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Collection Storing problem

 
Greenhorn
Posts: 6
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//Bean Object
public class BeanVO {
private String a;
private String b;
private String c;

public String geta (){return a;}
public void setA(String a) {this.a=a};
public String getB (){return b;}
public void setB(String b) {this.b=b};
public String getC (){return c;}
public void setC(String c) {this.c=c};
}

//Form bean
public class MyForm extends ActionForm{
private BeanVO beanVO;
private String submit; //submit property of html:button

public String getSubmit (){return submit;}
public void setSubmit(String submit) {this.submit=submit};

public MyForm (){
beanVO = new BeanVO();
}

public BeanVO getBeanVO(){ return beanVO;}
public void setBeanVO(){ this.beanVO = beanVO;}
}

//Action Class
pubic class MyAction extends Action {
ActionForward execute(.....){
MyForm form = (ActionForm)MyForm;
if (form!=null){
String action = form.getSubmit();
if (action == null){
this.loadForm(req,form);//this method will get the sql data and display in jsp
return mapping.findForward("success");
}
if ("Save".equals(action)){
this.updateForm(req,form);
return mapping.findForward("save");
}

public void loadForm(HttpServletRequest req, ActionForm actionForm){
//get collection of other objects from databaseand extract field a,b,c of other objects
//and put them in Collection<BeanVO> then set this collection in session
//for loading them in jsp to display to web browser
Collection<MyObject> myObjectCollection = new Collection<MyObject>();
Collection<OtherObject> records = retriveFromDAO(baseOnSomeCriteriaField);
Iterator<OtherObject> iter = records.iterator();
while(iter.hasNext()){
MyObject myObject = new MyObject();
myObject.setA(iter.getFielda);
myObject.setB(iter.getFieldB);
myObjectCollection.add(myObject);
}
setSessionObject(req,"myObjectCollection",myObjectCollection);
}

//when some value is entered in textbox c and
//Save button is clicked updateForm is called
public void updateForm(HttpServletRequest req, ActionForm actionForm){
//get the MyObject Collection from session stored in loadForm
Collection<MyObject> myObjectCollection = (Collection<MyObject>)
getSessionObject(req,"myObjectCollection");
MyForm form = (ActionForm) MyForm;
//here comes the null problem: after ** execute,
// c is null when I Step over the Eclipse debug mode
String c = form.getMyObject().getC(); //**
//could not do any thing at thispoint until I can get some value from c
// the rest is held because of this problem
}
}

//JSP

public class MyJsp {
-----skip the long unrelated issues----
---some common header and body from tiles

<html:form action="/myAction.do" method="post">
some craps.....
//here come the logic:iterate over the myObjectCollection
<table>
<tr><th>A</th><th>B</th><th>C</th></tr>
<logic:iterate id="myObject" name="myObjectCollection" >
<tr>
<td><html:text><bean:write name="myObject" property="a"/><td>
<td><html:text><bean:write name="myObject" property="b"/><td>
<td><html:text><bean:write name="myObject" property="c"/><td>
</tr>
</logic:iterate>

<tr>
<td>
<html:submit property="submit" value="Save"/>
</td>
</tr>
</table>
</html:form>

In summary, I was able to load all the instances in myObjectCollection in jsp.
But when I entered some value in text box c and hit Save button, I went back
to eclipse debug mode and see String c = form.getMyObject().getC() is null

To test the MyForm class, I also put in the property c
so that i can use String c = form.getC(); but it is also null.

Please help. I would be very greatful for all the ideas and suggestions to
make this work. Thanks



 
Author
Posts: 12617
IntelliJ IDE Ruby
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Please UseCodeTags. Unformatted code/config/etc. is difficult to read. You can edit your post to include them using the button or re-post the question with proper formatting.
 
Thomas Bui
Greenhorn
Posts: 6
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//Bean Object


public class BeanVO {
private String a;
private String b;
private String c;

public String geta (){return a;}
public void setA(String a) {this.a=a};
public String getB (){return b;}
public void setB(String b) {this.b=b};
public String getC (){return c;}
public void setC(String c) {this.c=c};
}



//Form bean


public class MyForm extends ActionForm{
private BeanVO beanVO;
private String submit; //submit property of html:button

public String getSubmit (){return submit;}
public void setSubmit(String submit) {this.submit=submit};

public MyForm (){
beanVO = new BeanVO();
}

public BeanVO getBeanVO(){ return beanVO;}
public void setBeanVO(){ this.beanVO = beanVO;}
}



//Action Class


pubic class MyAction extends Action {
ActionForward execute(.....){
MyForm form = (ActionForm)MyForm;
if (form!=null){
String action = form.getSubmit();
if (action == null){
this.loadForm(req,form);//this method will get the sql data and display in jsp
return mapping.findForward("success");
}
if ("Save".equals(action)){
this.updateForm(req,form);
return mapping.findForward("save");
}

public void loadForm(HttpServletRequest req, ActionForm actionForm){
//get collection of other objects from databaseand extract field a,b,c of other objects
//and put them in Collection<BeanVO> then set this collection in session
//for loading them in jsp to display to web browser
Collection<MyObject> myObjectCollection = new Collection<MyObject>();
Collection<OtherObject> records = retriveFromDAO(baseOnSomeCriteriaField);
Iterator<OtherObject> iter = records.iterator();
while(iter.hasNext()){
MyObject myObject = new MyObject();
myObject.setA(iter.getFielda);
myObject.setB(iter.getFieldB);
myObjectCollection.add(myObject);
}
setSessionObject(req,"myObjectCollection",myObjectCollection);
}

//when some value is entered in textbox c and
//Save button is clicked updateForm is called
public void updateForm(HttpServletRequest req, ActionForm actionForm){
//get the MyObject Collection from session stored in loadForm
Collection<MyObject> myObjectCollection = (Collection<MyObject>)
getSessionObject(req,"myObjectCollection");
MyForm form = (ActionForm) MyForm;
//here comes the null problem: after ** execute,
// c is null when I Step over the Eclipse debug mode
String c = form.getMyObject().getC(); //**
//could not do any thing at thispoint until I can get some value from c
// the rest is held because of this problem
}
}




//JSP


public class MyJsp {
-----skip the long unrelated issues----
---some common header and body from tiles

<html:form action="/myAction.do" method="post">
some craps.....
//here come the logic:iterate over the myObjectCollection
<table>
<tr><th>A</th><th>B</th><th>C</th></tr>
<logic:iterate id="myObject" name="myObjectCollection" >
<tr>
<td><html:text><bean:write name="myObject" property="a"/><td>
<td><html:text><bean:write name="myObject" property="b"/><td>
<td><html:text><bean:write name="myObject" property="c"/><td>
</tr>
</logic:iterate>

<tr>
<td>
<html:submit property="submit" value="Save"/>
</td>
</tr>
</table>
</html:form>



In summary, I was able to load all the instances in myObjectCollection in jsp.
But when I entered some value in text box c and hit Save button, I went back
to eclipse debug mode and see String c = form.getMyObject().getC() is null

To test the MyForm class, I also put in the property c
so that i can use String c = form.getC(); but it is also null.

Please help. I would be very greatful for all the ideas and suggestions to
make this work. Thanks
 
David Newton
Author
Posts: 12617
IntelliJ IDE Ruby
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Those are "quote" tags, not "code" tags.That shouldn't even compile.
 
Thomas Bui
Greenhorn
Posts: 6
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<logic:iterate id="myObject" name="myObjectCollection" >
<tr>
<td><html:text><bean:write name="myObject" property="a"/><td>
<td><html:text><bean:write name="myObject" property="b"/><td>
<td><html:text><bean:write name="myObject"

property="c" disable="true"/

><td>
</tr>
</logic:iterate>



Thanks for your reply. I am able to populate them to the jsp and display to the browser. I wonder if setting the textbox not editable is the problem of getting back the value on the form. I am able to get the value from box b but not c.
The problem is box c is not editable. It will get the sum from a+b using the javascript. Can you give me some idea? Thanks
 
Thomas Bui
Greenhorn
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Thanks for your reply. I got all the collection in the form resolved but now I am facing the new problem.
I am using logic:iterate on a different collection and put the objects in my collection which is a property of my form bean and set it in session. When I populate the form bean's collection, it gets displayed properly. But, when I get the sesion back and try to update and retrieve it back in my action, I only get the first object in my collection and the rest are null. Please help. Thanks

 
David Newton
Author
Posts: 12617
IntelliJ IDE Ruby
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Please start a new thread and post the code. With *code* tags.
 
Don't get me started about those stupid light bulbs.
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