Bonjour à Tous et à Toutes,J'utilise actuellement...

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Member II

Re: Bonjour à Tous et à Toutes,J'utilise actuellement...

Svp excusez moi pour ne pas parler Francais.

Dear French Alfresco users,

I run into the same error message as the one above:

Constraint type 'org.contezza.customConstraints.ListOfValuesQueryConstraint' on constraint 'test:CodeLabel' is not a well-known type or a valid Constraint implementation

This is the only place on the internet on which this error is discussed. I also would like a custom constraint like you are making here.

I was able to get the java code compiled with javac against the Alfresco SDK. The result was a compiled .class file. I was not sure where to put it, so i put it in a new "classes" directory in my extensions root.

Next i created a test model, again based on the example i found, and i set the "type" parameter to my package name in the java code, extended with the name of the public class in the java code. In my case "org.contezza.customConstraints.ListOfValuesQueryConstraint".

Of course it did something wrong. When i try to deploy the model (it's a dynamic model in the data dictionary/models folder) i get the error message in the logging "Constraint type 'org.contezza.customConstraints.ListOfValuesQueryConstraint' on constraint 'test:CodeLabel' is not a well-known type or a valid Constraint implementation".

Because i was able to compile the java code against the SDK without error, i think this error has to do with the place i put the class file in. Can anyone give me a push into the right direction?

My environment is:
- Ubuntu 7.04
- Tomcat 5.5
- JDK 1.5
- MySQL 5

My (example) java code is as follows:

package org.contezza.customConstraints;

import java.util.ArrayList;
import java.util.List;
import java.sql.*;
//import org.alfresco.i18n.I18NUtil;
import org.alfresco.repo.dictionary.constraint.ListOfValuesConstraint;
import org.alfresco.web.bean.generator.BaseComponentGenerator;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import javax.faces.model.SelectItem;

public class ListOfValuesQueryConstraint extends ListOfValuesConstraint implements Serializable {

   private static Log logger = LogFactory.getLog(BaseComponentGenerator.class);

   private static final long serialVersionUID=1;

   private List<String> allowedLabels;

   public void setAllowedValues(List allowedValues) {}
   public void setCaseSensitive(boolean caseSensitive) {}

   public void initialize() {

   public List<String> getAllowedLabels() {
      return this.allowedLabels;

   public void setAllowedLabels(List<String> allowedLabels) {

    public List<SelectItem> getSelectItemList() {
      List<SelectItem> result = new ArrayList<SelectItem>(this.getAllowedValues().size());
      for(int i=0;i<this.getAllowedValues().size();i++) {
         result.add(new SelectItem((Object)this.getAllowedValues().get(i),this.allowedLabels.get(i)));
      return result;

    protected void loadDB() {

       String driverName = "";
        String serverName = "localhost";
        String mydatabase = "alfresco";
        String username = "alfresco";
        String password = "alfresco";

        List<String> av = new ArrayList<String>();
        List<String> al=new ArrayList<String>();

        try {
           Connection connection = null;
            String url = "jdbc:mysql://" + serverName +  "/" + mydatabase;
            connection = DriverManager.getConnection(url, username, password);
            Statement stmt = connection.createStatement();
            ResultSet rs = stmt.executeQuery("select code,label from codelabel");
            while ( {
        catch (Exception e) {}


My example model is as follows:

<?xml version="1.0" encoding="UTF-8"?>

<model name="test:test" xmlns="">
   <author>Contezza InformatieManagement</author>
      <import uri="" prefix="d" />
      <import uri="" prefix="cm" />
      <namespace uri="" prefix="test" />

   <constraint name="test:CodeLabel" type="org.contezza.customConstraints.ListOfValuesQueryConstraint">
      <parameter name="allowedValues">
   <parameter name="caseSensitive"><value>true</value></parameter>
      <type name="test:codecontent">
         <title>Contenu étendu</title>
            <property name="test:codestr">
               <title>Code str</title>
                  <constraint ref="test:CodeLabel" />

Could you please give me a push into the right direction? If you prefer to answer in French, i think i will be able to read or translate it!

Merci beaucoup!

Koen Bonnet
Member II

Re: Bonjour à Tous et à Toutes,J'utilise actuellement...

Salut France,

I posted my question also on the english speaking forum. The problem is solved. You can read the replies at the english forum:

Merci beaucoup!

Koen Bonnet
Active Member

Re: Bonjour à Tous et à Toutes,J'utilise actuellement...

Hi Koen,

Since we did absolutely nothing on the French side, don't mention it Smiley Happy
Anyway, it's good to see that your problem is now solved. Thanks for the feedback !