/*
 * 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.fluss.metrics.groups;

import org.apache.fluss.annotation.Internal;
import org.apache.fluss.metrics.CharacterFilter;
import org.apache.fluss.metrics.registry.MetricRegistry;

/** A simple named {@link MetricGroup} that is used to hold subgroups of metrics. */
@Internal
public class GenericMetricGroup extends AbstractMetricGroup {

    /** The name of this group. */
    private final String name;

    public GenericMetricGroup(MetricRegistry registry, AbstractMetricGroup parent, String name) {
        super(registry, makeScopeComponents(parent, name), parent);
        this.name = name;
    }

    // ------------------------------------------------------------------------

    private static String[] makeScopeComponents(AbstractMetricGroup parent, String name) {
        if (parent != null) {
            String[] parentComponents = parent.getScopeComponents();
            if (parentComponents != null && parentComponents.length > 0) {
                String[] parts = new String[parentComponents.length + 1];
                System.arraycopy(parentComponents, 0, parts, 0, parentComponents.length);
                parts[parts.length - 1] = name;
                return parts;
            }
        }
        return new String[] {name};
    }

    @Override
    protected String getGroupName(CharacterFilter filter) {
        return filter.filterCharacters(name);
    }
}
