[eclipselink-users] Problems Mapping Map

[fed <fury123@xxxxxxxxx>]

Hi,
I have some problems to map an entity that contains a Map association.

The problems is how it maps this association (the code of the classes
that i use is at the end of message)  :

On the database i have 4 tables,  class1, class2, class3 and
class3_class2 that maps the association in the map but this last table
has only 2 column: the class3_id and the hm_id and there is no
reference to Class1 that is the key of the Map, there is not a column
that indicates the MapKey id.

I tried using the @MapKey annotation but has no effect on this.

When i retrieve a stored Class3 object from the database and i look
the keys/values in the Map i see that the keys are the id of the
Class2 object stored in the Map, and the Class1 objects are ignored.

What is wrong with this ?  Seems correct but maybe i miss something.

Thanks for the help.

Bye


These are the classes that i used for test:

// Class1

@Entity
public class Class1 {

        private int id;

        private String string;

        protected Class1(){

        }

        public Class1(String string){
                this.string = string;
        }

        /**
         * @return the id
         */
        @Id
        @GeneratedValue
        public int getId() {
                return id;
        }

        /**
         * @param id the id to set
         */
        public void setId(int id) {
                this.id = id;
        }

        /**
         * @return the string
         */
        public String getString() {
                return string;
        }

        /**
         * @param string the string to set
         */
        public void setString(String string) {
                this.string = string;
        }

        /* (non-Javadoc)
         * @see java.lang.Object#equals(java.lang.Object)
         */
        @Override
        public boolean equals(Object obj) {
                return string.equals(obj);
        }

        /* (non-Javadoc)
         * @see java.lang.Object#hashCode()
         */
        @Override
        public int hashCode() {
                return string.hashCode();
        }

        /* (non-Javadoc)
         * @see java.lang.Object#toString()
         */
        @Override
        public String toString() {
                return string;
        }
}


// Class2

@Entity
public class Class2 {

        private String string;

        private int id;


        protected Class2(){

        }

        public Class2(String string){
                this.string = string;
        }

        /**
         * @return the string
         */
        public String getString() {
                return string;
        }

        /**
         * @param string the string to set
         */
        public void setString(String string) {
                this.string = string;
        }

        /**
         * @return the id
         */
        @Id
        @GeneratedValue
        public int getId() {
                return id;
        }

        /**
         * @param id the id to set
         */
        public void setId(int id) {
                this.id = id;
        }

        /* (non-Javadoc)
         * @see java.lang.Object#equals(java.lang.Object)
         */
        @Override
        public boolean equals(Object obj) {
                return string.equals(obj);
        }

        /* (non-Javadoc)
         * @see java.lang.Object#hashCode()
         */
        @Override
        public int hashCode() {
                return string.hashCode();
        }

        /* (non-Javadoc)
         * @see java.lang.Object#toString()
         */
        @Override
        public String toString() {
                return string;
        }

}

// Class3

@Entity
public class Class3 {

        private int id;

        private Map<Class1,Class2> hm;

        public Class3(){
                hm = new HashMap<Class1,Class2>();
        }

        /**
         * @return the id
         */
        @Id
        @GeneratedValue
        public int getId() {
                return id;
        }

        /**
         * @param id the id to set
         */
        public void setId(int id) {
                this.id = id;
        }

        /**
         * @return the hm
         */
        @ManyToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
        public Map<Class1, Class2> getHm() {
                return hm;
        }

        /**
         * @param hm the hm to set
         */
        public void setHm(Map<Class1, Class2> hm) {
                this.hm = hm;
        }

        public void add_key_value(Class1 c1, Class2 c2){

                hm.put(c1, c2);
        }
}