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The OWASP Security Logging project provides developers and ops personnel with APIs for logging security-related events.

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/*
 * Licensed 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.owasp.security.logging;

import java.util.Arrays;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.Set;
import org.slf4j.Marker;

/**
 *
 * @author August Detlefsen [[email protected]]
 */
public class MultiMarker implements org.slf4j.Marker {

    private String name = "";
    private final Set references = new LinkedHashSet();

    public MultiMarker(Marker... markers) {
        references.addAll(Arrays.asList(markers));
        updateName();
    }

    public String getName() {
        return name;
    }

    public void add(Marker reference) {
        references.add(reference);
        updateName();
    }

    public boolean remove(Marker reference) {
        boolean output = references.remove(reference);
        updateName();
        return output;
    }

    private void updateName() {
        name = "";
        for (Marker ref : references) {
            if (!Utils.isEmpty(name)) {
                name += " ";
            }
            name += ref.getName();
        }
    }

    public boolean hasChildren() {
        return true;
    }

    public boolean hasReferences() {
        return true;
    }

    public Iterator iterator() {
        return references.iterator();
    }

    public boolean contains(Marker other) {
        for (Marker ref : references) {
            if (ref.contains(other)) {
                return true;
            }
        }
        return false;
    }

    public boolean contains(String name) {
        for (Marker ref : references) {
            if (ref.contains(name)) {
                return true;
            }
        }
        return false;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (!(obj instanceof Marker)) {
            return false;
        }

        final Marker other = (Marker) obj;
        return name.equals(other.getName());
    }

    @Override
    public int hashCode() {
        return name.hashCode();
    }

    @Override
    public String toString() {
        return name;
    }
}