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## org.apache.struts.taglib.logic
Class ConditionalTagBase

    java.lang.Object
      javax.servlet.jsp.tagext.TagSupport
          org.apache.struts.taglib.logic.ConditionalTagBase

All Implemented Interfaces:
  Serializable, IterationTag, Tag

Direct Known Subclasses:
  CompareTagBase, EmptyTag, MatchTag, MessagesPresentTag, PresentTag

    public abstract class ConditionalTagBase

extends TagSupport

Abstract base class for the various conditional evaluation tags.

Version:
  $Rev: 471754 $ $Date: 2004-10-16 12:38:42 -0400 (Sat, 16 Oct 2004) $
See Also:
  Serialized Form

Field Summary
`protected String` | `cookie` The name of the cookie to be used as a variable.
`protected String` | `header` The name of the HTTP request header to be used as a variable.
`protected static MessageResources` | `messages` The message resources for this package.
`protected String` | `name` The name of the JSP bean to be used as a variable (if `property` is not specified), or whose property is to be accessed (if `property` is specified).
`protected String` | `parameter` The name of the HTTP request parameter to be used as a variable.
`protected String` | `property` The name of the bean property to be used as a variable.
`protected String` | `role` The name of the security role to be checked for.
`protected String` | `scope` The scope to search for the bean named by the name property, or "any scope" if null.
`protected String` | `user` The user principal name to be checked for.

Fields inherited from class javax.servlet.jsp.tagext.TagSupport
`id, pageContext`

Fields inherited from interface javax.servlet.jsp.tagext.IterationTag
`EVAL_BODY_AGAIN`

Fields inherited from interface javax.servlet.jsp.tagext.Tag
`EVAL_BODY_INCLUDE, EVAL_PAGE, SKIP_BODY, SKIP_PAGE`

Constructor Summary
`ConditionalTagBase()`

Method Summary
`protected abstract boolean` | `condition()` Evaluate the condition that is being tested by this particular tag, and return `true` if the nested body content of this tag should be evaluated, or `false` if it should be skipped.
`int` | `doEndTag()` Evaluate the remainder of the current page normally.
`int` | `doStartTag()` Perform the test required for this particular tag, and either evaluate or skip the body of this tag.
`String` | `getCookie()`
`String` | `getHeader()`
`String` | `getName()`
`String` | `getParameter()`
`String` | `getProperty()`
`String` | `getRole()`
`String` | `getScope()`
`String` | `getUser()`
`void` | `release()` Release all allocated resources.
`void` | `setCookie(String cookie)`
`void` | `setHeader(String header)`
`void` | `setName(String name)`
`void` | `setParameter(String parameter)`
`void` | `setProperty(String property)`
`void` | `setRole(String role)`
`void` | `setScope(String scope)`
`void` | `setUser(String user)`

Methods inherited from class javax.servlet.jsp.tagext.TagSupport
`doAfterBody, findAncestorWithClass, getId, getParent, getValue, getValues, removeValue, setId, setPageContext, setParent, setValue`

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

Field Detail

### messages

    protected static MessageResources messages

  The message resources for this package.

### cookie

    protected String cookie

  The name of the cookie to be used as a variable.

### header

    protected String header

  The name of the HTTP request header to be used as a variable.

### name

    protected String name

  The name of the JSP bean to be used as a variable (if `property` is not specified), or whose property is to be accessed (if `property` is specified).

### parameter

    protected String parameter

  The name of the HTTP request parameter to be used as a variable.

### property

    protected String property

  The name of the bean property to be used as a variable.

### role

    protected String role

  The name of the security role to be checked for.

### scope

    protected String scope

  The scope to search for the bean named by the name property, or "any scope" if null.

### user

    protected String user

  The user principal name to be checked for.

Constructor Detail

### ConditionalTagBase

    public ConditionalTagBase()

Method Detail

### getCookie

    public String getCookie()

### setCookie

    public void setCookie(String cookie)

### getHeader

    public String getHeader()

### setHeader

    public void setHeader(String header)

### getName

    public String getName()

### setName

    public void setName(String name)

### getParameter

    public String getParameter()

### setParameter

    public void setParameter(String parameter)

### getProperty

    public String getProperty()

### setProperty

    public void setProperty(String property)

### getRole

    public String getRole()

### setRole

    public void setRole(String role)

### getScope

    public String getScope()

### setScope

    public void setScope(String scope)

### getUser

    public String getUser()

### setUser

    public void setUser(String user)

### doStartTag

    public int doStartTag()
                   throws JspException

  Perform the test required for this particular tag, and either evaluate or skip the body of this tag.

  Specified by:
    `doStartTag` in interface `Tag`
  Overrides:
    `doStartTag` in class `TagSupport`
  Throws:
    `JspException` - if a JSP exception occurs

### doEndTag

    public int doEndTag()
                 throws JspException

  Evaluate the remainder of the current page normally.

  Specified by:
    `doEndTag` in interface `Tag`
  Overrides:
    `doEndTag` in class `TagSupport`
  Throws:
    `JspException` - if a JSP exception occurs

### release

    public void release()

  Release all allocated resources.

  Specified by:
    `release` in interface `Tag`
  Overrides:
    `release` in class `TagSupport`

### condition

    protected abstract boolean condition()
                                  throws JspException

  Evaluate the condition that is being tested by this particular tag, and return `true` if the nested body content of this tag should be evaluated, or `false` if it should be skipped. This method must be implemented by concrete subclasses.

  Throws:
    `JspException` - if a JSP exception occurs

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