| /* |
| * 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.logging.log4j; |
| |
| import java.io.Serializable; |
| |
| /** |
| * Markers are objects that are used to add easily filterable information to log messages. |
| * |
| * Markers can be hierarchical - each Marker may have a parent. This allows for broad categories being subdivided into |
| * more specific categories. An example might be a Marker named "Error" with children named "SystemError" and |
| * "ApplicationError". |
| */ |
| public interface Marker extends Serializable { |
| |
| /** |
| * Adds a Marker as a parent to this Marker. |
| * |
| * @param markers The parent markers to add. |
| * @return The current Marker object, thus allowing multiple adds to be concatenated. |
| * @throws IllegalArgumentException if the argument is {@code null} |
| */ |
| Marker addParents(Marker... markers); |
| |
| /** |
| * Returns true if the given marker has the same name as this marker. |
| * |
| * @param obj the reference object with which to compare. |
| * @return true if the given marker has the same name as this marker. |
| * @since 2.4 |
| */ |
| @Override |
| boolean equals(Object obj); |
| |
| /** |
| * Returns the name of this Marker. |
| * |
| * @return The name of the Marker. |
| */ |
| String getName(); |
| |
| /** |
| * Returns a list of parents of this Marker. |
| * |
| * @return The parent Markers or {@code null} if this Marker has no parents. |
| */ |
| Marker[] getParents(); |
| |
| /** |
| * Returns a hash code value based on the name of this marker. Markers are equal if they have the same name. |
| * |
| * @return the computed hash code |
| * @since 2.4 |
| */ |
| @Override |
| int hashCode(); |
| |
| /** |
| * Indicates whether this Marker has references to any other Markers. |
| * |
| * @return {@code true} if the Marker has parent Markers |
| */ |
| boolean hasParents(); |
| |
| /** |
| * Checks whether this Marker is an instance of the specified Marker. |
| * |
| * @param m The Marker to check. |
| * @return {@code true} if this Marker or one of its ancestors is the specified Marker, {@code false} otherwise. |
| * @throws IllegalArgumentException if the argument is {@code null} |
| */ |
| boolean isInstanceOf(Marker m); |
| |
| /** |
| * Checks whether this Marker is an instance of the specified Marker. |
| * |
| * @param name The name of the Marker. |
| * @return {@code true} if this Marker or one of its ancestors matches the specified name, {@code false} otherwise. |
| * @throws IllegalArgumentException if the argument is {@code null} |
| */ |
| boolean isInstanceOf(String name); |
| |
| /** |
| * Removes the specified Marker as a parent of this Marker. |
| * |
| * @param marker The marker to remove. |
| * @return {@code true} if the marker was removed. |
| * @throws IllegalArgumentException if the argument is {@code null} |
| */ |
| boolean remove(Marker marker); |
| |
| /** |
| * Replaces the set of parent Markers with the provided Markers. |
| * |
| * @param markers The new set of parent Markers or {@code null} to clear the parents. |
| * @return The current Marker object. |
| */ |
| Marker setParents(Marker... markers); |
| } |