URL will point
        to the current page. Parameters can be added to the URL by using the param tag.</p>
    </div>

    <div class="subheader">Details</div>
    <div class="content">
        <table cellpadding="4" cellspacing="2" border="0" width="90%">
          <tr>
            <td class="rowtitle">Class:</td>
            <td>com.opensymphony.webwork.views.jsp.URLTag</td>
          </tr>
          <tr>
            <td class="rowtitle">Syntax:</td>
            <td class="altrow">&lt;ww:url ... /&gt; <span class="conditional">[or]</span> &lt;ww:url&gt; ... &lt;/ww:url&gt;</td>
          </tr>
          <tr>
            <td class="rowtitle">Tag Body:</td>
            <td>Jsp</td>
          </tr>
        </table>
    </div>

    <div class="subheader">Attributes</div>
    <div class="content">
        <table cellpadding="4" width="90%">
          <tr>
            <th>Attribute</th>
            <th>Description</th>
            <th>Required</th>
          </tr>
          <tr>
            <td nowrap="nowrap">id&nbsp;&nbsp;<img src="superclass.png" border="0" alt="" /></td>
            <td>If this attribute is set, the encoded URL will be placed in the request scope of the pageContext
                object under the value specified for the 'id' attribute.</td>
            <td align="center">false</td>
          </tr>
          <tr>
            <td class="altrow" nowrap="nowrap">value</td>
            <td class="altrow">This attribute specifies the value to encode. If this value is not specified, the
                URL will point to the current page.</td>
            <td class="altrow" align="center">false</td>
          </tr>
        </table>
        <p>
        <img src="superclass.png" border="0" alt="" /> - Inheirited from superclass.</p>
    </div>

    <div class="subheader">Changes from WebWork 1</div>
    <div class="content">
        <p>Add changes.</p>
    </div>

    <div class="subheader">Example</div>
    <div class="content">
        <p>In this example, the param tag is used to add name/value pairs to the specified action. Parameters
            can also be specified using the querystring; i.e., - "hiturl.action?user=john".</p>
<pre>
&lt;form action="&lt;ww:url value="'hiturl.action'"&gt;
      &lt;ww:param name="'user'" value="'john'" /&gt;
   &lt;/ww:url&gt;" method="POST"&gt;
</pre>
    </div>

    <div class="subheader">See Also</div>
    <div class="content">
        <p><a href="#param">ParamTag</a></p>
    </div>

</div>


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    <hr />
<br />

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