Help me with a state machine design

I have a little bit of a problem.  I have a system with several modes, each selected by the user and called with a case structure.  Each case in the case structure is its own state machine with a few states (like 4-6).  Now here's the catch.  I need one of the states within one of the modes to call and execute an entirely different mode (and all of its states) without actually changing the mode command, and to do so every iteration until I jump out of that state into another state within the first mode.
Is there a simple way to do that that I'm just not thinking of?
Lee Jay

Lee, my first thought would be to use just a big state machine.  For example if each mode needs 4 states, mode 1 gets states 0-3, mode 2 get states 4-7, and so on.  This way, if you need to change modes in the middle of another mode, you just direct the state selector to the state that starts the mode.  (If that makes sense).  It's not real elegant, but it works fairly well as you still maintain the flexibilty of the state machine design, including the ability to add and rearrange cases. 
Don't forget you can use any method to select the cases, including strings, so you have full flexibility with how you setup case select.
Troy

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  • Best method for state machine design for multi-dimensional clustered data

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  • How to use a event structure with a state machine

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    Solved!
    Go to Solution.

    I'm not sure exactly what you are asking, but it sounds like you want to script a bunch of tests and if the user says stop, to immediately stop the current test and abandon the others?  I'm going to assume that you know how to clear the array so that it will abandon the others, so I'm guessing that you are having trouble abandoning the current test?  If this is indeed the case, then the problem is that you are not able to propagate the message from the main VI FP which is the GUI to the sub vi which is the test, where the test may or may not have a GUI (FP visible) of it's own.  Threading was the first thing to come to mind, but this may not be necessary using events.
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    A
    Attachments:
    mainvi.vi ‏17 KB
    subvi.vi ‏33 KB

  • Producer Consumer with a state machine within the consumer

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    Attachments:
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  • Double Click Property Node not functioning with Queued State Machine

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    Hi
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    Tushar Jambhekar
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    LabVIEW Consultancy, LabVIEW Training
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    Attachments:
    Test Q.llb ‏55 KB
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  • Please help me with this statement

    Hi gurus, glad to be back!
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    SQL>  var xmltext varchar2(4000)
    SQL> --
    SQL> begin
      2    :xmltext :=
      3  '<SimpleTypeCompanion>
      4     <EnumerationValue description="Motor Carriers-Operate w/o Certificate or Permit" effectiveDate="1859-01-01">
      5             <Text>26</Text>
      6             <AssociatedValue type="SeverityLevelText" code="MSD">
      7                     <Text>Misdemeanor</Text>
      8             </AssociatedValue>
      9             <AssociatedValue type="SeverityLevelText" code="PMD">
    10                     <Text>Petty Misdemeanor</Text>
    11             </AssociatedValue>
    12             <AssociatedValue type="StatuteOrdinanceRuleCite">
    13                     <Text>221.291.4</Text>
    14             </AssociatedValue>
    15     </EnumerationValue>
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    18             <AssociatedValue type="SeverityLevelText" code="MSD">
    19                     <Text>Misdemeanor</Text>
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    21             <AssociatedValue type="SeverityLevelText" code="PMD">
    22                     <Text>Petty Misdemeanor</Text>
    23             </AssociatedValue>
    24             <AssociatedValue type="StatuteOrdinanceRuleCite">
    25                     <Text>299C.37.1(b)</Text>
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    27     </EnumerationValue>
    28  </SimpleTypeCompanion>';
    29  end;
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    SQL> set lines 150
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      2    from xmltable
      3         (
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      5           passing xmltype(:xmltext)
      6           columns
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    DESCRIPTION                      STATUTE_ID STATUTE_RULE_CIT MSD_TEXT   PMD_TEXT
    Motor Carriers-Operate w/o Certi         26 221.291.4        Misdemeano Petty Misd
    Police Communication Equipment-P          4 299C.37.1(b)     Misdemeano Petty Misd
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    SQL>

  • Serial commands with a state machine

    Hi,
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    Go to Solution.

    Remove your first while loop.  You are initializing the serial port over and over again until you press OK.  You only need to initialize once.  Put all of the code before the loop.  The loop should just delay for a few mS until the OK is pressed.  You should always put a dely in a loop so as not to chew up 100% CPU time.  Even a 0mS delay will allow the CPU time to do other things.
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  • Help with a state machine

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    Jim Stockton wrote in message
    news:[email protected]...
    > I am trying to setup a structure such that when a button is pressed
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    Like this?
    [Attachment timer.vi, see below]
    Attachments:
    timer.vi ‏22 KB

  • Help needed with if statement in a method

    Hi I�ve created 2 string arrays. One holds a one digit user id no. and the other holds a 4 digit pin number. I�ve then written a method which should take the userId no that has been sent to the method in the UserCode parameter find the same number in the custid array if it does it should then check the same position of the pin array and check that the pin number matches the pin no. the method has received in PINCode parameter.
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                   userId[9]="9";
              }// end drawframe method
              //     public Atm atmLink = (Atm)o;
                   public void update(Observable gm1, Object o)
                        Atm atmLink = (Atm)o;
                        tRefill.setText("Refill ATM ?");
                        atmLink.refill();
                   }//end update method
                   public void actionPerformed(ActionEvent ae)
                        if(ae.getSource() == refillbut)
    //                         Atm Atmobj.refill();
                        //     tRefill.setText("text area");     
                        //     atmLink.refill();
    //                         Atmobj.refill();
    //                         setChanged();
    //                         notifyObservers();
                        if(ae.getSource() == launchbut)
                             tLaunch.setText("new ATM opened");
                             Atm Atmobj1 = new Atm(this);
    //******** THIS METHOD RECEIVES THE PARAMETERS FROM THE ATM METHOD (LINE 580) (PINCODE AND USERCODE) BUT
    //******** IT ONLY THE ARRAY CALLED USERID (WHICH HOLDS THE USER CODE MATCHES ONE OF THE USERID'S)
    //******** I DO WANT IT TO DO THIS BUT I ALSO WANT IT TO MOVE ON AND CHECK THE PINCODE WITH THE PIN ARRAY)
    //******** IF THEY ARE BOTH TRUE I WANT IT TO RETURN TRUE - ELSE FALSE.     */                    
                   public boolean checkPinAndUserId(String pinCode, String userCode)
                        boolean found = false;
                        System.out.println("in checkpin method");
                        for (int i = 0; i < userId.length; i++)
                        System.out.println("in the userid array" + userId);
                             if (userCode.equals(userId[i]))
                                  System.out.println("checking user code array");
                                  if (pinCode.equals(pin[i]))
                                       System.out.println("checking the pin array" + pinCode);
                                       System.out.println("pin[i] = "+pin[i]);
                                  found = true;
                        return found;
         }// end HSBC class
    class Atm extends Observable implements ActionListener
              Frame f1;
              TextField t3, t5;
              JTextArea display = new JTextArea("Welcome to HSBC Bank. \n Please enter your User Identification number \n", 5, 40);
              JPanel p1, p2, p3,p4;
              private JButton but1, but2, but3, but4,but5,but6,but7,but8,but9,but0,enter,
              cancel,fivepounds,tenpounds,twentypounds,fiftypounds,clearbut, refillbut;
              int state = 1;                                        
              public String pinCode ="";
              public      String userCode ="";
              int userCodeCount = 0;
              int PINCount = 0;
              String withdrawAmount = "";
              int atmBalance =200;
              private HSBC HSBCobj;     
              //ATM constructor that receives the HSBCobj g1 reference to where the HSBC class
              // in in the program
              // Calls the drawATMFrame method
              // add the observer to the HSBCobj reference so that the ATM can tell HSBC that
              // something has changed
              public Atm(HSBC g1)
                   HSBCobj = g1;
                   drawATMFrame();
                   System.out.println("Starting Atm constructor");
                   addObserver(HSBCobj);     
              // this is the method that draws the ATM interface
              // also apply the Border Layout to the frame
              public void drawATMFrame()
                   f1=new Frame("ATM");
                   f1.setLayout(new BorderLayout());
                   f1.setSize(350, 250);
                   f1.addWindowListener(new WindowAdapter()
                        public void windowClosing(WindowEvent e)     
                             f1.dispose();
                             System.exit(0);     
                   // declare & instantiate all the buttons that will be used on the ATM
                   but1 =new JButton("1");
                   but1.addActionListener(this);
                   but2 =new JButton("2");
                   but2.addActionListener(this);
                   but3 =new JButton("3");
                   but3.addActionListener(this);
                   but4 =new JButton("4");
                   but4.addActionListener(this);
                   but5 =new JButton("5");
                   but5.addActionListener(this);
                   but6 =new JButton("6");
                   but6.addActionListener(this);
                   but7 =new JButton("7");
                   but7.addActionListener(this);
                   but8 =new JButton("8");
                   but8.addActionListener(this);
                   but9 =new JButton("9");
                   but9.addActionListener(this);
                   but0 =new JButton("0");
                   but0.addActionListener(this);
                   enter=new JButton("Enter");
                   enter.addActionListener(this);
                   cancel=new JButton("Cancel/ \n Restart");
                   cancel.addActionListener(this);
                   fivepounds =new JButton("?5");
                   fivepounds.addActionListener(this);
                   tenpounds = new JButton("?10");
                   tenpounds.addActionListener(this);
                   twentypounds = new JButton("?20");
                   twentypounds.addActionListener(this);
                   fiftypounds = new JButton("?50");
                   fiftypounds.addActionListener(this);
                   clearbut = new JButton("Clear");
                   clearbut.addActionListener(this);
                   refillbut = new JButton("Refill");
                   refillbut.addActionListener(this);
                   //declare & instantiate a textfield               
                   t3=new TextField(5);
                   // instantiate 4 JPanels     
                   p1=new JPanel();
                   p2=new JPanel();
                   p3=new JPanel();
                   p4=new JPanel();
                   // add some buttons to p1
                   p1.add(but1);
                   p1.add(but2);
                   p1.add(but3);
                   p1.add(but4);
                   p1.add(but5);
                   p1.add(but6);
                   p1.add(but7);
                   p1.add(but8);
                   p1.add(but9);               
                   p1.add(but0);
                   //add the text area field to p2
                   p2.add(display);
                   // apply the grid layout to p3
                   GridLayout layout3 = new GridLayout(4,1,5,5);
                   p3.setLayout(layout3);
                   p3.add(fivepounds);
                   p3.add(tenpounds);
                   p3.add(twentypounds);
                   p3.add(fiftypounds);
                   // apply grid layout to p4
                   GridLayout layout4 = new GridLayout(4,1,5, 5);
                   p4.setLayout(layout4);
                   p4.add(clearbut);
                   p4.add(enter);
                   p4.add(cancel);
                   p4.add(refillbut);
                   //add the panels to the different parts of the screen
                   f1.add("North", display);
                   f1.add("Center", p1);
                   f1.add("East", p4);
                   f1.add("West", p3);
                   f1.setVisible(true);
              }// end drawATMframe method
         public void actionPerformed(ActionEvent ae)
                   if(state == 1)
                             getUserIdNo(ae);
              else     if(state == 2)
                             doPINInput(ae);
                        else
                             withdrawCash(ae);     
         }// end action performed method               
    //******** STATE 1 events
    //******** USER ID INPUT
              public void getUserIdNo (ActionEvent ae)
                   if (ae.getSource() == but1)
                        display.append("*");
                        userCode = userCode + "1";
                        userCodeCount++;
                   if (ae.getSource() == but2)
                        display.append("*");
                        userCode = userCode + "2";
                        userCodeCount++;
                   if (ae.getSource() == but3)
                        display.append("*");
                        userCode = userCode + "3";
                        userCodeCount++;
                        System.out.println("user id ="+userCode);
                   if (ae.getSource() == but4)
                        display.append("*");
                        userCode = userCode = "4";
                        userCodeCount++;
                        System.out.println("user id ="+userCode);
                   if (ae.getSource() == but5)
                        display.append("*");
                        userCode = userCode + "5";
                        userCodeCount++;
                        System.out.println("user id ="+userCode);
                   if (ae.getSource() == but6)
                        display.append("*");
                        userCode = userCode + "6";
                        userCodeCount++;
                        System.out.println("user id ="+userCode);
                   if (ae.getSource() == but7)
                        display.append("*");
                        userCode = userCode + "7";
                        userCodeCount++;
                        System.out.println("user id ="+userCode);
                   if (ae.getSource() == but8)
                        display.append("*");
                        userCode = userCode + "8";
                        userCodeCount++;
                        System.out.println("user id ="+userCode);
                   if (ae.getSource() == but9)
                        display.append("*");
                        userCode = userCode + "9";
                        userCodeCount++;
                        System.out.println("user id ="+userCode);
                   if (ae.getSource() == but0)
                        display.append("*");
                        userCode = userCode + "0";
                        userCodeCount++;
                        System.out.println("user id ="+userCode);
                   if (ae.getSource() == cancel)
                        display.setText("Welcome to HSBC Bank.\n Please enter your User Identification number \n");
                        userCode = "";
                        state = 2;
                   if (ae.getSource() == clearbut)
                        display.setText("Please enter your user ID number again\n");
                        userCode = "";
                        userCodeCount = 0;
                   if (ae.getSource() == refillbut)
                        refill();
                   if (ae.getSource() == enter)
                        display.setText("Please enter your PIN \n");
                        state = 2;
                        System.out.println(" User id enter button = " + userCode);
                   if (userCodeCount == 1)
                        display.setText("Please enter your PIN \n");
                        userCode = "";
                        userCodeCount = 0;
                        state = 2;          
    //******** STATE 2               
    //******** PIN INPUT
                   public void doPINInput(ActionEvent ae)
                        if (ae.getSource() == but1)
                             {      pinCode = pinCode.concat("1");
                                  display.append("*");
                                  PINCount++;     
                        if (ae.getSource() == but2)
                             {      pinCode = pinCode.concat("2");
                                  display.append("*");
                                  PINCount++;     
                        if (ae.getSource() == but3)
                             {      pinCode = pinCode.concat("3");
                                  display.append("*");
                                  PINCount++;     
                        if (ae.getSource() == but4)
                             {      pinCode = pinCode.concat("4");
                                  display.append("*");
                                  PINCount++;     
                        if (ae.getSource() == but5)
                             {      pinCode = pinCode.concat("5");
                                  display.append("*");
                                  PINCount++;     
                        if (ae.getSource() == but6)
                             {      pinCode = pinCode.concat("6");
                                  display.append("*");
                                  PINCount++;     
                        if (ae.getSource() == but7)
                             {      pinCode = pinCode.concat("7");
                                  display.append("*");
                                  PINCount++;     
                        if (ae.getSource() == but8)
                             {      pinCode = pinCode.concat("8");
                                  display.append("*");
                                  PINCount++;     
                        if (ae.getSource() == but9)
                             {      pinCode = pinCode.concat("9");
                                  display.append("*");
                                  PINCount++;     
                        if (ae.getSource() == but0)
                             {      pinCode = pinCode.concat("0");
                                  display.append("*");
                                  PINCount++;     
                        if (ae.getSource() == clearbut)
                                  display.setText("Please enter your PIN number again \n");
                                  pinCode = "";     
                                  PINCount = 0;
                        if (ae.getSource() == cancel)
                                  display.setText("Welcome to HSBC Bank.\n Please enter your User Identification number \n");
                             state = 1;
                                  pinCode ="";
                                  PINCount = 0;                         
                        if (ae.getSource() == refillbut)
                                  refill();
    /// ************************ THIS BUTTON SENDS THE PIN & USER CODE OVER TO THE MAIN BANK
    /// ************************ (LINE 152)          
                        if (ae.getSource() == enter)
    //                         if(HSBCobj.checkPinAndUserId(pinCode, userCode))
    //                              display.setText("How much would you like to withdraw \n");
    //                    else
    //                         display.setText("Your UserId and Pin code do not match");
                        if(PINCount ==4)
                        if(HSBCobj.checkPinAndUserId(userCode,pinCode))
                                  display.setText("Enter the amount you \n want to withdraw \n ?");
                                  PINCount=0;
                        else
                        display.setText("Your User Identification Number \n and PIN number do not match! \n please try again\n");     
    //*********** STATE 3 events
    //*********** withdrawCash
         public void withdrawCash(ActionEvent ae)
    //               if (ae.getSource() == but1)
    //                    display.append("1");
    ///                    withdrawAmount = withdrawAmount+1;
         //               pinCode = pinCode.concat("2");
         //               System.out.println("Withdrawal Amount = "+withdrawAmount);
                   if(ae.getSource( ) == but1)
                        withdrawAmount = withdrawAmount + "1";
                        display.setText(withdrawAmount);
                   if(ae.getSource( ) == but2)
                        withdrawAmount = withdrawAmount + "2";
                        display.setText(withdrawAmount);
                   if(ae.getSource( ) == but3)
                        withdrawAmount = withdrawAmount + "3";
                        display.setText(withdrawAmount);
                   if(ae.getSource( ) == but4)
                        withdrawAmount = withdrawAmount + "4";
                        display.setText(withdrawAmount);
                   if(ae.getSource( ) == but5)
                        withdrawAmount = withdrawAmount + "5";
                        display.setText(withdrawAmount);
                   if(ae.getSource( ) == but6)
                        withdrawAmount = withdrawAmount + "6";
                        display.setText(withdrawAmount);
                   if(ae.getSource( ) == but7)
                        withdrawAmount = withdrawAmount + "7";
                        display.setText(withdrawAmount);
                   if(ae.getSource( ) == but8)
                        withdrawAmount = withdrawAmount + "8";
                        display.setText(withdrawAmount);
                   if(ae.getSource( ) == but9)
                        withdrawAmount = withdrawAmount + "9";
                        display.setText(withdrawAmount);
                   if(ae.getSource( ) == but0)
                        withdrawAmount = withdrawAmount + "0";
                        display.setText(withdrawAmount);
                   if (ae.getSource() == fivepounds)
                        withdrawAmount = withdrawAmount + "5";
                        display.setText(withdrawAmount);
                        atmBalance();
                   if (ae.getSource() == tenpounds)
                        withdrawAmount = withdrawAmount + "10";
                        display.setText(withdrawAmount);
                        atmBalance();
                   if (ae.getSource() == twentypounds)
                        withdrawAmount = withdrawAmount + "20";
                        display.setText(withdrawAmount);
                        atmBalance();
                   if (ae.getSource() == fiftypounds)
                        withdrawAmount = withdrawAmount + "50";
                        display.setText(withdrawAmount);
                        atmBalance();
         //          if (ae.getSource() == tenpounds)
         //               display.append("10");
         //               withdrawAmount = 10;
         //               pinCode = pinCode.concat("2");
         //               System.out.println("10 pound button pressed");
         //               atmBalance();
                   if (ae.getSource() == enter)
                        atmBalance();
                   if (ae.getSource() == refillbut)
                        System.out.println("refill but pressed");
                        refill();     
                   if (ae.getSource() == clearbut)
                        System.out.println("clear but pressed");
                        display.setText("Enter the amount you want to withdraw \n ?");
                        withdrawAmount="";
                   if (ae.getSource() == cancel)
                        display.setText("Welcome to HSBC Bank.\n Please enter your User Identification number \n");
                        withdrawAmount="";
                   pinCode ="";
                        PINCount = 0;
                        userCode = "";
                        userCodeCount = 0;
                        state = 1;
         }// end withdraw cash input method
         // checks balace of atm and withdraws cash. Also notifies onserver if atm balance is low     
              public void atmBalance()
                   String s = withdrawAmount;
                   int n = Integer.parseInt(s);
                   if ( atmBalance >= n)
                        atmBalance = atmBalance - n;
                        System.out.println("atm balance = "+ atmBalance);
                        display.setText("Thankyou for using HSBC. \nYou have withdrawn ?"+n);
                        if     (atmBalance<40)
                             System.out.println("atm balance is less than 40 - notify HSBC" );
                             setChanged();
                             notifyObservers(this);
                             /// note the refil should send a message to the controller
                             // advising a refil is needed. The Bank will send an engineer
                             // out who will fill the atm up
              }// end atmBalance method
              /// note the refil should send a message to the controller
              /// then th coontroller will send a message to this method to fill machine
              /// (this is simulating a clerk filling atm)
                   public void refill()
                        System.out.println("in refill method" );
                        atmBalance = 200;
                        System.out.println("Atm has been refilled. Atm balance = " + atmBalance);
                   //     setChanged();
                   //     notifyObservers(this);
                   }// end refill method
    // NOTE SURE ABOUT THIS - DO I USE THE UPDATE METHOD TO NOTIFY HSBC THAT ATM REQUIRES FILLING
    // THIS IS THE WRONG PART OF THE PROGRAM (SHOULD BE IN HSBC) - IGNORE
                   public void update(Observable gm1, Object gameObj)
                        display.setText("Congratulations");               
                   }//end update method
         }// end Atm method
    }// end Assignment2 class

  • Help needed with Update statements.

    Hello All,
    I am trying to learn Berkeley XMLDB and facing problem to query the inserted XML file. I have a small XML file with the following contents:
    &lt;?xml version="1.0" standalone="yes"?&gt;
    &lt;Bookstore&gt;
    &lt;Book&gt;
    &lt;book_ID&gt;1&lt;/book_ID&gt;
    &lt;title&gt;Harry Potter and the Order of the Phoenix&lt;/title&gt;
    &lt;subtitle&gt;A Photographic History&lt;/subtitle&gt;
    &lt;author&gt;
    &lt;author_fname&gt;J.K.&lt;/author_fname&gt;
    &lt;author_lname&gt;Rowling&lt;/author_lname&gt;
    &lt;/author&gt;
    &lt;price&gt;9.99&lt;/price&gt;
    &lt;year_published&gt;2004&lt;/year_published&gt;
    &lt;publisher&gt;Scholastic, Inc.&lt;/publisher&gt;
    &lt;genre&gt;Fiction&lt;/genre&gt;
    &lt;quantity_in_stock&gt;28997&lt;/quantity_in_stock&gt;
    &lt;popularity&gt;20564&lt;/popularity&gt;
    &lt;/Book&gt;
    &lt;/Bookstore&gt;
    When I try to update the TITLE of this node I have the following error message:
    C:\Users\Chandra\Desktop\BDB&gt;javac -classpath .;"C:\Program Files\Sleepycat Soft
    ware\Berkeley DB XML 2.1.8\jar\dbxml.jar";"C:\Program Files\Sleepycat Software\B
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    bdb.java:75: illegal start of expression
    public static final String STATEMENT1 = "replace value of node collection("twopp
    ro.bdbxml")/Bookstore/Book/bookid/title with 'NEWBOOK'";
    ^
    bdb.java:80: ')' expected
    System.out.println("Done query: " + STATEMENT1);
    ^
    2 errors
    But when I remove the update statements and just try to display the TITLE of this node, I dont see any outputs. Please help me to catch up with my mistakes. Below is source code I am using to run this functionality.
    Thanks.
    import java.io.File;
    import java.io.FileNotFoundException;
    import com.sleepycat.db.DatabaseException;
    import com.sleepycat.db.Environment;
    import com.sleepycat.db.EnvironmentConfig;
    import com.sleepycat.dbxml.XmlContainer;
    import com.sleepycat.dbxml.XmlException;
    import com.sleepycat.dbxml.XmlInputStream;
    import com.sleepycat.dbxml.XmlManager;
    import com.sleepycat.dbxml.XmlUpdateContext;
    import com.sleepycat.dbxml.XmlDocument;
    import com.sleepycat.dbxml.XmlQueryContext;
    import com.sleepycat.dbxml.XmlQueryExpression;
    import com.sleepycat.dbxml.XmlResults;
    import com.sleepycat.dbxml.XmlValue;
    public class bdb{
    public static void main(String[] args)
    Environment myEnv = null;
    File envHome = new File("D:/xmldata");
    try {
    EnvironmentConfig envConf = new EnvironmentConfig();
    envConf.setAllowCreate(true); // If the environment does not
    // exits, create it.
    envConf.setInitializeCache(true); // Turn on the shared memory
    // region.
    envConf.setInitializeLocking(true); // Turn on the locking subsystem.
    envConf.setInitializeLogging(true); // Turn on the logging subsystem.
    envConf.setTransactional(true); // Turn on the transactional
    envConf.setRunRecovery(true);
    // subsystem.
    myEnv = new Environment(envHome, envConf);
    // Do BDB XML work here.
    } catch (DatabaseException de) {
    // Exception handling goes here
    } catch (FileNotFoundException fnfe) {
    // Exception handling goes here
    } finally {
    try {
    if (myEnv != null) {
    myEnv.close();
    } catch (DatabaseException de) {
    // Exception handling goes here
    XmlManager myManager = null;
    XmlContainer myContainer = null;
    // The document
    String docString = "D:/xmldata/test.xml";
    // The document's name.
    String docName = "cia";
    try {
    myManager = new XmlManager(); // Assumes the container currently exists.
    myContainer =
    myManager.createContainer("twoppro.bdbxml");
    myManager.setDefaultContainerType(XmlContainer.NodeContainer); // Need an update context for the put.
    XmlUpdateContext theContext = myManager.createUpdateContext(); // Get the input stream.
    XmlInputStream theStream =
    myManager.createLocalFileInputStream(docString); // Do the actual put
    myContainer.putDocument(docName, // The document's name
    theStream, // The actual document.
    theContext, // The update context
    // (required).
    null); // XmlDocumentConfig object
    theStream.delete();
    // Update the title
    public static final String STATEMENT1 = "*replace value of node collection("twoppro.bdbxml")/Bookstore/Book/[bookid=1]/title with 'NEWBOOK'";*
    XmlQueryContext context = myManager.createQueryContext();
    XmlQueryExpression queryExpression1 = myManager.prepare(STATEMENT1, context);
    System.out.println("Try to execute query: " +
    System.out.println("Done query: " + STATEMENT1);
    queryExpression1.execute(context);
    // Get a query context
    XmlQueryContext context = myManager.createQueryContext();
    // Set the evaluation type to Lazy.
    context.setEvaluationType(XmlQueryContext.Lazy);
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    import com.sleepycat.dbxml.XmlDocument;
    import com.sleepycat.dbxml.XmlQueryContext;
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    import com.sleepycat.dbxml.XmlValue;
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  • Help need with Update statement -Two date columns

    I have two tables rate_change and load ,i want to update the next_rate_change_date and next_rate_change_date columns ,load table has rate_change_effe_term column has value (12) that represents months for each loan,
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    111111 03/01/2012 02/01/2014
    111111 06/01/2012 02/01/2014
    111111 07/01/2012 02/01/2014
    111111 08/01/2012 02/01/2014
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    111111 02/01/2014 02/01/2016
    111111 02/01/2016 02/01/2018
    111111 02/01/2018 02/01/2020
    111111 02/01/2020 02/01/2022
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         VALUES (111111, '02/01/2012', '02/01/2014');
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         VALUES (111111, '03/01/2012', '02/01/2014');
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         VALUES (111111, '06/01/2012', '02/01/2014');
    INSERT INTO rate_change
         VALUES (111111, '07/01/2012', '02/01/2014');
    INSERT INTO rate_change
         VALUES (111111, '08/01/2012', '02/01/2014');
    COMMIT;
    CREATE TABLE Load
       loan_number             NUMBER (10),
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       rate_change_effe_term   VARCHAR2 (20)
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         VALUES (111111, '02/20/2012', '24');
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    Loan_number   rate_chng_effective_date        next_rate_change_date
    111111            02/01/2012                             02/01/2014
    111111            03/01/2012                              02/01/2014
    111111            06/01/2012                             02/01/2014
    111111            07/01/2012                            02/01/2014
    111111            08/01/2012                            02/01/2014
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    Loan_number   rate_chng_effective_date        next_rate_change_date
    111111            02/01/2012                             02/01/2014
    111111            02/01/2014                            02/01/2016
    111111            02/01/2016                             02/01/2018
    111111            02/01/2018                            02/01/2020
    111111            02/01/2020                            02/01/2022
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    try with below query.
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                                                          WHERE loan_number  =111111) ),'MM/DD/YYYY'  )          
         ,next_rate_change_date      = To_CHAR(ADD_MONTHS((select MIN(TO_DATE(next_rate_change_date,'MM/DD/YYYY'))
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                                                          (rownum -1)*(select rate_change_effe_term 
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                                                          WHERE loan_number  =111111) ),'MM/DD/YYYY'  )
    WHERE  loan_number = 111111 ;Thanks,ram

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    Best Regards,
    JLS
    Best,
    JLS
    Sixclear
    Attachments:
    Change Settings Example.llb ‏46 KB

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