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3094 vikas 1 
 
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package in.shop2020.server;
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import in.shop2020.model.Item;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.List;
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import javax.jdo.Extent;
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import javax.jdo.JDOHelper;
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import javax.jdo.PersistenceManager;
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import javax.jdo.PersistenceManagerFactory;
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public class ItemRepository {
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	PersistenceManagerFactory pmfInstance = JDOHelper.getPersistenceManagerFactory("transactions-optional");
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	public Collection<Item> getAll() {
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		PersistenceManager pm = pmfInstance.getPersistenceManager();
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		try {
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			List<Item> items = new ArrayList<Item>();
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		    Extent<Item> extent = pm.getExtent(Item.class, false);
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		    for (Item item : extent) {
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		        items.add(item);
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		    }
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		    extent.closeAll();
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		    return items;
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		} finally {
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			pm.close();
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		}
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	}
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	public void create(Item item) {
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		PersistenceManager pm = pmfInstance.getPersistenceManager();
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		try {
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		    pm.makePersistent(item);
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		} finally {
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			pm.close();
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		}
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	}
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	public void deleteById(Long id) {
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		PersistenceManager pm = pmfInstance.getPersistenceManager();
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		try {
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			pm.deletePersistent(pm.getObjectById(Item.class, id));
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		} finally {
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			pm.close();
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		}
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	}
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	public Item getById(Long id) {
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        PersistenceManager pm = pmfInstance.getPersistenceManager();
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        try {
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            return pm.getObjectById(Item.class, id);
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        } finally {
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            pm.close();
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        }
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    }
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}