portletresponse.java

来自「jetspeed源代码」· Java 代码 · 共 153 行

/* ====================================================================
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 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
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 *    if and wherever such third-party acknowledgments normally appear.
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 * This software consists of voluntary contributions made by many
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 */

package org.apache.jetspeed.portlet;

import java.io.PrintWriter;
import java.io.IOException;

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

/**
 ** The <CODE>PortletResponse</CODE> interface represents the response
 ** sent to the client device.
 **
 ** <P>
 ** It is up to the portlet container to enhance, extend, or modify
 ** the response as required before it is actually sent to the client
 ** device.
 **
 ** @see   PortletRequest
 **
 ** @author   <A HREF="mailto:[e-mail]">Thomas F. Boehme</A>
 **/

public interface PortletResponse
{
    /**
     * Returns the writer object that can be used to contribute
     * markup to the portlet response.
     * 
     * <P>
     * It is important to note that the markup generated by the
     * portlet is either a full document or just a fragment of the
     * markup. A corresponding setting in the deployment descriptor
     * has to be made.
     * </P>
     * 
     * @return the print writer
     * @exception IOException
     *                   if the I/O operation fails
     */
    public PrintWriter getWriter () throws IOException;

    /**
     * Creates a portlet URI for the given portlet mode. The returned URI
     * can be further extended by adding portlet-specific parameters
     * and by attaching actions. Also, the portlet window will stay in the
     * same state as before.
     * 
     * @param mode
     *               the portlet mode
     * @return a portlet URI
     */
    public PortletURI createURI (Portlet.Mode mode);

    /**
     * Creates a portlet URI for the given portlet mode and given portlet
     * window state. The returned URI can be further extended
     * by adding portlet-specific parameters and by attaching actions.
     * 
     * @param mode
     *               the portlet mode
     * @param state
     *               the portlet window state
     * @return a portlet URI
     */
    public PortletURI createURI (Portlet.Mode mode, PortletWindow.State state);

    /**
     * <P>
     * Returns the encoded URI of the resource at the given path.
     * Encoding may include prefixing, conversion to absolute URL, etc.
     * </P>
     * <P>
     * To generate unprotected URI's like an image use the direct
     * path inside of you portlet (e.g. /myportlet/myimage.gif).
     * Otherwise, to generate protected URI's like an property file use the
     * path inside of your portlet prefixed with /portlet-inf/
     * (e.g. /portlet-inf/myportlet/myportlet.jsp)
     * </P>
     * 
     * @param path
     *               the path to the resource
     * @return the resource URI as string
     */
    public String encodeURI (String path);

    /**
     * Maps the given string value into this portlet's namespace.
     * Should be applied to every variable or name used in the
     * output stream. For example, an parameter used in forms,
     * a function name in javascript.
     * 
     * @param aValue
     *               the name to be mapped
     * @return the mapped name
     */
    public String encodeNamespace (String aValue);
}