ColumnTag.java 文件源码

/**
 * ${@inheritDoc}
 */
public int doStartTag() throws JspException {
    ListCommand command = ListTagUtil.getCurrentCommand(this, pageContext);
    ListTag parent = (ListTag) BodyTagSupport.findAncestorWithClass(this,
            ListTag.class);
    int retval = BodyTagSupport.SKIP_BODY;
    currentSortDir = fetchSortDir();

    if (command.equals(ListCommand.ENUMERATE)) {
        parent.addColumn();
        retval = BodyTagSupport.EVAL_PAGE;
        if (isSortable()) {
            parent.setSortable(true);
        }
    }
    else if (command.equals(ListCommand.COL_HEADER)) {
        renderHeader();
        retval = BodyTagSupport.EVAL_PAGE;
    }
    else if (command.equals(ListCommand.RENDER)) {
        if (isBound) {
            renderBound();
            retval = BodyTagSupport.SKIP_BODY;
        }
        else {
            renderUnbound();
            retval = BodyTagSupport.EVAL_BODY_INCLUDE;
        }
    }
    return retval;
}