private void evaluationJoinChain(TableFilter filter) {
TableMate table1 = (TableMate) filter.getTable();
Column[] columns1 = table1.getRuleColumns();
if (columns1 == null) {
throw new IllegalArgumentException("not sharding TableFilter");
}
ArrayList<IndexCondition> conditions = getIndexConditions(filter);
List<IndexCondition> masks = New.arrayList(10);
List<Column> compareColumns = New.arrayList(10);
for (Column column : columns1) {
for (IndexCondition condition : conditions) {
Column compareColumn = condition.getCompareColumn();
if ((condition.getMask(conditions) & IndexCondition.EQUALITY)
!= IndexCondition.EQUALITY) {
continue;
}
if (condition.getColumn() != column || compareColumn == null) {
continue;
}
masks.add(condition);
compareColumns.add(compareColumn);
}
}
Set<Table> tables = New.hashSet();
for (IndexCondition mask : masks) {
Column compareColumn = mask.getCompareColumn();
Table table = compareColumn.getTable();
if (!(table instanceof TableMate)) {
continue;
}
TableMate tableMate = (TableMate) table;
Column[] rc = tableMate.getRuleColumns();
if (compareColumns.containsAll(Arrays.asList(rc))) {
tables.add(table);
}
}
if (tables.isEmpty()) {
return;
}
for (Table table : tables) {
for (TableFilter tf : filters) {
if (tf.getTable() == table && !joinTableChain.contains(tf)) {
joinTableChain.add(tf);
evaluationJoinChain(tf);
}
}
}
}
private boolean isGropTableFilter(TableFilter filter) {
TableMate table1 = (TableMate) filter.getTable();
for (TableFilter item : filters) {
if (item == filter || isNestedJoinTable(item)) {
continue;
}
TableMate table2 = (TableMate) item.getTable();
TableRule rule1 = table1.getTableRule();
TableRule rule2 = table2.getTableRule();
if (!rule1.isNodeComparable(rule2)) {
return false;
}
}
return true;
}
private boolean isDirectLookup() {
for (TableFilter tf : filters) {
if (!tf.isFromTableMate() && !isNestedJoinTable(tf)) {
return false;
}
}
if (filters.size() == 1) {
return true;
} else {
List<TableFilter> shardingTableFilter = New.arrayList();
for (TableFilter tf : filters) {
if (isNestedJoinTable(tf)) {
continue;
}
if (!isGropTableFilter(tf)) {
return false;
}
TableMate table = (TableMate) tf.getTable();
if (table.getRuleColumns() != null) {
shardingTableFilter.add(tf);
}
}
if (shardingTableFilter.size() < 2) {
return true;
}
this.joinTableChain = New.hashSet();
evaluationJoinChain(shardingTableFilter.iterator().next());
return joinTableChain.containsAll(shardingTableFilter);
}
}
private boolean isNestedJoinTable(TableFilter f) {
return f.getTable() instanceof RangeTable
&& StringUtils.startsWith(f.getTableAlias(), Constants.PREFIX_JOIN);
}