public int doStartTag() throws JspException {
try {
SiteContext sc =
(SiteContext) pageContext.getRequest().getAttribute(SiteContext.SITE_CONTEXT_KEY);
AccessRuleEngine re =
ContextUtils.getAccessRuleEngine((HttpServletRequest) pageContext.getRequest());
Page page = null;
Page currentInTree = sc.getPage();
if (m_strParent != null) // 直接指定了要展现的根栏目
page = (Page) pageContext.getAttribute(m_strParent);
else if (m_iLevel > -1) { // 指定了要展现的级别
if (m_iLevel <= currentInTree.getLevel()) {
page = currentInTree;
while (m_iLevel < page.getLevel()) page = page.getParent();
}
} else { // 没有指定根栏目
TreeTag tt = (TreeTag) TagSupport.findAncestorWithClass(this, TreeTag.class);
if (tt != null) page = tt.getPage();
else page = sc.getBranch().getHome(re);
}
if (page == null) return SKIP_BODY;
m_enum = Collections.enumeration(page.getPages(re, false, true));
Object next = nextElement();
if (next == null) return SKIP_BODY;
m_bFirst = true;
if (m_strName != null) pageContext.setAttribute(m_strName, next);
return EVAL_BODY_BUFFERED;
} catch (Exception e) {
e.printStackTrace();
throw new JspException(e.getMessage());
}
}
