Java tutorial
/* * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. * Copyright (c) 2013, MPL CodeInside http://codeinside.ru */ package ru.codeinside.gses.vaadin; import java.util.Collections; import java.util.HashMap; import java.util.List; import java.util.Map; import ru.codeinside.gses.vaadin.client.VAppletIntegration; import com.vaadin.Application; import com.vaadin.service.ApplicationContext; import com.vaadin.terminal.PaintException; import com.vaadin.terminal.PaintTarget; import com.vaadin.terminal.gwt.server.PortletApplicationContext; import com.vaadin.terminal.gwt.server.WebApplicationContext; import com.vaadin.ui.AbstractComponent; /** * Server side component for the VAppletIntegration widget. */ @com.vaadin.ui.ClientWidget(ru.codeinside.gses.vaadin.client.VAppletIntegration.class) public class AppletIntegration extends AbstractComponent { private static final long serialVersionUID = 6061722679712017720L; private String appletClass = null; private String codebase; private String name; private List<String> appletArchives = null; private Map<String, String> appletParams = null; private String command = null; private String[] commandParams = null; @Override public void paintContent(PaintTarget target) throws PaintException { super.paintContent(target); // Applet class if (appletClass == null) { // Do not paint anything of class is missing return; } target.addAttribute(VAppletIntegration.ATTR_APPLET_CLASS, appletClass); // Applet HTTP Session id String sid = getHttpSessionId(); if (sid != null) { target.addAttribute(VAppletIntegration.ATTR_APPLET_SESSION, sid); } // Applet archives if (appletArchives != null) { target.addAttribute(VAppletIntegration.ATTR_APPLET_ARCHIVES, appletArchives.toArray(new String[appletArchives.size()])); } // Applet codebase if (codebase != null) { target.addAttribute(VAppletIntegration.ATTR_APPLET_CODEBASE, codebase); } // Applet name if (name != null) { target.addAttribute(VAppletIntegration.ATTR_APPLET_NAME, name); } // Applet parameters if (appletParams != null) { target.addAttribute(VAppletIntegration.ATTR_APPLET_PARAM_NAMES, appletParams); } // Commands if (command != null) { target.addAttribute(VAppletIntegration.ATTR_CMD, command); command = null; } if (commandParams != null) { target.addAttribute(VAppletIntegration.ATTR_CMD_PARAMS, commandParams); commandParams = null; } } /** * Read the HTTP session id. * * This method cannot be called if this component has not been attached to * the application. * * @return */ protected String getHttpSessionId() { Application app = getApplication(); if (app != null) { ApplicationContext ctx = app.getContext(); if (ctx instanceof WebApplicationContext) { return ((WebApplicationContext) ctx).getHttpSession().getId(); } else if (ctx instanceof PortletApplicationContext) { return ((PortletApplicationContext) ctx).getHttpSession().getId(); } } return ""; } /** * Execute command in applet. * * @param command */ public void executeCommand(String command) { this.command = command; commandParams = null; requestRepaint(); } /** * Execute command with parameter in applet. * * @param command * @param params */ public void executeCommand(String command, String[] params) { this.command = command; commandParams = params; requestRepaint(); } /** * Set the fully qualified class name of the applet. * * This method is protected so that overriding classes can publish it if * needed. * * @param appletClass */ protected void setAppletClass(String appletClass) { this.appletClass = appletClass; } /** * Get the fully qualified class name of the applet. * * This method is protected so that overriding classes can publish it if * needed. * * @param appletClass */ protected String getAppletClass() { return appletClass; } /** * Set list of archives needed to run the applet. * * This method is protected so that overriding classes can publish it if * needed. * * @param appletClass */ protected void setAppletArchives(List<String> appletArchives) { this.appletArchives = appletArchives; } /** * Get list of archives needed to run the applet. * * This method is protected so that overriding classes can publish it if * needed. * * @param appletClass */ protected List<String> getAppletArchives() { return appletArchives; } /** * Get an applet paramter. These are name value pairs passed to the applet * element as PARAM& elements. * * This method is protected so that overriding classes can publish it if * needed. * */ protected String getAppletParams(String paramName) { if (appletParams == null) { return null; } return appletParams.get(paramName); } /** * Set an applet paramter. These are name value pairs passed to the applet * element as PARAM elements and should therefore be applied before first * the applet integration. * * This method is protected so that overriding classes can publish it if * needed. * */ protected void setAppletParams(String paramName, String paramValue) { if (appletParams == null) { appletParams = new HashMap<String, String>(); } appletParams.put(paramName, paramValue); } /** * Get map (name-value pairs) of parameter passed to the applet. * * This method is protected so that overriding classes can publish it if * needed. * * @param appletClass */ protected Map<String, String> getAppletParams() { return Collections.unmodifiableMap(appletParams); } /** * Set the codebase attribute for the applet. * * By default the codebase points to GWT modulepath, but this can be * overrided by setting it explicitly. * * @param codebase */ public void setCodebase(String codebase) { this.codebase = codebase; } /** * Set the codebase attribute for the applet. * * By default the codebase points to GWT modulepath, but this can be * overrided by setting it explicitly. * * @see #setCodebase(String) * @return codebase */ public String getCodebase() { return codebase; } /** * Set the name attribute for the applet. * * By default the is the same as the autogenerated id, but this can be * overridden by setting this explicitly. * * @param name */ public void setName(String name) { this.name = name; } /** * Get the name attribute for the applet. * * By default the is the same as the autogenerated id, but this can be * overridden by setting this explicitly. * * @see #setName(String) * @return name */ public String getName() { return name; } }