Package org.apache.taglibs.standard.tag.common.core

Class ForEachSupport

java.lang.Object

jakarta.servlet.jsp.tagext.TagSupport

jakarta.servlet.jsp.jstl.core.LoopTagSupport

org.apache.taglibs.standard.tag.common.core.ForEachSupport

All Implemented Interfaces:

jakarta.servlet.jsp.jstl.core.LoopTag, jakarta.servlet.jsp.tagext.IterationTag, jakarta.servlet.jsp.tagext.JspTag, jakarta.servlet.jsp.tagext.Tag, jakarta.servlet.jsp.tagext.TryCatchFinally, Serializable

Direct Known Subclasses:

ForEachTag, ForEachTag

public abstract class ForEachSupport
extends jakarta.servlet.jsp.jstl.core.LoopTagSupport

Support for tag handlers for <forEach>, the core iteration tag in JSTL 1.0. This class extends LoopTagSupport and provides ForEach-specific functionality. The rtexprvalue library and the expression-evaluating library each have handlers that extend this class.

Localized here is the logic for handling the veritable smorgasbord of types supported by <forEach>, including arrays, Collections, and others. To see how the actual iteration is controlled, review the jakarta.servlet.jsp.jstl.core.LoopTagSupport class instead.

Author:

Shawn Bayern

See Also:

LoopTagSupport, Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static interface	ForEachSupport.ForEachIterator
protected class	ForEachSupport.SimpleForEachIterator

Field Summary

Fields

Modifier and Type	Field	Description
protected ForEachSupport.ForEachIterator	items
protected Object	rawItems

Fields inherited from class jakarta.servlet.jsp.jstl.core.LoopTagSupport

begin, beginSpecified, deferredExpression, end, endSpecified, itemId, statusId, step, stepSpecified

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

id, pageContext

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

EVAL_BODY_AGAIN

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

EVAL_BODY_INCLUDE, EVAL_PAGE, SKIP_BODY, SKIP_PAGE

Constructor Summary

Constructors

Constructor	Description
ForEachSupport()

Method Summary

Modifier and Type	Method	Description
protected boolean	hasNext()
protected Object	next()
protected void	prepare()
void	release()
protected ForEachSupport.ForEachIterator	supportedTypeForEachIterator(Object o)
protected ForEachSupport.ForEachIterator	toForEachIterator(boolean[] a)
protected ForEachSupport.ForEachIterator	toForEachIterator(byte[] a)
protected ForEachSupport.ForEachIterator	toForEachIterator(char[] a)
protected ForEachSupport.ForEachIterator	toForEachIterator(double[] a)
protected ForEachSupport.ForEachIterator	toForEachIterator(float[] a)
protected ForEachSupport.ForEachIterator	toForEachIterator(int[] a)
protected ForEachSupport.ForEachIterator	toForEachIterator(long[] a)
protected ForEachSupport.ForEachIterator	toForEachIterator(short[] a)
protected ForEachSupport.ForEachIterator	toForEachIterator(Object o)
protected ForEachSupport.ForEachIterator	toForEachIterator(Object[] a)
protected ForEachSupport.ForEachIterator	toForEachIterator(String s)
protected ForEachSupport.ForEachIterator	toForEachIterator(Collection c)
protected ForEachSupport.ForEachIterator	toForEachIterator(Enumeration e)
protected ForEachSupport.ForEachIterator	toForEachIterator(Iterator i)
protected ForEachSupport.ForEachIterator	toForEachIterator(Map m)

Methods inherited from class jakarta.servlet.jsp.jstl.core.LoopTagSupport

doAfterBody, doCatch, doFinally, doStartTag, getCurrent, getDelims, getLoopStatus, setVar, setVarStatus, validateBegin, validateEnd, validateStep

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

doEndTag, 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

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

doEndTag, getParent, setPageContext, setParent

Field Detail

items

protected ForEachSupport.ForEachIterator items

rawItems

protected Object rawItems

Constructor Detail

ForEachSupport

public ForEachSupport()

Method Detail

hasNext

protected boolean hasNext()
                   throws jakarta.servlet.jsp.JspTagException

Specified by:

hasNext in class jakarta.servlet.jsp.jstl.core.LoopTagSupport

Throws:

jakarta.servlet.jsp.JspTagException

next

protected Object next()
               throws jakarta.servlet.jsp.JspTagException

Specified by:

next in class jakarta.servlet.jsp.jstl.core.LoopTagSupport

Throws:

jakarta.servlet.jsp.JspTagException

prepare

protected void prepare()
                throws jakarta.servlet.jsp.JspTagException

Specified by:

prepare in class jakarta.servlet.jsp.jstl.core.LoopTagSupport

Throws:

jakarta.servlet.jsp.JspTagException

release

public void release()

Specified by:

release in interface jakarta.servlet.jsp.tagext.Tag

Overrides:

release in class jakarta.servlet.jsp.jstl.core.LoopTagSupport

supportedTypeForEachIterator

protected ForEachSupport.ForEachIterator supportedTypeForEachIterator(Object o)
                                                               throws jakarta.servlet.jsp.JspTagException

Throws:

jakarta.servlet.jsp.JspTagException

toForEachIterator

protected ForEachSupport.ForEachIterator toForEachIterator(Object o)
                                                    throws jakarta.servlet.jsp.JspTagException

Throws:

jakarta.servlet.jsp.JspTagException

toForEachIterator

protected ForEachSupport.ForEachIterator toForEachIterator(Object[] a)

toForEachIterator

protected ForEachSupport.ForEachIterator toForEachIterator(boolean[] a)

toForEachIterator

protected ForEachSupport.ForEachIterator toForEachIterator(byte[] a)

toForEachIterator

protected ForEachSupport.ForEachIterator toForEachIterator(char[] a)

toForEachIterator

protected ForEachSupport.ForEachIterator toForEachIterator(short[] a)

toForEachIterator

protected ForEachSupport.ForEachIterator toForEachIterator(int[] a)

toForEachIterator

protected ForEachSupport.ForEachIterator toForEachIterator(long[] a)

toForEachIterator

protected ForEachSupport.ForEachIterator toForEachIterator(float[] a)

toForEachIterator

protected ForEachSupport.ForEachIterator toForEachIterator(double[] a)

toForEachIterator

protected ForEachSupport.ForEachIterator toForEachIterator(Collection c)

toForEachIterator

protected ForEachSupport.ForEachIterator toForEachIterator(Iterator i)

toForEachIterator

protected ForEachSupport.ForEachIterator toForEachIterator(Enumeration e)

toForEachIterator

protected ForEachSupport.ForEachIterator toForEachIterator(Map m)

toForEachIterator

protected ForEachSupport.ForEachIterator toForEachIterator(String s)