Composite entity pattern

package corepatterns.apps.psa.ejb;

import corepatterns.apps.psa.core.*;
import corepatterns.apps.psa.dao.*;
import java.sql.*;
import javax.sql.*;
import java.util.*;
import javax.ejb.*;
import javax.naming.*;

public class ResourceEntity implements EntityBean {
    public String employeeId;
    public String lastName;
    public String firstName;
    public String departmentId;
    public String practiceGroup;
    public String title;
    public String grade;
    public String email;
    public String phone;
    public String cell;
    public String pager;
    public String managerId;
    
    // Collection of BlockOutTime Dependent objects
    public Collection blockoutTimes;

    // Collection of SkillSet Dependent objects
    public Collection skillSets;

    ...

    private EntityContext context;
// Entity Bean methods implementation
public String ejbCreate(ResourceTO resource) throws 
    CreateException {
        try {
            this.employeeId = resource.employeeId;
            setResourceData(resource);
            getResourceDAO().create(resource);
        } catch(Exception ex) {
            throw new EJBException("Reason:" + ...);
        }
        return this.employeeId;
}
    
public String ejbFindByPrimaryKey(String primaryKey) 
    throws FinderException {
        boolean result;
        try {
            ResourceDAO resourceDAO = getResourceDAO();
            result = 
                resourceDAO.selectByPrimaryKey(primaryKey);
        } catch(Exception ex) {
            throw new EJBException("Reason:" + ...);
        }
        if (result) {
            return primaryKey;
        }
        else {
            throw new ObjectNotFoundException(...);
        }
    }
    
    public void ejbRemove() {
        try {
            // Remove dependent objects
            if (this.skillSets != null) {

                SkillSetDAO skillSetDAO = getSkillSetDAO();
                skillSetDAO.setResourceID(employeeId);
                skillSetDAO.deleteAll();
                skillSets = null;
            }
            if (this.blockoutTime != null) {
                BlockOutTimeDAO blockouttimeDAO = 
                        getBlockOutTimeDAO();
                blockouttimeDAO.setResourceID(employeeId);
                blockouttimeDAO.deleteAll();
                blockOutTimes = null;
            }

            // Remove the resource from the persistent store
            ResourceDAO resourceDAO = new 
                ResourceDAO(employeeId);
            resourceDAO.delete();
        } catch(ResourceException ex) {
            throw new EJBException("Reason:"+...);
        } catch(BlockOutTimeException ex) {
            throw new EJBException("Reason:"+...);
        } catch(Exception exception) {
            ...
        }
    }
    public void setEntityContext(EntityContext context) 
    {
        this.context = context;
    }
    
    public void unsetEntityContext() {
        context = null;
    }
    
    public void ejbActivate() {
        employeeId = (String)context.getPrimaryKey();
    }
    
    public void ejbPassivate() {
        employeeId = null;
    }
    
    public void ejbLoad() {
        try {
            // load the resource info from
            ResourceDAO resourceDAO = getResourceDAO();
            setResourceData((ResourceTO) 
                resourceDAO.load(employeeId));
            
            // Load other dependent objects, if necessary
            ...
        } catch(Exception ex) {
            throw new EJBException("Reason:" + ...);
        }
    }
    
    public void ejbStore() {
        try {
            // Store resource information
            getResourceDAO().update(getResourceData());

            // Store dependent objects as needed
            ...
        } catch(SkillSetException ex) {
            throw new EJBException("Reason:" + ...);
        } catch(BlockOutTimeException ex) {
            throw new EJBException("Reason:" + ...);
        }
        ...
    }
    public void ejbPostCreate(ResourceTO resource) {
    }

    // Method to Get Resource Transfer Object
    public ResourceTO getResourceTO() {
        // create a new Resource Transfer Object
        ResourceTO resourceTO = new 
                ResourceTO(employeeId);

        // copy all values 
        resourceTO.lastName = lastName;
        resourceTO.firstName = firstName;
        resourceTO.departmentId = departmentId;
        ...
        return resourceTO;
    }

    public void setResourceData(ResourceTO resourceTO) {
        // copy values from Transfer Object into entity bean
        employeeId = resourceTO.employeeId;
        lastName = resourceTO.lastName;
        ...
    }

    // Method to get dependent Transfer Objects
    public Collection getSkillSetsData() {
        // If skillSets is not loaded, load it first.
        // See Lazy Load strategy implementation.

        return skillSets;    
    }
    ...

    // other get and set methods as needed
    ...

    // Entity bean business methods
    public void addBlockOutTimes(Collection moreBOTs) 
    throws BlockOutTimeException {
        // Note: moreBOTs is a collection of 
        // BlockOutTimeTO objects
        try {
            Iterator moreIter = moreBOTs.iterator();
            while (moreIter.hasNext()) {
                BlockOutTimeTO botTO = (BlockOutTimeTO) 
                                                    moreIter.next();
                if (! (blockOutTimeExists(botTO))) {
                    // add BlockOutTimeTO to collection
                    botTO.setNew();
                    blockOutTime.add(botTO);
                } else {
                    // BlockOutTimeTO already exists, cannot add
                    throw new BlockOutTimeException(...);
                }
            }
        } catch(Exception exception) {
            throw new EJBException(...);
        }
    }

    public void addSkillSet(Collection moreSkills) 
    throws SkillSetException {
        // similar to addBlockOutTime() implementation
        ...
    }

    ...

    public void updateBlockOutTime(Collection updBOTs) 
    throws BlockOutTimeException {
        try {
            Iterator botIter = blockOutTimes.iterator();
            Iterator updIter = updBOTs.iterator();
            while (updIter.hasNext()) {
                BlockOutTimeTO botTO = (BlockOutTimeTO)
                    updIter.next();
                while (botIter.hasNext()) {
                    BlockOutTimeTO existingBOT = 
                        (BlockOutTimeTO) botIter.next();
                    // compare key values to locate BlockOutTime
                    if (existingBOT.equals(botTO)) {
                        // Found BlockOutTime in collection
                        // replace old BlockOutTimeTO with new one
                        botTO.setDirty(); //modified old dependent
                        botTO.resetNew(); //not a new dependent
                        existingBOT = botTO;
                    }
                }
            }
        } catch (Exception exc) {
            throw new EJBException(...);
        }
    }

    public void updateSkillSet(Collection updSkills) 
    throws CommitmentException {
        // similar to updateBlockOutTime...
        ...
    }

    ...

}