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Hibernate Error “Not all named parameters have been set” 1. Introduction When working with Hibernate, we can use named parameters to safely pass data into an SQL query. We assign values to query parameters at runtime to make them dynamic. More importantly, this helps prevent SQL injection attacks. However, we… Continue Reading hibernate-error-named-parameters-not-set
Hibernate @WhereJoinTable Annotation 1. Overview Using an Object Relational Mapping tool, like Hibernate, makes it easy to read our data into objects, but can make forming our queries difficult with complex data models. The many-to-many relationship is always challenging, but it can be more challenging when we wish to acquire related… Continue Reading hibernate-wherejointable
A Collection of Spring Tutorials Persistence REST Security Series Spring Hibernate JPA I started the REST Security project on GitHub to explore writing an elegant REST Services with the latest and greatest Spring had to offer. That was Spring 3.1 and now Spring 3.2, moving towards Spring 4.0 and 4.1.… Continue Reading this-is-not-your-fathers-spring-a-learning-project
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Hibernate Named Query 1. Overview A major disadvantage of having HQL and SQL scattered across data access objects is that it makes the code unreadable. Hence, it might make sense to group all HQL and SQL in one place and use only their reference in the actual data access code.… Continue Reading hibernate-named-query
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Proxy in Hibernate load() Method 1. Overview In this tutorial, we’ll see what a proxy is in the context of Hibernate’s load() method. For readers new to Hibernate, consider getting familiar with basics first. 2. A Brief Introduction To Proxies and load() method By definition, a proxy is “a function authorized… Continue Reading hibernate-proxy-load-method
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Hibernate Mapping Exception – Unknown Entity 1. The Problem This article is going to discuss the org.hibernate.MappingException: Unknown entity issue and solutions, both for Hibernate as well as for a Spring and Hibernate environment. Further reading: Bootstrapping Hibernate 5 with Spring A quick and practical guide to integrating Hibernate 5… Continue Reading hibernate-mappingexception-unknown-entity
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Hibernate Inheritance Mapping 1. Overview Relational databases don’t have a straightforward way to map class hierarchies onto database tables. To address this, the JPA specification provides several strategies: MappedSuperclass – the parent classes, can’t be entities Single Table – the entities from different classes with a common ancestor are placed… Continue Reading hibernate-inheritance
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Simplify the DAO with Spring and Java Generics 1. Overview This article will focus on simplifying the DAO layer by using a single, generified Data Access Object for all entities in the system, which will result in elegant data access, with no unnecessary clutter or verbosity. We’ll build on the… Continue Reading simplifying-the-data-access-layer-with-spring-and-java-generics
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Introduction to Hibernate Spatial 1. Introduction In this article, we’ll have a look a the spatial extension of Hibernate, hibernate-spatial. Starting with version 5, Hibernate Spatial provides a standard interface for working with geographic data. 2. Background on Hibernate Spatial Geographic data includes representation of entities like a Point, Line,… Continue Reading hibernate-spatial
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Hibernate Validator Specific Constraints 1. Overview In this tutorial, we’re going to review Hibernate Validator constraints, which are built into Hibernate Validator but are outside the Bean Validation spec. For a recap of Bean Validation, please refer to our article on Java Bean Validation Basics. 2. Hibernate Validator Setup At the very… Continue Reading hibernate-validator-constraints
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