| /* |
| * 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.lucene.util; |
| |
| |
| import java.util.Collection; |
| import java.util.Collections; |
| |
| /** |
| * An object whose RAM usage can be computed. |
| * |
| * @lucene.internal |
| */ |
| public interface Accountable { |
| |
| /** |
| * Return the memory usage of this object in bytes. Negative values are illegal. |
| */ |
| long ramBytesUsed(); |
| |
| /** |
| * Returns nested resources of this class. |
| * The result should be a point-in-time snapshot (to avoid race conditions). |
| * @see Accountables |
| */ |
| default Collection<Accountable> getChildResources() { |
| return Collections.emptyList(); |
| } |
| |
| } |