内容摘要：在很多方面，将数组和集合存储到对象数据库中并不总与存储常规的结构化对象不同，只是要注意数组不能被直接查询，而集合则可以。不管出于何种目的，这都意味着可以在建模时使用集合和数组，而不必等到持久引擎需要使用集合或数组时才使用它们。
清单 5. 搜索住房和家庭
@Test public void testTheStorageOfAddresses()
{
List＜Person＞ maleTates =
db.query(new Predicate＜Person＞() {
public boolean match(Person candidate) {
return candidate.getLastName().equals("Tate") &&
candidate.getGender().equals(Gender.MALE);
}
});
Person bruce = maleTates.get(0);
Address homeAndWork =
new Address("5 Maple Drive", "Austin",
"TX", "12345");
Address vacation =
new Address("10 Wanahokalugi Way", "Oahu",
"HA", "11223");
assertTrue(bruce.getHomeAddress().equals(homeAndWork));
assertTrue(bruce.getWorkAddress().equals(homeAndWork));
assertTrue(bruce.getVacationAddress().equals(vacation));
}
@Test public void testTheStorageOfChildren()
{
List＜Person＞ maleTates =
db.query(new Predicate＜Person＞() {
public boolean match(Person candidate) {
return candidate.getLastName().equals("Tate") &&
candidate.getGender().equals(Gender.MALE);
}
});
Person bruce = maleTates.get(0);
int n = 0;
for (Iterator＜Person＞ children = bruce.getChildren();
children.hasNext();
)
{
Person child = children.next();
System.out.println(child);
if (n==0) assertTrue(child.getFirstName().equals("Kayla"));
if (n==1) assertTrue(child.getFirstName().equals("Julia"));
n++;
}
}
责编：豆豆技术应用