How to craete a list of a class
can any one tell me how to create a list of a class
Senmku wrote:
can any one tell me how to create a list of a classWhat exactly do you mean by that? Convert a class into a list, or create a list holding instances of a certain class?
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How to pass a list of parameters to a query?
Hi,
I use OracleXE 10 Database with JDeveloper 11g.
In my project I use a Toplink mapping to get access to the database (Toplink Object Map file). This mapping xml file is called crmMap.xml.
In the crmMap.xml file I define a mapping to a "User table" which has the four columns id (number), title (varchar2), firstName (varchar2) and lastName (varchar2). A title can have the four values Bachelor, Master, Doctor and Professor.
I do define a query in crmMap.xml which has to find all the users that have a special title. I do give the query one parameter called "title" which has the type "java.util.ArrayList". The parameter "title" is a list that has for example the two values "Bachelor" and "Doctor", if I want to find all the users that are Bachelor or Doctor. The query looks like this ...
Select * from User where title in(?title)I do use an EJB Session Bean to call the query. The code looks like this ...
public List<User> findUserByStatus() {
Session session = getSessionFactory().acquireSession();
Vector params = new Vector(1);
List stati = new ArrayList();
stati.add("Doctor");
stati.add("Bachelor");
params.add(stati);
List<User> result = (List<User>)session.executeQuery("findUserByStatus", User.class, params);
session.release();
return result;
}Doing this I get an error, in the line
List<User> result = (List<User>)session.executeQuery("findUserByStatus", User.class, params);while the app is trying to execute the query.
Part of my log
WARNING: ADFc: Invalid column type
java.sql.SQLException: Invalid column type
at oracle.jdbc.driver.SQLStateMapping.newSQLException(SQLStateMapping.java:70)
at oracle.jdbc.driver.DatabaseError.newSQLException(DatabaseError.java:116)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:177)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:233)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:407)
at oracle.jdbc.driver.OraclePreparedStatement.setObjectCritical(OraclePreparedStatement.java:7931)
at oracle.jdbc.driver.OraclePreparedStatement.setObjectInternal(OraclePreparedStatement.java:7511)
at oracle.jdbc.driver.OraclePreparedStatement.setObjectInternal(OraclePreparedStatement.java:8168)
at oracle.jdbc.driver.OraclePreparedStatement.setObject(OraclePreparedStatement.java:8149)
at oracle.jdbc.driver.OraclePreparedStatementWrapper.setObject(OraclePreparedStatementWrapper.java:229)
at oracle.toplink.internal.databaseaccess.DatabasePlatform.setPrimitiveParameterValue(DatabasePlatform.java:1694)
at oracle.toplink.internal.databaseaccess.DatabasePlatform.setParameterValueInDatabaseCall(DatabasePlatform.java:1684)
at oracle.toplink.platform.database.oracle.Oracle9Platform.setParameterValueInDatabaseCall(Oracle9Platform.java:339)
at oracle.toplink.internal.databaseaccess.DatabasePlatform.setParameterValuesInDatabaseCall(DatabasePlatform.java:1669)
at oracle.toplink.internal.databaseaccess.DatabaseCall.prepareStatement(DatabaseCall.java:649)
at oracle.toplink.internal.databaseaccess.DatabaseAccessor.basicExecuteCall(DatabaseAccessor.java:517)
at oracle.toplink.internal.databaseaccess.DatabaseAccessor.executeCall(DatabaseAccessor.java:467)
at oracle.toplink.threetier.ServerSession.executeCall(ServerSession.java:447)
at oracle.toplink.internal.queryframework.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:193)
at oracle.toplink.internal.queryframework.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:179)
at oracle.toplink.internal.queryframework.DatasourceCallQueryMechanism.executeSelectCall(DatasourceCallQueryMechanism.java:250)
at oracle.toplink.internal.queryframework.DatasourceCallQueryMechanism.selectAllRows(DatasourceCallQueryMechanism.java:583)
at oracle.toplink.queryframework.ReadAllQuery.executeObjectLevelReadQuery(ReadAllQuery.java:467)
at oracle.toplink.queryframework.ObjectLevelReadQuery.executeDatabaseQuery(ObjectLevelReadQuery.java:874)
at oracle.toplink.queryframework.DatabaseQuery.execute(DatabaseQuery.java:674)
at oracle.toplink.queryframework.ObjectLevelReadQuery.execute(ObjectLevelReadQuery.java:835)
at oracle.toplink.queryframework.ReadAllQuery.execute(ReadAllQuery.java:445)
at oracle.toplink.internal.sessions.AbstractSession.internalExecuteQuery(AbstractSession.java:2260)
at oracle.toplink.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1074)
at oracle.toplink.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1058)
at oracle.toplink.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1032)
at oracle.toplink.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:945)
at de.virtual7.crmTL.model.crmFacadeBean.findUserByStatus(crmFacadeBean.java:720)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.bea.core.repackaged.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:281)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:187)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:154)
at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:126)
at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:114)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:176)
at com.bea.core.repackaged.springframework.jee.spi.MethodInvocationVisitorImpl.visit(MethodInvocationVisitorImpl.java:15)
at weblogic.ejb.container.injection.EnvironmentInterceptorCallbackImpl.callback(EnvironmentInterceptorCallbackImpl.java:54)
at com.bea.core.repackaged.springframework.jee.spi.EnvironmentInterceptor.invoke(EnvironmentInterceptor.java:30)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:176)
at com.bea.core.repackaged.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:176)
at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:126)
at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:114)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:176)
at com.bea.core.repackaged.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:210)
at $Proxy90.findUserByStatus(Unknown Source)
at de.virtual7.crmTL.model.crmFacade_etlagg_crmFacadeLocalImpl.findUserByStatus(crmFacade_etlagg_crmFacadeLocalImpl.java:838)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at oracle.adf.model.binding.DCInvokeMethod.invokeMethod(DCInvokeMethod.java:563)
at oracle.adf.model.binding.DCDataControl.invokeMethod(DCDataControl.java:2119)
at oracle.adf.model.bc4j.DCJboDataControl.invokeMethod(DCJboDataControl.java:2929)
at oracle.adf.model.bean.DCBeanDataControl.invokeMethod(DCBeanDataControl.java:396)
at oracle.adf.model.binding.DCInvokeMethod.callMethod(DCInvokeMethod.java:258)
at oracle.jbo.uicli.binding.JUCtrlActionBinding.doIt(JUCtrlActionBinding.java:1441)
at oracle.adf.model.binding.DCDataControl.invokeOperation(DCDataControl.java:2126)
at oracle.adf.model.bean.DCBeanDataControl.invokeOperation(DCBeanDataControl.java:414)
at oracle.adf.model.adapter.AdapterDCService.invokeOperation(AdapterDCService.java:311)
at oracle.jbo.uicli.binding.JUCtrlActionBinding.invoke(JUCtrlActionBinding.java:697)
at oracle.adf.model.binding.DCInvokeAction.refreshInternal(DCInvokeAction.java:46)
at oracle.adf.model.binding.DCInvokeAction.refresh(DCInvokeAction.java:32)
at oracle.adf.model.binding.DCBindingContainer.internalRefreshControl(DCBindingContainer.java:2970)
at oracle.adf.model.binding.DCBindingContainer.refresh(DCBindingContainer.java:2639)
at oracle.adf.controller.v2.lifecycle.PageLifecycleImpl.prepareModel(PageLifecycleImpl.java:110)
at oracle.adf.controller.faces.lifecycle.FacesPageLifecycle.prepareModel(FacesPageLifecycle.java:77)
at oracle.adf.controller.v2.lifecycle.Lifecycle$2.execute(Lifecycle.java:135)
at oracle.adfinternal.controller.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:190)
at oracle.adfinternal.controller.faces.lifecycle.ADFPhaseListener.mav$executePhase(ADFPhaseListener.java:19)
at oracle.adfinternal.controller.faces.lifecycle.ADFPhaseListener$PhaseInvokerImpl.startPageLifecycle(ADFPhaseListener.java:229)
at oracle.adfinternal.controller.faces.lifecycle.ADFPhaseListener$1.after(ADFPhaseListener.java:265)
at oracle.adfinternal.controller.faces.lifecycle.ADFPhaseListener.afterPhase(ADFPhaseListener.java:69)
at oracle.adfinternal.controller.faces.lifecycle.ADFLifecyclePhaseListener.afterPhase(ADFLifecyclePhaseListener.java:51)
at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._executePhase(LifecycleImpl.java:354)
at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:175)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
at oracle.adf.model.servlet.ADFBindingFilter.doFilter(ADFBindingFilter.java:181)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
at oracle.adfinternal.view.faces.webapp.rich.RegistrationFilter.doFilter(RegistrationFilter.java:85)
at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:279)
at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._invokeDoFilter(TrinidadFilterImpl.java:239)
at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:196)
at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:139)
at org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
at oracle.security.jps.wls.JpsWlsFilter$1.run(JpsWlsFilter.java:85)
at java.security.AccessController.doPrivileged(Native Method)
at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:257)
at oracle.security.jps.wls.JpsWlsSubjectResolver.runJaasMode(JpsWlsSubjectResolver.java:250)
at oracle.security.jps.wls.JpsWlsFilter.doFilter(JpsWlsFilter.java:100)
at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:65)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3496)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(Unknown Source)
at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2180)
at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2086)
at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1406)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)
07.09.2009 11:50:16 oracle.adf.controller.faces.lifecycle.FacesPageLifecycle addMessage
WARNUNG: ADFc: EJB Exception: : Lokaler Exception Stack:
Exception [TOPLINK-4002] (Oracle TopLink - 11g (11.1.1.0.1) (Build 081030)): oracle.toplink.exceptions.DatabaseException
Interne Exception: java.sql.SQLException: Ungültiger Spaltentyp
Fehlercode:17004
Aufruf:Select * from User where title in(?title)
bind => [[Doctor,Bachelor]]Does anyone know a way how to pass a list of parameters
Thanks BodhyHi,
One alternative way is to create String with , sepearted as pass the string to in clause.For example ,create a string ('Bachelor','Doctor') and pass this string to in clause.
Session session = getSessionFactory().acquireSession();
String params=( 'Bachelor','Doctor);
List<User> result = (List<User>)session.executeQuery("findUserByStatus", User.class, params);
session.release();
This is an alternative way and workaround which can work for Strings .
Or you can use EXpression to build the query to pass the collection as example given below.
Expression addressExpression;
ReadObjectQuery query = new ReadObjectQuery(Employee.class);
ExpressionBuilder emp = query.getExpressionBuilder();
addressExpression =
emp.get("address").get("city").equal(
emp.getParameter("employee").get("address").get("city"));
query.setName("findByCity");
query.setSelectionCriteria(addressExpression);
query.addArgument("employee");
Vector v = new Vector();
v.addElement(employee);
Employee e = (Employee) session.executeQuery(query, v);
Hope this helps.
Regards,
Vinay Kumar -
How to keep the list to show max.of 3 items at a time
i had a list, the rows are dynamically generated, the problem comes with when the item are more than 3. the 4th one is half visible which looks odd. i want to see 3 rows at a time, how is this possible. i set rowCount, variablerowheight it didn't work.
thanks for reading.package Components{
public
public
class AdvancedLegendList extends List{
public function AdvancedLegendList(){
super();}
override protected function measure():void
if(this.height>3)
this.height=measureHeightOfItems(-1,1);}
and set the list as
<Components:AdvancedLegendList id="itemList"dataProvider="{_incentivesCopy}borderVisible="false" width="295"rowCount="
{Math.min(DataContext.Incentives.length, 3)}"variableRowHeight="true"selectable="
false"verticalScrollBarStyleName="sbTrackStyle" paddingRight="1"
<Components:itemRenderer> <fx:Component>
if i have override the measure() function in script, i dont know how to access this list. -
How to Get a list of pending deferred tasks
Hi all
there is a bunch of unfinished threads here asking how to get a list/report of deferred tasks that are associated with user objects and scheduled for future execution.
I need this list and I can't find out how to get it anyway.
I don't care if it's a SJSIM report, a database query or a SJSIM log mining exercise.
Does anyone know how to do this?
My org has just gone live with SJSIM and I want to report on the number of legacy resource accounts that have had deferred tasks created against them for future disabling/deletion (our consultants added this workflow based on rules with an email warning, a disabling deferred task set for 2 weeks from now and a deleting deferred task for 6 months after that). Hopefully I can say "look, 5,000 legacy accounts are going to be cleaned up!
Thanks in advanceYou can do it with a custom workflow, something like this:
<Activity>
<Action id='0' class='com.waveset.session.WorkflowServices'>
<Argument name='op' value='queryObjectNames'/>
<Argument name='type' value='User'/>
<Argument name='attributes'>
<list>
<new class='com.waveset.object.AttributeCondition'>
<s>deferredTaskDate</s>
<s>isPresent</s>
</new>
</list>
</Argument>
<Action id='1' process='Check User'>
<Iterate for='currentUser' in='queryResult'/>
<Argument name='accountId' value='$(currentUser)'/>
</Action>
</Activity>And:
<WFProcess name='Check User'>
<Variable name='accountId' input='true'/>
<Activity id='0' name='start'>
<Transition to='Check User'/>
</Activity>
<Activity id='1' name='Check User' hidden='true'>
<Action id='1' name='Get User View' application='com.waveset.session.WorkflowServices'>
<Argument name='op' value='getView'/>
<Argument name='type' value='User'/>
<Argument name='id' value='$(accountId)'/>
<Argument name='authorized' value='true'/>
</Action>
<Transition to='Got One'>
<notnull>
<ref>view.accounts[Lighthouse].properties.tasks[Legacy Cleanup].date<ref>
</notnull>
</Transition>
<Transition to='end'/>
</Activity>
<Activity id='2 name='Got One'>
<ActionResult name='users' type='message' overwrite='false'>
<ref>accountId</ref>
</ActionResult>
</Action>
<Transition to='end'/>
</Activity>
</WFProcess>This just gives a rough idea of how it can be done. It might be best to bring your consultants back in to implement this.
Edited by: PaulHilchey on Feb 25, 2009 10:35 AM -
How to get the list of component?
How to get the list of component through java API in Adobe CQ5?
There are probably more than a few ways, but here is a little component .jsp code that uses the jcr query api to pull out all the components and list them on a page. If I know CQ, there might be a way to ask for a list of components another way though, maybe through another API, or possibly a .json url, I might remember reading something about that, somewhere, lol, but this at least gets you the list in a somewhat simple way.
Code Example:
<%@include file="/apps/psul/components/global.jsp"%>
<%@ page import="javax.jcr.*,
javax.jcr.query.*"
%>
<%
// Login to create an anonymous session on the default workspace
Session session = resourceResolver.adaptTo(Session.class);
//Declare a query for all the components in the system
String SQL = "select * from cq:Component";
//side note: if you want just the components in your site area, then make the query more like below...
// SQL = "select * from cq:Component where jcr:path like '/apps/yoursitename/%'";
QueryManager qm = session.getWorkspace().getQueryManager();
Query query = qm.createQuery(SQL, Query.SQL);
QueryResult result = query.execute();
NodeIterator nodes = result.getNodes();
while (nodes.hasNext()) {
Node node = (Node)nodes.next();
%>
<p><%=node.getName() %> (<b><%=node.getPath() %></b>)</p>
<% } %> -
Hello all,
I have a question about printing a list on my JSP. I create a list with a tree like view. I have done this and when I do System.out.println() on my class where I run the sql statement, he shows the actual list. But now I most post this throw my servlet on to my JSP. But I can't figure out how this must be done.
My code for the class is:
public static List Maaktree(int Parent, int level) {
Connectie Dbc = Connectie.getInstance();
List Tree = new LinkedList();
Mappen mappen = new Mappen();
ResultSet rs;
String Query = "select * from Mappen where Parent ='"+Parent+"'";
rs = Dbc.execQuery(Query);
try {
while (rs.next()) {
System.out.println(level + "|" + rs.getString("Mapnaam"));
Tree.add(Maaktree(rs.getInt("Map_id"),(1+level)));
catch (Exception e) {
e.printStackTrace();
return Tree;
}on my servlet I do the next
int Parent = 0;
List Tree = Mapmutaties.Maaktree(Parent, 1);
request.setAttribute("Tree", Tree);
RequestDispatcher ReqD = getServletContext().getRequestDispatcher(
"/Tree.jsp");
if (ReqD != null)
ReqD.forward(request, response);And on my JSP I do like this
<%
java.util.ListIterator pos = null;
java.util.LinkedList Tree = (java.util.LinkedList)request.getAttribute("Tree");
if (Tree != null) pos = Tree.listIterator(0);
%>
<html>
<head>
<title>
</title>
</head>
<body bgcolor="#ffffff">
<b>Mapnaam</b>
<%
if (pos != null)
while(pos.hasNext())
Business.Mappen mappen = (Business.Mappen)pos.next();
%>
<%=mappen.getMapnaam()%>
<%
%>
</body>
</html>But this gives an error. I suspect on the line "Business.Mappen mappen = (Business.Mappen)pos.next();". Because when I remove this line there is no problem. But I can't get the list shown on my JSP.
Does anyone know how to print the list on my JSP.
Thanx,
Henkand what is your error exactly? have you got a stack trace?
-
Accessing an Array List from another class
Hi, I was a member on here before, but I forgot my password and my security question is wrong.
My question is how do I access a private arraylist from a different class in the same package?
What I am trying to do is the following (hard to explain).
Make a picking client for a shop, so that when an order is recieved, the picker can click on the orders button, and view all of the current orders that have not been completed. This Pick client has its own user interface, in a seperate class from where the BoughtList array is created, in the cashier client. The boughtlist is created when the cashier puts in the product number into the cashier client and clicks buy. I seem to be having trouble accessing the list from another class. Once the order is completed the cashier clicks bought and the list is reset. There is another class in a different pagage that processes some of the functions of the order, eg newOrder().
Yes it is for Uni so I dont need / want the full answers, jist something to get started. Also please dont flame me, I have done many other parts of this project, just having trouble getting started on this one.
Here is the code for the cashier client. The code for the Pick client is almost the same, I just need to make the code that displays the orders.
package Clients;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.text.NumberFormat;
import java.util.Locale;
import Catalogue.*;
import DBAccess.*;
import Processing.*;
import Middle.*;
class CashierGUI
class STATE // Cashier states
public static final int PROCESS = 0;
public static final int CHECKED = 1;
class NAME // Names of buttons
public static final String CHECK = "Check";
public static final String BUY = "Buy";
public static final String CANCEL = "Cancel";
public static final String BOUGHT = "Bought";
private static final int H = 300; // Height of window pixels
private static final int W = 400; // Width of window pixels
private JLabel theAction = new JLabel();
private JTextField theInput = new JTextField();
private JTextArea theOutput = new JTextArea();
private JScrollPane theSP = new JScrollPane();
private JButton theBtCheck = new JButton( NAME.CHECK );
private JButton theBtBuy = new JButton( NAME.BUY );
private JButton theBtCancel= new JButton( NAME.CANCEL );
private JButton theBtBought= new JButton( NAME.BOUGHT );
private int theState = STATE.PROCESS; // Current state
private Product theProduct = null; // Current product
private BoughtList theBought = null; // Bought items
private Transaction theCB = new Transaction();
private StockReadWriter theStock = null;
private OrderProcessing theOrder = null;
private NumberFormat theMoney =
NumberFormat.getCurrencyInstance( Locale.UK );
public CashierGUI( RootPaneContainer rpc, MiddleFactory mf )
try //
theStock = mf.getNewStockReadWriter(); // DataBase access
theOrder = mf.getNewOrderProcessing(); // Process order
} catch ( Exception e )
System.out.println("Exception: " + e.getMessage() );
Container cp = rpc.getContentPane(); // Content Pane
Container rootWindow = (Container) rpc; // Root Window
cp.setLayout(null); // No layout manager
rootWindow.setSize( W, H ); // Size of Window
Font f = new Font("Monospaced",Font.PLAIN,12); // Font f is
theBtCheck.setBounds( 16, 25+60*0, 80, 40 ); // Check Button
theBtCheck.addActionListener( theCB ); // Listener
cp.add( theBtCheck ); // Add to canvas
theBtBuy.setBounds( 16, 25+60*1, 80, 40 ); // Buy button
theBtBuy.addActionListener( theCB ); // Listener
cp.add( theBtBuy ); // Add to canvas
theBtCancel.setBounds( 16, 25+60*2, 80, 40 ); // Cancel Button
theBtCancel.addActionListener( theCB ); // Listener
cp.add( theBtCancel ); // Add to canvas
theBtBought.setBounds( 16, 25+60*3, 80, 40 ); // Clear Button
theBtBought.addActionListener( theCB ); // Listener
cp.add( theBtBought ); // Add to canvas
theAction.setBounds( 110, 25 , 270, 20 ); // Message area
theAction.setText( "" ); // Blank
cp.add( theAction ); // Add to canvas
theInput.setBounds( 110, 50, 270, 40 ); // Input Area
theInput.setText(""); // Blank
cp.add( theInput ); // Add to canvas
theSP.setBounds( 110, 100, 270, 160 ); // Scrolling pane
theOutput.setText( "" ); // Blank
theOutput.setFont( f ); // Uses font
cp.add( theSP ); // Add to canvas
theSP.getViewport().add( theOutput ); // In TextArea
rootWindow.setVisible( true ); // Make visible
class Transaction implements ActionListener // Listener
public void actionPerformed( ActionEvent ae ) // Interaction
if ( theStock == null )
theAction.setText("No conection");
return; // No connection
String actionIs = ae.getActionCommand(); // Button
try
if ( theBought == null )
int on = theOrder.uniqueNumber(); // Unique order no.
theBought = new BoughtList( on ); // Bought list
if ( actionIs.equals( NAME.CHECK ) ) // Button CHECK
theState = STATE.PROCESS; // State process
String pn = theInput.getText().trim(); // Product no.
int amount = 1; // & quantity
if ( theStock.exists( pn ) ) // Stock Exists?
{ // T
Product pr = theStock.getDetails(pn); // Get details
if ( pr.getQuantity() >= amount ) // In stock?
{ // T
theAction.setText( // Display
pr.getDescription() + " : " + // description
theMoney.format(pr.getPrice()) + // price
" (" + pr.getQuantity() + ")" // quantity
); // of product
theProduct = pr; // Remember prod.
theProduct.setQuantity( amount ); // & quantity
theState = STATE.CHECKED; // OK await BUY
} else { // F
theAction.setText( // Not in Stock
pr.getDescription() +" not in stock"
} else { // F Stock exists
theAction.setText( // Unknown
"Unknown product number " + pn // product no.
if ( actionIs.equals( NAME.BUY ) ) // Button BUY
if ( theState != STATE.CHECKED ) // Not checked
{ // with customer
theAction.setText("Check if OK with customer first");
return;
boolean stockBought = // Buy
theStock.buyStock( // however
theProduct.getProductNo(), // may fail
theProduct.getQuantity() ); //
if ( stockBought ) // Stock bought
{ // T
theBought.add( theProduct ); // Add to bought
theOutput.setText( "" ); // clear
theOutput.append( theBought.details()); // Display
theAction.setText("Purchased " + // details
theProduct.getDescription()); //
// theInput.setText( "" );
} else { // F
theAction.setText("!!! Not in stock"); // Now no stock
theState = STATE.PROCESS; // All Done
if ( actionIs.equals( NAME.CANCEL ) ) // Button CANCEL
if ( theBought.number() >= 1 ) // item to cancel
{ // T
Product dt = theBought.remove(); // Remove from list
theStock.addStock( dt.getProductNo(), // Re-stock
dt.getQuantity() ); // as not sold
theAction.setText(""); //
theOutput.setText(theBought.details()); // display sales
} else { // F
theOutput.setText( "" ); // Clear
theState = STATE.PROCESS;
if ( actionIs.equals( NAME.BOUGHT ) ) // Button Bought
if ( theBought.number() >= 1 ) // items > 1
{ // T
theOrder.newOrder( theBought ); // Process order
theBought = null; // reset
theOutput.setText( "" ); // Clear
theInput.setText( "" ); //
theAction.setText( "Next customer" ); // New Customer
theState = STATE.PROCESS; // All Done
theInput.requestFocus(); // theInput has Focus
catch ( StockException e ) // Error
{ // Of course
theOutput.append( "Fail Stock access:" + // Should not
e.getMessage() + "\n" ); // happen
catch ( OrderException e ) // Error
{ // Of course
theOutput.append( "Fail Order process:" + // Should not
e.getMessage() + "\n" ); // happen
}(disclaimer: I did not read through your Swing code, as I find that painful)
My question is how do I access a private arraylist from a different class in the same
package?Provide a public accessor method (getMyPrivateArrayList()) -
How to use the List in this case.
I got sample code from http://developer.java.sun.com/developer/technicalArticles/ThirdParty/WebCrawler/. But when I compiled it, there was error message like "webcrawler.java:16: reference to List is ambiguous, both class java.util.List in java.util and class java.awt.List in java.awt match List listMatches; "
I think it might be because it was written by JDK1.1.3. I am using JDK1.4 to compile it. Can any body tell me how to make it can be compiled by JDK1.4?
Thanks a lot.Hi olivia16
There is an interface called java.util.List and a class java.util.List :-)
To correct source code just put java.util. prefix at lines 16 and 76:
java.awt.List listMatches; // 16
listMatches = new java.awt.List(10); // 76
Regards. -
How to sort a list of strings, without methods and stuff just simple code?
Hi
How to sort a list of strings, without methods and stuff just simple code?
Thanks in adavance!!Without methods? How are you going to all the sort code? What is the point of code?
Collections.sort(List) will sort strings or anything that implements the Comparable interface, or you can use the sort method that takes a Comparator implemenation.
If you want "just code", you could either get the Collections class souce and follow it to the code. But otherwise, there isn't one set of code. There are various sorting algorithms with advantages and disadvantages. Maybe you'd be better off searching for sorting algorithms and if you understand them, it should be simple to write Java implementations of them. -
How-to create dependent list boxes in a table -Frank Sample
hi everyone i would like to ask a suggestion about Frank's example on How-to create dependent list boxes in a table -Frank Sample ...
i want to extend this example for 3 dependent lists... including locations, departaments and employes....
this the ListboxBean java that Frank is using in his example.... and this is only for locations and departaments tables and it works ok... i want to add the third list for employers wich is dependent only from departaments list.... as i am not good in java i would like to ask u a suggestion on how to develop the third list in this java class ...
public class ListboxBean {
private SelectItem[] locationsSelectItems = null;
private SelectItem[] departmentsSelectItems = null;
public SelectItem[] getLocationsSelectItems() {
if (locationsSelectItems == null){
FacesContext fctx = FacesContext.getCurrentInstance();
ValueBinding vbinding = fctx.getApplication().createValueBinding("#{bindings.LocationsView1Iterator}");
DCIteratorBinding locationsIterBinding = (DCIteratorBinding) vbinding.getValue(fctx);
locationsIterBinding.executeQuery();
Row[] locRowsArray = locationsIterBinding.getAllRowsInRange();
// define select items
locationsSelectItems = new SelectItem[locRowsArray.length];
for (int indx = 0; indx < locRowsArray.length; indx++) {
SelectItem addItem = new SelectItem();
addItem.setLabel((String)locRowsArray[indx].getAttribute("City"));
addItem.setValue(locRowsArray[indx].getAttribute("LocationId"));
locationsSelectItems[indx] = addItem;
return locationsSelectItems;
return locationsSelectItems;
public SelectItem[] getDepartmentsSelectItems() {
FacesContext fctx = FacesContext.getCurrentInstance();
ValueBinding vbinding = fctx.getApplication().createValueBinding("#{row}");
JUCtrlValueBindingRef rwJUCtrlValueBinding = (JUCtrlValueBindingRef) vbinding.getValue(fctx);
Row rw = rwJUCtrlValueBinding.getRow();
if (rw.getAttribute(6) != null){
OperationBinding oBinding = (OperationBinding) fctx.getApplication().createValueBinding("#{bindings.ExecuteWithParams}").getValue(fctx);
oBinding.getParamsMap().put("locId",rw.getAttribute(6).toString());
oBinding.execute();
ValueBinding vbinding2 = fctx.getApplication().createValueBinding("#{bindings.DepartmentsView2Iterator}");
DCIteratorBinding departmentsIterBinding = (DCIteratorBinding) vbinding2.getValue(fctx);
departmentsIterBinding.executeQuery();
Row[] depRowsArray = departmentsIterBinding.getAllRowsInRange();
// define select items
departmentsSelectItems = new SelectItem[depRowsArray.length];
for (int indx = 0; indx < depRowsArray.length; indx++) {
SelectItem addItem = new SelectItem();
addItem.setLabel((String)depRowsArray[indx].getAttribute("DepartmentName"));
addItem.setValue(depRowsArray[indx].getAttribute("DepartmentId"));
departmentsSelectItems[indx] = addItem;
return departmentsSelectItems;
public void setLocationsSelectItems(SelectItem[] locationsSelectItems) {
this.locationsSelectItems = locationsSelectItems;
public void setDepartmentsSelectItems(SelectItem[] departmentsSelectItems) {
this.departmentsSelectItems = departmentsSelectItems;
Thanks in advance :0Hi,
I think that all you need to do is to look at how I implemented the dependent detail for querying the Employees select items
Then you make sure the DepartmentsVO and the EmployeesVO have bind variable to query them according to the pre-selected value in their respective master list
Frank -
Sorting a list of different class objects
Hi All ,
How to sort a List a.which contains objects of different Classes, b. objects of same class . Is it possible to sort these by implementing Comparable interface .
Thanks ,
Rajesh Reddyrajeshreddyk wrote:
Hi All ,
How to sort a List a.which contains objects of different Classes, b. objects of same class . Is it possible to sort these by implementing Comparable interface .Well, if objects of different classes are kept in the same List and you want to sort them together they at least have that in common. They're Comparable-able. -:) To manifest that the different classes could all implement a Comparableable interface (or maybe Intercomparable would be a better choise of name.) -
Hi m assignment is to create a linked list implementation..
so far i have this..
public class Set<Value> {
Value Element;
Set<Value> next;
Set(Value data)
Element=data;
next=null;
Set(Value data, Set n)
Element = data;
next = n;
public interface MySet<Value> {
boolean isIn(Value v);
void add(Value v);
void remove(Value v);
MySet union(MySet s);
MySet intersect(MySet s);
MySet difference(MySet s);
int size();
void printSet();
public class MyLLSet<Value> implements MySet<Value>{
private Set<Value> head;
public MyLLSet(){
head=new Set(null);
public boolean isIn(Value v){
Set<Value> p;
p=head;
boolean flag=false;
while(p.next!=null){
p=p.next;
if(p.Element==v){
flag=true;
return flag;
public void add(Value v){
Set<Value> p;
Set<Value> q;
p=head;
q=head.next;
while(p.next!=null){
p=p.next;
q=q.next;
p.next=new Set(v,q);
public void remove(Value v){
Set<Value> p;
Set<Value> q;
p=head;
q=head.next;
while(p.next!=null){
p=p.next;
q=q.next;
if(p.Element==v){
p.next=p.next.next;
q.next=null;
break;
public MySet union(MyLLSet s){
Set<Value> p;
Set<Value> q;
p=s.head;
q=this.head;
while(p.next!=null){
p=p.next;
p=q.next;
s.head.next=null;
RETURN ???
}However in my union method i cant figure out what to return.. i am sure that the method creates a union of two lists.. but how do i return the final unionized list.... ( i am new to programming so sorry if i dont make sense)
Edited by: haramino1 on Mar 22, 2009 1:31 PMHave some patience! You can't expect an answer in 10 minutes.
Your original post looked like you wanted to make an implementation of a linked list, using a set as the underlying code (which doesn't make a lot of sense). However, your real assignment, as you stated later, is to make an implementation of a set, with a linked list as the underlying code.
In your original post, your Set<Value> doesn't make sense to be your Set class. It does make sense to have that code as your linked list's "node" class. So, rename it from Set<Value> to Node<Value>. Everywhere in that class that says "Set" should say "Node". It will only confuse you more if you call it "Set" when it is not a "Set" (it surely confused me!). Also, "Element" should be lowercase "element" (to follow standard naming conventions).
You want to make a linked list class that implements everything in the MySet<Value> interface. So, your MyLLSet<Value> should have all of those methods. Your MyLLSet should have one variable (which you have, but you call it Set<Value>, it should be Node<Value>).
private Node<Value> head;Your MyLLSet constructor probably shouldn't set head to a new Node with a null value (otherwise, your Set will always include a null member). The MyLLSet constructor probably doesn't need to do anything, so you can just remove that whole constructor and let the compiler generate its standard no-argument constructor.
When comparing values for equality in isIn, you probably want to use .equals, not ==:
if (p.element == v) // WRONGshould be:
if (p.element.equals(v)) // CORRECTOtherwise, you are only comparing reference values, not the data they point to. So, for instance, if Value was a String, you wouldn't be able to write code that asked the user for a String value to test if the String was in the Set--I don't think you'd ever be able to get "true" for the answer.
In isIn, your test should not be p.next != null --it should be "p != null". Otherwise, if p is null, you will get a NullPointerException trying to get "next". You want:
while (p != null) {
// Test p.element for equality to v.
// If equal, you can break out of the 'for' loop.
// Set p to p.next.
}Similarly in other methods, you need to check p != null . Your 'add' method is wrong--you didn't check duplicates, for one thing. Your loop isn't right, either. -
How can we use list box on selection screen
hi, howe can we use list box on selection screen and how can we populate the dat ainto the list box and how can we retrive data based on list box from ther database.
thanks in advance
rajuUse the VRM_SET_VALUES function module.
DATA: list TYPE vrm_values,
value LIKE LINE OF list.
AT SELECTION SCREEN OUTPUT
AT SELECTION-SCREEN OUTPUT.
name = 'P_OBJECT'.
CLEAR list.
REFRESH list.
CLEAR value.
value-key = '1'.
value-text = 'Development Class'.
APPEND value TO list.
CLEAR value.
value-key = '2'.
value-text = 'Program'.
APPEND value TO list.
CLEAR value.
value-key = '3'.
value-text = 'Function Module'.
APPEND value TO list.
CLEAR value.
value-key = '4'.
value-text = 'Database Table'.
APPEND value TO list.
CLEAR value.
value-key = '5'.
value-text = 'Structure'.
APPEND value TO list.
CLEAR value.
value-key = '6'.
value-text = 'View'.
APPEND value TO list.
CLEAR value.
value-key = '7'.
value-text = 'Data Element'.
APPEND value TO list.
CLEAR value.
value-key = '8'.
value-text = 'Table Type'.
APPEND value TO list.
CLEAR value.
value-key = '9'.
value-text = 'Class / Interface'.
APPEND value TO list.
CLEAR value.
value-key = '10'.
value-text = 'Type Group'.
APPEND value TO list.
CLEAR value.
value-key = '11'.
value-text = 'Domain'.
APPEND value TO list.
CLEAR value.
value-key = '12'.
value-text = 'Search Help'.
APPEND value TO list.
CLEAR value.
value-key = '13'.
value-text = 'Lock Object'.
APPEND value TO list.
CALL FUNCTION 'VRM_SET_VALUES'
EXPORTING
id = name
values = list
EXCEPTIONS
id_illegal_name = 1
OTHERS = 2.
IF sy-subrc <> 0.
MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
ENDIF.
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