portleturi.java

来自「jetspeed源代码」· Java 代码 · 共 133 行

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package org.apache.jetspeed.portlet;

import org.apache.jetspeed.portlet.event.ActionListener;

/**
 * A <CODE>PortletURI</CODE> represents a URI to a specific portlet
 * function. A URI is created through the <CODE>PortletResponse</CODE>
 * for a specific portlet mode. Then additional parameter can be
 * added to the URI. The complete URI can be converted to a string
 * which is ready for embedding into markup.
 * 
 * <P>
 * On top of the parameters, it is possible to add actions to a
 * portlet URI. Actions are portlet-specific activities that need to
 * be performed as result of the incoming request, but before the
 * <CODE>service()</CODE> method of the portlet is called. For example,
 * the PERSONALIZE mode of the portlet is likely to have a "Save"
 * button at the end of its dialog. The "Save" button has to bring
 * the user back to the DEFAULT mode of the portlet, but to save the
 * personalized portlet data, the portlet needs to be able to process
 * the posted data bfore the next markup is generated. This can be
 * achieved by adding a "Save" action to the URI that represents the
 * "Save" button. The respective listener is attached the respective
 * action listener to the portlet response. This listener will be
 * called when the next request comes and one of the portlet URIs
 * where the reason for the request. If more than one URI were part
 * of the response, the listener need to the check the action content.
 * This depends on the definition of the actual action which is the
 * responsibility of the portlet developer.
 * </P>
 * 
 * @author <A HREF="mailto:[e-mail]">Thomas F. Boehme</A>
 */
public interface PortletURI
{
    /**
     ** Adds the given parameter to this URI. A portlet container
     ** may wish to prefix the attribute names internally, to preserve
     ** a unique namespace for the portlet.
     **
     ** @param   name
     **          the parameter name
     ** @param   value
     **          the parameter value
     **/

    public void addParameter (String name, String value);

    /**
     * Adds the given action to this URI. The action is a
     * portlet-defined implementation of the portlet action interface.
     * It can carry any information. How the information is recovered
     * should the next request be for this URI is at the discretion of
     * the portlet container.
     * 
     * <P>
     * Unless an action listener is registered in the portlet descriptor
     * this action will not be delivered.
     * </P>
     * 
     * @param action
     *               the portlet action
     */
    public void addAction (PortletAction action);

    /**
     ** Returns the complete URI as a string.
     ** The string is ready to be embedded in markup.
     **
     ** <P>
     ** Once the string has been created, adding more parameters
     ** or other listeners will not modify the string. You have to
     ** call this method again, to create an updated string.
     **
     ** @return   the encoded URI as a string
     **/

    public String toString ();
}