Help with findByDateRange method in CMP enity bean

Hello,
I am trying to deploy my entity beans to WebLogic 7, runnning on a Sun Solaris
box. The application connects to an Oracle 9i database. I am having problems with
2 queries in my ejb-jar.xml file which correspond to 2 finder methods. These finder
methods take two java.util.Date parameters. I have read that EJB QL does not support
dates or date literals in its WHERE clause and one has to use long values of these
dates. I tried various combinations but haven't been able get the query to work.
Here is an excerpt from my ejb-jar.xml file
<query>
<query-method>
<method-name>findBySalesOrderID</method-name>
<method-params>
<method-param>java.lang.Long</method-param>
</method-params>
</query-method>
<ejb-ql>
SELECT OBJECT(c) FROM Equipment c
WHERE c.salesOrderID = ?1
</ejb-ql>
</query>
<query>
<query-method>
<method-name>findEquipmentByStagingDateRange</method-name>
<method-params>
<method-param>java.util.Date</method-param>
<method-param>java.util.Date</method-param>
</method-params>
</query-method>
<ejb-ql>
<![CDATA[
SELECT OBJECT(c) FROM Equipment c
WHERE c.equipReqStageDate >= ?1 AND c.equipReqStageDate <= ?2
]]>
</ejb-ql>
</query>
<query>
<query-method>
<method-params>
<method-param>java.util.Date</method-param>
<method-param>java.util.Date</method-param>
</method-params>
</query-method>
<ejb-ql>
<![CDATA[
SELECT OBJECT(c) FROM Equipment c
WHERE c.equipReqShipDate >= ?1 AND c.equipReqShipDate <= ?2
]]>
</ejb-ql>
</query>
Do I have to change the method parameters to java.lana.Long or to 'long' literal
from java.util.Date?
Here is the finder method signature in the home interface
public java.util.Collection findEquipmentByStagingDateRange(java.util.Date begDate,
java.util.Date engDate) throws javax.ejb.FinderException, java.rmi.RemoteException;
public java.util.Collection findEquipmentByShippingDateRange(java.util.Date begDate,
java.util.Date engDate) throws javax.ejb.FinderException, java.rmi.RemoteException;
Do I have to pass in Dates or java.lang.Longs or 'long' literals?
Any help is really appreciated. Thanks.
[question.txt]

Did you try java.sql.Date?
/k
"John Carson" <[email protected]> wrote in message
news:[email protected]...
>
Hello,
I am trying to deploy my entity beans to WebLogic 7, runnning on a SunSolaris
box. The application connects to an Oracle 9i database. I am havingproblems with
2 queries in my ejb-jar.xml file which correspond to 2 finder methods.These finder
methods take two java.util.Date parameters. I have read that EJB QL doesnot support
dates or date literals in its WHERE clause and one has to use long valuesof these
dates. I tried various combinations but haven't been able get the query towork.
Here is an excerpt from my ejb-jar.xml file
<query>
<query-method>
<method-name>findBySalesOrderID</method-name>
<method-params>
<method-param>java.lang.Long</method-param>
</method-params>
</query-method>
<ejb-ql>
SELECT OBJECT(c) FROM Equipment c
WHERE c.salesOrderID = ?1
</ejb-ql>
</query>
<query>
<query-method>
<method-name>findEquipmentByStagingDateRange</method-name>
<method-params>
<method-param>java.util.Date</method-param>
<method-param>java.util.Date</method-param>
</method-params>
</query-method>
<ejb-ql>
<![CDATA[
SELECT OBJECT(c) FROM Equipment c
WHERE c.equipReqStageDate >= ?1 AND c.equipReqStageDate <= ?2
]]>
</ejb-ql>
</query>
<query>
<query-method>
<method-params>
<method-param>java.util.Date</method-param>
<method-param>java.util.Date</method-param>
</method-params>
</query-method>
<ejb-ql>
<![CDATA[
SELECT OBJECT(c) FROM Equipment c
WHERE c.equipReqShipDate >= ?1 AND c.equipReqShipDate <= ?2
]]>
</ejb-ql>
</query>
Do I have to change the method parameters to java.lana.Long or to 'long'literal
from java.util.Date?
Here is the finder method signature in the home interface
public java.util.Collection findEquipmentByStagingDateRange(java.util.DatebegDate,
java.util.Date engDate) throws javax.ejb.FinderException,java.rmi.RemoteException;
>
public java.util.CollectionfindEquipmentByShippingDateRange(java.util.Date begDate,
java.util.Date engDate) throws javax.ejb.FinderException,java.rmi.RemoteException;
>
Do I have to pass in Dates or java.lang.Longs or 'long' literals?
Any help is really appreciated. Thanks.

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There's a recent thread on the forum along a similar vein as this one but I hope mine doesn't cause as much annoyance! My homework assignment involves implementing three interfaces provided by my professor in order to create weighted, undirected graphs. The classes I have to implement are Node, Edge and Graph. Here are the Edge and Node interfaces for reference; they weren't too hard to implement:
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import java.util.ArrayList;
public class Graph {
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          healthy.createNode("Healthy", i, 4f);
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          unhealthy.createNode("Unhealthy", i, -4f);
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          Node orange = new Node();
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          Node cabbage = new Node();
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          Node riceCake = new Node();
          unhealthy.createNode("Rice cake", i, 2f);
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          unhealthy.createNode("Bacon", i, -4f);
          i++;
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          healthy2.setEndNode(cabbage);
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          neutral1.setStartNode(neutral);
          neutral1.setEndNode(riceCake);
          n++;
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          unhealthy1.setEndNode(chocolate);
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          food.edgeList.add(food3);
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          healthy.edgeList.add(healthy2);
          nodeList.add(healthy);
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          nodeList.add(neutral);
          unhealthy.edgeList.add(unhealthy1);
          unhealthy.edgeList.add(unhealthy2);
          unhealthy.edgeList.add(unhealthy3);
          nodeList.add(unhealthy);
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     public Graph createGraph(String name, int ID, Node[] nodes, Edge[] edges,
               Node root) {
          graphName = name;
          graphID = ID;
          graphNodes = nodes;
          graphEdges = edges;
          graphRoot = root;
          return null;
     public String getName() {
          return graphName;
     public Edge[] getEdges() {
          return graphEdges;
     public void addEdge(Edge e) {
     public Edge getEdge(String name, int ID) {
          return null;
     public void removeEdge(Edge e) {
     public Node[] getNodes() {
          return graphNodes;
     public void addNode(Node n) {
          nodeList.add(n);
     public Node getNode(String name, int ID) {
          int ni = nodeList.indexOf(name);
          Node rNode = nodeList.get(ni);
          return rNode;
     public void removeNode(Node n) {
          nodeList.remove(n);
     public void setRoot(Node n) {
          graphRoot = n;
     public Node getRoot() {
          return graphRoot;
     private String graphName;
     private int graphID;
     private Node[] graphNodes;
     private Edge[] graphEdges;
     private Node graphRoot;
     private static ArrayList<Node> nodeList = new ArrayList<Node>();
}The problem I have is that I don't know how to get around the fact that I'm making a static reference to the non-static method *createGraph*. I'd really appreciate your help. Thanks for your time!

GiselleT wrote:
public interface Edge {
     public Edge createEdge(String name, int ID, float weight);
I want to kick your professor right in the grapes for this bit of idiocy. It's at the source of your problems.
This looks very fishy and very bad. I wouldn't expect an Edge to create another Edge. Likewise for Node and Graph. You might have static factory methods in these classes, but by defining it in the interfaces, these methods have to be non-static. This leads to such ridiculous code as you have like this:
Edge uselessEdge = new Edge();
Edge actualEdge = uselessEdge.createEdge("abc", 1, 2.34);It's not your fault that it's useless. That's the way you have to do it with that senseless requirement.
The problem I have is that I don't know how to get around the fact that I'm making a static reference to the non-static method createGraph.
Static reference in non-static context errors are always addressed the same way: Either make the member in question static (usually the wrong choice) or create an instance.
In this case, you need to do like you did with Edge, and create a useless dummy Graph whose only purpose is to create other Graphs:
Graph graph = uselessGraph();
Graph actualGraph = uselessGraph.createGraph(...);Then, inside the createGraph method, you'll create a Graph with new and do thatGraph.name = name; and so on for each of the parameters/members.
Really, though, this is just an awful, awful approach though. Are you sure your prof really requires Edge to have a non-static createEdge method, and so on?

Please help with this method

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d.setForeground(Color.black);
waitNSeconds(1);
d.fill(pacarc);
pac1x += 4;
d.setForeground(Color.yellow);
pacarc = new Arc(pac1x,pac1y,pacsize1,pacsize2,pacmouth3,pacangle3);
d.fill(pacarc);
d.setForeground(Color.black);
waitNSeconds(1);
d.fill(pacarc);
while (startdwn++<stopdwn)
pac1y +=4;
d.setForeground(Color.yellow);
pacarc = new Arc(pac1x,pac1y,50,50,pacdwn1,pacdwnang1);
d.fill(pacarc);
d.setForeground(Color.black);
waitNSeconds(1);
d.fill(pacarc);
pac1y +=4;
d.setForeground(Color.yellow);
pacarc = new Arc(pac1x,pac1y,50,50,pacdwn2,pacdwnang2);
d.fill(pacarc);
d.setForeground(Color.black);
waitNSeconds(1);
d.fill(pacarc);
pac1y +=4;
d.setForeground(Color.yellow);
pacarc = new Arc(pac1x,pac1y,50,50,pacdwn3,pacdwnang3);
d.fill(pacarc);
d.setForeground(Color.black);
waitNSeconds(1);
d.fill(pacarc);
so for the first part i tried putting this into a method and running the program but where i had used the method the pacman shape just stayed still. any help please guys?
this is the code for the method i tried (this is just for thefirst state of the pacmans mouth while moving sideways)
public static void pacmve(int pactestx, int pactesty, int pacsizetest1, int pacsizetest2, int pacmouthtest, int pacangletest)
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d.fill(pacarc);
this is the loop i where i was trying to use the method
while (startmv++<stopmv)
pacmve(20,20,50,50,45,270);
Edited by: jeffsimmo85 on Nov 22, 2007 1:18 AM

When you post a code on a public forum, the code must be:
1)Properly formatted using code tags.
2)Generally compilable and runnable for us casual forum viewers.
3)Reproducible of your problems when we run it.

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public int[] getEmptyRooms (int doubleBeds, int singleBeds) {
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        int numEmpty = 0;
        for(int i = 0; i < theRooms.length; i++)
            if(!theRooms.isOccupied() && theRooms[i].hasRequiredBeds(doubleBeds, singleBeds))
numEmpty++;
int[] rooms = new int[numEmpty];
for(int i = 0; i < theRooms.length; i++)
if(!theRooms[i].isOccupied() && theRooms[i].hasRequiredBeds(doubleBeds, singleBeds))
i++
return rooms;
I really need to get this sorted out soon as i need to submit it tomorrow and i cant seem to see what is wrong (partially because im not great at java).
So any help what so ever will be greatly appreciated

The following is returned when i try and run the hotel appilcation
[l@e33af5
and that is when the following code is used
    public int[] getEmptyRooms (int doubleBeds, int singleBeds) {
        // Return an array of integers representing all of the unoccupied rooms
        // which has the required number of double and single beds. The length of
        // the resulting array is the same as the number of matching rooms
        // (which may be 0 if there are no rooms of the required size available).
        int numEmpty = 0;
        for(int i = 0; i < theRooms.length; i++)
            if(!theRooms.isOccupied() && theRooms[i].hasRequiredBeds(doubleBeds, singleBeds))
numEmpty++;
int[] rooms = new int[numEmpty];
int x = 0;
for(int i = 0; i < theRooms.length; i++)
if(!theRooms[i].isOccupied() && theRooms[i].hasRequiredBeds(doubleBeds, singleBeds))
rooms[x] = 0;
x++;
return rooms;

Help with the method copyPixels

Hello good day!
I need a force in a scheme that I am doing with a combobox that I created to select a font of a text. I would like to display the text to the source, but do not want to imply load all sources that I am offering 30, then a solution that I thought it would be feasible to use an image with these sources, then in that case all that needs to be done would be to carry this image that has about 30kb which would be a process not so slow.
For this did the following: I created the image in my library as a movie clip and then used two BitmapData and a bitmap to display the image as follows:
    var bmp: Bitmap;
    / / Lista_fonte is my image of the sources
    var list: = new lista_fonte lista_fonte ();
    / / Create a BitmapData from the list instantiated
    var bmd: BitmapData = new BitmapData (lista.width, lista.height, true);
    / / Create a BitmapData less for the item from combobox
    var bmdtemp: BitmapData = new BitmapData (lista.width, 20, true);
And then I go with a paragraph of the sources and use the copyPixels to copy part of the image:
    for (var i: int = 0; i <30; i) (
        bmdtemp.copyPixels (bmd, new Rectangle (0,0, lista.width, 20), new Point (0, 20 * i));
        bmp = new Bitmap (bmdtemp);
        addChild (bmp);
Above would look like this, but I have two problems:
1 The picture is transparent with the background and create the BitmapData I allow there is an overhead transparency, but the picture shows a white background!
2 are just copying the image at position 0.0 in the case is with any combo of the first source image only.
I hope that was clear, please help me now to break the head at a time on it and I read in some forums and some discusões around and nothing.

wannabehacker wrote:
But my actual question remained unanswered. Would you please take a look at the method if you have some time and explain to me how the method is converting the IP to decimal.
public class CharTest {
    public static void main(String[] args) {
        int b = '0';
        System.out.println(b);
}This prints out 48. What do you think the significance of that is, and what do you think would happen if I did
int c = '8' - '0';
System.out.println(c);

Help with itemStateChanged method

I have created an applet which diplays a combobox,three buton being play, stop and loop. The program runs but only plays the first two sound files and not the rest. I thin it has something to do with my itemStateChanged() method.
Any help id be very grateful......
Heres the programme
// Java Core Packages
import java.applet.Applet;
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
//Java extension packages
import javax.swing.*;
* Loads and Plays audio clips with
* the addition of a loop function
* @author L_Tambiah
* @version 01
public class LoadAudioAndPlay extends JApplet
private AudioClip sound1, sound2, sound3, sound4, sound5, sound6, currentSound;
private JButton playSound, loopSound, stopSound;
private JComboBox chooseSound;
//load the image when the applet begins executing
public void init()
Container container = getContentPane();
container.setLayout( new FlowLayout() );
String choices[] = { "Bottle", "Flute", "Space music", "Trippy",
"dandb", "garage"};
chooseSound = new JComboBox( choices );
chooseSound.addItemListener(
new ItemListener()
//stop sound and change to sound to users selection
public void itemStateChanged( ItemEvent e )
currentSound.stop();
currentSound = chooseSound.getSelectedIndex() == 0 ?
sound1 : sound5;
}// end anonymous inner class
);// end addItemListener method call
container.add( chooseSound );
//set up button event handler and buttons
ButtonHandler handler = new ButtonHandler();
playSound = new JButton( "Play" );
playSound.addActionListener( handler );
container.add( playSound );
loopSound = new JButton( "Loop" );
loopSound.addActionListener( handler );
container.add( loopSound );
stopSound = new JButton( "Stop" );
stopSound.addActionListener( handler );
container.add( stopSound );
//load sounds and set currentSound
sound1 = getAudioClip( getDocumentBase(), "bottle.wav" );
sound2 = getAudioClip( getDocumentBase(), "flute.aif" );
sound3 = getAudioClip( getDocumentBase(), "spacemusic.au" );
sound4 = getAudioClip( getDocumentBase(), "trippy.mid" );
sound5 = getAudioClip( getDocumentBase(), "dandb.wav" );
sound6 = getAudioClip( getDocumentBase(), "garage.wav" );
currentSound = sound1;
} //end method init
//stop the sound when the user switches web pages
public void stop()
currentSound.stop();
//private inner class to handle button events
private class ButtonHandler implements ActionListener {
//process play, loop and stop button events
public void actionPerformed( ActionEvent actionEvent )
if ( actionEvent.getSource() == playSound )
currentSound.play();
else if ( actionEvent.getSource() == loopSound )
currentSound.loop();
else if ( actionEvent.getSource() == stopSound )
currentSound.stop();
L.Tambiah
E0261830

AudioClip[] clips = {
    sound1, sound2, sound3, sound4, sound5, sound6
public void itemStateChanged(ItemEvent e) {
    if(e.getStateChange() == ItemEvent.SELECTED) {
      currentSound.stop();
      currentSound = clips[chooseSound.getSelectedIndex()];
} For more information:
http://java.sun.com/docs/books/tutorial/uiswing/events/itemlistener.html

Help with a method for battleships

Hi, I am doing a battleships applet, so far things are going well, except for the fact that I am using two methods of input for my ships, the first one is manual input, the user types in the textfields to place the ship, the second one is by using random number generators to place the ship and define if they are to be place horizontally and vertically. Here is my method for the PC placement. My question is how to write a method, which doesn`t allow the ships to overlap in any way?
{int a = (int) (Math.random()*2);
               rowindex[0] = 1 + (int) (Math.random() * 11);
               colindex[0] = 1 + (int) (Math.random() * 11);
               showship[1] = true;
               if(a==1){
               orientation[1] = true;
               for(int i = 0;i<bsholder.length;i++){
               bsholder[i] = (colindex[0]+i);
               System.out.println(bsholder);
               System.out.println();
               else {
               orientation[1] = false;
               for (int i=0; i<bsholder.length;i++){
               bsholder[i] = (rowindex[0]+i);
               System.out.println(bsholder[i]);
          System.out.println();
               int b = (int) (Math.random()*2);
               rowindex[1] = 1 + (int) (Math.random() * 12);
               colindex[1] = 1 + (int) (Math.random() * 12);
               showship[2] = true;
               if (b==1){
               orientation[2] = false;
               for (int i=0; i<cruisholder.length;i++){
               cruisholder[i] = (rowindex[1]+i);
               System.out.println(cruisholder[i]);
               System.out.println();
               else {
               orientation[2] = true;
               for (int i=0; i<cruisholder.length;i++){
               cruisholder[i] = (colindex[1]+i);
               System.out.println(cruisholder[i]);
               System.out.println();
               int c = (int) (Math.random()*2);
               rowindex[2] = 1 + (int) (Math.random() * 13);
               colindex[2] = 1 + (int) (Math.random() * 13);
               showship[3] = true;
               if (c==1)orientation[3] = true;
               else orientation[3] = false;
               rowindex[3] = 1 + (int) (Math.random() * 14);
               colindex[3] = 1 + (int) (Math.random() * 14);
               showship[4] = true;
rowindex and colindex are the arrays I use for the graphical representation of the ships on the board. orientation is a boolean array used to define the horizontal or vertical placement. bsholder and cruisholder are arrays to store the coordinates of the ships. I am currently not using one for 2square ship and 1square ship because this is just a test programm.I am using the System.out.println is not going to be included in the end version. Please help me, I ve been stuck on it for days. I have tried all sorts of for loops includen the "enchanced for" loop but still no luck. Many thanks in advance.

mpenoushliev wrote:
Wow, thanks a lot I will try it out, only one last question, should the holder for the ship (the array that has the location of the ship be a 2D array or could I use a standard array and combine that with either the row or col to track the ship. (That is what I am doing now). Once again thank you very much for the help.I wrote a battleship game a few weeks ago for fun, and I created a Board class that has a 2D array of Cells. The Cell class holds a reference to 1 ShipElement, which is a single piece of a whole Ship. The Ship class has a List of ShipElements, and is used to keep track of when whole ships are sunk, etc. The Board class is responsible for placing ships, and it iterates over the Cells. The Cell class has methods that tell you if it has a ShipElement or just Water, and you can use the size of the Board to check you haven't gone over the edge. Hope it helps!

Help with some methods !! Please..

Hi !!
My University teacher gave me an exercize where he askes to calculate the minimum,medium and maximum cubic capacities in an ArrayList<Cars> carList .
I didn't find problems to make a new method for searching the minum and maximum cubic capacities,but I could not think a way to make the method for the Average cubic capacity value.
For the min and max searches I wrote down :
public Car searchForMinCubicCapacityValue()
Car car= carList.get(0);
for(Car aCar : carList)
if(aCar.getCubicCapacity() <= car.getCubicCapacity())
minimumCar = aCar; (where minimumCar is an Instance Variable)
return minimumCar;
The same is for the method searchForMaxCubicCapacityValue() but I put >= indeed and I have used the Instance Variable maximumCar.
How could I write down the method searchForAverageCubicCapacityValue() ?
I really need your help please !...
I have to know for next week test ! In this test I'll have to write down a class with these same methods and others !
Thanks in advance !

Sorry ! I'll change the name of my 3 methods !
I would calculate by hand an average just adding up
the cubic capacities and then dividing the result of
this addition by the total number of cars.Right.
But I have tried to write down this one in the method
for an Average cubic capacity but I get the same
result of the maximum cubic capacity.Well, then the Java you wrote doesn't do what you described above. If you show the code, someone can help you find your error.
When you post code, please use[code] and [/code] tags as described in Formatting tips on the message entry page. (http://forum.java.sun.com/help.jspa?sec=formatting) It makes it much easier to read.
But I know that
there is an average value in my ArrayList !Of course there is. Any collection of values has an average.
I think this thing happens because the result of the
division is a number that doesn't exist in my
ArrayList.The average may very well not be a numbre in the list. If the list contains only 0 and 100, the average is 50, which is not in the list.

Need help with drawLine method

Hello,
I've been having trouble with a recent programming assignment and the prof isn't being very helpful. I need to call the drawLine method to plot a line between (0,0) and two coordinates entered by the user; is there a way to do this without a JPanel? Here are the specs:
I've already done Part 1., just posting it to give a complete representation of the assignment.
Part 1. Implement a ComplexNumber class to represent complex numbers (z = a + bi).
1) Instance variables:
private int real; /* real part */
private int imag; /* imaginary part */
2) Constructor:
public ComplexNumber ( int realVal, int imagVal )
{ /* initialize real to realVal and imag to imagVal */ }
3) Get/Set functions:
public int getReal ( )
{ /* returns the real part */ }
public int getImag ( )
{ /* returns the imaginary part */ }
public void setReal ( int realVal )
{ /* sets real to realVal */ }
public void setImag ( int imagVal )
{ /* sets imag to imagVal */ }
Part 2. Implement a ComplexNumberPlot class (with a main method) that gets complex
numbers from the user and plots them. The user will be prompted a complex number until
he/she enters 0. The numbers will be input from the keyboard (System.in) and displayed
in the plot as they are entered. Assume that the user will enter the numbers in blank
separated format. For example, if the user wants to enter three complex numbers: 3 + 4i,
5 + 12i, and 15 + 17i, the input sequence will be:
3 4
5 12
15 17
0 0
To plot a complex number, you need to draw a line between (0,0) and (real, imag) using
the drawLine method.
Name your classes as ComplexNumber and ComplexNumberPlot.
For simplicity, you can assume that the complex numbers input by the user fall
into the first quadrant of the complex plane, i.e. both real and imaginary values
are positive.
Thanks for any help!

Ok I've made some progress, here is what I've got.
public class ComplexNumber
private int real;
private int imag;
public ComplexNumber (int realVal, int imagVal)
real = realVal;
imag = imagVal;
public int getReal()
return real;
public int getImag()
return imag;
public void setReal(int realVal)
real = realVal;
public void setImag(int imagVal)
imag = imagVal;
import java.util.Scanner;
import java.awt.*;
import javax.swing.*;
public class ComplexNumberPlot
public static void main (String [] args)
ComplexNumber num = new ComplexNumber (1,0);
Scanner scan = new Scanner (System.in);
System.out.println("Enter a complex number(s):");
num.setReal(scan.nextInt());
num.setImag(scan.nextInt());
while (num.getReal() + num.getImag() != 0)
num.setReal(scan.nextInt());
num.setImag(scan.nextInt());
System.out.println();
JFrame frame = new JFrame ("ComplexNumberPlot");
frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
ComplexPanel panel = new ComplexPanel();
frame.getContentPane().add(panel);
frame.pack();
frame.setVisible(true);
class ComplexPanel extends JPanel
public ComplexPanel()
setPreferredSize (new Dimension(150,150));
public void PaintComponent (Graphics page)
super.paintComponent(page);
page.drawLine(0,0,100,100);
However
1) The JPanel pops up but no line is drawn.
2) I am not sure how to get the variables I'm scanning for to work in the drawLine method
Thanks for all your help so far.

Help with findByDateRange method in CMP enity bean

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