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Binding between SLF4J API and Log4J2 Core

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/*
 * 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.slf4j.helpers;

import org.slf4j.IMarkerFactory;
import org.slf4j.Marker;

import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;

/**
 *
 */
public class Log4JMarkerFactory implements IMarkerFactory {

    private final ConcurrentMap markerMap = new ConcurrentHashMap();

    public Marker getMarker(final String name) {
        if (name == null) {
            throw new IllegalArgumentException("Marker name must not be null");
        }
        Marker marker = markerMap.get(name);
        if (marker == null) {
            marker = new MarkerWrapper(name);
        }
        return marker;
    }

    public boolean exists(final String name) {
        return markerMap.containsKey(name);
    }

    public boolean detachMarker(final String name) {
        return false;
    }

    public Marker getDetachedMarker(final String name) {
        return new MarkerWrapper(name);
    }
}