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/*
 * Copyright 2019 VMware, Inc.
 *
 * 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
 *
 * https://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.
 */
/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project 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:
 *
 *   https://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 io.micrometer.common.util.internal.logging;

import java.io.ObjectStreamException;
import java.io.Serializable;

import static java.util.Objects.requireNonNull;

/**
 * NOTE: This file has been copied and slightly modified from
 * {io.netty.util.internal.logging}.
 *
 * A skeletal implementation of {@link InternalLogger}. This class implements all methods
 * that have a {@link InternalLogLevel} parameter by default to call specific logger
 * methods such as {@link #info(String)} or {@link #isInfoEnabled()}.
 */
public abstract class AbstractInternalLogger implements InternalLogger, Serializable {

    private static final long serialVersionUID = -6382972526573193470L;

    static final String EXCEPTION_MESSAGE = "Unexpected exception:";

    private final String name;

    /**
     * Creates a new instance.
     * @param name logger name
     */
    protected AbstractInternalLogger(String name) {
        requireNonNull(name, "name");
        this.name = name;
    }

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

    @Override
    public boolean isEnabled(InternalLogLevel level) {
        switch (level) {
            case TRACE:
                return isTraceEnabled();
            case DEBUG:
                return isDebugEnabled();
            case INFO:
                return isInfoEnabled();
            case WARN:
                return isWarnEnabled();
            case ERROR:
                return isErrorEnabled();
            default:
                throw new Error();
        }
    }

    @Override
    public void trace(Throwable t) {
        trace(EXCEPTION_MESSAGE, t);
    }

    @Override
    public void debug(Throwable t) {
        debug(EXCEPTION_MESSAGE, t);
    }

    @Override
    public void info(Throwable t) {
        info(EXCEPTION_MESSAGE, t);
    }

    @Override
    public void warn(Throwable t) {
        warn(EXCEPTION_MESSAGE, t);
    }

    @Override
    public void error(Throwable t) {
        error(EXCEPTION_MESSAGE, t);
    }

    @Override
    public void log(InternalLogLevel level, String msg, Throwable cause) {
        switch (level) {
            case TRACE:
                trace(msg, cause);
                break;
            case DEBUG:
                debug(msg, cause);
                break;
            case INFO:
                info(msg, cause);
                break;
            case WARN:
                warn(msg, cause);
                break;
            case ERROR:
                error(msg, cause);
                break;
            default:
                throw new Error();
        }
    }

    @Override
    public void log(InternalLogLevel level, Throwable cause) {
        switch (level) {
            case TRACE:
                trace(cause);
                break;
            case DEBUG:
                debug(cause);
                break;
            case INFO:
                info(cause);
                break;
            case WARN:
                warn(cause);
                break;
            case ERROR:
                error(cause);
                break;
            default:
                throw new Error();
        }
    }

    @Override
    public void log(InternalLogLevel level, String msg) {
        switch (level) {
            case TRACE:
                trace(msg);
                break;
            case DEBUG:
                debug(msg);
                break;
            case INFO:
                info(msg);
                break;
            case WARN:
                warn(msg);
                break;
            case ERROR:
                error(msg);
                break;
            default:
                throw new Error();
        }
    }

    @Override
    public void log(InternalLogLevel level, String format, Object arg) {
        switch (level) {
            case TRACE:
                trace(format, arg);
                break;
            case DEBUG:
                debug(format, arg);
                break;
            case INFO:
                info(format, arg);
                break;
            case WARN:
                warn(format, arg);
                break;
            case ERROR:
                error(format, arg);
                break;
            default:
                throw new Error();
        }
    }

    @Override
    public void log(InternalLogLevel level, String format, Object argA, Object argB) {
        switch (level) {
            case TRACE:
                trace(format, argA, argB);
                break;
            case DEBUG:
                debug(format, argA, argB);
                break;
            case INFO:
                info(format, argA, argB);
                break;
            case WARN:
                warn(format, argA, argB);
                break;
            case ERROR:
                error(format, argA, argB);
                break;
            default:
                throw new Error();
        }
    }

    @Override
    public void log(InternalLogLevel level, String format, Object... arguments) {
        switch (level) {
            case TRACE:
                trace(format, arguments);
                break;
            case DEBUG:
                debug(format, arguments);
                break;
            case INFO:
                info(format, arguments);
                break;
            case WARN:
                warn(format, arguments);
                break;
            case ERROR:
                error(format, arguments);
                break;
            default:
                throw new Error();
        }
    }

    protected Object readResolve() throws ObjectStreamException {
        return InternalLoggerFactory.getInstance(name());
    }

    @Override
    public String toString() {
        return getClass().getSimpleName() + '(' + name() + ')';
    }

}




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