| /* |
| * 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.schema; |
| |
| import java.util.Iterator; |
| import java.util.function.Predicate; |
| import java.util.stream.Stream; |
| |
| import com.google.common.collect.ImmutableMap; |
| import com.google.common.collect.MapDifference; |
| import com.google.common.collect.Maps; |
| |
| public final class Keyspaces implements Iterable<KeyspaceMetadata> |
| { |
| private final ImmutableMap<String, KeyspaceMetadata> keyspaces; |
| |
| private Keyspaces(Builder builder) |
| { |
| keyspaces = builder.keyspaces.build(); |
| } |
| |
| public static Builder builder() |
| { |
| return new Builder(); |
| } |
| |
| public static Keyspaces none() |
| { |
| return builder().build(); |
| } |
| |
| public static Keyspaces of(KeyspaceMetadata... keyspaces) |
| { |
| return builder().add(keyspaces).build(); |
| } |
| |
| public Iterator<KeyspaceMetadata> iterator() |
| { |
| return keyspaces.values().iterator(); |
| } |
| |
| public Stream<KeyspaceMetadata> stream() |
| { |
| return keyspaces.values().stream(); |
| } |
| |
| public Keyspaces filter(Predicate<KeyspaceMetadata> predicate) |
| { |
| Builder builder = builder(); |
| stream().filter(predicate).forEach(builder::add); |
| return builder.build(); |
| } |
| |
| MapDifference<String, KeyspaceMetadata> diff(Keyspaces other) |
| { |
| return Maps.difference(keyspaces, other.keyspaces); |
| } |
| |
| @Override |
| public boolean equals(Object o) |
| { |
| return this == o || (o instanceof Keyspaces && keyspaces.equals(((Keyspaces) o).keyspaces)); |
| } |
| |
| @Override |
| public int hashCode() |
| { |
| return keyspaces.hashCode(); |
| } |
| |
| @Override |
| public String toString() |
| { |
| return keyspaces.values().toString(); |
| } |
| |
| public static final class Builder |
| { |
| private final ImmutableMap.Builder<String, KeyspaceMetadata> keyspaces = new ImmutableMap.Builder<>(); |
| |
| private Builder() |
| { |
| } |
| |
| public Keyspaces build() |
| { |
| return new Keyspaces(this); |
| } |
| |
| public Builder add(KeyspaceMetadata keyspace) |
| { |
| keyspaces.put(keyspace.name, keyspace); |
| return this; |
| } |
| |
| public Builder add(KeyspaceMetadata... keyspaces) |
| { |
| for (KeyspaceMetadata keyspace : keyspaces) |
| add(keyspace); |
| return this; |
| } |
| |
| public Builder add(Iterable<KeyspaceMetadata> keyspaces) |
| { |
| keyspaces.forEach(this::add); |
| return this; |
| } |
| } |
| } |