org.springframework.web.servlet.tags.form

Class OptionTag

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.AbstractHtmlElementBodyTag

org.springframework.web.servlet.tags.form.OptionTag

All Implemented Interfaces:

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

public class OptionTag
extends AbstractHtmlElementBodyTag
implements BodyTag

The <option> tag renders a single HTML 'option'. Sets 'selected' as appropriate based on bound value.

Must be used nested inside a SelectTag.

Provides full support for databinding by marking an 'option' as 'selected' if the value matches the value bound to the out SelectTag.

The value property is required and corresponds to the 'value' attribute of the rendered 'option'.

An optional label property can be specified, the value of which corresponds to inner text of the rendered 'option' tag. If no label is specified then the value property will be used when rendering the inner text.

Attribute Summary

Attribute	Required?	Runtime Expression?	Description
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	HTML Optional Attribute
lang	false	true	HTML Standard Attribute
onclick	false	true	HTML Event Attribute
ondblclick	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
tabindex	false	true	HTML Standard Attribute
title	false	true	HTML Standard Attribute
value	true	true	HTML Optional Attribute

Since:

2.0

Author:

Rob Harrop, Juergen Hoeller

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static String	DISPLAY_VALUE_VARIABLE_NAME The name of the JSP variable used to expose the display value for this tag.
static String	VALUE_VARIABLE_NAME The name of the JSP variable used to expose the value for this tag.

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.BodyTag

EVAL_BODY_BUFFERED, EVAL_BODY_TAG

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
OptionTag()

Method Summary

Modifier and Type	Method and Description
protected String	autogenerateId() Autogenerate the 'id' attribute value for this tag.
protected void	exposeAttributes() Called during AbstractHtmlElementBodyTag.writeTagContent(org.springframework.web.servlet.tags.form.TagWriter) allowing subclasses to add any attributes to the PageContext as needed.
protected BindStatus	getBindStatus() Get the BindStatus for this tag.
protected String	getLabel() Get the text body of the rendered HTML <option> tag.
protected Object	getValue() Get the 'value' attribute of the rendered HTML <option> tag.
protected boolean	isDisabled() Get the value of the 'disabled' attribute.
protected void	onWriteTagContent() Make sure we are under a 'select' tag before proceeding.
protected void	removeAttributes() Called by AbstractHtmlElementBodyTag.doFinally() allowing subclasses to remove any attributes from the PageContext as needed.
protected void	renderDefaultContent(TagWriter tagWriter)
protected void	renderFromBodyContent(BodyContent bodyContent, TagWriter tagWriter) Render the tag contents based on the supplied BodyContent.
void	setDisabled(boolean disabled) Set the value of the 'disabled' attribute.
void	setLabel(String label) Set the text body of the rendered HTML <option> tag.
void	setValue(Object value) Set the 'value' attribute of the rendered HTML <option> tag.

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

doEndTag, doFinally, doInitBody, flushBufferedBodyContent, setBodyContent, shouldRender, writeTagContent

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, isValidDynamicAttribute, resolveCssClass, setCssClass, setCssErrorClass, setCssStyle, setDir, setDynamicAttribute, setLang, setOnclick, setOndblclick, setOnkeydown, setOnkeypress, setOnkeyup, setOnmousedown, setOnmousemove, setOnmouseout, setOnmouseover, setOnmouseup, setTabindex, setTitle, writeDefaultAttributes, writeOptionalAttributes

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

convertToDisplayString, 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, 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

Methods inherited from interface javax.servlet.jsp.tagext.BodyTag

doInitBody, setBodyContent

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

doAfterBody

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

doEndTag, doStartTag, getParent, release, setPageContext, setParent

Field Detail

VALUE_VARIABLE_NAME

public static final String VALUE_VARIABLE_NAME

The name of the JSP variable used to expose the value for this tag.

See Also:

Constant Field Values

DISPLAY_VALUE_VARIABLE_NAME

public static final String DISPLAY_VALUE_VARIABLE_NAME

The name of the JSP variable used to expose the display value for this tag.

See Also:

Constant Field Values

Constructor Detail

OptionTag

public OptionTag()

Method Detail

setValue

public void setValue(Object value)

Set the 'value' attribute of the rendered HTML <option> tag.

getValue

@Nullable
protected Object getValue()

Get the 'value' attribute of the rendered HTML <option> tag.

setDisabled

public void setDisabled(boolean disabled)

Set the value of the 'disabled' attribute.

isDisabled

protected boolean isDisabled()

Get the value of the 'disabled' attribute.

setLabel

public void setLabel(String label)

Set the text body of the rendered HTML <option> tag.

May be a runtime expression.

getLabel

@Nullable
protected String getLabel()

Get the text body of the rendered HTML <option> tag.

renderDefaultContent

protected void renderDefaultContent(TagWriter tagWriter)
                             throws JspException

Specified by:

renderDefaultContent in class AbstractHtmlElementBodyTag

Throws:

JspException

renderFromBodyContent

protected void renderFromBodyContent(BodyContent bodyContent,
                                     TagWriter tagWriter)
                              throws JspException

Description copied from class: AbstractHtmlElementBodyTag

Render the tag contents based on the supplied BodyContent.

The default implementation simply flushes the BodyContent directly to the output. Subclasses may choose to override this to add additional content to the output.

Overrides:

renderFromBodyContent in class AbstractHtmlElementBodyTag

Throws:

JspException

onWriteTagContent

protected void onWriteTagContent()

Make sure we are under a 'select' tag before proceeding.

Overrides:

onWriteTagContent in class AbstractHtmlElementBodyTag

exposeAttributes

protected void exposeAttributes()
                         throws JspException

Description copied from class: AbstractHtmlElementBodyTag

Called during AbstractHtmlElementBodyTag.writeTagContent(org.springframework.web.servlet.tags.form.TagWriter) allowing subclasses to add any attributes to the PageContext as needed.

Overrides:

exposeAttributes in class AbstractHtmlElementBodyTag

Throws:

JspException

getBindStatus

protected BindStatus getBindStatus()

Description copied from class: AbstractDataBoundFormElementTag

Get the BindStatus for this tag.

Overrides:

getBindStatus in class AbstractDataBoundFormElementTag

removeAttributes

protected void removeAttributes()

Description copied from class: AbstractHtmlElementBodyTag

Called by AbstractHtmlElementBodyTag.doFinally() allowing subclasses to remove any attributes from the PageContext as needed.

Overrides:

removeAttributes in class AbstractHtmlElementBodyTag

autogenerateId

protected String autogenerateId()
                         throws JspException

Description copied from class: AbstractDataBoundFormElementTag

Autogenerate the 'id' attribute value for this tag.

The default implementation simply delegates to AbstractDataBoundFormElementTag.getName(), deleting invalid characters (such as "[" or "]").

Overrides:

autogenerateId in class AbstractDataBoundFormElementTag

Throws:

JspException