Mahmoud Elsonbati

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Showing posts from 2015

JQuery create drop down list with dynamic input if user ticked "Other" option

https://jsfiddle.net/melsonbati/955m0967/

best practices for java authentication via LDAP

/* * To change this template, choose Tools | Templates * and open the template in the editor. */ package com.dash.ejb.login; import java.util.Hashtable; import javax.naming.AuthenticationException; import javax.naming.Context; import javax.naming.NameNotFoundException; import javax.naming.NamingEnumeration; import javax.naming.NamingException; import javax.naming.SizeLimitExceededException; import javax.naming.directory.Attribute; import javax.naming.directory.Attributes; import javax.naming.directory.DirContext; import javax.naming.directory.InitialDirContext; import javax.naming.directory.SearchControls; import javax.naming.directory.SearchResult; public class MyLdapAuthinticator { private static String LDAP_SERVER="ldap server ip"; private static String LDAP_SERVER_PORT="ldap server port"; private static String LDAP_BASE_DN="dc=domain name,dc=com"; private static String LDAP_BIND_DN="CN=ldap power user,CN

JPA ordering list of entities

Example 1: @ Entity public class Course { ... @ ManyToMany @ OrderBy ( "lastname ASC" ) public List < Student > getStudents ( ) { ... } ; ... } Example 2: @ Entity public class Student { ... @ ManyToMany ( mappedBy = "students" ) @ OrderBy // ordering by primary key is assumed public List < Course > getCourses ( ) { ... } ; ... } Example 3: @ Entity public class Person { ... @ ElementCollection @ OrderBy ( "zipcode.zip, zipcode.plusFour" ) public Set < Address > getResidences ( ) { ... } ; ... } @ Embeddable public class Address { protected String street ; protected String city ; protected String state ; @ Embedded protected Zipcode zipcode ; } @ Embeddable public class Zipco

JQUERY MOBILE

prevent <button> from submitting a form just add this attribute type="button" to enforce it not to act as submit type

Regex tricks

1- match anything after the first space \s(.*)

Liferay AlloyUI useful practical user interface

<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>Example</title> <script src="http://cdn.alloyui.com/2.0.0/aui/aui-min.js"></script> <link href="http://cdn.alloyui.com/2.0.0/aui-css/css/bootstrap.min.css" rel="stylesheet"> </head> <body> <input type="text" id="some-input" /> <span id="counter"></span> character(s) remaining <script> YUI().use( 'aui-char-counter', function(Y) { new Y.CharCounter( { counter: '#counter', input: '#some-input', maxLength: 10 } ); } ); </script> </body> </html> AlloyUI’s character counter reports the number of characters you can enter in the text fie

sorting list of beans

public class Student implements Comparable < Student > { String name ; int age ; public Student ( String name , int age ) { this . name = name ; this . age = age ; } @Override public String toString () { return name + ":" + age ; } @Override public int compareTo ( Student o ) { return Comparators . NAME . compare ( this , o ); } public static class Comparators { public static Comparator < Student > NAME = new Comparator < Student >() { @Override public int compare ( Student o1 , Student o2 ) { return o1 . name . compareTo ( o2 . name ); } }; public static Comparator < Student > AGE = new Comparator < Student >() { @Override public int compare ( Student o1 , Student o2 ) {

JSF2 backing bean has a reference to another and re using request scoped properties in new requests

// note exam id and exam text are initialized from exam backing bean which is (request scoped) and in the same time they are traveling in each request @ManagedBean(name = "question")//Constants.QUESTION) @RequestScoped public class QuestionBean { private int examId; private String examText; @ManagedProperty(name="exam", value="#{exam}") private ExamBean exam; // getters and setters @PostConstruct public void init() { examId = exam.getExamId(); examText=exam.getExamText(); } } ------------------------XHTML page --------------------------------------- <?xml version="1.0"?> <f:view xmlns="http://www.w3.org/1999/xhtml" xmlns:c="http://java.sun.com/jsp/jstl/core" xmlns:f="http://java.sun.com/jsf/core" xmlns:h="http://java.sun.com/jsf/html" xmlns:ui="http://java.sun.com/jsf/facelets&qu

Very powerful yet simple JSF 2 with Ajax using render and renderd

in the jsf xhml <?xml version="1.0"?> <f:view xmlns="http://www.w3.org/1999/xhtml" xmlns:c="http://java.sun.com/jsp/jstl/core" xmlns:f="http://java.sun.com/jsf/core" xmlns:h="http://java.sun.com/jsf/html" xmlns:ui="http://java.sun.com/jsf/facelets" > <h:head /> <h:body> <h:form> <h:selectOneRadio value="#{question.questionType}" > <f:selectItem itemValue="single" itemLabel="Single Choice" /> <f:selectItem itemValue="multi" itemLabel="Multi Choice" /> <f:ajax execute="@this" render="selectedType" /> </h:selectOneRadio> <h:panelGroup id="selectedType"> <h:panelGroup layout="block" id="choices" rendered="#{question.questionType eq 'multi'}" > <table> <tr>

Oracle export /backup and import /restore schemas

A----------------------------------------EXPORT/BACKUP---------------------------------------------------- 1- make new folder for the backup let say c:/oracle/import/ MY_DATA_PUMP_DIRECTORY 2- sqlplus login as system user 3- CREATE DIRECTORY MY_DATA_PUMP_DIRECTORY AS 'c:/oracle/ MY_DATA_PUMP_DIRECTORY '; 4- grant all on directory MY_DATA_PUMP_DIRECTORY to system; 5- exit sqlplus and run the following from command line expdp system/password DIRECTORY=MY_DATA_PUMP_DIRECTORY DUMPFILE=schemaName.dmp logfile=schemaName.log SCHEMAS=schemaName B-----------------------------IMPORT/RESTORE-------------------------------------------------------------------- 1- make sure you have the directory MY_DATA_PUMP_DIRECTORY the same as for the import 2- impdp system/password DIRECTORY=MY_DATA_PUMP_DIRECTORY dumpfile=schemaName.dmp logfile=schemaName.log SCHEMAS=schemaName

oracle drop all tables and sequences in a certain schema

-- please never put a comment starting with " / " as this character means execute the previous line BEGIN FOR i IN (SELECT us.sequence_name FROM USER_SEQUENCES us) LOOP EXECUTE IMMEDIATE 'drop sequence '|| i.sequence_name ||''; END LOOP; FOR i IN (SELECT ut.table_name FROM USER_TABLES ut) LOOP EXECUTE IMMEDIATE 'drop table '|| i.table_name ||' CASCADE CONSTRAINTS '; END LOOP; END; -- the following character executes the whole block of pl sql code /

Custom java swing TextField that has auto complete feacher

package com.util; import java.awt.Point; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyEvent; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.File; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; import java.io.PrintWriter; import java.util.ArrayList; import java.util.List; import javax.swing.JMenuItem; import javax.swing.JPopupMenu; import javax.swing.JTextField; /** *Custom JText component that has a gentle auto complete menu * @author melsonbati */ public class JAutoCompleteTextField extends JTextField { private JPopupMenu popupMenu; private List<String> myList=new ArrayList<String>(); private File txtFile=null; private ActionListener menuListener = new ActionListener() { public void actionPerformed(ActionEvent event) { setText(event.getAct

Java Swing please wait panel

package test; import java.awt.BorderLayout; import java.awt.Dialog.ModalityType; import java.awt.Window; import java.awt.event.ActionEvent; import java.beans.PropertyChangeEvent; import java.beans.PropertyChangeListener; import javax.swing.*; public class PleaseWait{ public static void main(String[] args) { JButton showWaitBtn = new JButton(new ShowWaitAction("Show Wait Dialog")); JPanel panel = new JPanel(); panel.add(showWaitBtn); JFrame frame = new JFrame("Frame"); frame.getContentPane().add(panel); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); } } class ShowWaitAction extends AbstractAction { protected static final long SLEEP_TIME = 3 * 1000; public ShowWaitAction(String name) { super(name); } @Override public void actionPerformed(ActionEvent evt) { SwingWorker

textarea maxlenght for IE9

/*use this jquery func*/ window . onload = function () { var txts = document . getElementsByTagName ( 'TEXTAREA' ) for ( var i = 0 , l = txts . length ; i < l ; i ++) { if ( /^[0-9]+$/ . test ( txts [ i ]. getAttribute ( "maxlength" ))) { var func = function () { var len = parseInt ( this . getAttribute ( "maxlength" ), 10 ); if ( this . value . length > len ) { alert ( 'Maximum length exceeded: ' + len ); this . value = this . value . substr ( 0 , len ); return false ; } } txts [ i ]. onkeyup = func ; txts [ i ]. onblur = func ; } } }