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## org.apache.struts2.dispatcher
Class StrutsResultSupport

    java.lang.Object
      org.apache.struts2.dispatcher.StrutsResultSupport

All Implemented Interfaces:
  Result, Serializable, StrutsStatics

Direct Known Subclasses:
  FreemarkerResult, PlainTextResult, PortletFreemarkerResult, PortletResult, PortletVelocityResult, ServletDispatcherResult, ServletRedirectResult, StreamResult, VelocityResult

    public abstract class StrutsResultSupport

extends Object
implements Result, StrutsStatics

A base class for all Struts action execution results. The "location" param is the default parameter, meaning the most common usage of this result would be:

This class provides two common parameters for any subclass:

- location - the location to go to after execution (could be a jsp page or another action). It can be parsed as per the rules definied in the `translateVariables` method
- parse - true by default. If set to false, the location param will not be parsed for expressions
- encode - false by default. If set to false, the location param will not be url encoded. This only have effect when parse is true

NOTE: The encode param will only have effect when parse is true

In the struts.xml configuration file, these would be included as:

      <result name="success" type="redirect">
          <param name="location">foo.jsp</param>
      </result>

or

      <result name="success" type="redirect" >
          <param name="location">foo.jsp?url=${myUrl}</param>
          <param name="parse">true</param>
          <param name="encode">true</param>
      </result>

In the above case, myUrl will be parsed against Ognl Value Stack and then URL encoded.

or when using the default parameter feature

      <result name="success" type="redirect">foo.jsp</result>

You should subclass this class if you're interested in adding more parameters or functionality to your Result. If you do subclass this class you will need to override `doExecute(String, ActionInvocation)`.

Any custom result can be defined in struts.xml as:

      <result-types>
          ...
          <result-type name="myresult" class="com.foo.MyResult" />
      </result-types>

Please see the `Result` class for more info on Results in general.

See Also:
  `Result`, Serialized Form

Field Summary
`private static Log` | `_log`
`static String` | `DEFAULT_PARAM` The default parameter
`private boolean` | `encode`
`private String` | `lastFinalLocation`
`private String` | `location`
`private boolean` | `parse`

Fields inherited from interface org.apache.struts2.StrutsStatics
`HTTP_REQUEST, HTTP_RESPONSE, PAGE_CONTEXT, SERVLET_CONTEXT, SERVLET_DISPATCHER, STRUTS_PORTLET_CONTEXT`

Constructor Summary
`StrutsResultSupport()`
`StrutsResultSupport(String location)`
`StrutsResultSupport(String location, boolean parse, boolean encode)`

Method Summary
`protected String` | `conditionalParse(String param, ActionInvocation invocation)` Parses the parameter for OGNL expressions against the valuestack
`protected abstract void` | `doExecute(String finalLocation, ActionInvocation invocation)` Executes the result given a final location (jsp page, action, etc) and the action invocation (the state in which the action was executed).
`void` | `execute(ActionInvocation invocation)` Implementation of the `execute` method from the `Result` interface.
`String` | `getLastFinalLocation()` Returns the last parsed and encoded location value
`void` | `setEncode(boolean encode)` Set encode to `true` to indicate that the location should be url encoded.
`void` | `setLocation(String location)` The location to go to after action execution.
`void` | `setParse(boolean parse)` Set parse to `true` to indicate that the location should be parsed as an OGNL expression.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### _log

    private static final Log _log

### DEFAULT_PARAM

    public static final String DEFAULT_PARAM

  The default parameter

  See Also:
    Constant Field Values

### parse

    private boolean parse

### encode

    private boolean encode

### location

    private String location

### lastFinalLocation

    private String lastFinalLocation

Constructor Detail

### StrutsResultSupport

    public StrutsResultSupport()

### StrutsResultSupport

    public StrutsResultSupport(String location)

### StrutsResultSupport

    public StrutsResultSupport(String location,
                               boolean parse,
                               boolean encode)

Method Detail

### setLocation

    public void setLocation(String location)

  The location to go to after action execution. This could be a JSP page or another action. The location can contain OGNL expressions which will be evaulated if the `parse` parameter is set to `true`.

  Parameters:
    `location` - the location to go to after action execution.
  See Also:
    `setParse(boolean)`

### getLastFinalLocation

    public String getLastFinalLocation()

  Returns the last parsed and encoded location value

### setParse

    public void setParse(boolean parse)

  Set parse to `true` to indicate that the location should be parsed as an OGNL expression. This is set to `true` by default.

  Parameters:
    `parse` - `true` if the location parameter is an OGNL expression, `false` otherwise.

### setEncode

    public void setEncode(boolean encode)

  Set encode to `true` to indicate that the location should be url encoded. This is set to `true` by default

  Parameters:
    `encode` - `true` if the location parameter should be url encode, `false` otherwise.

### execute

    public void execute(ActionInvocation invocation)
                 throws Exception

  Implementation of the `execute` method from the `Result` interface. This will call the abstract method `doExecute(String, ActionInvocation)` after optionally evaluating the location as an OGNL evaluation.

  Specified by:
    `execute` in interface `Result`
  Parameters:
    `invocation` - the execution state of the action.
  Throws:
    `Exception` - if an error occurs while executing the result.

### conditionalParse

    protected String conditionalParse(String param,
                                      ActionInvocation invocation)

  Parses the parameter for OGNL expressions against the valuestack

  Parameters:
    `param` - The parameter value
    `invocation` - The action invocation instance
  Returns:
    The resulting string

### doExecute

    protected abstract void doExecute(String finalLocation,
                                      ActionInvocation invocation)
                               throws Exception

  Executes the result given a final location (jsp page, action, etc) and the action invocation (the state in which the action was executed). Subclasses must implement this class to handle custom logic for result handling.

  Parameters:
    `finalLocation` - the location (jsp page, action, etc) to go to.
    `invocation` - the execution state of the action.
  Throws:
    `Exception` - if an error occurs while executing the result.

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