How to use Hibernate Criteria objects for multiple and/or conditions

问题

I need to create a Hibernate criteria restriction that ors 3 Conditions. The problem is that the last condition is acutally to conditions using the AND operator.

My first condition:

Criterion startInRange = Restrictions.between("expectedStartCanonicDate", 
                                               rangeStart, rangeEnd);

My second condition:

Criterion endInRange = Restrictions.between("expectedCompletionCanonicDate", 
                                             rangeStart, rangeEnd);

MY third condition needs to AND the following two conditions together:

criteria.add(Restrictions.le("expectedStartCanonicDate", rangeStart));
criteria.add(Restrictions.ge("expectedCompletionCanonicDate", rangeEnd));

The restriction I want to do is condition1 or condition2 or condition3. I have found examples that get me close. I can use a LogicalExpression to or the first two conditions together, however, I'm not sure how to or 3 conditions, particularly when the last condition is really two separate conditions 'anded' together.

Any Thoughts? Fred

回答1:

A sequence of restrictions linked with or is called a disjunction. A sequence of restrictions linked with and is called a conjunction.

So, what you need is

one conjunction for your third condition
one disjunction to link the first, second, and third conditions:

So here it goes:

Criterion startInRange = Restrictions.between("expectedStartCanonicDate", rangeStart, rangeEnd);

Criterion endInRange = Restrictions.between("expectedCompletionCanonicDate", rangeStart, rangeEnd);

Criterion thirdCondition = 
    Restrictions.conjunction().add(Restrictions.le("expectedStartCanonicDate", rangeStart))
                              .add(Restrictions.ge("expectedCompletionCanonicDate", rangeEnd));

Criterion completeCondition = 
    Restrictions.disjunction().add(startInRange)
                              .add(endInRange)
                              .add(thirdCondition);

criteria.add(completeCondition);

回答2:

Criteria criteriaObj = sessionselectreply.createCriteria(TaskReplyVO.class,"taskreply")
                .createAlias("taskreply.objTaskView", "taskview")
                .createAlias("objMailTo", "mailto")
                .add(Restrictions.eq("taskview.longTaskId", taskid))
                .add(Restrictions.eq("mailto.longuserid", userid));

来源：https://stackoverflow.com/questions/8194260/how-to-use-hibernate-criteria-objects-for-multiple-and-or-conditions

标签

hibernate-criteria