DefaultQueryModelService.java 文件源码

/**
 * 
 * Append the entity attribute name to the JPQL query statement.
 * 
 * @param jpqlStatement
 * @param jpaEntity
 * @param attribute
 * @throws java.lang.SecurityException 
 * @throws NoSuchFieldException 
 * @throws ClassNotFoundException 
 */
private void appendEntityAttributeName(StringBuilder jpqlStatement, JpaEntity jpaEntity, EntityAttribute attribute, AtomicInteger aliasUnicityKey, AtomicInteger joinAdditionsOffset) throws NoSuchFieldException, java.lang.SecurityException, ClassNotFoundException {
    Class<?> entityClass = Class.forName(jpaEntity.getClassName());
    Field field = entityClass.getDeclaredField(attribute.getAttributeName());
    boolean isJointRelationship = 
            field.getAnnotation(OneToOne.class) != null
            || field.getAnnotation(OneToMany.class) != null
            || field.getAnnotation(ManyToOne.class) != null
            || field.getAnnotation(ManyToMany.class) != null;
    if(isJointRelationship) {
        StringBuilder joinFragment = new StringBuilder();
        Queue<String> objectTreePath = extractDotSeparatedPathFragments(attribute.getPossibleValueLabelAttributePath());
        completeJoinFragment(joinFragment, entityClass, objectTreePath, aliasUnicityKey);
        jpqlStatement.insert(joinAdditionsOffset.get(), joinFragment);
        joinAdditionsOffset.set(joinAdditionsOffset.get() + joinFragment.length());
        jpqlStatement.append(" x").append(aliasUnicityKey.get()).append('.').append(attribute.getPossibleValueLabelAttribute());
    } else {
        jpqlStatement.append(" x.").append(attribute.getAttributeName());
    }
}