IqserBasePortlet

package de.iqser.portlets;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.Properties;

import javax.portlet.ActionRequest;
import javax.portlet.ActionResponse;
import javax.portlet.GenericPortlet;
import javax.portlet.PortletException;
import javax.portlet.PortletPreferences;
import javax.portlet.PortletRequest;
import javax.portlet.PortletRequestDispatcher;
import javax.portlet.RenderRequest;
import javax.portlet.RenderResponse;

public class IqserBasePortlet extends GenericPortlet {

	public final static String PARAM_ACTION= "PARAM_ACTION";
	// portlet actions
	public final static String ACTION_FILTER= "ACTION_FILTER";
	public final static String ACTION_INSERT_PREF= "ACTION_INSERT_PREF";
	public final static String ACTION_PREVIEW= "ACTION_PREVIEW";
	public final static String ACTION_SEARCH= "ACTION_SEARCH";
	public final static String ACTION_SHOW_BREADCRUMB= "ACTION_SHOW_BREADCRUMB";
	public final static String ACTION_SHOW_RELATED= "ACTION_SHOW_RELATED";
	public final static String ACTION_UPDATE_PREFS= "ACTION_UPDATE_PREFS";

	// parameters
	public final static String PARAM_CONTENT_TYPE= "PARAM_CONTENT_TYPE";
	public final static String PARAM_CONTENT_PROVIDER= "PARAM_CONTENT_PROVIDER";
	public final static String PARAM_ID= "PARAM_ID";
	public final static String PARAM_TITLE= "PARAM_TITLE";
	public final static String PARAM_SEARCH_INPUT= "PARAM_SEARCH_INPUT";
	public final static String PARAM_TYPES= "PARAM_TYPES";
	public final static String PARAM_SELECTED_TYPES= "PARAM_SELECTED_TYPES";
	public final static String PARAM_ERROR_MESSAGE= "ERROR_MESSAGE";
	public final static String PARAM_RELATED_LIST= "PARAM_RELATED_LIST";

	public final static String PUBLIC_RENDER_PARAM_SEARCH_INPUT= "searchInput";
	public final static String PUBLIC_RENDER_PARAM_CONTENT_ID= "contentId";
	public final static String PUBLIC_RENDER_PARAM_CONTENT_TYPE= "contentType";
	public final static String PUBLIC_RENDER_PARAM_CONTENT_PROVIDER= "contentProvider";

	// common portlet preferences
	public final static String PREF_IQSER_WEBSERVICE= "iQser Webservice";

	// session parameters
	public final static String DEIQSER_CACHED_DATA= "DEIQSER_CACHED_DATA";
	public final static String DEIQSER_RELATED_LIST= "DEIQSER_RELATED_LIST";
	public final static String DEIQSER_SEARCH_FIELD= "DEIQSER_SEARCH_FIELD";
	public final static String DEIQSER_SELECTED_TYPES= "DEIQSER_SELECTED_TYPES";
	public final static String DEIQSER_TREE_POSITION= "DEIQSER_TREE_POSITION";

	public final static String HIDE_SYSTEM_PREFERENCES= "HIDE_SYSTEM_PREFERENCES";

	protected static Properties props = null;

	private static final String _APPID = "IQSER";

	// Portlet init-Params
	protected String viewJSP;
	protected String helpJSP;
	protected String editJSP;

	// out of config.properties
	protected boolean isDebug = false;

	// Help articleId
	protected String _helpArticleId = null;

	private String hideSystemProperties = "true";

	public void doEdit(RenderRequest req, RenderResponse res)
			throws IOException, PortletException {

		if (hideSystemProperties != null) {
			req.setAttribute(HIDE_SYSTEM_PREFERENCES, hideSystemProperties);
		}

		PortletPreferences prefs = req.getPreferences();
		req.setAttribute("PortletPrefs", prefs);

		include(editJSP, req, res);

	}

	// a simple process action for preference handling
	// if more is needed, the child portlet must override this method
	// If the preference handling mechanism is needed, the overriding method can
	// call
	// the helper methods processActionUpdatePrefs and processActionInsertPref
	public void processAction(ActionRequest actionRequest,
			ActionResponse actionResponse) throws PortletException, IOException {

		String action = actionRequest.getParameter(PARAM_ACTION);

		if (action != null && action.equals(ACTION_UPDATE_PREFS)) {
			processActionUpdatePrefs(actionRequest);
			return;
		} else if (action != null && action.equals(ACTION_INSERT_PREF)) {
			processActionInsertPref(actionRequest, actionResponse);
			return;
		}

	}

	protected void processActionUpdatePrefs(ActionRequest actionRequest)
			throws PortletException, IOException {
		// first update all entries
		PortletPreferences prefs = actionRequest.getPreferences();
		Enumeration<String> enu1 = actionRequest.getParameterNames();
		while (enu1.hasMoreElements()) {
			String key = (String) enu1.nextElement();
			if (key.startsWith("###")) {
				String value = (String) actionRequest.getParameter(key);
				key = key.substring(3); // remove ###
				// System.out.println(key + " = " + value);
				prefs.setValue(key, value);
			}
		}
		Enumeration<String> enu2 = actionRequest.getParameterNames();
		while (enu2.hasMoreElements()) {
			// delete marked entries
			String key = (String) enu2.nextElement();
			if (key.startsWith("#-#")) {
				// a parameter which has to be deleted
				String keyToDelete = key.substring(3); // remove #-#
				// System.out.println("Delete :" + keyToDelete);
				prefs.reset(keyToDelete);
			}
		}
		prefs.store();
	}

	protected void processActionInsertPref(ActionRequest actionRequest,
			ActionResponse actionResponse) throws PortletException, IOException {

		String key = actionRequest.getParameter("insertPrefKey");
		String value = actionRequest.getParameter("insertPrefValue");
		// System.out.println("Insert :" + key + " = " + value);
		if (key != null && key.length() > 0) {
			// check if the special key TMSP was used
			if (key.equals("TMSP")) {
				// this is not a real preference, it is used to switch on or off
				// the display of system preferences
				if (value.equalsIgnoreCase("ON")) {
					hideSystemProperties = "false";
				} else {
					hideSystemProperties = "true";
				}
				return;
			}
			PortletPreferences prefs = actionRequest.getPreferences();
			prefs.setValue(key, value);
			prefs.store();
		}
	}

	protected void include(String path, RenderRequest req, RenderResponse res)
			throws IOException, PortletException {
		System.out.println("JSP-Path:" + path);
		PortletRequestDispatcher prd = getPortletContext()
				.getRequestDispatcher(path);

		if (prd == null) {
			System.out.println( path + " is not a valid include");
		} else {
			prd.include(req, res);
		}
	}


	protected Properties getProperties() {
		String workingDirectory = getWorkingDirectory();
		String fullFileName = workingDirectory + "/config/config.properties";
		InputStream is = null;
		try {
			is = new FileInputStream(fullFileName);
		} catch (FileNotFoundException ex) {
			System.out.println("Exception while loading properties from :"
					+ fullFileName);
		}
		try {
			if (props == null) {
				props = new Properties();
			}
			props.load(is);
			is.close();
		} catch (IOException ex) {
			System.out.println("Exception while loading properties from :"
					+ fullFileName);
		}
		return props;
	}

	private String getWorkingDirectory() {
		String workingDirectory = System.getProperty("working.directory") + "/" + _APPID;
		// String workingDirectory= System.getProperty(_WORKING_DIRECTORY);
		return workingDirectory;
	}

	protected String getProperty(PortletRequest request, String key) {
		getProperties();
		String value = props.getProperty(key);
		if (value == null) {
			System.out.println("Property " + key
					+ " was not found in the property file");
			return "";
		} else {
			return value;
		}
	}

	protected void printRequestData(PortletRequest request) {
 		System.out.println("\n************************");
 		System.out.println("Parameters");
 		Enumeration<String> enu= request.getParameterNames();
 		while( enu.hasMoreElements() ) {
 			String key= (String) enu.nextElement();
 			Object value= request.getParameter(key);
 			System.out.println(key + " = " + value);
 		}

 		System.out.println("Attributes");
 		enu= request.getAttributeNames();
 		while( enu.hasMoreElements() ) {
 			String key= (String) enu.nextElement();
 			Object value= request.getAttribute(key);
 			System.out.println(key + " = " + value);
 		}
 		System.out.println("************************\n\n");
 	}
}