How to Use Hibernate Restrictions with AND Operator?

What is the correct way to use Hibernate restrictions with the AND operator?

// Example of using restrictions with AND operator in Hibernate Query
Criteria criteria = session.createCriteria(YourEntity.class);
criteria.add(Restrictions.eq("field1", value1));
criteria.add(Restrictions.eq("field2", value2));
List results = criteria.list();

In Hibernate, the Criteria API allows you to build queries programmatically. When filtering data with multiple criteria, using the AND operator is a common requirement. This can be easily achieved using the `Restrictions` class which provides numerous methods to construct queries.

// Using Restrictions with AND conditions in Hibernate
Criteria criteria = session.createCriteria(YourEntity.class);
criteria.add(Restrictions.eq("field1", value1));
criteria.add(Restrictions.eq("field2", value2)); // This will create an implicit AND.
List<List<YourEntity>> results = criteria.list();

Causes

• Misunderstanding the Criteria API's syntax and structure.
• Not using the correct method to combine restrictions.

Solutions

• Use `Restrictions.eq()` for equality checks on fields.
• Call `criteria.add()` multiple times to apply AND logic implicitly.
• Leverage the `Restrictions.and()` method for more complex conditions when required.

Mistake: Not understanding that adding multiple restrictions automatically uses AND logic.

Solution: Simply adding multiple `criteria.add(Restrictions.eq(...))` calls will combine criteria with AND.

Mistake: Confusing Restrictions with SQL WHERE clause functionality.

Solution: Remember that Restrictions provide a Java-friendly interface to build queries instead of raw SQL.