distributedlog-core/src/main/java/org/apache/distributedlog/logsegment/LogSegmentFilter.java

/**
 * 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.distributedlog.logsegment;

import java.util.Collection;

/**
 * Filter to filter log segments.
 */
public interface LogSegmentFilter {

    LogSegmentFilter DEFAULT_FILTER = new LogSegmentFilter() {
        @Override
        public Collection<String> filter(Collection<String> fullList) {
            return fullList;
        }
    };

    /**
     * Filter the log segments from the full log segment list.
     *
     * @param fullList
     *          full list of log segment names.
     * @return filtered log segment names
     */
    Collection<String> filter(Collection<String> fullList);
}