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## 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
`static String` | `ANSWER`

Fields inherited from class org.apache.struts2.components.Component
`actionMapper, COMPONENT_STACK, devMode, parameters, stack, standardAttributesMap, throwExceptionOnELFailure`

Constructor Summary
`If(ValueStack stack)`

Method Summary
`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, altSyntax, completeExpressionIfAltSyntax, copyParams, determineActionURL, determineNamespace, end, fieldError, findAncestor, findString, findString, findStringIfAltSyntax, findValue, findValue, findValue, getComponentStack, getParameters, getStack, getStandardAttributes, isValidTagAttribute, popComponentStack, setActionMapper, setDevMode, setThrowExceptionsOnELFailure, setUrlHelper, stripExpressionIfAltSyntax, 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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