Convert javascript array to java array
Is there any way possible to convert javascript array to java array?
if you will try to experiment a javascript array
putting it to a hidden element, it will be converted
to a string (comma delimited). You can get the value
of that element as a string and use StringTokenizer
class to put the values into a java arrayThanks, got it.
Similar Messages
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Easy way to convert javascript to a java applet?
Hello all! I am relatively new to java and java programming and had a question about converting a JavaScript to a java applet or even a standalone application. I included the JavaScript code for a checkers game below and wanted to know what would be the easiest way to convert this code if at all possible?
Thanks in advance,
Bob
<SCRIPT language=JavaScript>
<!--
version = 1.0;
// -->
</SCRIPT>
<SCRIPT language=JavaScript1.1>
<!--
version = 1.1;
// -->
</SCRIPT>
<SCRIPT language=JavaScript>
<!--
if (version==1.0)
document.write("Your browser doesn't have JavaScript 1.1 capabilities. "
+ "This checkers game script only works on Netscape 3+ and MSIE 4+.");
// -->
</SCRIPT>
<SCRIPT language=JavaScript1.1>
<!--
// Checkers Game
// black.gif
// gray.gif
// you1.gif -- normal piece (player/red)
// you2.gif -- highlighted piece
// you1k.gif -- kinged normal piece
// you2k.gif -- kinged highlighted piece
// me1.gif -- normal piece (computer/black)
// me2.gif -- highlighted piece
// me1k.gif -- kinged normal piece
// me2k.gif -- kinged highlighted piece
function preload() {
this.length = preload.arguments.length;
for (var i = 0; i < this.length; i++) {
this[i] = new Image();
this.src = preload.arguments[i];
var pics = new preload("black.gif","gray.gif",
"you1.gif","you2.gif","you1k.gif","you2k.gif",
"me1.gif","me2.gif","me1k.gif","me2k.gif");
var black = -1; // computer is black
var red = 1; // visitor is red
var square_dim = 35;
var piece_toggled = false;
var my_turn = false;
var double_jump = false;
var comp_move = false;
var game_is_over = false;
var safe_from = safe_to = null;
var toggler = null;
var togglers = 0;
function Board() {
board = new Array();
for (var i=0;i<8; i++) {
board[i] = new Array();
for (var j=0;j<8;j++)
board[i][j] = Board.arguments[8*j+i];
board[-2] = new Array(); // prevents errors
board[-1] = new Array(); // prevents errors
board[8] = new Array(); // prevents errors
board[9] = new Array(); // prevents errors
var board;
Board(1,0,1,0,1,0,1,0,
0,1,0,1,0,1,0,1,
1,0,1,0,1,0,1,0,
0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,
0,-1,0,-1,0,-1,0,-1,
-1,0,-1,0,-1,0,-1,0,
0,-1,0,-1,0,-1,0,-1);
function message(str) {
if (!game_is_over)
document.disp.message.value = str;
function moveable_space(i,j) {
// calculates whether it is a gray (moveable)
// or black (non-moveable) space
return (((i%2)+j)%2 == 0);
function Coord(x,y) {
this.x = x;
this.y = y;
function coord(x,y) {
c = new Coord(x,y);
return c;
document.write("<table border=0 cellspacing=0 cellpadding=0 width="+(square_dim*8+8)
+"<tr><td><img src='black.gif' width="+(square_dim*8+8)
+" height=4><br></td></tr>");
for(var j=0;j<8;j++) {
document.write("<tr><td><img src='black.gif' width=4 height="+square_dim+">");
for(var i=0;i<8;i++) {
if (moveable_space(i,j))
document.write("<a href='javascript:clicked("+i+","+j+")'>");
document.write("<img src='");
if (board[i][j]==1) document.write("you1.gif");
else if (board[i][j]==-1) document.write("me1.gif");
else if (moveable_space(i,j)) document.write("gray.gif");
else document.write("black.gif");
document.write("' width="+square_dim+" height="+square_dim
+" name='space"+i+""+j+"' border=0>");
if (moveable_space(i,j)) document.write("</a>");
document.write("<img src='black.gif' width=4 height="+square_dim+"></td></tr>");
document.write("<tr><td><img src='black.gif' width="+(square_dim*8+8)
+" height=4><br></td></tr></table><br>"
+"<form name='disp'><textarea name='message' wrap=virtual rows=2 cols=40></textarea><br><input "
+"type=button value=\"Start the Game Over\" onClick=\"location.href+=''\"></form>");
function clicked(i,j) {
if (my_turn) {
if (integ(board[i][j])==1) toggle(i,j);
else if (piece_toggled) move(selected,coord(i,j));
else message("First click one of your red pieces, then click where you want to move it");
} else {
message("It's not your turn yet. Hang on a sec!");
function toggle(x,y) {
if (my_turn) {
if (piece_toggled)
draw(selected.x,selected.y,"you1"+((board[selected.x][selected.y]==1.1)?"k":"")+".gif");
if (piece_toggled && (selected.x == x) && (selected.y == y)) {
piece_toggled = false;
if (double_jump) { my_turn = double_jump = false; computer(); }
} else {
piece_toggled = true;
draw(x,y,"you2"+((board[x][y]==1.1)?"k":"")+".gif");
selected = coord(x,y);
} else {
if ((piece_toggled) && (integ(board[selected_c.x][selected_c.y])==-1))
draw(selected_c.x,selected_c.y,"me1"+((board[selected_c.x][selected_c.y]==-1.1)?"k":"")+".gif");
if (piece_toggled && (selected_c.x == x) && (selected_c.y == y)) {
piece_toggled = false;
} else {
piece_toggled = true;
draw(x,y,"me2"+((board[x][y]==-1.1)?"k":"")+".gif");
selected_c = coord(x,y);
function draw(x,y,name) {
document.images["space"+x+""+y].src = name;
function integ(num) {
if (num != null)
return Math.round(num);
else
return null;
function abs(num) {
return Math.abs(num);
function sign(num) {
if (num < 0) return -1;
else return 1;
function concatenate(arr1,arr2) {
// function tacks the second array onto the end of the first and returns result
for(var i=0;i<arr2.length;i++)
arr1[arr1.length+i] = arr2[i];
return arr1;
function legal_move(from,to) {
if ((to.x < 0) || (to.y < 0) || (to.x > 7) || (to.y > 7)) return false;
piece = board[from.x][from.y];
distance = coord(to.x-from.x,to.y-from.y);
if ((distance.x == 0) || (distance.y == 0)) {
message("You may only move diagonally.");
return false;
if (abs(distance.x) != abs(distance.y)) {
message("Invalid move.");
return false;
if (abs(distance.x) > 2) {
message("Invalid move.");
return false;
if ((abs(distance.x) == 1) && double_jump) {
return false;
if ((board[to.x][to.y] != 0) || (piece == 0)) {
return false;
if ((abs(distance.x) == 2)
&& (integ(piece) != -integ(board[from.x+sign(distance.x)][from.y+sign(distance.y)]))) {
return false;
if ((integ(piece) == piece) && (sign(piece) != sign(distance.y))) {
return false;
return true;
function move(from,to) {
my_turn = true;
if (legal_move(from,to)) {
piece = board[from.x][from.y];
distance = coord(to.x-from.x,to.y-from.y);
if ((abs(distance.x) == 1) && (board[to.x][to.y] == 0)) {
swap(from,to);
} else if ((abs(distance.x) == 2)
&& (integ(piece) != integ(board[from.x+sign(distance.x)][from.y+sign(distance.y)]))) {
double_jump = false;
swap(from,to);
remove(from.x+sign(distance.x),from.y+sign(distance.y));
if ((legal_move(to,coord(to.x+2,to.y+2)))
|| (legal_move(to,coord(to.x+2,to.y-2)))
|| (legal_move(to,coord(to.x-2,to.y-2)))
|| (legal_move(to,coord(to.x-2,to.y+2)))) {
double_jump = true;
message("You may complete the double jump or click on your piece to stay still.");
if ((board[to.x][to.y] == 1) && (to.y == 7)) king_me(to.x,to.y);
selected = to;
if (game_over() && !double_jump) {
setTimeout("toggle("+to.x+","+to.y+");my_turn = double_jump = false;computer();",1000);
return true;
function king_me(x,y) {
if (board[x][y] == 1) {
board[x][y] = 1.1; // king you
draw(x,y,"you2k.gif");
} else if (board[x][y] == -1) {
board[x][y] = -1.1; // king me
draw(x,y,"me2k.gif");
function swap(from,to) {
if (my_turn || comp_move) {
dummy_src = document.images["space"+to.x+""+to.y].src;
document.images["space"+to.x+""+to.y].src = document.images["space"+from.x+""+from.y].src;
document.images["space"+from.x+""+from.y].src = dummy_src;
dummy_num = board[from.x][from.y];
board[from.x][from.y] = board[to.x][to.y];
board[to.x][to.y] = dummy_num;
function remove(x,y) {
if (my_turn || comp_move)
draw(x,y,"gray.gif");
board[x][y] = 0;
function Result(val) {
this.high = val;
this.dir = new Array();
function move_comp(from,to) {
toggle(from.x,from.y);
comp_move = true;
swap(from,to);
if (abs(from.x-to.x) == 2) {
remove(from.x+sign(to.x-from.x),from.y+sign(to.y-from.y));
if ((board[to.x][to.y] == -1) && (to.y == 0)) king_me(to.x,to.y);
setTimeout("selected_c = coord("+to.x+","+to.y+");piece_toggled = true;",900);
setTimeout("bak=my_turn;my_turn=false;toggle("+to.x+","+to.y+");my_turn=bak;",1000);
if (game_over()) {
setTimeout("comp_move = false;my_turn = true;togglers=0;",600);
message("Ok. It's your turn. You may make your move.");
return true;
function game_over() { // make sure game is not over (return false if game is over)
comp = you = false;
for(var i=0;i<8;i++) {
for(var j=0;j<8;j++) {
if(integ(board[i][j]) == -1) comp = true;
if(integ(board[i][j]) == 1) you = true;
if (!comp) message("You beat me!");
if (!you) message("Gotcha! Game over.");
game_is_over = (!comp || !you)
return (!game_is_over);
// the higher the jump_priority, the more often the computer will take the jump over the safe move
var jump_priority = 10;
function computer() {
// step one - prevent any jumps
for(var j=0;j<8;j++) {
for(var i=0;i<8;i++) {
if (integ(board[i][j]) == 1) {
if ((legal_move(coord(i,j),coord(i+2,j+2))) && (prevent(coord(i+2,j+2),coord(i+1,j+1)))) {
return true;
} if ((legal_move(coord(i,j),coord(i-2,j+2))) && (prevent(coord(i-2,j+2),coord(i-1,j+1)))) {
return true;
} if (board[i][j] == 1.1) {
if ((legal_move(coord(i,j),coord(i-2,j-2))) && (prevent(coord(i-2,j-2),coord(i-1,j-1)))) {
return true;
} if ((legal_move(coord(i,j),coord(i+2,j-2))) && (prevent(coord(i+2,j-2),coord(i+1,j-1)))) {
return true;
// step two - if step one not taken, look for jumps
for(var j=7;j>=0;j--) {
for(var i=0;i<8;i++) {
if (jump(i,j))
return true;
safe_from = null;
// step three - if step two not taken, look for safe single space moves
for(var j=0;j<8;j++) {
for(var i=0;i<8;i++) {
if (single(i,j))
return true;
// if no safe moves, just take whatever you can get
if (safe_from != null) {
move_comp(safe_from,safe_to);
} else {
message("You beat me!!");
game_is_over = true;
safe_from = safe_to = null;
return false;
function jump(i,j) {
if (board[i][j] == -1.1) {
if (legal_move(coord(i,j),coord(i+2,j+2))) {
move_comp(coord(i,j),coord(i+2,j+2));
setTimeout("jump("+(i+2)+","+(j+2)+");",500);
return true;
} if (legal_move(coord(i,j),coord(i-2,j+2))) {
move_comp(coord(i,j),coord(i-2,j+2));
setTimeout("jump("+(i-2)+","+(j+2)+");",500);
return true;
} if (integ(board[i][j]) == -1) {
if (legal_move(coord(i,j),coord(i-2,j-2))) {
move_comp(coord(i,j),coord(i-2,j-2));
setTimeout("jump("+(i-2)+","+(j-2)+");",500);
return true;
} if (legal_move(coord(i,j),coord(i+2,j-2))) {
move_comp(coord(i,j),coord(i+2,j-2));
setTimeout("jump("+(i+2)+","+(j-2)+");",500);
return true;
return false;
function single(i,j) {
if (board[i][j] == -1.1) {
if (legal_move(coord(i,j),coord(i+1,j+1))) {
safe_from = coord(i,j);
safe_to = coord(i+1,j+1);
if (wise(coord(i,j),coord(i+1,j+1))) {
move_comp(coord(i,j),coord(i+1,j+1));
return true;
} if (legal_move(coord(i,j),coord(i-1,j+1))) {
safe_from = coord(i,j);
safe_to = coord(i-1,j+1);
if (wise(coord(i,j),coord(i-1,j+1))) {
move_comp(coord(i,j),coord(i-1,j+1));
return true;
} if (integ(board[i][j]) == -1) {
if (legal_move(coord(i,j),coord(i+1,j-1))) {
safe_from = coord(i,j);
safe_to = coord(i+1,j-1);
if (wise(coord(i,j),coord(i+1,j-1))) {
move_comp(coord(i,j),coord(i+1,j-1));
return true;
} if (legal_move(coord(i,j),coord(i-1,j-1))) {
safe_from = coord(i,j);
safe_to = coord(i-1,j-1);
if (wise(coord(i,j),coord(i-1,j-1))) {
move_comp(coord(i,j),coord(i-1,j-1));
return true;
return false;
function possibilities(x,y) {
if (!jump(x,y))
if (!single(x,y))
return true;
else
return false;
else
return false;
function prevent(end,s) {
i = end.x;
j = end.y;
if (!possibilities(s.x,s.y))
return true;
else if ((integ(board[i-1][j+1])==-1) && (legal_move(coord(i-1,j+1),coord(i,j)))) {
return move_comp(coord(i-1,j+1),coord(i,j));
} else if ((integ(board[i+1][j+1])==-1) && (legal_move(coord(i+1,j+1),coord(i,j)))) {
return move_comp(coord(i+1,j+1),coord(i,j));
} else if ((board[i-1][j-1]==-1.1) && (legal_move(coord(i-1,j-1),coord(i,j)))) {
return move_comp(coord(i-1,j-1),coord(i,j));
} else if ((board[i+1][j-1]==-1.1) && (legal_move(coord(i+1,j-1),coord(i,j)))) {
return move_comp(coord(i+1,j-1),coord(i,j));
} else {
return false;
function wise(from,to) {
i = to.x;
j = to.y;
n = (j>0);
s = (j<7);
e = (i<7);
w = (i>0);
if (n&&e) ne = board[i+1][j-1]; else ne = null;
if (n&&w) nw = board[i-1][j-1]; else nw = null;
if (s&&e) se = board[i+1][j+1]; else se = null;
if (s&&w) sw = board[i-1][j+1]; else sw = null;
eval(((j-from.y != 1)?"s":"n")+((i-from.x != 1)?"e":"w")+"=0;");
if ((sw==0) && (integ(ne)==1)) return false;
if ((se==0) && (integ(nw)==1)) return false;
if ((nw==0) && (se==1.1)) return false;
if ((ne==0) && (sw==1.1)) return false;
return true;
message("You may begin! Select a piece to move.");
my_turn = true;
// -->
</SCRIPT>Well, you can get a free tutorial to Java at http://www.mindview.net/. It's the "Thinking In Java" book. You can download the whole book from that site, it's about a thousand pages. If you read that whole book, you'll know exactly where to start and probably how to finish it too.
As a gimmie, think about it -- you'll have to remove all of the browser-detect code, since browser-detection is only done to determine which version of JavaScript is supported by the browser. -
Assigning java script array to java array..
hi,
can anyone tell me how to assign java script array to a java array which is bean.var input = document.createElement("input");
input.setAttribute("type", "hidden");
input.setAttribute("name", "bla..bla");
input.setAttribute("value", "bla..bla");And in addition to that.. Google is still alive -
Struts 2: Doesn't populate an array of java beans in action classes
Hello,
Currently i am working on Struts 2 based application, in which i need to populate an array of Java beans from the form.
The problem, I am facing is:
Struts 2 is not instantiating an array of beans
I have gone through the Data transfer and Type Conversion of struts of 1.2, but every where I can see only following:
1 An array of primitive data types
2 List of primitive / Java bean
3 Map of primitive / Java bean
but i can't see the docs on An array of Java Beans.
What I can't do in my application is:
1 Can not convert an array of beans into java.util.List<beans>
2 Can not instantiate the bean array (As the number of elements will be decided by the front end - form)
Please have a look at my configuration file:
struts.xml:+
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<constant name="struts.devMode" value="true" />
<include file="test/test.xml"/>
</struts>
test.xml:+
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<package name="test" namespace="/test" extends="struts-default">
<action name="TestInput">
<result>/test/input.jsp</result>
</action>
<action name="TestOutput" class="test.Controller">
<result name="SUCCESS">/test/output.jsp</result>
</action>
</package>
</struts> Controller.java+
package test;
public class Controller {
private String id = null;
private Contact[] contacts = null;
public String execute() {
System.out.println("***********************************");
System.out.println("id::: " + getId());
System.out.println("contacts::: " + getContacts());
System.out.println("***********************************");
return "SUCCESS";
public Contact[] getContacts() {
return contacts;
public void setContacts(Contact[] contacts) {
this.contacts = contacts;
public String getId() {
return id;
public void setId(String id) {
this.id = id;
} Contact.java:+
package test;
public class Contact {
private String name = null;
public String getName() {
return name;
public void setName(String name) {
this.name = name;
}+ input.jsp:+
<%@ page contentType="text/html; charset=UTF-8" %>
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
<title>Test Form</title>
</head>
<SCRIPT type="text/javascript">
// Total number of contacts in the mail request form
var totalContacts = 0;
function addContact() {
var tbody = document.getElementById('testTable').getElementsByTagName('tbody')[0];
var row = document.createElement('TR');
var td1 = document.createElement('TD');
var td2 = document.createElement('TD');
var inputBox = document.createElement('INPUT');
td1.innerHTML = new String('Contact ' + (totalContacts + 1) + ' :');
inputBox.type = 'text';
inputBox.name = 'contacts['+totalContacts+'].name';
//inputBox.name = 'contacts.name';
td2.appendChild(inputBox);
row.appendChild(td1);
row.appendChild(td2);
tbody.appendChild(row);
// Add to the total number of contacts
totalContacts += 1;
</SCRIPT>
<body>
<h4>Mail Request Form</h4>
<s:form action="TestOutput">
<table border="1" id="testTable">
<tr>
<td colspan="2">
<s:textfield name="id" label="Request Id"/>
</td>
</tr>
<tr>
<td align="left">
<input type="button" value="Add Contact" onklick="javascript:addContact();"/>
</td>
<td align="right">
<s:submit/>
</td>
</tr>
</table>
</s:form>
</body>
</html>
+ output.jsp:+ Not concerned right now
Exception got in the logs after submitting the form:+
java.lang.InstantiationException: [Ltest.Contact;
at java.lang.Class.newInstance0(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at com.opensymphony.xwork2.ObjectFactory.buildBean(ObjectFactory.java:123)
at com.opensymphony.xwork2.util.InstantiatingNullHandler.createObject(InstantiatingNullHandler.java:123)
at com.opensymphony.xwork2.util.InstantiatingNullHandler.nullPropertyValue(InstantiatingNullHandler.java:104)
at ognl.ASTProperty.getValueBody(ASTProperty.java:94)
at ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:170)
at ognl.SimpleNode.getValue(SimpleNode.java:210)
at ognl.ASTChain.setValueBody(ASTChain.java:168)
at ognl.SimpleNode.evaluateSetValueBody(SimpleNode.java:177)
at ognl.SimpleNode.setValue(SimpleNode.java:246)
at ognl.Ognl.setValue(Ognl.java:476)
at com.opensymphony.xwork2.util.OgnlUtil.setValue(OgnlUtil.java:186)
at com.opensymphony.xwork2.util.OgnlValueStack.setValue(OgnlValueStack.java:158)
at com.opensymphony.xwork2.util.OgnlValueStack.setValue(OgnlValueStack.java:146)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.setParameters(ParametersInterceptor.java:193)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:159)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:105)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:83)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:207)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:74)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:127)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
at org.apache.struts2.interceptor.ProfilingActivationInterceptor.intercept(ProfilingActivationInterceptor.java:107)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:206)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:115)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:143)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:121)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:170)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:123)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:176)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:50)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:504)
at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:419)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Unknown Source)
Please give me suggestions to move forward
Thanks in advance
Vikas ParikhI am having the same issue. It appears that the RequestProcessor.processValidate adds the errors (ActionMessages) to the request the does a forward. As such the errors are not available to the jsp page. Does any one know a way to get round this?
-
How to store logical operator in an array in java
how to store logical operator in an array in java.
Array should not be String type if i pass an element of that array it should be considered as logical operatormy exact requirment is like this, i need some logic
to convert string like this "2 Equals 3 AND 4 greater
than 7" to condition like this
2 == 3 && 4 >7 which i can pass to if
condition.So you want to create an expression parser?
No need for something as ugly as what you think you need, a simple nested conditional will do it for just the few logical operations. -
Converting XML String to MessageElement array
Hi,
I am trying to call a .NET web service from my Java client. I used WSDL2Java to generate the java classes for calling the .NET web service. The generated classes to call the service expects an array of org.apache.axis.message.MessageElement objects. I have a string representing an XML document which looks like this:
String xmlString = "<Results><Adjustments><Adjustment><RebuildAdjustmentID>16</RebuildAdjustmentID><IsBasicAdjustment>true</IsBasicAdjustment><AdjustmentType>stone/AdjustmentType><Title>External walls</Title></Adjustment></Adjustments></Results>"
I have tried converting the string into an array of MessageElement objects by the following way:
MessageElement[] m = new MessageElement[1];
Document XMLDoc = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(new InputSource(new StringReader(result2.toString())));
m[0] = XMLDoc.getDocumentElement();
However I keep getting the following message returned from the service:
"Object reference not set to an instance of an object"
I have tried a handful of ways but keep getting this same error. I have searched the web for hours looking for a solution to this problem without success so any help/ideas much appreciated,
Thanks.
PaulAny updates on this?
I am facing a similar problem. -
I was given an object model generated by an apache product, Axis. The generated java files use the Java Array in the following fashion:
Class Zoo {
private ArrayOfAnimals animals;
// ⦠public get/set methods cut
Class ArrayOfAnimals {
private Animal animals[];
// ⦠public get/set methods cut
Class Animal {
private String name;
// ⦠public get/set methods cut
I was tasked with mapping the one-to-many relationship between zoo and an array of animals using the Animal array. I canât find a mapping in TopLink to do this type of association. I am NOT allowed to modify the generated source code. I may be able to extend the generated classes, and perhaps provide a different superclass.
I am allowed to create the relational model for these domain classes. Can anyone help with this type of mapping?
ThanksTopLink does not directly support arrays as the mapping type for a collection, only collection types that support the Collection and Map interfaces.
In general it seems odd to use an array instead of a Java collection which would be much more efficient (in terms of adding and removing) and much more functional. I would definitely suggest changing the generated code, or the way the code is generated if at all possible.
The easiest way to map the array in TopLink would be the use get/set methods for the 1-m mapping on the Zoo class that converted the array to/from a Collection.
i.e. something like,
public List getAnimalsList() {
return new Arrays.asList(animals.animals);
public void setAnimalsList(List list) {
animals.animals = (Animal[]) list.toArray();
In general TopLink uses its ContainerPolicy class to handle collections. It may also be possible (but advanced) to write a custom container policy for your 1-m mapping that handles arrays. -
Conversion of java Array to oracle SQL Array while calling Stored Procedure
How java Array can be converted to oracle SQL array while calling Stored procedure with callable statement.
i.e java Array ---> Sql Array in Oracle while setting the datatypes to callable statement arguments.Look at:
http://forum.java.sun.com/thread.jsp?forum=48&thread=376735&tstart=0&trange=15
Paul -
ORA-00932 when trying to pass ARRAY from Java SP to PL/SQL
Hi all
I am trying to pass ARRAYs back and forth between PL/SQL and Java stored procedures. But I keep getting:
ORA-00932: inconsistent datatypes: expected a return value that is an instance of a user defined Java class convertible to an Oracle type got an object that could not be converted
Here's my PL/SQL:
create or replace type CONTENTP.sentences_array as VARRAY(1000) of CLOB
-- I've also tried .. as TABLE of CLOB and varray/table of VARCHAR2
declare
proc_clob CLOB;
arr SENTENCES_ARRAY;
begin
SELECT document_body
into proc_clob
from documents
where document_id = 618784;
arr := processdocument.sentencesplit (proc_clob);
end;
PROCESSDOCUMENT package definition:
CREATE OR REPLACE PACKAGE CONTENTP.PROCESSDOCUMENT AS
FUNCTION sentenceSplit(Param1 CLOB)
return SENTENCES_ARRAY
AS
LANGUAGE java
NAME 'com.contentp.documents.ProcessDocument.sentenceSplit(oracle.sql.CLOB) return oracle.sql.ARRAY';
FUNCTION removeHTML(Param1 CLOB)
return CLOB
AS
LANGUAGE java
NAME 'com.contentp.documents.ProcessDocument.removeHTML(oracle.sql.CLOB) return oracle.sql.CLOB';
end;
Java sentenceSplit code:
public static oracle.sql.ARRAY sentenceSplit ( CLOB text) throws IOException, SQLException
Connection conn = new OracleDriver().defaultConnection();
String[] arrSentences = sent.getsentences ( CLOBtoString (text) );
ArrayDescriptor arrayDesc =
ArrayDescriptor.createDescriptor ("SENTENCES_ARRAY", conn);
ARRAY ARRSentences = new ARRAY (arrayDesc, conn, arrSentences);
return ARRSentences;
I have confirmed that the String[] arrSentences contains a valid string array. So the problem seems to be the creation and passing of ARRSentences.
I have looked at pages and pages of documents and example code, and can't see anything wrong with my declaration of ARRSentences. I'm at a loss to explain what's wrong.
Thanks in advance - any help is much appreciated!I am trying to do something similar but seems like getting stuck at registerOutParameter for this.
Type definition:
CREATE OR REPLACE
type APL_CCAM9.VARCHARARRAY as table of VARCHAR2(100)
Java Stored Function code:
public static ARRAY fetchData (ARRAY originAreaCds, ARRAY serviceCds, ARRAY vvpcs) {
Connection connection = null;
ARRAY array = null;
try {
connection = new OracleDriver ().defaultConnection();
connection.setAutoCommit(false);
ArrayDescriptor adString = ArrayDescriptor.createDescriptor("VARCHARARRAY", connection);
String[] result = new String [2];
result[0] = "Foo";
result[1] = "Foo1";
array = new ARRAY (adString, connection, result);
connection.commit ();
return array;
} catch (SQLException sqlexp) {
try {
connection.rollback();
} catch (SQLException exp) {
return array;
Oracle Stored Function:
function FETCH_TRADE_DYN_DATA (AREA_CDS IN VARCHARARRAY, SERVICE_CDS IN VARCHARARRAY,VV_CDS IN VARCHARARRAY) return VARCHARARRAY AS LANGUAGE JAVA NAME 'com.apl.ccam.oracle.js.dalc.TDynAllocation.fetchData (oracle.sql.ARRAY, oracle.sql.ARRAY, oracle.sql.ARRAY) return oracle.sql.ARRAY';
Java Code calling Oracle Stored Procedure:
ocs = (OracleCallableStatement) oraconn.prepareCall(queryBuf.toString());
ArrayDescriptor adString = ArrayDescriptor.createDescriptor("VARCHARARRAY", oraconn);
String[] originAreaCds = sTDynAllocationVO.getGeogAreaCds();
ARRAY areaCdArray = new ARRAY (adString, oraconn, originAreaCds);
ocs.registerOutParameter(1, OracleTypes.ARRAY);
ocs.setArray (2, areaCdArray);
String[] serviceCds = sTDynAllocationVO.getServiceCds();
ARRAY serviceCdsArray = new ARRAY (adString, oraconn, serviceCds );
ocs.setArray (3, serviceCdsArray);
String[] vvpcs = sTDynAllocationVO.getVesselVoyagePortCdCallNbrs();
ARRAY vvpcsArray = new ARRAY (adString, oraconn, vvpcs);
ocs.setArray (4, vvpcsArray);
ocs.execute();
ARRAY results = ocs.getARRAY(1);
Error I get:
Parameter Type Conflict: sqlType=2003
Thanks for help in advance. -
Passing Array of java objects to and from oracle database-Complete Example
Hi all ,
I am posting a working example of Passing Array of java objects to and from oracle database . I have struggled a lot to get it working and since finally its working , postinmg it here so that it coudl be helpful to the rest of the folks.
First thinsg first
i) Create a Java Value Object which you want to pass .
create or replace and compile java source named Person as
import java.sql.*;
import java.io.*;
public class Person implements SQLData
private String sql_type = "PERSON_T";
public int person_id;
public String person_name;
public Person () {}
public String getSQLTypeName() throws SQLException { return sql_type; }
public void readSQL(SQLInput stream, String typeName) throws SQLException
sql_type = typeName;
person_id = stream.readInt();
person_name = stream.readString();
public void writeSQL(SQLOutput stream) throws SQLException
stream.writeInt (person_id);
stream.writeString (person_name);
ii) Once you created a Java class compile this class in sql plus. Just Copy paste and run it in SQL .
you should see a message called "Java created."
iii) Now create your object Types
CREATE TYPE person_t AS OBJECT
EXTERNAL NAME 'Person' LANGUAGE JAVA
USING SQLData (
person_id NUMBER(9) EXTERNAL NAME 'person_id',
person_name VARCHAR2(30) EXTERNAL NAME 'person_name'
iv) Now create a table of Objects
CREATE TYPE person_tab IS TABLE OF person_t;
v) Now create your procedure . Ensure that you create dummy table called "person_test" for loggiing values.
create or replace
procedure give_me_an_array( p_array in person_tab,p_arrayout out person_tab)
as
l_person_id Number;
l_person_name Varchar2(200);
l_person person_t;
l_p_arrayout person_tab;
errm Varchar2(2000);
begin
l_p_arrayout := person_tab();
for i in 1 .. p_array.count
loop
l_p_arrayout.extend;
insert into person_test values(p_array(i).person_id, 'in Record '||p_array(i).person_name);
l_person_id := p_array(i).person_id;
l_person_name := p_array(i).person_name;
l_person := person_t(null,null);
l_person.person_id := l_person_id + 5;
l_person.person_name := 'Out Record ' ||l_person_name ;
l_p_arrayout(i) := l_person;
end loop;
p_arrayout := l_p_arrayout;
l_person_id := p_arrayout.count;
for i in 1 .. p_arrayout.count
loop
insert into person_test values(l_person_id, p_arrayout(i).person_name);
end loop;
commit;
EXCEPTION WHEN OTHERS THEN
errm := SQLERRM;
insert into person_test values(-1, errm);
commit;
end;
vi) Now finally create your java class which will invoke the pl/sql procedure and get the updated value array and then display it on your screen>Alternatively you can also check the "person_test" tbale
import java.util.Date;
import java.io.*;
import java.sql.*;
import oracle.sql.*;
import oracle.jdbc.driver.*;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
public class ArrayDemo
public static void passArray() throws SQLException
Connection conn = getConnection();
ArrayDemo a = new ArrayDemo();
Person pn1 = new Person();
pn1.person_id = 1;
pn1.person_name = "SunilKumar";
Person pn2 = new Person();
pn2.person_id = 2;
pn2.person_name = "Superb";
Person pn3 = new Person();
pn3.person_id = 31;
pn3.person_name = "Outstanding";
Person[] P_arr = {pn1, pn2, pn3};
Person[] P_arr_out = new Person[3];
ArrayDescriptor descriptor =
ArrayDescriptor.createDescriptor( "PERSON_TAB", conn );
ARRAY array_to_pass =
new ARRAY( descriptor, conn, P_arr);
OracleCallableStatement ps =
(OracleCallableStatement )conn.prepareCall
( "begin give_me_an_array(?,?); end;" );
ps.setARRAY( 1, array_to_pass );
ps.registerOutParameter( 2, OracleTypes.ARRAY,"PERSON_TAB" );
ps.execute();
oracle.sql.ARRAY returnArray = (oracle.sql.ARRAY)ps.getArray(2);
Object[] personDetails = (Object[]) returnArray.getArray();
Person person_record = new Person();
for (int i = 0; i < personDetails.length; i++) {
person_record = (Person)personDetails;
System.out.println( "row " + i + " = '" + person_record.person_name +"'" );
public static void main (String args[]){
try
ArrayDemo tfc = new ArrayDemo();
tfc.passArray();
catch(Exception e) {
e.printStackTrace();
public static Connection getConnection() {
try
Class.forName ("oracle.jdbc.OracleDriver");
return DriverManager.getConnection("jdbc:oracle:thin:@<<HostNanem>>:1523:VIS",
"username", "password");
catch(Exception SQLe) {
System.out.println("IN EXCEPTION BLOCK ");
return null;
and thats it. you are done.
Hope it atleast helps people to get started. Comments are appreciated. I can be reached at ([email protected]) or [email protected]
Thanks
Sunil.sHi Sunil,
I've a similar situation where I'm trying to insert Java objects in db using bulk insert. My issue is with performance for which I've created a new thread.
http://forum.java.sun.com/thread.jspa?threadID=5270260&tstart=30
I ran into your code and looked into it. You've used the Person object array and directly passing it to the oracle.sql.ARRAY constructor. Just curios if this works, cos my understanding is that you need to create a oracle.sql.STRUCT out of ur java object collection and pass it to the ARRAY constructor. I tried ur way but got this runtime exception.
java.sql.SQLException: Fail to convert to internal representation: JavaBulkInsertNew$Option@10bbf9e
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146)
at oracle.jdbc.oracore.OracleTypeADT.toDatum(OracleTypeADT.java:239)
at oracle.jdbc.oracore.OracleTypeADT.toDatumArray(OracleTypeADT.java:274)
at oracle.jdbc.oracore.OracleTypeUPT.toDatumArray(OracleTypeUPT.java:115)
at oracle.sql.ArrayDescriptor.toOracleArray(ArrayDescriptor.java:1314)
at oracle.sql.ARRAY.<init>(ARRAY.java:152)
at JavaBulkInsertNew.main(JavaBulkInsertNew.java:76)
Here's a code snippet I used :
Object optionVal[] = {optionArr[0]}; // optionArr[0] is an Option object which has three properties
oracle.sql.ArrayDescriptor empArrayDescriptor = oracle.sql.ArrayDescriptor.createDescriptor("TT_EMP_TEST",conn);
ARRAY empArray = new ARRAY(empArrayDescriptor,conn,optionVal);If you visit my thread, u'll see that I'm using STRUCT and then pass it to the ARRAY constructor, which works well, except for the performance issue.
I'll appreciate if you can provide some information.
Regards,
Shamik -
I want to convert a String into an array of bytes
I am working with telnet programming with java, where I want to convert login name and password of an online user in 'String' format to 'Bytes', plz help me. Which Input or Output Stream I can use
Assuming you've got the username / password into a String object, you can convert it to a byte[] array using this method.
String.getBytes();
Look at the String API
http://java.sun.com/j2se/1.3/docs/api/java/lang/String.html
Hope that helps. -
Assigning javascript array with jsp array
hi,
I have a jsp page where I have a array in jsp. I want to assign the values to an javascipt array. how can I do that?
the reason why I want to do this is for a perticular problem I am facing in javascript. that is....
I have a text box in my jsp page, I want the value entered in that box to be checked (whether it exists ) against a hidden string which has some value. I want that hidden string not to be shown to the user even on seeing the html source. that is why I want these values to be stored and checked against a array object of javascript.
any suggestion is appreciated
Thanks
AshutoshHai asutoshdash
if you dont mind of viewing code u can use this else dont use, its not matters weatehr user will see you code or not if the user is professiona then its a big issue normal users not think of is for this dont send valuable infos like password etc to client u may send usernames
ok to create a java array to javascript array do this (i took example of db to array ) write this inside <script> <%codes here%> </script>
var aUsername =new array();
<%
int i=0;
while (rs.next())
%>
aUsername[<%= ++i%>] = "<%= rs.getString("User_Name")%>";
<%
%>thats it use this array where ever you want in your client side(javascript ) usage
hope this will help you
archi -
Q: 2-dim java Array to SQL rowtype?
I wrote a piece of software that enables access from SQL to OpenCyc (the worlds largest common sense knowledge base). (see http://www.opencyc.org/ and http://217.117.225.187/~yeb/ooi.pdf and for the code http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/opencyc/oracle/ )
It allows for queries like
SELECT * FROM TABLE(
SELECT cyc.askWithVariable( '(#$isa ?X #$Person)', '?X' ) FROM DUAL)
It uses java to connect to opencyc. In the example above, askWithVariable returns an oracle.sql.ARRAY, that is constructed like this:
ArrayDescriptor desc = ArrayDescriptor.createDescriptor("CYCLIST_TYPE", conn);
oracle.sql.ARRAY arrayanswer = new oracle.sql.ARRAY(desc, conn, cyclist.toArray());
The CYCLIST_TYPE is a TABLE OF VARCHAR(4000).
The call specification maps this cyclist_type to oracle.sql.ARRAY, so it can be used in queries like the example above.
Yesterday I've been trying (but not succeeding) to make a variant that returns a list of more than one variable; two dimensional array.
Q1: Nowhere I've seen a multi column example of the select * from table( a collection ) construct. Is this possible at all?
Q2: Is there a java example of a 2 dimensional array that gets converted to a PL/SQL or SQL type?
Thanks!
Yeb HavingaBut when I was created stored procedure, array and customised data type with in package, java throws an exception like an invalid pattern You will have to create array type outside the package to make it work.
Retruning array from plsql to java
http://otn.oracle.com/sample_code/tech/java/codesnippet/jdbc/varray/index.html
Writing array from java to plsql
http://asktom.oracle.com/pls/ask/f?p=4950:8:385799930469889632::NO::F4950_P8_DISPLAYID,F4950_P8_CRITERIA:712625135727,
Chandar -
Convert JPA Query getResultList to Array
I have been struggling with this problem for several hours now. All I have succeeded in doing is attempt every possible way to convert a List into an array and I just get errors.
// create native SQL query
Query q = em.createNativeQuery("SELECT * FROM Project p");
// get and process the results
List<Project> list = q.getResultList();
Project[] retVal = new Project[list.size()];
for (int i = 0; i < list.size(); i++)
retVal[i] = list.get(i);
}One would assume this to work, however this generates a ClassCastException, cannot convert Object to Project, oddly because as far as I can see everything in the code is strongly typed. I think Persistence fills the typed List with Object and not Project??
So I tried:
Project[] retVal = list.toArray(new Project[0]);This generates an ArrayStoreException.
Finally I tried the basic, should generate x-lint warning:
Project[] retVal = (Project[])(list.toArray());This also return ClassCastException, same reason as the first attempt.
I want my WebService function to return a standard Project[] not the java.lang.List class. But it seems JPA queries only support getting a List. I have googled to no end for a solution. Help appreciated!
Thanks.You are almost right, you can solve this two ways as below:
First, use native query with result class reference.
Second, use JPA query with createQuery method.
Both the options should work, see code below:
// First option, create native SQL query with result class reference.
Query q = em.createNativeQuery("SELECT * FROM Project p",Project.class);
// Second option, Create JPA Query.
// Query q = em.createQuery("SELECT p FROM Project p");
// get and process the results
List<Project> list = q.getResultList();
// Putting result to an array
Project[] retVal = new Project[list.size()];
list.toArray(retVal);*Cheers,
typurohit* (Tejas Purohit) -
How to convert an int array to string array?
Hi,
Can anyone please help me with this question?
int number={4,6,45,3,2,77};
I like to convert this into a list and sort
List mylist = Arrays.asList(number);
Collections.sort(mylist);
But first I need to convert the int array to String array.
Please advise. Thanks.If you want to convert your int array to a String array, you have no choice but doing a conversion element by element in a for loop.
However, if the sort method doesn't behave as desired, you can use the one with 2 parameters, the second parameter being a comparator class.
Check the javadoc for more information : http://java.sun.com/j2se/1.3/docs/api/java/util/Collections.html
/Stephane
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