Re: Problem assiging elements in to list
--- Cesar Arevalo <[EMAIL PROTECTED]> wrote: > when you say "All of this is done automatically by the framework" > do you mean if you populate from a form? Actually, let me re-answer that: yes, with caveats. For example, in the source provided the list isn't genericized, so without a type conversion properties file I don't think it would work. It can also depend on what type conversion(s) are being attempted; simple property types are supported out-of-the-box. Sometimes custom type converters would have to be written. Without knowing what the original poster was trying to do it's hard to say what problem s/he is experiencing. Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Problem assiging elements in to list
--- Cesar Arevalo <[EMAIL PROTECTED]> wrote: > when you say "All of this is done automatically by the framework" > do you mean if you populate from a form? Yes. Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Problem assiging elements in to list
Just out of curiosity, when you say "All of this is done automatically by the
framework" do you mean if you populate from a form? or how do you mean the
framework does this automatically?
Cesar
- Original Message
From: Dave Newton <[EMAIL PROTECTED]>
To: Struts Users Mailing List
Sent: Friday, March 14, 2008 10:27:19 AM
Subject: Re: Problem assiging elements in to list
--- Cesar Arevalo <[EMAIL PROTECTED]> wrote:
> by the time you get to the for loop I don't see the list initialized,
> unless you are doing this from your jsp I don't think it will work as how
> you have it, a better way would be with a normal for like this :
>
> for (int index = 0; index < someLimit; index++) {
>Person person = new Person();
>persons.add(index, person);
> _logger.error("Person ::" +
> person);
>
> e.persist(person);
> }
>
> hope this helps.
That would create a list of empty Person instances (then persist the last
empty Person, but I'm assuming that's a typo).
All of this is done automatically by the framework.
> From: Vamsi Gmail! <[EMAIL PROTECTED]>
>
> I have a requirement where I need to assign a Objects to a list.
> I tried the example given in showcase there is working (in the site).
> But It is not assigning to that list
>
> I am also attaching code for your reference.
>
> [code]
You never really state how you're expecting the list to be filled: is this
from a form with multiple Person form fields, or...?
Dave
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Re: Problem assiging elements in to list
--- Cesar Arevalo <[EMAIL PROTECTED]> wrote:
> by the time you get to the for loop I don't see the list initialized,
> unless you are doing this from your jsp I don't think it will work as how
> you have it, a better way would be with a normal for like this :
>
> for (int index = 0; index < someLimit; index++) {
>Person person = new Person();
>persons.add(index, person);
> _logger.error("Person ::" +
> person);
>
> e.persist(person);
> }
>
> hope this helps.
That would create a list of empty Person instances (then persist the last
empty Person, but I'm assuming that's a typo).
All of this is done automatically by the framework.
> From: Vamsi Gmail! <[EMAIL PROTECTED]>
>
> I have a requirement where I need to assign a Objects to a list.
> I tried the example given in showcase there is working (in the site).
> But It is not assigning to that list
>
> I am also attaching code for your reference.
>
> [code]
You never really state how you're expecting the list to be filled: is this
from a form with multiple Person form fields, or...?
Dave
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Re: Problem assiging elements in to list
HI Vamsi,
by the time you get to the for loop I don't see the list initialized, unless
you are doing this from your jsp I don't think it will work as how you have it,
a better way would be with a normal for like this :
for (int index = 0; index < someLimit; index++) {
Person person = new Person();
persons.add(index, person);
_logger.error("Person ::" + person);
e.persist(person);
}
hope this helps.
Cesar
- Original Message
From: Vamsi Gmail! <[EMAIL PROTECTED]>
To: Struts Users Mailing List
Sent: Thursday, March 13, 2008 11:14:53 PM
Subject: Problem assiging elements in to list
Hi all,
I have a requirement where I need to assign a Objects to a list.
I tried the example given in showcase there is working (in the site).
But It is not assigning to that list
I am also attaching code for your refernce.
---Vamsi
-Inline Attachment Follows-
/*
* $Id: PersonAction.java 471756 2006-11-06 15:01:43Z husted $
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package test.actions;
import java.util.ArrayList;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.EntityTransaction;
import javax.persistence.PersistenceUnit;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.exception.ConstraintViolationException;
import test.examples.Person;
import com.opensymphony.xwork2.ActionSupport;
@SuppressWarnings("serial")
public class PersonAction extends ActionSupport {
//private Person person;
private List persons = new ArrayList();
private Log _logger = LogFactory.getLog(PersonAction.class);
public List getPersons() {
return persons;
}
public void setPersons(List persons) {
this.persons = persons;
}
@SuppressWarnings("unchecked")
public String save() {
EntityManager e = SfmsEntityManagerFactory.getEntityManager();
EntityTransaction txn =e.getTransaction();
txn.begin();
try{
_logger.error("Person ::");
_logger.error("Person ::");
for (Object object :persons) {
Person person = (Person) object;
_logger.error("Person ::" + person);
e.persist(person);
}
_logger.error("Person ::");
_logger.error("Person ::");
txn.commit();
addActionMessage("Record Added");
read(e);
}catch(ConstraintViolationException e1) {
addActionError("Record Already There");
}catch(IllegalStateException e1){
}catch(Exception e1) {
addActionError("Error Inserting");
txn.rollback();
}
return SUCCESS;
}
private void read(EntityManager e) {
persons = e.createQuery("From Person").getResultList();
}
}
-Inline Attachment Follows-
package test.examples;
import static javax.persistence.FetchType.LAZY;
import javax.persistence.Basic;
import javax.persistence.Entity;
import javax.persistence.Id;
@Entity
public class Person implements Persister{
@Id
private String name;
@Basic(fetch=LAZY)
private int age;
public String getName() {
return name;
}
public int getAge() {
return age;
}
public void setName(String name) {
this.name = name;
}
public void setAge(int age) {
this.age = age;
}
@Override
public String toString() {
return name + "" + age;
}
}
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Problem assiging elements in to list
Hi all,
I have a requirement where I need to assign a Objects to a list.
I tried the example given in showcase there is working (in the site).
But It is not assigning to that list
I am also attaching code for your refernce.
---Vamsi
/*
* $Id: PersonAction.java 471756 2006-11-06 15:01:43Z husted $
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package test.actions;
import java.util.ArrayList;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.EntityTransaction;
import javax.persistence.PersistenceUnit;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.exception.ConstraintViolationException;
import test.examples.Person;
import com.opensymphony.xwork2.ActionSupport;
@SuppressWarnings("serial")
public class PersonAction extends ActionSupport {
//private Person person;
private List persons = new ArrayList();
private Log _logger = LogFactory.getLog(PersonAction.class);
public List getPersons() {
return persons;
}
public void setPersons(List persons) {
this.persons = persons;
}
@SuppressWarnings("unchecked")
public String save() {
EntityManager e = SfmsEntityManagerFactory.getEntityManager();
EntityTransaction txn =e.getTransaction();
txn.begin();
try{
_logger.error("Person ::");
_logger.error("Person ::");
for (Object object :persons) {
Person person = (Person) object;
_logger.error("Person
::" + person);
e.persist(person);
}
_logger.error("Person ::");
_logger.error("Person ::");
txn.commit();
addActionMessage("Record Added");
read(e);
}catch(ConstraintViolationException e1) {
addActionError("Record Already There");
}catch(IllegalStateException e1){
}catch(Exception e1) {
addActionError("Error Inserting");
txn.rollback();
}
return SUCCESS;
}
private void read(EntityManager e) {
persons = e.createQuery("From Person").getResultList();
}
}package test.examples;
import static javax.persistence.FetchType.LAZY;
import javax.persistence.Basic;
import javax.persistence.Entity;
import javax.persistence.Id;
@Entity
public class Person implements Persister{
@Id
private String name;
@Basic(fetch=LAZY)
private int age;
public String getName() {
return name;
}
public int getAge() {
return age;
}
public void setName(String name) {
this.name = name;
}
public void setAge(int age) {
this.age = age;
}
@Override
public String toString() {
return name + "" + age;
}
}
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