org.springframework.web.servlet.tags.form

Class CheckboxTag

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

org.springframework.web.servlet.tags.form.AbstractSingleCheckedElementTag

org.springframework.web.servlet.tags.form.CheckboxTag

All Implemented Interfaces:

Serializable, DynamicAttributes, IterationTag, JspTag, Tag, TryCatchFinally, EditorAwareTag

public class CheckboxTag
extends AbstractSingleCheckedElementTag

The <checkbox> tag renders an HTML 'input' tag with type 'checkbox'. May be used in one of three different approaches depending on the type of the bound value.

Approach One

When the bound value is of type Boolean then the 'input(checkbox)' is marked as 'checked' if the bound value is true. The 'value' attribute corresponds to the resolved value of the value property.

Approach Two

When the bound value is of type Collection then the 'input(checkbox)' is marked as 'checked' if the configured value is present in the bound Collection.

Approach Three

For any other bound value type, the 'input(checkbox)' is marked as 'checked' if the configured value is equal to the bound value.

Attribute Summary

Attribute	Required?	Runtime Expression?	Description
accesskey	false	true	HTML Standard Attribute
cssClass	false	true	HTML Optional Attribute
cssErrorClass	false	true	HTML Optional Attribute. Used when the bound field has errors.
cssStyle	false	true	HTML Optional Attribute
dir	false	true	HTML Standard Attribute
disabled	false	true	HTML Optional Attribute. Setting the value of this attribute to 'true' will disable the HTML element.
htmlEscape	false	true	Enable/disable HTML escaping of rendered values.
id	false	true	HTML Standard Attribute
label	false	true	Value to be displayed as part of the tag
lang	false	true	HTML Standard Attribute
onblur	false	true	HTML Event Attribute
onchange	false	true	HTML Event Attribute
onclick	false	true	HTML Event Attribute
ondblclick	false	true	HTML Event Attribute
onfocus	false	true	HTML Event Attribute
onkeydown	false	true	HTML Event Attribute
onkeypress	false	true	HTML Event Attribute
onkeyup	false	true	HTML Event Attribute
onmousedown	false	true	HTML Event Attribute
onmousemove	false	true	HTML Event Attribute
onmouseout	false	true	HTML Event Attribute
onmouseover	false	true	HTML Event Attribute
onmouseup	false	true	HTML Event Attribute
path	true	true	Path to property for data binding
tabindex	false	true	HTML Standard Attribute
title	false	true	HTML Standard Attribute
value	false	true	HTML Optional Attribute

Since:

2.0

Author:

Rob Harrop, Juergen Hoeller

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 and Description
CheckboxTag()

Method Summary

Modifier and Type	Method and Description
protected String	getInputType() Return the type of the HTML input element to generate: "checkbox" or "radio".
protected int	writeTagContent(TagWriter tagWriter) Renders the 'input(radio)' element with the configured value.
protected void	writeTagDetails(TagWriter tagWriter) Write the details for the given primary tag: i.e.

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

getLabel, getValue, setLabel, setValue

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

autogenerateId, isValidDynamicAttribute, renderFromBoolean, renderFromValue, renderFromValue

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

CheckboxTag

public CheckboxTag()

Method Detail

writeTagContent

protected int writeTagContent(TagWriter tagWriter)
                       throws JspException

Description copied from class: AbstractSingleCheckedElementTag

Renders the 'input(radio)' element with the configured value. Marks the element as checked if the value matches the bound value.

Overrides:

writeTagContent in class AbstractSingleCheckedElementTag

Returns:

valid tag render instruction as per Tag.doStartTag().

Throws:

JspException

writeTagDetails

protected void writeTagDetails(TagWriter tagWriter)
                        throws JspException

Description copied from class: AbstractSingleCheckedElementTag

Write the details for the given primary tag: i.e. special attributes and the tag's value.

Specified by:

writeTagDetails in class AbstractSingleCheckedElementTag

Throws:

JspException

getInputType

protected String getInputType()

Description copied from class: AbstractCheckedElementTag

Return the type of the HTML input element to generate: "checkbox" or "radio".

Specified by:

getInputType in class AbstractCheckedElementTag