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148 lines
4.7 KiB
HTML
148 lines
4.7 KiB
HTML
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>Inventory.java</title>
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<link rel="stylesheet" href="gettingStarted.css" type="text/css" />
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<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
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<link rel="start" href="index.html" title="Getting Started with Berkeley DB Java Edition" />
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<link rel="up" href="dpl_example.html" title="Chapter 6. A DPL Example" />
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<link rel="prev" href="dpl_example.html" title="Chapter 6. A DPL Example" />
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<link rel="next" href="mydbenv-persist.html" title="MyDbEnv" />
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</head>
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<body>
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<div xmlns="" class="navheader">
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<div class="libver">
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<p>Library Version 12.2.7.5</p>
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</div>
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<table width="100%" summary="Navigation header">
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<tr>
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<th colspan="3" align="center">Inventory.java</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="dpl_example.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 6. A DPL Example</th>
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<td width="20%" align="right"> <a accesskey="n" href="mydbenv-persist.html">Next</a></td>
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</tr>
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</table>
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<hr />
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</div>
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<div class="sect1" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h2 class="title" style="clear: both"><a id="inventoryclass"></a>Inventory.java</h2>
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</div>
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</div>
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</div>
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<p>
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Our example's <code class="classname">Inventory</code>
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class is much like our <code class="classname">Vendor</code>
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class in that it is simply used to encapsulate
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data. However, in this case we want to be able
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to access objects two different ways: by
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product SKU and by product name.
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</p>
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<p>
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In our data set, the product SKU is required to be
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unique, so we use that as the primary key. The
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product name, however, is not a unique value so we
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set this up as a secondary key.
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</p>
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<p>
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The class appears as follows in our example:
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</p>
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<pre class="programlisting">package persist.gettingStarted;
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import com.sleepycat.persist.model.Entity;
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import com.sleepycat.persist.model.PrimaryKey;
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import static com.sleepycat.persist.model.Relationship.*;
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import com.sleepycat.persist.model.SecondaryKey;
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@Entity
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public class Inventory {
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// Primary key is sku
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@PrimaryKey
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private String sku;
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// Secondary key is the itemName
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@SecondaryKey(relate=MANY_TO_ONE)
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private String itemName;
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private String category;
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private String vendor;
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private int vendorInventory;
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private float vendorPrice;
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public void setSku(String data) {
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sku = data;
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}
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public void setItemName(String data) {
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itemName = data;
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}
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public void setCategory(String data) {
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category = data;
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}
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public void setVendorInventory(int data) {
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vendorInventory = data;
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}
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public void setVendor(String data) {
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vendor = data;
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}
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public void setVendorPrice(float data) {
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vendorPrice = data;
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}
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public String getSku() {
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return sku;
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}
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public String getItemName() {
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return itemName;
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}
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public String getCategory() {
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return category;
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}
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public int getVendorInventory() {
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return vendorInventory;
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}
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public String getVendor() {
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return vendor;
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}
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public float getVendorPrice() {
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return vendorPrice;
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}
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} </pre>
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</div>
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<div class="navfooter">
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<hr />
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<table width="100%" summary="Navigation footer">
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<a accesskey="u" href="dpl_example.html">Up</a>
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</td>
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<td width="40%" align="right"> <a accesskey="n" href="mydbenv-persist.html">Next</a></td>
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</tr>
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<tr>
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<td width="40%" align="left" valign="top">Chapter 6. A DPL Example </td>
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<td width="20%" align="center">
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<a accesskey="h" href="index.html">Home</a>
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</td>
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<td width="40%" align="right" valign="top"> MyDbEnv</td>
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