java.lang.Object
- javax.servlet.jsp.tagext.TagSupport
- - org.springframework.web.servlet.tags.RequestContextAwareTag
  - - org.springframework.web.servlet.tags.HtmlEscapingAwareTag
    - - org.springframework.web.servlet.tags.form.AbstractFormTag
      - org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag
        org.springframework.web.servlet.tags.form.AbstractHtmlElementTag
        org.springframework.web.servlet.tags.form.AbstractHtmlInputElementTag
        org.springframework.web.servlet.tags.form.AbstractCheckedElementTag

All Implemented Interfaces:
Serializable, DynamicAttributes, IterationTag, JspTag, Tag, TryCatchFinally, EditorAwareTag
Direct Known Subclasses:
AbstractMultiCheckedElementTag, AbstractSingleCheckedElementTag
```
public abstract class AbstractCheckedElementTag
extends AbstractHtmlInputElementTag
```
Abstract base class to provide common methods for implementing databinding-aware JSP tags for rendering an HTML 'input' element with a 'type' of 'checkbox' or 'radio'.
Since:
2.5
Author:
Thomas Risberg, Juergen Hoeller, Rossen Stoyanchev
See Also:
Serialized Form

Field Summary
- Fields inherited from class org.springframework.web.servlet.tags.form.AbstractHtmlInputElementTag
  ACCESSKEY_ATTRIBUTE, DISABLED_ATTRIBUTE, ONBLUR_ATTRIBUTE, ONCHANGE_ATTRIBUTE, ONFOCUS_ATTRIBUTE, READONLY_ATTRIBUTE
- Fields inherited from class org.springframework.web.servlet.tags.form.AbstractHtmlElementTag
  CLASS_ATTRIBUTE, DIR_ATTRIBUTE, LANG_ATTRIBUTE, ONCLICK_ATTRIBUTE, ONDBLCLICK_ATTRIBUTE, ONKEYDOWN_ATTRIBUTE, ONKEYPRESS_ATTRIBUTE, ONKEYUP_ATTRIBUTE, ONMOUSEDOWN_ATTRIBUTE, ONMOUSEMOVE_ATTRIBUTE, ONMOUSEOUT_ATTRIBUTE, ONMOUSEOVER_ATTRIBUTE, ONMOUSEUP_ATTRIBUTE, STYLE_ATTRIBUTE, TABINDEX_ATTRIBUTE, TITLE_ATTRIBUTE
- Fields inherited from class org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag
  NESTED_PATH_VARIABLE_NAME
- Fields inherited from class org.springframework.web.servlet.tags.RequestContextAwareTag
  logger, REQUEST_CONTEXT_PAGE_ATTRIBUTE
- Fields inherited from class javax.servlet.jsp.tagext.TagSupport
  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
Constructors
Constructor Description
AbstractCheckedElementTag()

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`protected String`	`autogenerateId()`	Return a unique ID for the bound name within the current PageContext.
`protected abstract String`	`getInputType()`	Return the type of the HTML input element to generate: "checkbox" or "radio".
`protected boolean`	`isValidDynamicAttribute(String localName, Object value)`	Flags "type" as an illegal dynamic attribute.
`protected void`	`renderFromBoolean(Boolean boundValue, TagWriter tagWriter)`	Render the '`input(checkbox)`' with the supplied value, marking the '`input`' element as 'checked' if the supplied Boolean is `true`.
`protected void`	`renderFromValue(Object item, Object value, TagWriter tagWriter)`	Render the '`input(checkbox)`' with the supplied value, marking the '`input`' element as 'checked' if the supplied value matches the bound value.
`protected void`	`renderFromValue(Object value, TagWriter tagWriter)`	Render the '`input(checkbox)`' with the supplied value, marking the '`input`' element as 'checked' if the supplied value matches the bound value.
`protected abstract int`	`writeTagContent(TagWriter tagWriter)`	Writes the '`input`' element to the supplied `TagWriter`, marking it as 'checked' if appropriate.

Methods inherited from class org.springframework.web.servlet.tags.form.AbstractHtmlInputElementTag
getAccesskey, getOnblur, getOnchange, getOnfocus, isDisabled, isReadonly, setAccesskey, setDisabled, setOnblur, setOnchange, setOnfocus, setReadonly, writeOptionalAttributes

Methods inherited from class org.springframework.web.servlet.tags.form.AbstractHtmlElementTag
getCssClass, getCssErrorClass, getCssStyle, getDir, getDynamicAttributes, getLang, getOnclick, getOndblclick, getOnkeydown, getOnkeypress, getOnkeyup, getOnmousedown, getOnmousemove, getOnmouseout, getOnmouseover, getOnmouseup, getTabindex, getTitle, resolveCssClass, setCssClass, setCssErrorClass, setCssStyle, setDir, setDynamicAttribute, setLang, setOnclick, setOndblclick, setOnkeydown, setOnkeypress, setOnkeyup, setOnmousedown, setOnmousemove, setOnmouseout, setOnmouseover, setOnmouseup, setTabindex, setTitle, writeDefaultAttributes

Methods inherited from class org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag
convertToDisplayString, doFinally, getBindStatus, getBoundValue, getEditor, getId, getName, getNestedPath, getPath, getPropertyEditor, getPropertyPath, processFieldValue, resolveId, setId, setPath

Methods inherited from class org.springframework.web.servlet.tags.form.AbstractFormTag
createTagWriter, doStartTagInternal, evaluate, getDisplayString, getDisplayString, isDefaultHtmlEscape, writeOptionalAttribute

Methods inherited from class org.springframework.web.servlet.tags.HtmlEscapingAwareTag
htmlEscape, isHtmlEscape, isResponseEncodedHtmlEscape, setHtmlEscape

Methods inherited from class org.springframework.web.servlet.tags.RequestContextAwareTag
doCatch, doStartTag, getRequestContext

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

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

- Constructor Detail
  - AbstractCheckedElementTag
```
public AbstractCheckedElementTag()
```
- Method Detail
  - renderFromValue
```
protected void renderFromValue(Object value,
                               TagWriter tagWriter)
                        throws JspException
```
    Render the 'input(checkbox)' with the supplied value, marking the 'input' element as 'checked' if the supplied value matches the bound value.
    Throws:
    JspException
  - renderFromValue
```
protected void renderFromValue(Object item,
                               Object value,
                               TagWriter tagWriter)
                        throws JspException
```
    Render the 'input(checkbox)' with the supplied value, marking the 'input' element as 'checked' if the supplied value matches the bound value.
    Throws:
    JspException
  - renderFromBoolean
```
protected void renderFromBoolean(Boolean boundValue,
                                 TagWriter tagWriter)
                          throws JspException
```
    Render the 'input(checkbox)' with the supplied value, marking the 'input' element as 'checked' if the supplied Boolean is true.
    Throws:
    JspException
  - autogenerateId
```
protected String autogenerateId()
                         throws JspException
```
    Return a unique ID for the bound name within the current PageContext.
    Overrides:
    autogenerateId in class AbstractDataBoundFormElementTag
    Throws:
    JspException
  - writeTagContent
```
protected abstract int writeTagContent(TagWriter tagWriter)
                                throws JspException
```
    Writes the 'input' element to the supplied TagWriter, marking it as 'checked' if appropriate.
    Specified by:
    writeTagContent in class AbstractFormTag
    Returns:
    valid tag render instruction as per Tag.doStartTag().
    Throws:
    JspException
  - isValidDynamicAttribute
```
protected boolean isValidDynamicAttribute(String localName,
                                          Object value)
```
    Flags "type" as an illegal dynamic attribute.
    Overrides:
    isValidDynamicAttribute in class AbstractHtmlElementTag
  - getInputType
```
protected abstract String getInputType()
```
    Return the type of the HTML input element to generate: "checkbox" or "radio".

Class AbstractCheckedElementTag

Field Summary

Fields inherited from class org.springframework.web.servlet.tags.form.AbstractHtmlInputElementTag

Fields inherited from class org.springframework.web.servlet.tags.form.AbstractHtmlElementTag

Fields inherited from class org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag

Fields inherited from class org.springframework.web.servlet.tags.RequestContextAwareTag

Fields inherited from class javax.servlet.jsp.tagext.TagSupport

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

Fields inherited from interface javax.servlet.jsp.tagext.Tag

Constructor Summary

Method Summary

Methods inherited from class org.springframework.web.servlet.tags.form.AbstractHtmlInputElementTag

Methods inherited from class org.springframework.web.servlet.tags.form.AbstractHtmlElementTag

Methods inherited from class org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag

Methods inherited from class org.springframework.web.servlet.tags.form.AbstractFormTag

Methods inherited from class org.springframework.web.servlet.tags.HtmlEscapingAwareTag

Methods inherited from class org.springframework.web.servlet.tags.RequestContextAwareTag

Methods inherited from class javax.servlet.jsp.tagext.TagSupport

Methods inherited from class java.lang.Object

Constructor Detail

AbstractCheckedElementTag

Method Detail

renderFromValue

renderFromValue

renderFromBoolean

autogenerateId

writeTagContent

isValidDynamicAttribute

getInputType