| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.cassandra.repair.consistent.admin; |
| |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import com.google.common.base.Preconditions; |
| import com.google.common.collect.Iterables; |
| import com.google.common.collect.Lists; |
| |
| import org.apache.cassandra.db.ColumnFamilyStore; |
| import org.apache.cassandra.db.Keyspace; |
| import org.apache.cassandra.schema.Schema; |
| import org.apache.cassandra.utils.AbstractIterator; |
| |
| public class SchemaArgsParser implements Iterable<ColumnFamilyStore> |
| { |
| |
| private final List<String> schemaArgs; |
| |
| private SchemaArgsParser(List<String> schemaArgs) |
| { |
| this.schemaArgs = schemaArgs; |
| } |
| |
| private static class TableIterator extends AbstractIterator<ColumnFamilyStore> |
| { |
| private final Iterator<ColumnFamilyStore> tables; |
| |
| public TableIterator(String ksName, List<String> tableNames) |
| { |
| Preconditions.checkArgument(Schema.instance.getKeyspaceMetadata(ksName) != null); |
| Keyspace keyspace = Keyspace.open(ksName); |
| |
| if (tableNames.isEmpty()) |
| { |
| tables = keyspace.getColumnFamilyStores().iterator(); |
| } |
| else |
| { |
| tables = Lists.newArrayList(Iterables.transform(tableNames, tn -> keyspace.getColumnFamilyStore(tn))).iterator(); |
| } |
| } |
| |
| @Override |
| protected ColumnFamilyStore computeNext() |
| { |
| return tables.hasNext() ? tables.next() : endOfData(); |
| } |
| } |
| |
| @Override |
| public Iterator<ColumnFamilyStore> iterator() |
| { |
| if (schemaArgs.isEmpty()) |
| { |
| // iterate over everything |
| Iterator<String> ksNames = Schema.instance.getNonLocalStrategyKeyspaces().iterator(); |
| |
| return new AbstractIterator<ColumnFamilyStore>() |
| { |
| TableIterator current = null; |
| protected ColumnFamilyStore computeNext() |
| { |
| for (;;) |
| { |
| if (current != null && current.hasNext()) |
| { |
| return current.next(); |
| } |
| |
| if (ksNames.hasNext()) |
| { |
| current = new TableIterator(ksNames.next(), Collections.emptyList()); |
| continue; |
| } |
| |
| return endOfData(); |
| } |
| } |
| }; |
| |
| } |
| else |
| { |
| return new TableIterator(schemaArgs.get(0), schemaArgs.subList(1, schemaArgs.size())); |
| } |
| } |
| |
| public static Iterable<ColumnFamilyStore> parse(List<String> schemaArgs) |
| { |
| return new SchemaArgsParser(schemaArgs); |
| } |
| |
| public static Iterable<ColumnFamilyStore> parse(String... schemaArgs) |
| { |
| return parse(Lists.newArrayList(schemaArgs)); |
| } |
| } |