| gvSIG desktop 1

package org.gvsig.tools.persistence;

import java.util.HashMap;

import java.util.Map;

import org.gvsig.tools.ToolsLocator;

public abstract class AbstractPersistenceManager implements PersistenceManager {

        protected Map alias;

        public static PersistentState getState(Persistent obj)

                        throws PersistenceException {

                PersistenceManager manager = ToolsLocator.getPersistenceManager();

                PersistentState state = manager.createState(obj, true);

                return state;

        }

        protected AbstractPersistenceManager() {

                alias = new HashMap();

        }

        public void addAlias(String name, Class aClass) {

                alias.put(name, aClass);

        }

        public void addAlias(String name, String className) {

                alias.put(name, className);

        }

        public PersistentState createState(Object obj) throws PersistenceException {

                return createState(obj, true);

        }

        public Object create(PersistentState state) throws PersistenceException {

                String className = state.getTheClassName();

                if (className == null) {

                        throw new PersistenceException(null); // FIXME

                }

                try {

                        Class theClass;

                        Object x = alias.get(className);

                        if (x instanceof Class) {

                                theClass = (Class) x;

                        } else if (x instanceof String) {

                                theClass = Class.forName((String) x);

                        } else { // x is null

                                theClass = Class.forName(className);

                        }

                        Persistent obj = (Persistent) theClass.newInstance();

                        obj.setState(state);

                        return obj;

                } catch (ClassNotFoundException e) {

                        throw new PersistenceException(e);

                } catch (InstantiationException e) {

                        throw new PersistenceException(e);

                } catch (IllegalAccessException e) {

                        throw new PersistenceException(e);

                }

        }

}