Problems with rich:orderedList

[kash_meu]

Hello,

I am getting this exception error.

sourceId=category_order_form:videosOrderingList[severity=(ERROR 2), summary=("Component category_order_form:videosOrderingList has invalid value expression eu.digitania.admingui.beans.Category@ca9a2d"), detail=("Component category_order_form:videosOrderingList has invalid value expression eu.digitania.admingui.beans.Category@ca9a2d")]

This is how I am coding it

<rich:orderingList id="videosOrderingList"
 value="#{categoryBean.videoCategories}" var="category" converter="categoryConverter" selection="#{categoryBean.selectedVideoCategories}">
 <rich:column>
 <h:outputText value="#{category.name}"></h:outputText>
 </rich:column>
</rich:orderingList>

where categoryBean.videoCategories is mapped to a List

This is my converter

public class CategoryConverter implements Converter
{

 @Override
 public Object getAsObject(FacesContext context, UIComponent component, String name)
 {
 Category category = new Category();
 category.setName(name);
 return category;
 }

 @Override
 public String getAsString(FacesContext context, UIComponent component, Object object)
 {
 Category category = (Category) object;
 return category.getName();
 }

}

What might be the problem.

[nbelaevski]

Are equals and hashCode properly defined for Category class?

[kash_meu]

No, what logic can I used for these two overloads. Any example?

[ilya_shaikovsky]

richfaces-demo contains the code. checkout sources from svn to explore the case locally.

[kash_meu]

correction Overrides

[kash_meu]

I overrode the two functions like this.

public boolean equals(Object object)
 {
 if (object instanceof Category)
 {
 Category category = (Category) object;
 try
 {
 if (this.categoryId.equals(category.getCategoryId()))
 {
 return true;
 }
 }
 catch (NullPointerException e)
 {
 e.printStackTrace();
 }
 }
 return false;
 }

 public int hashCode()
 {
 if(this.getCategoryId()!=null)
 {
 return this.getCategoryId().hashCode();
 }
 return (int)(Math.random()+1*10000);
 }

but the problem is still there.

[nbelaevski]

Eclipse has equals/hashCode generation feature out of the box. Check if your IDE is equipped with one.

[nbelaevski]

http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#equals(java.lang.Object)
http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#hashCode()

[kash_meu]

This time I generated the overrides using eclipse.

These are the functions

@Override
 public int hashCode()
 {
 final int prime = 31;
 int result = 1;
 result = prime * result + ((categoryId == null) ? 0 : categoryId.hashCode());
 result = prime * result + ((contenttypeId == null) ? 0 : contenttypeId.hashCode());
 result = prime * result + ((name == null) ? 0 : name.hashCode());
 result = prime * result + ((sequenceNumber == null) ? 0 : sequenceNumber.hashCode());
 return result;
 }

 @Override
 public boolean equals(Object obj)
 {
 if (this == obj)
 return true;
 if (obj == null)
 return false;
 if (getClass() != obj.getClass())
 return false;
 Category other = (Category) obj;
 if (categoryId == null)
 {
 if (other.categoryId != null)
 return false;
 }
 else if (!categoryId.equals(other.categoryId))
 return false;
 if (contenttypeId == null)
 {
 if (other.contenttypeId != null)
 return false;
 }
 else if (!contenttypeId.equals(other.contenttypeId))
 return false;
 if (name == null)
 {
 if (other.name != null)
 return false;
 }
 else if (!name.equals(other.name))
 return false;
 if (sequenceNumber == null)
 {
 if (other.sequenceNumber != null)
 return false;
 }
 else if (!sequenceNumber.equals(other.sequenceNumber))
 return false;
 return true;
 }

But I still face this message
sourceId=category_order_form:videosOrderingList[severity=(ERROR 2), summary=("Component category_order_form:videosOrderingList has invalid value expression eu.digitania.admingui.beans.Category@3779bec0"), detail=("Component category_order_form:videosOrderingList has invalid value expression eu.digitania.admingui.beans.Category@3779bec0")]

[nbelaevski]

Ok, post code for categoryBean please.

[kash_meu]

package eu.digitania.admingui.backingbeans;

import java.io.Serializable;
import java.sql.SQLException;
import java.util.List;

import eu.digitania.admingui.beans.Category;
import eu.digitania.admingui.dao.CategoryDAOImpl;
import eu.digitania.admingui.dao.MobileContentPortalDao;
import eu.digitania.admingui.domain.Constants;

public class CategoryBackingBean extends Category implements Serializable
{
/**
*
*/
private static final long serialVersionUID = 205990671346396379L;


private List gamesCategories;
private List trueTonesCategories;
private List polyTonesCategories;
private List videoCategories;
private List backgroundCategories;

private List selectedGamesCategories;
private List selectedTrueTonesCategories;
private List selectedPolyTonesCategories;
private List selectedVideoCategories;
private List selectedBackgroundCategories;



public void setVideoCategories(List videoCategories)
{
this.videoCategories = videoCategories;
}


public void setBackgroundCategories(List backgroundCategories)
{
this.backgroundCategories = backgroundCategories;
}

public void setGamesCategories(List gamesCategories)
{
this.gamesCategories = gamesCategories;
}

public void setTrueTonesCategories(List trueTonesCategories)
{
this.trueTonesCategories = trueTonesCategories;
}

public void setPolyTonesCategories(List polyTonesCategories)
{
this.polyTonesCategories = polyTonesCategories;
}


public List getGamesCategories()
{
CategoryDAOImpl categoryDAOImpl = new CategoryDAOImpl(MobileContentPortalDao.getSqlMapper());
try
{
gamesCategories = categoryDAOImpl.selectNonAdultCategoriesOrderedBySequenceNumber(Constants.MOBILE_GAME_CONTENT_TYPE);
}
catch (SQLException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
return gamesCategories;
}

public List getTrueTonesCategories()
{
CategoryDAOImpl categoryDAOImpl = new CategoryDAOImpl(MobileContentPortalDao.getSqlMapper());
try
{
trueTonesCategories = categoryDAOImpl.selectNonAdultCategoriesOrderedBySequenceNumber(Constants.TRUE_TONE_CONTENT_TYPE);
}
catch (SQLException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
return trueTonesCategories;
}

public List getPolyTonesCategories()
{
CategoryDAOImpl categoryDAOImpl = new CategoryDAOImpl(MobileContentPortalDao.getSqlMapper());
try
{
polyTonesCategories = categoryDAOImpl.selectNonAdultCategoriesOrderedBySequenceNumber(Constants.POLY_RINGTONE_CONTENT_TYPE);
}
catch (SQLException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
return polyTonesCategories;
}

public List getVideoCategories()
{
CategoryDAOImpl categoryDAOImpl = new CategoryDAOImpl(MobileContentPortalDao.getSqlMapper());
try
{
videoCategories = categoryDAOImpl.selectNonAdultCategoriesOrderedBySequenceNumber(Constants.VIDEO_CONTENT_TYPE);
}
catch (SQLException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
return videoCategories;
}

public List getBackgroundCategories()
{
CategoryDAOImpl categoryDAOImpl = new CategoryDAOImpl(MobileContentPortalDao.getSqlMapper());
try
{
backgroundCategories = categoryDAOImpl.selectNonAdultCategoriesOrderedBySequenceNumber(Constants.BACKGROUND_CONTENT_TYPE);
}
catch (SQLException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
return backgroundCategories;
}


public List getSelectedGamesCategories()
{
return selectedGamesCategories;
}


public void setSelectedGamesCategories(List selectedGamesCategories)
{
this.selectedGamesCategories = selectedGamesCategories;
}


public List getSelectedTrueTonesCategories()
{
return selectedTrueTonesCategories;
}


public void setSelectedTrueTonesCategories(List selectedTrueTonesCategories)
{
this.selectedTrueTonesCategories = selectedTrueTonesCategories;
}


public List getSelectedPolyTonesCategories()
{
return selectedPolyTonesCategories;
}


public void setSelectedPolyTonesCategories(List selectedPolyTonesCategories)
{
this.selectedPolyTonesCategories = selectedPolyTonesCategories;
}


public List getSelectedVideoCategories()
{
return selectedVideoCategories;
}


public void setSelectedVideoCategories(List selectedVideoCategories)
{
this.selectedVideoCategories = selectedVideoCategories;
}


public List getSelectedBackgroundCategories()
{
return selectedBackgroundCategories;
}


public void setSelectedBackgroundCategories(List selectedBackgroundCategories)
{
this.selectedBackgroundCategories = selectedBackgroundCategories;
}


public String saveOrdering()
{


return "success";
}




}



package eu.digitania.admingui.beans;

public class Category
{
/**
* This field was generated by Apache iBATIS ibator. This field corresponds to the database column category.category_id
*
* @ibatorgenerated Fri Jun 05 10:55:52 BDT 2009
*/
private Integer categoryId;

/**
* This field was generated by Apache iBATIS ibator. This field corresponds to the database column category.contenttype_id
*
* @ibatorgenerated Fri Jun 05 10:55:52 BDT 2009
*/
private Integer contenttypeId;

/**
* This field was generated by Apache iBATIS ibator. This field corresponds to the database column category.name
*
* @ibatorgenerated Fri Jun 05 10:55:52 BDT 2009
*/
private String name;

/**
* This field was generated by Apache iBATIS ibator. This field corresponds to the database column category.sequence_number
*
* @ibatorgenerated Fri Jun 05 10:55:52 BDT 2009
*/
private Integer sequenceNumber;

/**
* This method was generated by Apache iBATIS ibator. This method returns the value of the database column category.category_id
*
* @return the value of category.category_id
*
* @ibatorgenerated Fri Jun 05 10:55:52 BDT 2009
*/
public Integer getCategoryId()
{
return categoryId;
}

/**
* This method was generated by Apache iBATIS ibator. This method sets the value of the database column category.category_id
*
* @param categoryId
* the value for category.category_id
*
* @ibatorgenerated Fri Jun 05 10:55:52 BDT 2009
*/
public void setCategoryId(Integer categoryId)
{
this.categoryId = categoryId;
}

/**
* This method was generated by Apache iBATIS ibator. This method returns the value of the database column category.contenttype_id
*
* @return the value of category.contenttype_id
*
* @ibatorgenerated Fri Jun 05 10:55:52 BDT 2009
*/
public Integer getContenttypeId()
{
return contenttypeId;
}

/**
* This method was generated by Apache iBATIS ibator. This method sets the value of the database column category.contenttype_id
*
* @param contenttypeId
* the value for category.contenttype_id
*
* @ibatorgenerated Fri Jun 05 10:55:52 BDT 2009
*/
public void setContenttypeId(Integer contenttypeId)
{
this.contenttypeId = contenttypeId;
}

/**
* This method was generated by Apache iBATIS ibator. This method returns the value of the database column category.name
*
* @return the value of category.name
*
* @ibatorgenerated Fri Jun 05 10:55:52 BDT 2009
*/
public String getName()
{
return name;
}

/**
* This method was generated by Apache iBATIS ibator. This method sets the value of the database column category.name
*
* @param name
* the value for category.name
*
* @ibatorgenerated Fri Jun 05 10:55:52 BDT 2009
*/
public void setName(String name)
{
this.name = name;
}

/**
* This method was generated by Apache iBATIS ibator. This method returns the value of the database column category.sequence_number
*
* @return the value of category.sequence_number
*
* @ibatorgenerated Fri Jun 05 10:55:52 BDT 2009
*/
public Integer getSequenceNumber()
{
return sequenceNumber;
}

/**
* This method was generated by Apache iBATIS ibator. This method sets the value of the database column category.sequence_number
*
* @param sequenceNumber
* the value for category.sequence_number
*
* @ibatorgenerated Fri Jun 05 10:55:52 BDT 2009
*/
public void setSequenceNumber(Integer sequenceNumber)
{
this.sequenceNumber = sequenceNumber;
}

@Override
public int hashCode()
{
final int prime = 31;
int result = 1;
result = prime * result + ((categoryId == null) ? 0 : categoryId.hashCode());
result = prime * result + ((contenttypeId == null) ? 0 : contenttypeId.hashCode());
result = prime * result + ((name == null) ? 0 : name.hashCode());
result = prime * result + ((sequenceNumber == null) ? 0 : sequenceNumber.hashCode());
return result;
}

@Override
public boolean equals(Object obj)
{
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Category other = (Category) obj;
if (categoryId == null)
{
if (other.categoryId != null)
return false;
}
else if (!categoryId.equals(other.categoryId))
return false;
if (contenttypeId == null)
{
if (other.contenttypeId != null)
return false;
}
else if (!contenttypeId.equals(other.contenttypeId))
return false;
if (name == null)
{
if (other.name != null)
return false;
}
else if (!name.equals(other.name))
return false;
if (sequenceNumber == null)
{
if (other.sequenceNumber != null)
return false;
}
else if (!sequenceNumber.equals(other.sequenceNumber))
return false;
return true;
}


}

[kash_meu]

package eu.digitania.admingui.backingbeans;

import java.io.Serializable;
import java.sql.SQLException;
import java.util.List;

import eu.digitania.admingui.beans.Category;
import eu.digitania.admingui.dao.CategoryDAOImpl;
import eu.digitania.admingui.dao.MobileContentPortalDao;
import eu.digitania.admingui.domain.Constants;

public class CategoryBackingBean extends Category implements Serializable
{
/**
*
*/
private static final long serialVersionUID = 205990671346396379L;


private List gamesCategories;
private List trueTonesCategories;
private List polyTonesCategories;
private List videoCategories;
private List backgroundCategories;

private List selectedGamesCategories;
private List selectedTrueTonesCategories;
private List selectedPolyTonesCategories;
private List selectedVideoCategories;
private List selectedBackgroundCategories;



public void setVideoCategories(List videoCategories)
{
this.videoCategories = videoCategories;
}


public void setBackgroundCategories(List backgroundCategories)
{
this.backgroundCategories = backgroundCategories;
}

public void setGamesCategories(List gamesCategories)
{
this.gamesCategories = gamesCategories;
}

public void setTrueTonesCategories(List trueTonesCategories)
{
this.trueTonesCategories = trueTonesCategories;
}

public void setPolyTonesCategories(List polyTonesCategories)
{
this.polyTonesCategories = polyTonesCategories;
}


public List getGamesCategories()
{
CategoryDAOImpl categoryDAOImpl = new CategoryDAOImpl(MobileContentPortalDao.getSqlMapper());
try
{
gamesCategories = categoryDAOImpl.selectNonAdultCategoriesOrderedBySequenceNumber(Constants.MOBILE_GAME_CONTENT_TYPE);
}
catch (SQLException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
return gamesCategories;
}

public List getTrueTonesCategories()
{
CategoryDAOImpl categoryDAOImpl = new CategoryDAOImpl(MobileContentPortalDao.getSqlMapper());
try
{
trueTonesCategories = categoryDAOImpl.selectNonAdultCategoriesOrderedBySequenceNumber(Constants.TRUE_TONE_CONTENT_TYPE);
}
catch (SQLException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
return trueTonesCategories;
}

public List getPolyTonesCategories()
{
CategoryDAOImpl categoryDAOImpl = new CategoryDAOImpl(MobileContentPortalDao.getSqlMapper());
try
{
polyTonesCategories = categoryDAOImpl.selectNonAdultCategoriesOrderedBySequenceNumber(Constants.POLY_RINGTONE_CONTENT_TYPE);
}
catch (SQLException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
return polyTonesCategories;
}

public List getVideoCategories()
{
CategoryDAOImpl categoryDAOImpl = new CategoryDAOImpl(MobileContentPortalDao.getSqlMapper());
try
{
videoCategories = categoryDAOImpl.selectNonAdultCategoriesOrderedBySequenceNumber(Constants.VIDEO_CONTENT_TYPE);
}
catch (SQLException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
return videoCategories;
}

public List getBackgroundCategories()
{
CategoryDAOImpl categoryDAOImpl = new CategoryDAOImpl(MobileContentPortalDao.getSqlMapper());
try
{
backgroundCategories = categoryDAOImpl.selectNonAdultCategoriesOrderedBySequenceNumber(Constants.BACKGROUND_CONTENT_TYPE);
}
catch (SQLException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
return backgroundCategories;
}


public List getSelectedGamesCategories()
{
return selectedGamesCategories;
}


public void setSelectedGamesCategories(List selectedGamesCategories)
{
this.selectedGamesCategories = selectedGamesCategories;
}


public List getSelectedTrueTonesCategories()
{
return selectedTrueTonesCategories;
}


public void setSelectedTrueTonesCategories(List selectedTrueTonesCategories)
{
this.selectedTrueTonesCategories = selectedTrueTonesCategories;
}


public List getSelectedPolyTonesCategories()
{
return selectedPolyTonesCategories;
}


public void setSelectedPolyTonesCategories(List selectedPolyTonesCategories)
{
this.selectedPolyTonesCategories = selectedPolyTonesCategories;
}


public List getSelectedVideoCategories()
{
return selectedVideoCategories;
}


public void setSelectedVideoCategories(List selectedVideoCategories)
{
this.selectedVideoCategories = selectedVideoCategories;
}


public List getSelectedBackgroundCategories()
{
return selectedBackgroundCategories;
}


public void setSelectedBackgroundCategories(List selectedBackgroundCategories)
{
this.selectedBackgroundCategories = selectedBackgroundCategories;
}


public String saveOrdering()
{


return "success";
}




}



package eu.digitania.admingui.beans;

public class Category
{
/**
* This field was generated by Apache iBATIS ibator. This field corresponds to the database column category.category_id
*
* @ibatorgenerated Fri Jun 05 10:55:52 BDT 2009
*/
private Integer categoryId;

/**
* This field was generated by Apache iBATIS ibator. This field corresponds to the database column category.contenttype_id
*
* @ibatorgenerated Fri Jun 05 10:55:52 BDT 2009
*/
private Integer contenttypeId;

/**
* This field was generated by Apache iBATIS ibator. This field corresponds to the database column category.name
*
* @ibatorgenerated Fri Jun 05 10:55:52 BDT 2009
*/
private String name;

/**
* This field was generated by Apache iBATIS ibator. This field corresponds to the database column category.sequence_number
*
* @ibatorgenerated Fri Jun 05 10:55:52 BDT 2009
*/
private Integer sequenceNumber;

/**
* This method was generated by Apache iBATIS ibator. This method returns the value of the database column category.category_id
*
* @return the value of category.category_id
*
* @ibatorgenerated Fri Jun 05 10:55:52 BDT 2009
*/
public Integer getCategoryId()
{
return categoryId;
}

/**
* This method was generated by Apache iBATIS ibator. This method sets the value of the database column category.category_id
*
* @param categoryId
* the value for category.category_id
*
* @ibatorgenerated Fri Jun 05 10:55:52 BDT 2009
*/
public void setCategoryId(Integer categoryId)
{
this.categoryId = categoryId;
}

/**
* This method was generated by Apache iBATIS ibator. This method returns the value of the database column category.contenttype_id
*
* @return the value of category.contenttype_id
*
* @ibatorgenerated Fri Jun 05 10:55:52 BDT 2009
*/
public Integer getContenttypeId()
{
return contenttypeId;
}

/**
* This method was generated by Apache iBATIS ibator. This method sets the value of the database column category.contenttype_id
*
* @param contenttypeId
* the value for category.contenttype_id
*
* @ibatorgenerated Fri Jun 05 10:55:52 BDT 2009
*/
public void setContenttypeId(Integer contenttypeId)
{
this.contenttypeId = contenttypeId;
}

/**
* This method was generated by Apache iBATIS ibator. This method returns the value of the database column category.name
*
* @return the value of category.name
*
* @ibatorgenerated Fri Jun 05 10:55:52 BDT 2009
*/
public String getName()
{
return name;
}

/**
* This method was generated by Apache iBATIS ibator. This method sets the value of the database column category.name
*
* @param name
* the value for category.name
*
* @ibatorgenerated Fri Jun 05 10:55:52 BDT 2009
*/
public void setName(String name)
{
this.name = name;
}

/**
* This method was generated by Apache iBATIS ibator. This method returns the value of the database column category.sequence_number
*
* @return the value of category.sequence_number
*
* @ibatorgenerated Fri Jun 05 10:55:52 BDT 2009
*/
public Integer getSequenceNumber()
{
return sequenceNumber;
}

/**
* This method was generated by Apache iBATIS ibator. This method sets the value of the database column category.sequence_number
*
* @param sequenceNumber
* the value for category.sequence_number
*
* @ibatorgenerated Fri Jun 05 10:55:52 BDT 2009
*/
public void setSequenceNumber(Integer sequenceNumber)
{
this.sequenceNumber = sequenceNumber;
}

@Override
public int hashCode()
{
final int prime = 31;
int result = 1;
result = prime * result + ((categoryId == null) ? 0 : categoryId.hashCode());
result = prime * result + ((contenttypeId == null) ? 0 : contenttypeId.hashCode());
result = prime * result + ((name == null) ? 0 : name.hashCode());
result = prime * result + ((sequenceNumber == null) ? 0 : sequenceNumber.hashCode());
return result;
}

@Override
public boolean equals(Object obj)
{
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Category other = (Category) obj;
if (categoryId == null)
{
if (other.categoryId != null)
return false;
}
else if (!categoryId.equals(other.categoryId))
return false;
if (contenttypeId == null)
{
if (other.contenttypeId != null)
return false;
}
else if (!contenttypeId.equals(other.contenttypeId))
return false;
if (name == null)
{
if (other.name != null)
return false;
}
else if (!name.equals(other.name))
return false;
if (sequenceNumber == null)
{
if (other.sequenceNumber != null)
return false;
}
else if (!sequenceNumber.equals(other.sequenceNumber))
return false;
return true;
}


}

[nbelaevski]

This may also happen if data changes between requests. Make sure that DAO satisfies this requirement. What is bean scope?

[kash_meu]

i am sorry. I posted it two times

[kash_meu]

bean scope is request. The DAO will always return the same results