private <E, T> boolean keepMapping(Collection<E> col1, Collection<T> col2)
throws IllegalAccessException, InstantiationException {
Class claxx1 = col1.iterator().next().getClass();
Class claxx2 = col2.iterator().next().getClass();
EntityTable table1 = TableManager.getTable(claxx1);
EntityTable table2 = TableManager.getTable(claxx2);
if (table1.mappingList != null) {
for (MapProperty mp : table1.mappingList) {
Class itemClass;
Class fieldClass = mp.field.getType();
if (mp.isToMany()) {
// N对多关系
if (ClassUtil.isCollection(fieldClass)) {
itemClass = FieldUtil.getGenericType(mp.field);
} else {
throw new RuntimeException(
"OneToMany and ManyToMany Relation, You must use collection object");
}
} else {
itemClass = fieldClass;
}
if (itemClass == claxx2) {
ArrayList<String> key1List = new ArrayList<String>();
HashMap<String, Object> map1 = new HashMap<String, Object>();
// 构建第1个对象的key集合以及value映射
for (Object o1 : col1) {
if (o1 != null) {
Object key1 = FieldUtil.get(table1.key.field, o1);
if (key1 != null) {
key1List.add(key1.toString());
map1.put(key1.toString(), o1);
}
}
}
ArrayList<Relation> mapList = queryRelation(claxx1, claxx2, key1List, null);
if (!Checker.isEmpty(mapList)) {
HashMap<String, Object> map2 = new HashMap<String, Object>();
// 构建第2个对象的value映射
for (Object o2 : col2) {
if (o2 != null) {
Object key2 = FieldUtil.get(table2.key.field, o2);
if (key2 != null) {
map2.put(key2.toString(), o2);
}
}
}
for (Relation m : mapList) {
Object obj1 = map1.get(m.key1);
Object obj2 = map2.get(m.key2);
if (obj1 != null && obj2 != null) {
if (mp.isToMany()) {
// N对多关系
if (ClassUtil.isCollection(fieldClass)) {
Collection col = (Collection) FieldUtil.get(mp.field, obj1);
if (col == null) {
col = (Collection) fieldClass.newInstance();
FieldUtil.set(mp.field, obj1, col);
}
col.add(obj2);
} else {
throw new RuntimeException(
"OneToMany and ManyToMany Relation, You must use collection object");
}
} else {
FieldUtil.set(mp.field, obj1, obj2);
}
}
}
return true;
}
}
}
}
return false;
}
