Hibernate

Enterprise network applications must be able to access data stored in relational databases, and when the application is written in Java, there are several different ways to accomplish this. Most of them, such as JDO and JDBC, are complicated. Hibernate, the new "bleeding edge" open source technology, is a simple yet powerful way to work with data in relational databases. The Java-based tool is free, and relatively easy for developers to learn and use. This is the only complete guide to Hibernate available.

Preface

vii

Installation and Setup

1

(12)

Getting an Ant Distribution

1

(2)

Getting the HSQLDB Database Engine

3

(1)

Getting Hibernate

4

(1)

Setting Up a Project Hierarchy

5

(8)

Introduction to Mapping

13

(25)

Writing a Mapping Document

14

(3)

Generating Some Class

17

(7)

Cooking Up a Schema

24

(8)

Connecting Hibernate to MySQL

32

(6)

Harnessing Hibernate

38

(17)

Creating Persistent Objects

38

(9)

Finding Persistent Objects

47

(5)

Better Ways to Build Queries

52

(3)

Collections and Associations

55

(23)

Mapping Collections

55

(8)

Persisting Collections

63

(6)

Retrieving Collections

69

(2)

Using Bidirectional Associations

71

(5)

Working with Simple Collections

76

(2)

Richer Associations

78

(22)

Using Lazy Associations

78

(2)

Ordered Collections

80

(2)

Augmenting Associations in Collections

82

(12)

Lifecycle Associations

94

(3)

Reflexive Associations

97

(3)

Persistent Enumerated Types

100

(11)

Defining a Persistent Enumerated Type

100

(6)

Working with Persistent Enumerations

106

(5)

Custom Value Types

111

(20)

Defining a User Type

112

(4)

Using a Custom Type Mapping

116

(2)

Building a Composite User Type

118

(13)

Criteria Queries

131

(11)

Using Simple Criteria

132

(3)

Compounding Criteria

135

(2)

Applying Criteria to Associations

137

(2)

Querying by Example

139

(3)

A Look at HQL

142

(17)

Writing HQL Queries

142

(5)

Selecting Properties and Pieces

147

(4)

Sorting

151

(1)

Working with Aggregate Values

152

(3)

Writing Native SQL Queries

155

(4)

Appendix A. Hibernate Types

159

(6)

Appendix B. Standard Criteria

165

(3)

Appendix C. Hibernate SQL Dialects

168

(3)

Index

171

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Summary

Table of Contents

Supplemental Materials