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<p>
Our example's <tt class="classname">Inventory</tt>
class is much like our <tt class="classname">Vendor</tt>
class in that it is simply used to encapsulate
data. However, in this case we want to be able
to access objects two different ways: by
product SKU and by product name.
</p>
<p>
In our data set, the product SKU is required to be
unique, so we use that as the primary key. The
product name, however, is not a unique value so we
set this up as a secondary key.
</p>
<p>
The class appears as follows in our example:
</p>
<pre class="programlisting">package persist.gettingStarted;
import com.sleepycat.persist.model.Entity;
import com.sleepycat.persist.model.PrimaryKey;
import static com.sleepycat.persist.model.Relationship.*;
import com.sleepycat.persist.model.SecondaryKey;
@Entity
public class Inventory {
// Primary key is sku
@PrimaryKey
private String sku;
// Secondary key is the itemName
@SecondaryKey(relate=MANY_TO_ONE)
private String itemName;
private String category;
private String vendor;
private int vendorInventory;
private float vendorPrice;
public void setSku(String data) {
sku = data;
}
public void setItemName(String data) {
itemName = data;
}
public void setCategory(String data) {
category = data;
}
public void setVendorInventory(int data) {
vendorInventory = data;
}
public void setVendor(String data) {
vendor = data;
}
public void setVendorPrice(float data) {
vendorPrice = data;
}
public String getSku() {
return sku;
}
public String getItemName() {
return itemName;
}
public String getCategory() {
return category;
}
public int getVendorInventory() {
return vendorInventory;
}
public String getVendor() {
return vendor;
}
public float getVendorPrice() {
return vendorPrice;
}
} </pre>
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