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| <h1 class="content-header header-section1" id="ref_directive_global" itemprop="headline">global</h1> |
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| <div class="page-menu-title">Page Contents</div> |
| <ul><li><a class="page-menu-link" href="#autoid_94" data-menu-target="autoid_94">Synopsis</a></li><li><a class="page-menu-link" href="#autoid_95" data-menu-target="autoid_95">Description</a></li></ul> </div><a name="ref.directive.global"></a> |
| |
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| <h2 class="content-header header-section2" id="autoid_94">Synopsis</h2> |
| |
| |
| |
| <pre class="metaTemplate"> |
| <code class="inline-code"><#global <em class="code-color">name</em>=<em class="code-color">value</em>></code> |
| or |
| <code class="inline-code"><#global <em class="code-color">name1</em>=<em class="code-color">value1</em> <em class="code-color">name2</em>=<em class="code-color">value2</em> <em class="code-color">... nameN</em>=<em class="code-color">valueN</em>></code> |
| or |
| <code class="inline-code"><#global <em class="code-color">name</em>> |
| <em class="code-color">capture this</em> |
| </#global></code> |
| </pre> |
| |
| |
| <p>Where:</p> |
| |
| <ul> |
| <li> |
| <code class="inline-code"><em class="code-color">name</em></code>: name |
| of the variable. It is not expression. However, it can be |
| written as a string literal, which is useful if the variable |
| name contains reserved characters, for example |
| <code class="inline-code"><#global "foo-bar" = 1></code>. Note that this |
| string literal does not expand interpolations (as |
| <code class="inline-code">"${foo}"</code>). |
| </li> |
| |
| <li> |
| <code class="inline-code">=</code>: Assignment operator, which can also |
| be one of the shorthand assignment operators |
| (<code class="inline-code">++</code>, <code class="inline-code">+=</code>, etc.), just like |
| with <a href="ref_directive_assign.html">the |
| <code>assign</code> directive</a>, |
| </li> |
| |
| <li> |
| <code class="inline-code"><em class="code-color">value</em></code>: the |
| value to store. Expression. |
| </li> |
| </ul> |
| |
| |
| |
| |
| |
| <h2 class="content-header header-section2" id="autoid_95">Description</h2> |
| |
| |
| <p>This directive is similar to <a href="ref_directive_assign.html#ref.directive.assign"><code>assign</code></a>, but |
| the variable created will be visible in all <a href="dgui_misc_namespace.html">namespaces</a>, and will not be |
| inside any namespace. Exactly as if you would create (or replace) a |
| variable of the data-model. Hence, the variable is global. If a |
| variable with the same name already exists in the data-model, it |
| will be hidden by the variable created with this directive. If a |
| variable with the same name already exists in the current namespace, |
| that will hide the variable created with <code class="inline-code">global</code> |
| directive.</p> |
| |
| <p>For example, with <code class="inline-code"><#global x = 1></code> you |
| create a variable that is visible as <code class="inline-code">x</code> in all |
| namespaces, unless another variable called <code class="inline-code">x</code> |
| hides it (for example a variable what you have created as |
| <code class="inline-code"><#assign x = 2></code>). In this case, you can use |
| <a href="dgui_template_exp.html#dgui_template_exp_var_special">special |
| variable</a> <code class="inline-code">globals</code>, like |
| <code class="inline-code">${.globals.x}</code>. Note that with |
| <code class="inline-code">globals</code> you see all globally accessible |
| variables; not only the variables that were created with |
| <code class="inline-code">global</code> directive, but also the variables of the |
| data-model.</p> |
| |
| <p>Note for custom JSP tag users: The set of variables created |
| with this directive corresponds to the JSP page-scope. This means, |
| that if a custom JSP tag wants to get a page-scope attribute |
| (page-scope bean), a variable with the same name in the current |
| namespace will not hide it from the viewpoint of the JSP tag.</p> |
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