/** Process the tag. */
public int doStartTag() throws JspException {
try {
_iterator = null;
_index = 0;
_count = 0;
PageContextImpl pageContext = (PageContextImpl) this.pageContext;
ELContext env = pageContext.getELContext();
if (_beginExpr != null) _begin = (int) _beginExpr.evalLong(env);
else _begin = -1;
if (_endExpr != null) _end = (int) _endExpr.evalLong(env);
else _end = Integer.MAX_VALUE;
if (_stepExpr != null) _step = (int) _stepExpr.evalLong(env);
else _step = 0;
Object items = null;
if (_itemsExpr != null) {
items = _itemsExpr.evalObject(env);
_iterator = getIterator(items);
while (_index < _begin && _iterator.hasNext()) {
_index++;
_iterator.next();
}
} else if (_beginExpr == null)
throw new JspException(L.l("c:forEach must specify `items' or `begin'"));
else if (_endExpr == null)
throw new JspException(L.l("c:forEach must specify `items' or `begin'"));
else {
_iterator = new RangeIterator(_begin, _end);
_end = -1;
}
if (_varStatus != null) pageContext.setAttribute(_varStatus, this);
if (_var != null) _initialVar = pageContext.getAttribute(_var);
return doAfterBody();
} catch (Exception e) {
throw new JspException(e);
}
}
