org.apache.struts2.components

## Class If

- java.lang.Object
- - org.apache.struts2.components.Component
  - - org.apache.struts2.components.If

-     public class If
      extends Component

  Perform basic condition flow. 'If' tag could be used by itself or with 'Else If' Tag and/or single/multiple 'Else' Tag.

  - test* (Boolean) - Logic to determined if body of tag is to be displayed

        <s:if test="%{false}">
            <div>Will Not Be Executed</div>
        </s:if>
        <s:elseif test="%{true}">
            <div>Will Be Executed</div>
        </s:elseif>
        <s:else>
            <div>Will Not Be Executed</div>
        </s:else>

  See Also:
    `Else`, `ElseIf`

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static String` | `ANSWER`

    - ### Fields inherited from class org.apache.struts2.components.Component

      `actionMapper, COMPONENT_STACK, devMode, escapeHtmlBody, parameters, performClearTagStateForTagPoolingServers, stack, standardAttributesMap, throwExceptionOnELFailure`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `If(ValueStack stack)`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `boolean` | `end(Writer writer, String body)` Callback for the end tag of this component.
    `void` | `setTest(String test)`
    `boolean` | `start(Writer writer)` Callback for the start tag of this component.

    - ### Methods inherited from class org.apache.struts2.components.Component

      `addAllParameters, addParameter, completeExpression, copyParams, determineActionURL, determineNamespace, end, escapeHtmlBody, fieldError, findAncestor, findString, findString, findValue, findValue, findValue, getComponentStack, getNamespace, getParameters, getPerformClearTagStateForTagPoolingServers, getStack, getStandardAttributes, isAcceptableExpression, isValidTagAttribute, popComponentStack, setActionMapper, setDevMode, setEscapeHtmlBody, setNotExcludedAcceptedPatterns, setPerformClearTagStateForTagPoolingServers, setThrowExceptionsOnELFailure, setUrlHelper, stripExpression, toString, usesBody`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Field Detail

    - #### ANSWER

          public static final String ANSWER

      See Also:
        Constant Field Values

  - ### Constructor Detail

    - #### If

          public If(ValueStack stack)

  - ### Method Detail

    - #### setTest

          public void setTest(String test)

    - #### start

          public boolean start(Writer writer)

      Description copied from class: `Component`
      Callback for the start tag of this component. Should the body be evaluated?
      Overrides:
        `start` in class `Component`
      Parameters:
        `writer` - the output writer.
      Returns:
        true if the body should be evaluated

    - #### end

          public boolean end(Writer writer,
                             String body)

      Description copied from class: `Component`
      Callback for the end tag of this component. Should the body be evaluated again?
      NOTE: will pop component stack.
      Overrides:
        `end` in class `Component`
      Parameters:
        `writer` - the output writer.
        `body` - the rendered body.
      Returns:
        true if the body should be evaluated again

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