Hibernate Criteria：為Criteria和DetachedCriteria添加限制

Question

目前，我們的查詢添加了各種限制，以確保結果被視為活動或實時。 這些限制在幾個地方/查詢中使用，因此設置方法類似於

 public Criteria addStandardCriteria(Criteria criteria, ...) {
      // Add restrictions, create aliases based on parameters
      //     and other non-trivial logic
     criteria.add(...);
     return criteria;
 }

到目前為止，此工作正常，但現在需要使用DetachedCriteria將此標准條件添加到子查詢中。 有沒有辦法修改此方法以接受Criteria或DetachedCriteria或更好的方法來添加限制？

Answer 1

我最終重寫了查詢，所以這不再是一個問題，但在此之前，我創建了這個似乎有效的課程，但你的里程可能會有所不同：

 public class CriteriaContainer implements Serializable {

    private static final long serialVersionUID = 1L;

    private Criteria criteria = null;
    private DetachedCriteria detachedCriteria = null;

    public CriteriaContainer(Criteria criteria) {
        this.criteria = criteria;
        this.detachedCriteria = null;
    }

    public CriteriaContainer(DetachedCriteria detachedCriteria) {
        this.detachedCriteria = detachedCriteria;
        this.criteria = null;
    }

    /**
     * @param eq
     * @return 
     */
    public CriteriaContainer add(final Criterion eq) {
        if (criteria != null) {
            criteria.add(eq);
        } else if (detachedCriteria != null) {
            detachedCriteria.add(eq);
        }
        return this;
    }

    /**
     * @return the criteria
     */
    public Criteria getCriteria() {
        return criteria;
    }

    /**
     * @return the detachedCriteria
     */
    public DetachedCriteria getDetachedCriteria() {
        return detachedCriteria;
    }

    /**
     * @param associationPath
     * @param alias
     * @return 
     */
    public CriteriaContainer createAlias(final String associationPath, final String alias) {
        if (criteria != null) {
            criteria.createAlias(associationPath, alias);
        } else if (detachedCriteria != null) {
            detachedCriteria.createAlias(associationPath, alias);
        }
        return this;
    }

    /**
     * @param distinctRootEntity
     * @return 
     */
    public CriteriaContainer setResultTransformer(final ResultTransformer transformer) {
        if (criteria != null) {
            criteria.setResultTransformer(transformer);
        } else if (detachedCriteria != null) {
            detachedCriteria.setResultTransformer(transformer);
        }
        return this;
    }
}

criteria = addBasicCriteria(new CriteriaContainer(criteria), ...).getCriteria()
detachedCriteria = addBasicCriteria(new CriteriaContainer(detachedCriteria), ...).getDetachedCriteria()