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/*
 * Copyright (C) 2009 The Android Open Source Project
 *
 * 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 dalvik.system;

/**
 * Utility methods for logging to {@code DalvikHandlers}.
 *
 * @hide
 */
public final class DalvikLogging {
    private DalvikLogging() {}

    /**
     * Returns the short logger tag (up to 23 chars) for the given logger name.
     * Traditionally loggers are named by fully-qualified Java classes; this
     * method attempts to return a concise identifying part of such names.
     */
    public static String loggerNameToTag(String loggerName) {
        // Anonymous logger.
        if (loggerName == null) {
            return "null";
        }

        int length = loggerName.length();
        if (length <= 23) {
            return loggerName;
        }

        int lastPeriod = loggerName.lastIndexOf(".");
        return length - (lastPeriod + 1) <= 23
                ? loggerName.substring(lastPeriod + 1)
                : loggerName.substring(loggerName.length() - 23);
    }
}




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