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

java.lang.Object
  javax.servlet.jsp.tagext.TagSupport
      javax.servlet.jsp.jstl.core.LoopTagSupport
          org.apache.taglibs.standard.tag.common.core.ForEachSupport

All Implemented Interfaces:

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

Direct Known Subclasses:

ForEachTag, ForEachTag

public abstract class ForEachSupport
extends javax.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 javax.servlet.jsp.jstl.core.LoopTagSupport class instead.

Author:

Shawn Bayern

See Also:

LoopTagSupport, Serialized Form

Nested Class Summary

protected static interface	ForEachSupport.ForEachIterator
protected class	ForEachSupport.SimpleForEachIterator

Field Summary

protected ForEachSupport.ForEachIterator	items
protected Object	rawItems

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

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

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

ForEachSupport()

Method Summary

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(Collection c)
protected ForEachSupport.ForEachIterator	toForEachIterator(double[] a)
protected ForEachSupport.ForEachIterator	toForEachIterator(Enumeration e)
protected ForEachSupport.ForEachIterator	toForEachIterator(float[] a)
protected ForEachSupport.ForEachIterator	toForEachIterator(int[] a)
protected ForEachSupport.ForEachIterator	toForEachIterator(Iterator i)
protected ForEachSupport.ForEachIterator	toForEachIterator(long[] a)
protected ForEachSupport.ForEachIterator	toForEachIterator(Map m)
protected ForEachSupport.ForEachIterator	toForEachIterator(Object o)
protected ForEachSupport.ForEachIterator	toForEachIterator(Object[] a)
protected ForEachSupport.ForEachIterator	toForEachIterator(short[] a)
protected ForEachSupport.ForEachIterator	toForEachIterator(String s)

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

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

Methods inherited from class javax.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 javax.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 javax.servlet.jsp.JspTagException

Specified by:

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

Throws:

javax.servlet.jsp.JspTagException

next

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

Specified by:

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

Throws:

javax.servlet.jsp.JspTagException

prepare

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

Specified by:

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

Throws:

javax.servlet.jsp.JspTagException

release

public void release()

Specified by:

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

Overrides:

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

supportedTypeForEachIterator

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

Throws:

javax.servlet.jsp.JspTagException

toForEachIterator

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

Throws:

javax.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)