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  • JDBC Null pointer Exception thrown

    - by harigm
    Hi I'm getting nullpointerexception at rs.next() or rs.getString(1) it is really weird that sometimes rs.next() works fine and it throws nullpointerexception at rs.getString("PRODUCTCODE"),sometimes it throws npe at rs.getString("PRODDATE") i dont understand why rs.getString() thows npe while rs.next() works fine Here is my code { ResultSet rs = null; String query = ""; BarcodeBean bi = null; try { query = "SELECT * FROM TABLE(GET_BARCODEINFO('"barcode.trim()"'))"; statement = connection.createStatement(); Logger.getInstance().getLogger().logInfo(query); rs = statement.executeQuery(query); bi = new BarcodeBean(); if (rs == null){ if(rs.next()){ bi.setUrunKodu(rs.getString("PRODUCTCODE")); bi.setImalatMakineKodu(rs.getString("PRODMACHINECODE")); bi.setOperatorSicilNo(rs.getString("OPERATORID")); bi.setImalatTarihi(rs.getString("PRODDATE")); bi.setImalatVardiyasi(rs.getString("PRODSHIFT")); bi.setSeriNumarasi(rs.getString("SERIALNUMBER")); bi.setSirtTarihi(rs.getString("SIRTTARIHI")); } } } catch (SQLException e) { e.printStackTrace(); throw e; } catch (Exception e) { e.printStackTrace(); } finally { DatabaseUtility.close(rs); DatabaseUtility.close(statement); } }

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  • Help with malloc and free: Glibc detected: free(): invalid pointer

    - by nunos
    I need help with debugging this piece of code. I know the problem is in malloc and free but can't find exactly where, why and how to fix it. Please don't answer: "Use gdb" and that's it. I would use gdb to debug it, but I still don't know much about it and am still learning it, and would like to have, in the meanwhile, another solution. Thanks. #include <stdio.h> #include <stdlib.h> #include <ctype.h> #include <unistd.h> #include <string.h> #include <sys/wait.h> #include <sys/types.h> #define MAX_COMMAND_LENGTH 256 #define MAX_ARGS_NUMBER 128 #define MAX_HISTORY_NUMBER 100 #define PROMPT ">>> " int num_elems; typedef enum {false, true} bool; typedef struct { char **arg; char *infile; char *outfile; int background; } Command_Info; int parse_cmd(char *cmd_line, Command_Info *cmd_info) { char *arg; char *args[MAX_ARGS_NUMBER]; int i = 0; arg = strtok(cmd_line, " "); while (arg != NULL) { args[i] = arg; arg = strtok(NULL, " "); i++; } num_elems = i;precisa em free_mem if (num_elems == 0) return 0; cmd_info->arg = (char **) ( malloc(num_elems * sizeof(char *)) ); cmd_info->infile = NULL; cmd_info->outfile = NULL; cmd_info->background = 0; bool b_infile = false; bool b_outfile = false; int iarg = 0; for (i = 0; i < num_elems; i++) { if ( !strcmp(args[i], "<") ) { if ( b_infile || i == num_elems-1 || !strcmp(args[i+1], "<") || !strcmp(args[i+1], ">") || !strcmp(args[i+1], "&") ) return -1; i++; cmd_info->infile = malloc(strlen(args[i]) * sizeof(char)); strcpy(cmd_info->infile, args[i]); b_infile = true; } else if (!strcmp(args[i], ">")) { if ( b_outfile || i == num_elems-1 || !strcmp(args[i+1], ">") || !strcmp(args[i+1], "<") || !strcmp(args[i+1], "&") ) return -1; i++; cmd_info->outfile = malloc(strlen(args[i]) * sizeof(char)); strcpy(cmd_info->outfile, args[i]); b_outfile = true; } else if (!strcmp(args[i], "&")) { if ( i == 0 || i != num_elems-1 || cmd_info->background ) return -1; cmd_info->background = true; } else { cmd_info->arg[iarg] = malloc(strlen(args[i]) * sizeof(char)); strcpy(cmd_info->arg[iarg], args[i]); iarg++; } } cmd_info->arg[iarg] = NULL; return 0; } void print_cmd(Command_Info *cmd_info) { int i; for (i = 0; cmd_info->arg[i] != NULL; i++) printf("arg[%d]=\"%s\"\n", i, cmd_info->arg[i]); printf("arg[%d]=\"%s\"\n", i, cmd_info->arg[i]); printf("infile=\"%s\"\n", cmd_info->infile); printf("outfile=\"%s\"\n", cmd_info->outfile); printf("background=\"%d\"\n", cmd_info->background); } void get_cmd(char* str) { fgets(str, MAX_COMMAND_LENGTH, stdin); str[strlen(str)-1] = '\0'; } pid_t exec_simple(Command_Info *cmd_info) { pid_t pid = fork(); if (pid < 0) { perror("Fork Error"); return -1; } if (pid == 0) { if ( (execvp(cmd_info->arg[0], cmd_info->arg)) == -1) { perror(cmd_info->arg[0]); exit(1); } } return pid; } void type_prompt(void) { printf("%s", PROMPT); } void syntax_error(void) { printf("msh syntax error\n"); } void free_mem(Command_Info *cmd_info) { int i; for (i = 0; cmd_info->arg[i] != NULL; i++) free(cmd_info->arg[i]); free(cmd_info->arg); free(cmd_info->infile); free(cmd_info->outfile); } int main(int argc, char* argv[]) { char cmd_line[MAX_COMMAND_LENGTH]; Command_Info cmd_info; //char* history[MAX_HISTORY_NUMBER]; while (true) { type_prompt(); get_cmd(cmd_line); if ( parse_cmd(cmd_line, &cmd_info) == -1) { syntax_error(); continue; } if (!strcmp(cmd_line, "")) continue; if (!strcmp(cmd_info.arg[0], "exit")) exit(0); pid_t pid = exec_simple(&cmd_info); waitpid(pid, NULL, 0); free_mem(&cmd_info); } return 0; }

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  • Return pointer to nested inner class from generic outer class

    - by helixed
    I'm new to C++, so bear with me. I have a generic class called A. A has a nested class called B. A contains a method called getB(), which is supposed to return a new instance of B. However, I can't get my code to compile. Here's what it looks like:#include A.h template <class E> class A { public: class B { public: int data; }; B * getB(); }; A.cpp #include "A.h" template <class E> A<E>::B * A::getB() { return new B(); } When I try to compile this, I get the following error: error: expected constructor, destructor, or type conversion before '*' token Does anybody know what I'm doing wrong? Thanks, helixed

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  • Objective-C Pointer to class that implements a protocol

    - by Winder
    I have three classes which implement the same protocol, and have the same parent class which doesn't implement the protocol. Normally I would have the protocol as pure virtual functions in the parent class but I couldn't find an Objective-C way to do that. How can I utilize polymorphism on these subclasses and call the functions implemented in the protocol without warnings? Some pseudocode if that didn't make sense: @interface superclass: NSObject {} @interface child1: superclass<MyProtocol> {} @interface child2: superclass<MyProtocol> {} The consumer of these classes: @class child1 @class child2 @class superclass @interface SomeViewController: UIViewController { child1 *oneView; child2 *otherView; superclass *currentView; } -(void) someMethod { [currentView protocolFunction]; } The only nice way I've found to do pure virtual functions in Objective-C is a hack by putting [self doesNotRecognizeSelector:_cmd]; in the parent class, but it isn't ideal.

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  • handling mouseover/mouseout events for dijit.TitlePane's titleNode

    - by Shailesh Kumar
    I have a lot of dijit.TitlePanes stacked up one after another. I wish to handle the onmouseover and onmouseout events for the tile part of the TitlePane. What is the correct way of doing this? Will something like : dojo.connect(titlePane.titleNode, 'onmouseover', function f() {}); work, where titlePane is a reference to some dijit.TitlePane object? Is there some declarative way of setting up such an event handler using "dojo/mehtod"?

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  • jQuery Drag And Drop Using Live Events

    - by devongovett
    Hello. I have an application with a long list that changes frequently, and I need this the items of this list to be draggable. I've been using the jQuery UI draggable plugin, but it is slow to add to 400+ list items, and has to be re-added every time new list items are added. Does anyone know of a plugin similar to the jQuery UI draggable plugin that uses jQuery 1.3's .live() events? This would solve both problems. Thanks!

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  • Parameter passing become pointer for integer

    - by Kangkan
    I am working on a c/Linux app for a device. I consume a web service (in WCF/c#) and use gSOAP for the same. The issue is that the parameters in the service methods become pointers for simple data types like int, short etc also. I initially used the same service exposed as ASMX web service and the client proxy generated using gSOAP created methods with parameters passed as values. But once the service has been upgraded to WCF, all the parameters became pointers. Can somebody help?

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  • Return a pointer to a char array in C

    - by snitko
    I've seen a lot of questions on that on StackOverflow, but reading the answers did not clear that up for me, probably because I'm a total newbie in C programming. Here's the code: #include <stdio.h> char* squeeze(char s[], char c); main() { printf("%s", squeeze("hello", 'o')); } char* squeeze(char s[], char c) { int i, j; for(i = j = 0; s[i] != '\0'; i++) if(s[i] != c) s[j++] = s[i]; s[j] = '\0'; return s; } It compiles and I get segmentation fault when I run it. I've read this faq about about returning arrays and tried the 'static' technique that is suggested there, but still could not get the program working. Could anyone point out exactly what's wrong with it and what should I be paying attention in the future?

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  • Convert "this" to a reference-to-pointer

    - by Austin Hyde
    Just stumbled onto this problem. (title says it all) Let's say I have a struct struct Foo { void bar () { do_baz(this); } void do_baz(Foo*& pFoo) { pFoo->p_sub_foo = new Foo; // for example } Foo* p_sub_foo; } GCC tells me that temp.cpp: In member function ‘void Foo::bar()’: temp.cpp:3: error: no matching function for call to ‘Foo::do_baz(Foo* const)’ temp.cpp:5: note: candidates are: void Foo::do_baz(Foo*&) So, how do I convert what is apparently a const Foo* to a Foo*&?

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  • doubt regarding carrying data in custom events using actionscript

    - by user267530
    Hi I am working on actionscript to generate a SWF dynamically using JSON data coming from an HTTP request. I receive the data on creationComplete and try to generate a tree like structure. I don’t create the whole tree at the same time. I create 2 levels, level 1 and level 2. My goal is to attach custom events on the panels which represent tree nodes. When users click the panels, it dispatches custom events and try to generate the next level. So, it goes like this : On creation complete - get JSON- create top tow levels - click on level 2- create the level 2 and level 3 - click on level 3- create level 3 and 4. …and so on and so on. I am attaching my code with this email. Please take a look at it and if you have any hints on how you would do this if you need to paint a tree having total level number = “n” where( 0 import com.iwobanas.effects.*; import flash.events.MouseEvent; import flash.filters.BitmapFilterQuality; import flash.filters.BitmapFilterType; import flash.filters.GradientGlowFilter; import mx.controls.Alert; private var roundedMask:Sprite; private var panel:NewPanel; public var oldPanelIds:Array = new Array(); public var pages:Array = new Array();//cleanup public var delPages:Array = new Array(); public function DrawPlaybook(pos:Number,title:String,chld:Object):void { panel = new NewPanel(chld); panel.title = title; panel.name=title; panel.width = 100; panel.height = 80; panel.x=pos+5; panel.y=40; // Define a gradient glow. var gradientGlow:GradientGlowFilter = new GradientGlowFilter(); gradientGlow.distance = 0; gradientGlow.angle = 45; gradientGlow.colors = [0xFFFFF0, 0xFFFFFF]; gradientGlow.alphas = [0, 1]; gradientGlow.ratios = [0, 255]; gradientGlow.blurX = 10; gradientGlow.blurY = 10; gradientGlow.strength = 2; gradientGlow.quality = BitmapFilterQuality.HIGH; gradientGlow.type = BitmapFilterType.OUTER; panel.filters =[gradientGlow]; this.rawChildren.addChild(panel); pages.push(panel); panel.addEventListener(MouseEvent.CLICK, function(e:MouseEvent){onClickHandler(e,title,chld)}); this.addEventListener(CustomPageClickEvent.PANEL_CLICKED, function(e:CustomPageClickEvent){onCustomPanelClicked(e,title)}); } public function onClickHandler(e:MouseEvent,title:String,chld:Object):void { //var panel:Panel; for each(var stp1:NewPanel in pages){ if(stp1.title==title){ var eventObj:CustomPageClickEvent = new CustomPageClickEvent("panelClicked"); eventObj.panelClicked = stp1; dispatchEvent(eventObj); } } } private function onCustomPanelClicked(e:CustomPageClickEvent,title:String):void { //cleanup itself Alert.show("onCustomPanelClicked" + title); var panel:NewPanel; for each(var stp:NewPanel in pages){ startAnimation(e,stp); } if(title == e.panelClicked.title){ panel = new NewPanel(null); panel.title = title; panel.name=title; panel.width = 150; panel.height = 80; panel.x=100; panel.y=40; this.rawChildren.addChild(panel); // var slideRight:SlideRight = new SlideRight(); slideRight.target=panel; slideRight.duration=750; slideRight.showTarget=true; slideRight.play(); //draw the steps var jsonData = this.map.getValue(title); var posX:Number = 50; var posY:Number = 175; for each ( var pnl:NewPanel in pages){ pages.pop(); } for each ( var stp1:Object in jsonData.children){ //Alert.show("map step=" + stp.text ); panel = new NewPanel(null); panel.title = stp1.text; panel.name=stp1.id; panel.width = 100; panel.id=stp1.id; panel.height = 80; panel.x = posX; panel.y=posY; posX+=150; var s:String="hi" + stp1.text; panel.addEventListener(MouseEvent.CLICK, function(e:MouseEvent){onChildClick(e,s);}); this.addEventListener(CustomPageClickEvent.PANEL_CLICKED, function(e:CustomPageClickEvent){onCustomPnlClicked(e)}); this.rawChildren.addChild(panel); // Alert.show("map step=" + this.getChildIndex(panel) ); // oldPanelIds.push(panel); pages.push(panel); //this.addEventListener(CustomPageClickEvent.PANEL_CLICKED, //function(e:CustomPageClickEvent){onCustomPanelClicked(e,title)}); var slide:SlideUp = new SlideUp(); slide.target=panel; slide.duration=1500; slide.showTarget=false; slide.play(); } } } public function onChildClick(e:MouseEvent,s:String):void { //var panel:Panel; //Alert.show(e.currentTarget.title); for each(var stp1:NewPanel in pages){ if(stp1.title==e.currentTarget.title){ var eventObj:CustomPageClickEvent = new CustomPageClickEvent("panelClicked"); eventObj.panelClicked = stp1; dispatchEvent(eventObj); } } } private function onCustomPnlClicked(e:CustomPageClickEvent):void { for each ( var pnl:NewPanel in pages){ pages.pop(); } //onCustomPanelClicked(e,e.currentTarget.title); //Alert.show("hi from cstm" + e.panelClicked.title); } private function fadePanel(event:Event,panel:NewPanel):void{ panel.alpha -= .005; if (panel.alpha <= 0){ //Alert.show(panel.title); panel.removeEventListener(Event.ENTER_FRAME, function(e:Event){fadePanel(e,panel);}); }; panel.title=""; } private function startAnimation(event:CustomPageClickEvent,panel:NewPanel):void{ panel.addEventListener(Event.ENTER_FRAME, function(e:Event){fadePanel(e,panel)}); } Thanks in advance. Palash

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  • What is the best way to bind PhoneGap events (like backbutton) to views in ember.js

    - by Fedor
    I'm playing with PhoneGap and emberjs (trying to build "proof of concept" mobile/HTML5 application based on ember.js). Ember.js itself works fine, but I haven't found any good way to "bind" PhoneGap events to views. For instance, I would like to handle backbutton event and remove a view on it. It would be nice to define behavior in view class and call document.addEventListener when instance of the view is appended and call document.removeEventListener when view instance removed.

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  • Modify QueryString on PostBack to include an anchor bookmark without breaking subsequent events and

    - by roosteronacid
    Consider the following pseudo-code: // sorts the dataset used by the table void ClickEvent() { } foreach (column in table) { // create new LinkButton var lb = new LinkButton(); // hook sort event lb.Click += ClickEvent; // add LinkButton to table table.Controls.add(lb); } How can I modify the QueryString to include an anchor bookmark without breaking subsequent events and without using the dreaded PostBackUrl property on the LinkButtons?

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  • Bit shift and pointer oddities in C, looking for explanations

    - by foo
    Hi all, I discovered something odd that I can't explain. If someone here can see what or why this is happening I'd like to know. What I'm doing is taking an unsigned short containing 12 bits aligned high like this: 1111 1111 1111 0000 I then want to shif the bits so that each byte in the short hold 7bits with the MSB as a pad. The result on what's presented above should look like this: 0111 1111 0111 1100 What I have done is this: unsigned short buf = 0xfff; //align high buf <<= 4; buf >>= 1; *((char*)&buf) >>= 1; This gives me something like looks like it's correct but the result of the last shift leaves the bit set like this: 0111 1111 1111 1100 Very odd. If I use an unsigned char as a temporary storage and shift that then it works, like this: unsigned short buf = 0xfff; buf <<= 4; buf >>= 1; tmp = *((char*)&buf); *((char*)&buf) = tmp >> 1; The result of this is: 0111 1111 0111 1100 Any ideas what is going on here?

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  • Capture global touch events (Symbian)

    - by Leonth
    Basically I wanted what the pys60 module keycapture does (global capture of keystrokes) but I wanted to do this with the touchscreen. So if the program is running, all touch events can be intercepted and logged by the program. How is this possible?

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  • Passing pointer position to an object in Java.

    - by Gabriel A. Zorrilla
    I've got a JPanel class called Board with a static subclass, MouseHanlder, which tracks the mouse position along the appropriate listener in Board. My Board class has fields pointerX and pointerY. How do i pass the e.getX() and e.getY() from the MouseHandler subclass to its super class JPanel? I tried with getters, setters, super, and cant get the data transfer between subclass and parent class. I'm certain it's a concept issue, but im stuck. Thanks!

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  • Initialize Pointer Through Function

    - by SoulBeaver
    I was browsing my teacher's code when I stumbled across this: Order* order1 = NULL; then order1 = order(customer1, product2); which calls Order* order(Customer* customer, Product* product) { return new Order(customer, product); } This looks like silly code. I'm not sure why, but the teacher initialized all pointers to NULL instead of declaring them right away(looking at the code it's entirely possible, but he chose not to). My question is: is this good or acceptable code? Does the function call have any benefits over calling a constructor explicitely? And how does new work in this case? Can I imagine the code now as kind of like: order1 = new Order(customer, product);

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  • Significant events in Computer Science

    - by Brabster
    What were the most significant events or milestones in the history of computer science? I haven't been able to find a potted history, so I thought I'd see what views the SO community had on the question. I'm studying for a Masters in CS at the moment, so I'm hoping for some stuff to go take a look at that I've not come across before. Related: Computer science advances in past 5 years Significant new inventions in computing since 1980

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  • Function pointer arrays in Fortran

    - by Eduardo Dobay
    I can create function pointers in Fortran 90, with code like real, external :: f and then use f as an argument to another function/subroutine. But what if I want an array of function pointers? In C I would just do double (*f[])(int); to create an array of functions returning double and taking an integer argument. I tried the most obvious, real, external, dimension(3) :: f but gfortran doesn't let me mix EXTERNAL and DIMENSION. Is there any way to do what I want? (The context for this is a program for solving a system of differential equations, so I could input the equations without having a million parameters in my subroutines.)

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  • Testing Shake events on Android Emulator

    - by mob-king
    Can any one help with how to test sensor events like shake on Android Emulator. I have found some posts pointing to openintents but can anyone explain how to use it in android 2.0 avd http://code.google.com/p/openintents/wiki/SensorSimulator This has some solution but while installing OpenIntents.apk on emulator gives missing library error.

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