RE: Iterate Tag Question
Does anyone have any suggestions on how I can compare the previous object's parameters to determine when my object's category has changed? -Original Message- From: Jones, Marty B. Sent: Friday, August 15, 2003 7:07 AM To: [EMAIL PROTECTED] Subject: Iterate Tag Question I am using an iterate tag to iterate over a List of items that have a given category. I need to be able to determine when a given category has changed when iterating and push out a header row in a table that I am generating. Is there a way that I can look back a row or save the category from the previous row so that I can compare it with the current row to determine whether or not a category break has occurred. Here is a snippet of my code: % String previousCategory = empty; % table width=100% border=1 cellspacing=0 cellpadding=3 frame=hsides tr th align=left nowrapFilename/th th align=centerDescription/th /tr logic:iterate id=currElement name=dbFileBean property=records indexId=index logic:notEqual name=currElement.categoryName value=%=previousCategory% tr td colspan=6 class=groupBreakbbean:write name=currElement property=categoryDesc//ba name=bean:write name=currElement property=categoryName//a/td /tr /logic:notEqual tr bgcolor=%=colors[index.intValue()%2]% td align=left nowrapimg src=/images/common/spacer.gif width=15 height=10 a href=documentsandfiles?fileId=bean:write name=currElement property=fileId/bean:write name=currElement property=fileName//a /td td align=left bean:write name=currElement property=description/ /td /tr % previousCategory = ((DbFileInfo)currElement).getCategoryName();% /logic:iterate /table The way that I am attempting it from above is not working, the notEqual tag is not seeing that the strings are equal. I would like to be able to get all the scriplets out of the jsp if possible. Any suggestions would be appreciated. Marty B. Jones Senior Software Engineer DailyAccess.Com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Iterate Tag Question
You can implement this just as you would in any other programming environment: by saving the previous and the current value in different variables. You can do this using scriptlets, as I see you doing here. You can also do this using the JSTL (for more info, see the Jakarta Taglibs project), which you may find a little easier to work with once you get the hang of it. Does that answer your question? Matt Jones, Marty B. wrote: Does anyone have any suggestions on how I can compare the previous object's parameters to determine when my object's category has changed? -Original Message- From: Jones, Marty B. Sent: Friday, August 15, 2003 7:07 AM To: [EMAIL PROTECTED] Subject: Iterate Tag Question I am using an iterate tag to iterate over a List of items that have a given category. I need to be able to determine when a given category has changed when iterating and push out a header row in a table that I am generating. Is there a way that I can look back a row or save the category from the previous row so that I can compare it with the current row to determine whether or not a category break has occurred. Here is a snippet of my code: % String previousCategory = empty; % table width=100% border=1 cellspacing=0 cellpadding=3 frame=hsides tr th align=left nowrapFilename/th th align=centerDescription/th /tr logic:iterate id=currElement name=dbFileBean property=records indexId=index logic:notEqual name=currElement.categoryName value=%=previousCategory% tr td colspan=6 class=groupBreakbbean:write name=currElement property=categoryDesc//ba name=bean:write name=currElement property=categoryName//a/td /tr /logic:notEqual tr bgcolor=%=colors[index.intValue()%2]% td align=left nowrapimg src=/images/common/spacer.gif width=15 height=10 a href=documentsandfiles?fileId=bean:write name=currElement property=fileId/bean:write name=currElement property=fileName//a /td td align=left bean:write name=currElement property=description/ /td /tr % previousCategory = ((DbFileInfo)currElement).getCategoryName();% /logic:iterate /table The way that I am attempting it from above is not working, the notEqual tag is not seeing that the strings are equal. I would like to be able to get all the scriplets out of the jsp if possible. Any suggestions would be appreciated. Marty B. Jones Senior Software Engineer DailyAccess.Com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Iterate Tag Question
Matt, Yes it does. I was hoping to get rid of scriplets if possible. I cannot use JSTL yet because our jsp container does not support the jsp 1.2 spec. (Jrun 3.1). We are going to migrate to Jrun 4 soon which supports the jsp 1.2 spec so I will be able to use JSTL then. Guess I will have to use scriplets until then. Thanks, Marty -Original Message- From: Sgarlata Matt [mailto:[EMAIL PROTECTED] Sent: Friday, August 15, 2003 11:02 AM To: Struts Users Mailing List Subject: Re: Iterate Tag Question You can implement this just as you would in any other programming environment: by saving the previous and the current value in different variables. You can do this using scriptlets, as I see you doing here. You can also do this using the JSTL (for more info, see the Jakarta Taglibs project), which you may find a little easier to work with once you get the hang of it. Does that answer your question? Matt Jones, Marty B. wrote: Does anyone have any suggestions on how I can compare the previous object's parameters to determine when my object's category has changed? -Original Message- From: Jones, Marty B. Sent: Friday, August 15, 2003 7:07 AM To: [EMAIL PROTECTED] Subject: Iterate Tag Question I am using an iterate tag to iterate over a List of items that have a given category. I need to be able to determine when a given category has changed when iterating and push out a header row in a table that I am generating. Is there a way that I can look back a row or save the category from the previous row so that I can compare it with the current row to determine whether or not a category break has occurred. Here is a snippet of my code: % String previousCategory = empty; % table width=100% border=1 cellspacing=0 cellpadding=3 frame=hsides tr th align=left nowrapFilename/th th align=centerDescription/th /tr logic:iterate id=currElement name=dbFileBean property=records indexId=index logic:notEqual name=currElement.categoryName value=%=previousCategory% tr td colspan=6 class=groupBreakbbean:write name=currElement property=categoryDesc//ba name=bean:write name=currElement property=categoryName//a/td /tr /logic:notEqual tr bgcolor=%=colors[index.intValue()%2]% td align=left nowrapimg src=/images/common/spacer.gif width=15 height=10 a href=documentsandfiles?fileId=bean:write name=currElement property=fileId/bean:write name=currElement property=fileName//a /td td align=left bean:write name=currElement property=description/ /td /tr % previousCategory = ((DbFileInfo)currElement).getCategoryName(); % /logic:iterate /table The way that I am attempting it from above is not working, the notEqual tag is not seeing that the strings are equal. I would like to be able to get all the scriplets out of the jsp if possible. Any suggestions would be appreciated. Marty B. Jones Senior Software Engineer DailyAccess.Com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: iterate tag question
Is the / at the end there in real code? logic:iterate id=usersAttrib name=usersAttrib / If yes then remove it... and try. Thanks. -Vinay -Original Message- From: Per Lovdinger [mailto:[EMAIL PROTECTED] Sent: Wednesday, May 28, 2003 8:00 PM To: [EMAIL PROTECTED] Subject: iterate tag question Hi there, I'm Struts newie and have a question about the iterate tag. When I'm creating an ArrayList with 2 objects. For some reason only one show up. What am I doing wrong ? I've attached the jsp page. thanks in advance __ Do you Yahoo!? Yahoo! Calendar - Free online calendar with sync to Outlook(TM). http://calendar.yahoo.com --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.483 / Virus Database: 279 - Release Date: 5/19/2003 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.483 / Virus Database: 279 - Release Date: 5/19/2003 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Iterate tag question
String[] is just an array of String. It has no iterator. You need a
Collection, List or Enumeration.
- Original Message -
From: Rea, Ron [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Friday, September 27, 2002 1:35 PM
Subject: Iterate tag question
I am trying to iterate through several array fields on my Form within the
JSP, display the properties as a table on the page. Using arrays should
allow me to update the table data, however I cannot seem to get the
iterate
tag to work. The following is an example of what I'm doing. Any ideas on
how this iterate tag should look - I'm just trying to go through the
array,
held in the ActionForm, and display each occurance as a row in the JSP.
ResponseProcessForm:
public void setMsgCode(String[] msgCode) {
this.msgCode = msgCode;
}
public String[] getMsgCode() {
return msgCode;
}
public void setMsgDesc(String[] msgDesc) {
this.msgDesc = msgDesc;
}
public String[] getMsgDesc() {
return msgDesc;
}
section of JSP:
logic:iterate id=grid
name=responseProcessForm
property=msgCode
td bean:write name=grid property=msgCode
filter=true/ nbsp;/td
tdhtml:text property=msgDesc size=6
maxlength=6 /nbsp;/td
/logic:iterate
Using this code gives me this error: javax.servlet.ServletException: No
getter method for property msgCode of bean grid
Thanks!
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RE: Iterate tag question
I originally had it as an arraylist of these properties, but using an
ArrayList in the Iterate tag prevents me from being able to edit the
individual table row data, then hit one submit button at the end. Any
changes are lost.
I tried following Husted's instructions on how to do this, found at this
link: http://www.husted.com/struts/tips/006.html, but the instructions are
not complete enough and I cannot get the iterate tag to work.
-Original Message-
From: John Owen [mailto:[EMAIL PROTECTED]]
Sent: Friday, September 27, 2002 12:03 PM
To: Struts Users Mailing List
Subject: Re: Iterate tag question
String[] is just an array of String. It has no iterator. You need a
Collection, List or Enumeration.
- Original Message -
From: Rea, Ron [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Friday, September 27, 2002 1:35 PM
Subject: Iterate tag question
I am trying to iterate through several array fields on my Form within the
JSP, display the properties as a table on the page. Using arrays should
allow me to update the table data, however I cannot seem to get the
iterate
tag to work. The following is an example of what I'm doing. Any ideas on
how this iterate tag should look - I'm just trying to go through the
array,
held in the ActionForm, and display each occurance as a row in the JSP.
ResponseProcessForm:
public void setMsgCode(String[] msgCode) {
this.msgCode = msgCode;
}
public String[] getMsgCode() {
return msgCode;
}
public void setMsgDesc(String[] msgDesc) {
this.msgDesc = msgDesc;
}
public String[] getMsgDesc() {
return msgDesc;
}
section of JSP:
logic:iterate id=grid
name=responseProcessForm
property=msgCode
td bean:write name=grid property=msgCode
filter=true/ nbsp;/td
tdhtml:text property=msgDesc size=6
maxlength=6 /nbsp;/td
/logic:iterate
Using this code gives me this error: javax.servlet.ServletException: No
getter method for property msgCode of bean grid
Thanks!
--
To unsubscribe, e-mail:
mailto:[EMAIL PROTECTED]
For additional commands, e-mail:
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RE: Iterate tag question
-Original Message-
From: Rea, Ron [mailto:[EMAIL PROTECTED]]
Sent: Friday, September 27, 2002 12:05 PM
To: 'Struts Users Mailing List'
Subject: RE: Iterate tag question
I originally had it as an arraylist of these properties, but using an
ArrayList in the Iterate tag prevents me from being able to edit the
First, how would using an ArrayList prevent you from doing any edits you could do with
an array? Edit within the action, right?
Second, in your snippet, you are using html:text, which expects a single Object, but
your getter is returning a String[]. Not what you want to do. If you really want to
use an array here, make it an array of a tuple object (even with an ArrayList, this is
the way to do it)...one that has getCode() and getDesc() methods. Then you iterate
through these objects, outputting your code and description. Don't use two string
arrays or two ArrayLists.
peace,
Joe
individual table row data, then hit one submit button at the end. Any
changes are lost.
I tried following Husted's instructions on how to do this,
found at this
link: http://www.husted.com/struts/tips/006.html, but the
instructions are
not complete enough and I cannot get the iterate tag to work.
-Original Message-
From: John Owen [mailto:[EMAIL PROTECTED]]
Sent: Friday, September 27, 2002 12:03 PM
To: Struts Users Mailing List
Subject: Re: Iterate tag question
String[] is just an array of String. It has no iterator. You need a
Collection, List or Enumeration.
- Original Message -
From: Rea, Ron [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Friday, September 27, 2002 1:35 PM
Subject: Iterate tag question
I am trying to iterate through several array fields on my
Form within the
JSP, display the properties as a table on the page. Using
arrays should
allow me to update the table data, however I cannot seem to get the
iterate
tag to work. The following is an example of what I'm
doing. Any ideas on
how this iterate tag should look - I'm just trying to go through the
array,
held in the ActionForm, and display each occurance as a
row in the JSP.
ResponseProcessForm:
public void setMsgCode(String[] msgCode) {
this.msgCode = msgCode;
}
public String[] getMsgCode() {
return msgCode;
}
public void setMsgDesc(String[] msgDesc) {
this.msgDesc = msgDesc;
}
public String[] getMsgDesc() {
return msgDesc;
}
section of JSP:
logic:iterate id=grid
name=responseProcessForm
property=msgCode
td bean:write name=grid
property=msgCode
filter=true/ nbsp;/td
tdhtml:text property=msgDesc size=6
maxlength=6 /nbsp;/td
/logic:iterate
Using this code gives me this error:
javax.servlet.ServletException: No
getter method for property msgCode of bean grid
Thanks!
--
To unsubscribe, e-mail:
mailto:[EMAIL PROTECTED]
For additional commands, e-mail:
mailto:[EMAIL PROTECTED]
--
To unsubscribe, e-mail: mailto:[EMAIL PROTECTED]
For additional commands, e-mail: mailto:[EMAIL PROTECTED]
RE: Iterate tag question
If you have a working example of how I could actually modify properties
presented through an ArrayList, I would be forever grateful g to see that.
I have no problem presenting an ArrayList of properties, but everything I
have read indicates that you have to nead an edit button on each row in
order to send changed data back to the Action class. Our users want a table
of data presented back to them, where they can make changes to each row,
then hit submit at the end and have the Action class update the data table
with the edits. Unfortunately, I have not been able to do this using an
ArrayList, and I think the link to Husted's site indicated the same, but
maybe I'm wrong. If you have, I'd really like to know how you did it.
Thanks!
-Original Message-
From: Joe Barefoot [mailto:[EMAIL PROTECTED]]
Sent: Friday, September 27, 2002 12:15 PM
To: Struts Users Mailing List
Subject: RE: Iterate tag question
-Original Message-
From: Rea, Ron [mailto:[EMAIL PROTECTED]]
Sent: Friday, September 27, 2002 12:05 PM
To: 'Struts Users Mailing List'
Subject: RE: Iterate tag question
I originally had it as an arraylist of these properties, but using an
ArrayList in the Iterate tag prevents me from being able to edit the
First, how would using an ArrayList prevent you from doing any edits you
could do with an array? Edit within the action, right?
Second, in your snippet, you are using html:text, which expects a single
Object, but your getter is returning a String[]. Not what you want to do.
If you really want to use an array here, make it an array of a tuple object
(even with an ArrayList, this is the way to do it)...one that has getCode()
and getDesc() methods. Then you iterate through these objects, outputting
your code and description. Don't use two string arrays or two ArrayLists.
peace,
Joe
individual table row data, then hit one submit button at the end. Any
changes are lost.
I tried following Husted's instructions on how to do this,
found at this
link: http://www.husted.com/struts/tips/006.html, but the
instructions are
not complete enough and I cannot get the iterate tag to work.
-Original Message-
From: John Owen [mailto:[EMAIL PROTECTED]]
Sent: Friday, September 27, 2002 12:03 PM
To: Struts Users Mailing List
Subject: Re: Iterate tag question
String[] is just an array of String. It has no iterator. You need a
Collection, List or Enumeration.
- Original Message -
From: Rea, Ron [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Friday, September 27, 2002 1:35 PM
Subject: Iterate tag question
I am trying to iterate through several array fields on my
Form within the
JSP, display the properties as a table on the page. Using
arrays should
allow me to update the table data, however I cannot seem to get the
iterate
tag to work. The following is an example of what I'm
doing. Any ideas on
how this iterate tag should look - I'm just trying to go through the
array,
held in the ActionForm, and display each occurance as a
row in the JSP.
ResponseProcessForm:
public void setMsgCode(String[] msgCode) {
this.msgCode = msgCode;
}
public String[] getMsgCode() {
return msgCode;
}
public void setMsgDesc(String[] msgDesc) {
this.msgDesc = msgDesc;
}
public String[] getMsgDesc() {
return msgDesc;
}
section of JSP:
logic:iterate id=grid
name=responseProcessForm
property=msgCode
td bean:write name=grid
property=msgCode
filter=true/ nbsp;/td
tdhtml:text property=msgDesc size=6
maxlength=6 /nbsp;/td
/logic:iterate
Using this code gives me this error:
javax.servlet.ServletException: No
getter method for property msgCode of bean grid
Thanks!
--
To unsubscribe, e-mail:
mailto:[EMAIL PROTECTED]
For additional commands, e-mail:
mailto:[EMAIL PROTECTED]
--
To unsubscribe, e-mail:
mailto:[EMAIL PROTECTED]
For additional commands, e-mail:
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RE: Iterate tag question
Okay, now I understand what you meant by edit. You might be right about needing to use an array in this case, as I have never had to do exactly what you're doing. So, if you want to proceed in this vein, I *think* you should do something like this: logic:iterate id=grid name=responseProcessForm property=msgCode indexID=index td bean:write name='responseProcessForm' property='%= msgCode[ + index.intValue() + ] %' filter='true'/ nbsp;/td tdhtml:text name='responseProcessForm' property='%= msgDesc[ + index.intValue() + ] %' size='6' maxlength=6 /nbsp;/td /logic:iterate Couple of things to note here: 1. You are only using the iterate tag to get the index value. Your two arrays must be of the same length of course, and it doesn't matter which one you iterate through. 2. You are not using the id attribute of the iterage tag at all, but I *think* it's required, so I left it there. 3. The index is actually a big Integer, hence the intValue() method call. 4. The attributes have single quotes around them for a reason. There are String literals embedded in the JSP expressions in the attributes...usually the double quotes confuse the JSP compiler, so I put single quotes around the attribute value itself. This is valid, but you can't mix usage within a tag (i.e. single and double for attributes) 5. You may want to replace the String literals I have used with prefix/suffix variables created from bean:define tags. That was you can eliminate some of the quotes and it might look cleaner to you. 6. (this is the important one) I've never had to do this, but AFAIK this should work just fine. 7. Hey, let me know if this works. ;) peace, Joe -Original Message- From: Rea, Ron [mailto:[EMAIL PROTECTED]] Sent: Friday, September 27, 2002 12:29 PM To: 'Struts Users Mailing List' Subject: RE: Iterate tag question If you have a working example of how I could actually modify properties presented through an ArrayList, I would be forever grateful g to see that. I have no problem presenting an ArrayList of properties, but everything I have read indicates that you have to nead an edit button on each row in order to send changed data back to the Action class. Our users want a table of data presented back to them, where they can make changes to each row, then hit submit at the end and have the Action class update the data table with the edits. Unfortunately, I have not been able to do this using an ArrayList, and I think the link to Husted's site indicated the same, but maybe I'm wrong. If you have, I'd really like to know how you did it. Thanks! -Original Message- From: Joe Barefoot [mailto:[EMAIL PROTECTED]] Sent: Friday, September 27, 2002 12:15 PM To: Struts Users Mailing List Subject: RE: Iterate tag question -Original Message- From: Rea, Ron [mailto:[EMAIL PROTECTED]] Sent: Friday, September 27, 2002 12:05 PM To: 'Struts Users Mailing List' Subject: RE: Iterate tag question I originally had it as an arraylist of these properties, but using an ArrayList in the Iterate tag prevents me from being able to edit the First, how would using an ArrayList prevent you from doing any edits you could do with an array? Edit within the action, right? Second, in your snippet, you are using html:text, which expects a single Object, but your getter is returning a String[]. Not what you want to do. If you really want to use an array here, make it an array of a tuple object (even with an ArrayList, this is the way to do it)...one that has getCode() and getDesc() methods. Then you iterate through these objects, outputting your code and description. Don't use two string arrays or two ArrayLists. peace, Joe individual table row data, then hit one submit button at the end. Any changes are lost. I tried following Husted's instructions on how to do this, found at this link: http://www.husted.com/struts/tips/006.html, but the instructions are not complete enough and I cannot get the iterate tag to work. -Original Message- From: John Owen [mailto:[EMAIL PROTECTED]] Sent: Friday, September 27, 2002 12:03 PM To: Struts Users Mailing List Subject: Re: Iterate tag question String[] is just an array of String. It has no iterator. You need a Collection, List or Enumeration. - Original Message - From: Rea, Ron [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Friday, September 27, 2002 1:35 PM Subject: Iterate tag question I am trying to iterate through several array fields on my Form within the JSP, display the properties as a table on the page. Using arrays should allow me to update the table data, however I cannot seem to get the iterate tag to work. The following is an example of what I'm doing. Any ideas on how this iterate tag should look - I'm just trying
RE: Iterate tag question
Thanks Joe!! I'll give this a shot and let you know... Ron -Original Message- From: Joe Barefoot [mailto:[EMAIL PROTECTED]] Sent: Friday, September 27, 2002 1:04 PM To: Struts Users Mailing List Subject: RE: Iterate tag question Okay, now I understand what you meant by edit. You might be right about needing to use an array in this case, as I have never had to do exactly what you're doing. So, if you want to proceed in this vein, I *think* you should do something like this: logic:iterate id=grid name=responseProcessForm property=msgCode indexID=index td bean:write name='responseProcessForm' property='%= msgCode[ + index.intValue() + ] %' filter='true'/ nbsp;/td tdhtml:text name='responseProcessForm' property='%= msgDesc[ + index.intValue() + ] %' size='6' maxlength=6 /nbsp;/td /logic:iterate Couple of things to note here: 1. You are only using the iterate tag to get the index value. Your two arrays must be of the same length of course, and it doesn't matter which one you iterate through. 2. You are not using the id attribute of the iterage tag at all, but I *think* it's required, so I left it there. 3. The index is actually a big Integer, hence the intValue() method call. 4. The attributes have single quotes around them for a reason. There are String literals embedded in the JSP expressions in the attributes...usually the double quotes confuse the JSP compiler, so I put single quotes around the attribute value itself. This is valid, but you can't mix usage within a tag (i.e. single and double for attributes) 5. You may want to replace the String literals I have used with prefix/suffix variables created from bean:define tags. That was you can eliminate some of the quotes and it might look cleaner to you. 6. (this is the important one) I've never had to do this, but AFAIK this should work just fine. 7. Hey, let me know if this works. ;) peace, Joe -Original Message- From: Rea, Ron [mailto:[EMAIL PROTECTED]] Sent: Friday, September 27, 2002 12:29 PM To: 'Struts Users Mailing List' Subject: RE: Iterate tag question If you have a working example of how I could actually modify properties presented through an ArrayList, I would be forever grateful g to see that. I have no problem presenting an ArrayList of properties, but everything I have read indicates that you have to nead an edit button on each row in order to send changed data back to the Action class. Our users want a table of data presented back to them, where they can make changes to each row, then hit submit at the end and have the Action class update the data table with the edits. Unfortunately, I have not been able to do this using an ArrayList, and I think the link to Husted's site indicated the same, but maybe I'm wrong. If you have, I'd really like to know how you did it. Thanks! -Original Message- From: Joe Barefoot [mailto:[EMAIL PROTECTED]] Sent: Friday, September 27, 2002 12:15 PM To: Struts Users Mailing List Subject: RE: Iterate tag question -Original Message- From: Rea, Ron [mailto:[EMAIL PROTECTED]] Sent: Friday, September 27, 2002 12:05 PM To: 'Struts Users Mailing List' Subject: RE: Iterate tag question I originally had it as an arraylist of these properties, but using an ArrayList in the Iterate tag prevents me from being able to edit the First, how would using an ArrayList prevent you from doing any edits you could do with an array? Edit within the action, right? Second, in your snippet, you are using html:text, which expects a single Object, but your getter is returning a String[]. Not what you want to do. If you really want to use an array here, make it an array of a tuple object (even with an ArrayList, this is the way to do it)...one that has getCode() and getDesc() methods. Then you iterate through these objects, outputting your code and description. Don't use two string arrays or two ArrayLists. peace, Joe individual table row data, then hit one submit button at the end. Any changes are lost. I tried following Husted's instructions on how to do this, found at this link: http://www.husted.com/struts/tips/006.html, but the instructions are not complete enough and I cannot get the iterate tag to work. -Original Message- From: John Owen [mailto:[EMAIL PROTECTED]] Sent: Friday, September 27, 2002 12:03 PM To: Struts Users Mailing List Subject: Re: Iterate tag question String[] is just an array of String. It has no iterator. You need a Collection, List or Enumeration. - Original Message - From: Rea, Ron [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Friday, September 27, 2002 1:35 PM Subject: Iterate tag question I am trying to iterate through several array fields on my Form within the JSP, display the properties as a table on the page. Using arrays
RE: Iterate tag question
Joe, This ammmst works. It displays the data just fine, but I get the following error when I hit submit: javax.servlet.ServletException: No collection found Seems that it wants a collection to iterate through?? What'cha think? Ron -Original Message- From: Joe Barefoot [mailto:[EMAIL PROTECTED]] Sent: Friday, September 27, 2002 1:04 PM To: Struts Users Mailing List Subject: RE: Iterate tag question Okay, now I understand what you meant by edit. You might be right about needing to use an array in this case, as I have never had to do exactly what you're doing. So, if you want to proceed in this vein, I *think* you should do something like this: logic:iterate id=grid name=responseProcessForm property=msgCode indexID=index td bean:write name='responseProcessForm' property='%= msgCode[ + index.intValue() + ] %' filter='true'/ nbsp;/td tdhtml:text name='responseProcessForm' property='%= msgDesc[ + index.intValue() + ] %' size='6' maxlength=6 /nbsp;/td /logic:iterate Couple of things to note here: 1. You are only using the iterate tag to get the index value. Your two arrays must be of the same length of course, and it doesn't matter which one you iterate through. 2. You are not using the id attribute of the iterage tag at all, but I *think* it's required, so I left it there. 3. The index is actually a big Integer, hence the intValue() method call. 4. The attributes have single quotes around them for a reason. There are String literals embedded in the JSP expressions in the attributes...usually the double quotes confuse the JSP compiler, so I put single quotes around the attribute value itself. This is valid, but you can't mix usage within a tag (i.e. single and double for attributes) 5. You may want to replace the String literals I have used with prefix/suffix variables created from bean:define tags. That was you can eliminate some of the quotes and it might look cleaner to you. 6. (this is the important one) I've never had to do this, but AFAIK this should work just fine. 7. Hey, let me know if this works. ;) peace, Joe -Original Message- From: Rea, Ron [mailto:[EMAIL PROTECTED]] Sent: Friday, September 27, 2002 12:29 PM To: 'Struts Users Mailing List' Subject: RE: Iterate tag question If you have a working example of how I could actually modify properties presented through an ArrayList, I would be forever grateful g to see that. I have no problem presenting an ArrayList of properties, but everything I have read indicates that you have to nead an edit button on each row in order to send changed data back to the Action class. Our users want a table of data presented back to them, where they can make changes to each row, then hit submit at the end and have the Action class update the data table with the edits. Unfortunately, I have not been able to do this using an ArrayList, and I think the link to Husted's site indicated the same, but maybe I'm wrong. If you have, I'd really like to know how you did it. Thanks! -Original Message- From: Joe Barefoot [mailto:[EMAIL PROTECTED]] Sent: Friday, September 27, 2002 12:15 PM To: Struts Users Mailing List Subject: RE: Iterate tag question -Original Message- From: Rea, Ron [mailto:[EMAIL PROTECTED]] Sent: Friday, September 27, 2002 12:05 PM To: 'Struts Users Mailing List' Subject: RE: Iterate tag question I originally had it as an arraylist of these properties, but using an ArrayList in the Iterate tag prevents me from being able to edit the First, how would using an ArrayList prevent you from doing any edits you could do with an array? Edit within the action, right? Second, in your snippet, you are using html:text, which expects a single Object, but your getter is returning a String[]. Not what you want to do. If you really want to use an array here, make it an array of a tuple object (even with an ArrayList, this is the way to do it)...one that has getCode() and getDesc() methods. Then you iterate through these objects, outputting your code and description. Don't use two string arrays or two ArrayLists. peace, Joe individual table row data, then hit one submit button at the end. Any changes are lost. I tried following Husted's instructions on how to do this, found at this link: http://www.husted.com/struts/tips/006.html, but the instructions are not complete enough and I cannot get the iterate tag to work. -Original Message- From: John Owen [mailto:[EMAIL PROTECTED]] Sent: Friday, September 27, 2002 12:03 PM To: Struts Users Mailing List Subject: Re: Iterate tag question String[] is just an array of String. It has no iterator. You need a Collection, List or Enumeration. - Original Message - From: Rea, Ron [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Friday, September 27, 2002 1:35 PM
RE: Iterate tag question
Yeah, I was afraid of something like that. :) Could you try replacing the two String arrays with two ArrayLists that contain your String objects? That should be pretty easy, just change the method signature in your Action, iterate through the array you already have to create the ArrayList, and return it. You won't need to change the JSP. Might work, might not. This is really the blind leading the blind at this point though...anybody else got a good handle on populating indexed properties from a form? An array or a Collection? peace, Joe P.S. You might try searching the mail archives for indexed properties or populating indexed properties, I'm pretty sure this has come up before. -Original Message- From: Rea, Ron [mailto:[EMAIL PROTECTED]] Sent: Friday, September 27, 2002 2:28 PM To: 'Struts Users Mailing List' Subject: RE: Iterate tag question Joe, This ammmst works. It displays the data just fine, but I get the following error when I hit submit: javax.servlet.ServletException: No collection found Seems that it wants a collection to iterate through?? What'cha think? Ron -Original Message- From: Joe Barefoot [mailto:[EMAIL PROTECTED]] Sent: Friday, September 27, 2002 1:04 PM To: Struts Users Mailing List Subject: RE: Iterate tag question Okay, now I understand what you meant by edit. You might be right about needing to use an array in this case, as I have never had to do exactly what you're doing. So, if you want to proceed in this vein, I *think* you should do something like this: logic:iterate id=grid name=responseProcessForm property=msgCode indexID=index td bean:write name='responseProcessForm' property='%= msgCode[ + index.intValue() + ] %' filter='true'/ nbsp;/td tdhtml:text name='responseProcessForm' property='%= msgDesc[ + index.intValue() + ] %' size='6' maxlength=6 /nbsp;/td /logic:iterate Couple of things to note here: 1. You are only using the iterate tag to get the index value. Your two arrays must be of the same length of course, and it doesn't matter which one you iterate through. 2. You are not using the id attribute of the iterage tag at all, but I *think* it's required, so I left it there. 3. The index is actually a big Integer, hence the intValue() method call. 4. The attributes have single quotes around them for a reason. There are String literals embedded in the JSP expressions in the attributes...usually the double quotes confuse the JSP compiler, so I put single quotes around the attribute value itself. This is valid, but you can't mix usage within a tag (i.e. single and double for attributes) 5. You may want to replace the String literals I have used with prefix/suffix variables created from bean:define tags. That was you can eliminate some of the quotes and it might look cleaner to you. 6. (this is the important one) I've never had to do this, but AFAIK this should work just fine. 7. Hey, let me know if this works. ;) peace, Joe -Original Message- From: Rea, Ron [mailto:[EMAIL PROTECTED]] Sent: Friday, September 27, 2002 12:29 PM To: 'Struts Users Mailing List' Subject: RE: Iterate tag question If you have a working example of how I could actually modify properties presented through an ArrayList, I would be forever grateful g to see that. I have no problem presenting an ArrayList of properties, but everything I have read indicates that you have to nead an edit button on each row in order to send changed data back to the Action class. Our users want a table of data presented back to them, where they can make changes to each row, then hit submit at the end and have the Action class update the data table with the edits. Unfortunately, I have not been able to do this using an ArrayList, and I think the link to Husted's site indicated the same, but maybe I'm wrong. If you have, I'd really like to know how you did it. Thanks! -Original Message- From: Joe Barefoot [mailto:[EMAIL PROTECTED]] Sent: Friday, September 27, 2002 12:15 PM To: Struts Users Mailing List Subject: RE: Iterate tag question -Original Message- From: Rea, Ron [mailto:[EMAIL PROTECTED]] Sent: Friday, September 27, 2002 12:05 PM To: 'Struts Users Mailing List' Subject: RE: Iterate tag question I originally had it as an arraylist of these properties, but using an ArrayList in the Iterate tag prevents me from being able to edit the First, how would using an ArrayList prevent you from doing any edits you could do with an array? Edit within the action, right? Second, in your snippet, you are using html:text, which expects a single Object, but your getter is returning a String[]. Not what you want to do. If you really want to use an array here, make it an array
Re: iterate tag question
This is wrong. You are only assignment ArrayList element thats refer to the same object instance `strMenu'. What you need to do is ArrayList alMenu = new ArrayList(); String strMenu[] = new String[2]; strMenu[0] = Tenant Information; strMenu[1] = /TenantInfo; alMenu.add(strMenu); strMenu[] = new String[2]; strMenu[0] = Tenant Information; strMenu[1] = /TenantInfo; alMenu.add(strMenu); But this is clumsy. Borrow the `LabelValueBean' from Struts Example or write an association class for you own project Then you can write __better__ Java code. ArrayList alMenu = new ArrayList( LabelValue labVal = new LabelValue( Tenant Information, /TenantInfo ); alMenu.add( labVal ); Or even more elegantly: ArrayList alMenu = new ArrayList( alMenu.add( new LabelValue( Tenant Information, /TenantInfo ) ); alMenu.add( new LabelValue( Service charge data, /Charges ) ); Benefit of this you put the collection is request or session scope. request.setAttribute( MY_COLLECTION_LIST, almenu ); You grab it with the html:options custom action like this ( assume the LabelValueBean has two method called getOptionName and getOptionValue ) bean:define id=privateDancer name=MY_COLLECTION_LIST / html:options collection=privateDancer property=optionValue labelProperty=optionName / Eh voila! -- Peter Pilgrim ++44 (0)207-545-9923 //_\\ Mathematics is essentially the study of islands of === disparate subjects in a sea of ignorance. || ! || Andrew Wiles _ Message History From: Frédéric Houbie - ABSIS-GROUP [EMAIL PROTECTED] on 08/11/2001 17:41 CET --CUT-- Hi, I need to use an arraylist in a iterate tag, i fill the arraylist with String arrays like that : ArrayList alMenu = new ArrayList(); String strMenu[] = new String[2]; strMenu[0] = Tenant Information; strMenu[1] = /TenantInfo; alMenu.add(strMenu); strMenu[0] = Tenancy Schedule; strMenu[1] = /TenantSched; alMenu.add(strMenu); strMenu[0] = Service charge data; strMenu[1] = /Charges; alMenu.add(strMenu); strMenu[0] = Stacking Plan; strMenu[1] = /StackingPlan; alMenu.add(strMenu); strMenu[0] = Tenants rental balance; strMenu[1] = /TenantRental; alMenu.add(strMenu); strMenu[0] = Break dates calendar; strMenu[1] = /BreakDates; alMenu.add(strMenu); session.setAttribute(Menu, alMenu); how can I access the item of String array in jsp bean tag. Do I have to write a class with getter and setter instead ? --CUT-- -- This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and destroy this e-mail. Any unauthorized copying, disclosure or distribution of the material in this e-mail is strictly forbidden. -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: Iterate Tag question, again -- Short ane sweet
On Sat, 24 Mar 2001, Sundar @eSaravana wrote: Hi, This is my situation: I have a collection(Vector) of buddyListForm as session attribute. So, in my JSP, logic:iterate id="buddylist" property="buddylist" scope="session" !-- vector being iterated -- If the Vector you are storing is under session key "buddyListForm", this should really say something like: logic:iterate id="buddy" name="buddylist" scope="session" Nope, the vector of buddyListForm is under the session key "buddylist". So just for clarity I modified my current code as following: logic:iterate id="buddy" property="buddylist" scope="session" !-- fetches the vector from session under key "buddylist -- logic:iterate id="buddy1" property="buddy" scope="session" !-- individual bean -- tr bean:write name= "buddy1" property="name" filter="true"/ /tr /logic:iterate /logic:iterate Still I am getting the same error javax.servlet.jsp.JspException: Cannot find bean buddy1 in scope null at org.apache.struts.util.RequestUtils.lookup(RequestUtils.java:219) at org.apache.struts.taglib.bean.WriteTag.doStartTag(WriteTag.java:179) at _0002fBuddyList_0002ejspBuddyList_jsp_48._jspService(_0002fBuddyList_0002ejs pBuddyList_jsp_48.java:681) And today I used 20010325 source release. !--Now, I have the individual bean, how do I iterate the properties-- logic:iterate id="buddy" name="buddylist" scope="session" tr bean:write name= "buddy" property="name" filter="true"/ /tr /logic:iterate /logic:iterate There was a bug several months ago where the "id" bean was not getting exposed correctly, but that has been fixed. How old is the version of Struts you are using? All I get for this code is: javax.servlet.jsp.JspException: Cannot find bean buddy in scope null at org.apache.struts.util.RequestUtils.lookup(RequestUtils.java:212) at org.apache.struts.taglib.bean.WriteTag.doStartTag(WriteTag.java: . I am attaching buddyListForm, too. Sundar Craig Sundar
Re: Iterate Tag question, again -- Short ane sweet
On Sun, 25 Mar 2001, Sundar @eSaravana wrote: On Sat, 24 Mar 2001, Sundar @eSaravana wrote: Hi, This is my situation: I have a collection(Vector) of buddyListForm as session attribute. So, in my JSP, logic:iterate id="buddylist" property="buddylist" scope="session" !-- vector being iterated -- If the Vector you are storing is under session key "buddyListForm", this should really say something like: logic:iterate id="buddy" name="buddylist" scope="session" Nope, the vector of buddyListForm is under the session key "buddylist". So just for clarity I modified my current code as following: logic:iterate id="buddy" property="buddylist" scope="session" !-- fetches the vector from session under key "buddylist -- logic:iterate id="buddy1" property="buddy" scope="session" !-- individual bean -- tr bean:write name= "buddy1" property="name" filter="true"/ /tr /logic:iterate /logic:iterate What I still don't understand is why are you using two nested iterate tags? You only need one tag to iterate over the contents of a Vector. If you have a session attribute named "buddylist" that is a Vector, iterate over it like this: table logic:iterate id="buddy" name="buddylist" scope="session" tr tdbean:write name="buddy" property="name" filter="true"//td /tr /logic:iterate /table Note that you refer to buddylist with a *name* attribute, not a *property* attribute. Craig
Re: Iterate Tag question, again -- Short ane sweet
Aside from the various errors, I think the answer to your original question is "you can't do that". Let me see if I understand what you want to do. You have a Vector whose elements are of some bean class (BuddyListForm I believe). You want to iterate over that Vector. Then, for each object, you want to iterate over its properties. So, for your BuddyListForm, the body of the iterator would be evaluated once for each of 'name', 'alias' and 'phoneno'. Is this right? The iterate tag does not support this. It operates on collections, iterators, maps, and arrays of objects. It does not support on-the-fly generation of such a collection using introspection on a bean, which is what would be needed for what you want to do. Hope this helps. -- Martin Cooper - Original Message - From: "Sundar @eSaravana" [EMAIL PROTECTED] To: "Jaganathan, Rupa" [EMAIL PROTECTED]; "Craig R. McClanahan" [EMAIL PROTECTED]; [EMAIL PROTECTED] Sent: Saturday, March 24, 2001 6:34 PM Subject: Re: Iterate Tag question, again -- Short ane sweet Hi, This is my situation: I have a collection(Vector) of buddyListForm as session attribute. So, in my JSP, logic:iterate id="buddylist" property="buddylist" scope="session" !-- vector being iterated -- !--Now, I have the individual bean, how do I iterate the properties-- logic:iterate id="buddy" name="buddylist" scope="session" tr bean:write name= "buddy" property="name" filter="true"/ /tr /logic:iterate /logic:iterate All I get for this code is: javax.servlet.jsp.JspException: Cannot find bean buddy in scope null at org.apache.struts.util.RequestUtils.lookup(RequestUtils.java:212) at org.apache.struts.taglib.bean.WriteTag.doStartTag(WriteTag.java: . I am attaching buddyListForm, too. Sundar - Original Message - From: "Craig R. McClanahan" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Sent: Friday, March 23, 2001 2:41 PM Subject: Re: Iterate Tag question, again -- Short ane sweet On Fri, 23 Mar 2001, Sundar @eSaravana wrote: Since nobody seemed to have read my long mail, I am re-writing my mail short and probably sweet. Can I do, multilevel iteration with iterate tag.? For example: I have collection of beans in my session. In my JSP, I want to first iterate at the collection to get the individual beans. And for every bean again iterate to get attributes/variables. There is no current mechanism to iterate over the properties of a bean (which is what I *think* you meant by attributes/variables). However, if your bean had a method that returned all the interesting stuff as a Map or something like that, you could certainly have a nested iteration over that. For example, consider a bean that has a getter method: public Map getProperties(); and you had a collection of them called "beans". Then you can: logic:iterate id="bean" name="beans" Now processing bean bean:write name="bean" property="id"/ logic:iterate id="property" name="bean" property="properties" Property bean:write name="property" property="key"/ has value bean:write name="property" property="value"/ /logic:iterate /logic:iterate Any help is deeply appreciated. Cheers...! Sundar Craig
RE: Iterate Tag question, again -- Short ane sweet
...maybe the problem is that you think you need two 'iterations'...you only have one collection so you only need one iteration, each bean's properties (attributes) can be obtained within the iteration (provided you have getter methods :-) ) logic:iterate id="theBean" name="theForm" property="theList" !-- for each object in iterator render its properties -- tr bean:write name="theBean" property="property1" filter="true"/br bean:write name="theBean" property="property2" filter="true"/br bean:write name="theBean" property="property3" filter="true"/br .etc.. /tr /table /logic:iterate maybe -Original Message- From: Sundar @eSaravana [mailto:[EMAIL PROTECTED]] Sent: Saturday, 24 March 2001 4:12 To: [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: Iterate Tag question, again -- Short ane sweet Since nobody seemed to have read my long mail, I am re-writing my mail short and probably sweet. Can I do, multilevel iteration with iterate tag.? For example: I have collection of beans in my session. In my JSP, I want to first iterate at the collection to get the individual beans. And for every bean again iterate to get attributes/variables. Any help is deeply appreciated. Cheers...! Sundar
Re: Iterate Tag question, again -- Short ane sweet
Hi, This is my situation: I have a collection(Vector) of buddyListForm as session attribute. So, in my JSP, logic:iterate id="buddylist" property="buddylist" scope="session" !-- vector being iterated -- !--Now, I have the individual bean, how do I iterate the properties-- logic:iterate id="buddy" name="buddylist" scope="session" tr bean:write name= "buddy" property="name" filter="true"/ /tr /logic:iterate /logic:iterate All I get for this code is: javax.servlet.jsp.JspException: Cannot find bean buddy in scope null at org.apache.struts.util.RequestUtils.lookup(RequestUtils.java:212) at org.apache.struts.taglib.bean.WriteTag.doStartTag(WriteTag.java: . I am attaching buddyListForm, too. Sundar - Original Message - From: "Craig R. McClanahan" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Sent: Friday, March 23, 2001 2:41 PM Subject: Re: Iterate Tag question, again -- Short ane sweet On Fri, 23 Mar 2001, Sundar @eSaravana wrote: Since nobody seemed to have read my long mail, I am re-writing my mail short and probably sweet. Can I do, multilevel iteration with iterate tag.? For example: I have collection of beans in my session. In my JSP, I want to first iterate at the collection to get the individual beans. And for every bean again iterate to get attributes/variables. There is no current mechanism to iterate over the properties of a bean (which is what I *think* you meant by attributes/variables). However, if your bean had a method that returned all the interesting stuff as a Map or something like that, you could certainly have a nested iteration over that. For example, consider a bean that has a getter method: public Map getProperties(); and you had a collection of them called "beans". Then you can: logic:iterate id="bean" name="beans" Now processing bean bean:write name="bean" property="id"/ logic:iterate id="property" name="bean" property="properties" Property bean:write name="property" property="key"/ has value bean:write name="property" property="value"/ /logic:iterate /logic:iterate Any help is deeply appreciated. Cheers...! Sundar Craig BuddyListForm.java
Re: Iterate Tag question, again -- Short ane sweet
How about using the tag bean:define id="secondCollection" name="elementFromFirstColleciton" property="someCollecitonProperty" scope="session"/ to get a handle on the second collection and then literate on "secondCollection" At 11:12 AM 3/23/2001 -0700, you wrote: Since nobody seemed to have read my long mail, I am re-writing my mail short and probably sweet. Can I do, multilevel iteration with iterate tag.? For example: I have collection of beans in my session. In my JSP, I want to first iterate at the collection to get the individual beans. And for every bean again iterate to get attributes/variables. Any help is deeply appreciated. Cheers...! Sundar
RE: Iterate Tag question, again -- Short ane sweet
I have employed multilevel iteration to display rows from a database, where I iterate through the rows first and for each row iterate through the columns to display the table. It should be possible in your case too. -Original Message- From: Sundar @eSaravana [mailto:[EMAIL PROTECTED]] Sent: Friday, March 23, 2001 1:12 PM To: [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: Iterate Tag question, again -- Short ane sweet Since nobody seemed to have read my long mail, I am re-writing my mail short and probably sweet. Can I do, multilevel iteration with iterate tag.? For example: I have collection of beans in my session. In my JSP, I want to first iterate at the collection to get the individual beans. And for every bean again iterate to get attributes/variables. Any help is deeply appreciated. Cheers...! Sundar
