actionurltagimpl.java

GridSphere 门户 提供一个基于 portlet 的高级开放源代码门户。GridSphere 是在欧盟提供基金的 GridLab 项目下开发的

/**
 * @author <a href="mailto:[e-mail]">Jason Novotny</a>
 * @version $Id: ActionURLTagImpl.java 4595 2006-03-06 00:23:28Z novotny $
 */
package org.gridsphere.provider.portlet.tags.jsr;

import org.gridsphere.provider.portletui.beans.ActionLinkBean;
import org.gridsphere.provider.portletui.beans.MessageStyle;
import org.gridsphere.provider.portletui.tags.ActionTag;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.PageContext;

/**
 * The <code>ActionLinkTag</code> provides a hyperlink element that includes a <code>DefaultPortletAction</code>
 * and can contain nested <code>ActionParamTag</code>s
 */
public class ActionURLTagImpl extends ActionTag {

    protected ActionLinkBean actionlink = null;
    protected String style = MessageStyle.MSG_INFO;

    /**
     * Sets the style of the text: Available styles are
     * <ul>
     * <li>nostyle</li>
     * <li>error</li>
     * <li>info</li>
     * <li>status</li>
     * <li>alert</li>
     * <li>success</li>
     *
     * @param style the text style
     */
    public void setStyle(String style) {
        this.style = style;
    }

    /**
     * Returns the style of the text: Available styles are
     * <ul>
     * <li>nostyle</li>
     * <li>error</li>
     * <li>info</li>
     * <li>status</li>
     * <li>alert</li>
     * <li>success</li>
     *
     * @return the text style
     */
    public String getStyle() {
        return style;
    }

    public int doStartTag() throws JspException {
        if (!beanId.equals("")) {
            actionlink = (ActionLinkBean) pageContext.getAttribute(getBeanKey(), PageContext.REQUEST_SCOPE);
            if (actionlink == null) {
                actionlink = new ActionLinkBean();
                actionlink.setStyle(style);
                this.setBaseComponentBean(actionlink);
            }
        } else {
            actionlink = new ActionLinkBean();
            this.setBaseComponentBean(actionlink);
            actionlink.setStyle(style);
        }

        if (name != null) actionlink.setName(name);
        if (anchor != null) actionlink.setAnchor(anchor);

        if (key != null) {
            actionlink.setKey(key);
            actionlink.setValue(getLocalizedText(key));
        }

        return EVAL_BODY_BUFFERED;
    }

    public int doEndTag() throws JspException {
        paramPrefixing = false;
        // set action to non-null
        if (action == null) action = "";

        String actionString = createActionURI();
        actionlink.setAction(actionString);

        if ((bodyContent != null) && (value == null)) {
            actionlink.setValue(bodyContent.getString());
        }

        if (imageBean != null) {
            String val = actionlink.getValue();
            if (val == null) val = "";
            actionlink.setValue(imageBean.toStartString() + val);
        }

        if (var == null) {
            try {
                JspWriter out = pageContext.getOut();
                out.print(actionString);
            } catch (Exception e) {
                throw new JspException(e);
            }
        } else {
            pageContext.setAttribute(var, actionString, PageContext.PAGE_SCOPE);
        }
        windowState = null;
        portletMode = null;
        return EVAL_PAGE;
    }

}