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/*
 *
 *  * Copyright (C) 2015 Square, 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
 *  *
 *  *      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 com.lark.oapi.okio;

import java.io.IOException;

/**
 * A {@link Sink} which forwards calls to another. Useful for subclassing.
 */
public abstract class ForwardingSink implements Sink {

    private final Sink delegate;

    public ForwardingSink(Sink delegate) {
        if (delegate == null) {
            throw new IllegalArgumentException("delegate == null");
        }
        this.delegate = delegate;
    }

    /**
     * {@link Sink} to which this instance is delegating.
     */
    public final Sink delegate() {
        return delegate;
    }

    @Override
    public void write(Buffer source, long byteCount) throws IOException {
        delegate.write(source, byteCount);
    }

    @Override
    public void flush() throws IOException {
        delegate.flush();
    }

    @Override
    public Timeout timeout() {
        return delegate.timeout();
    }

    @Override
    public void close() throws IOException {
        delegate.close();
    }

    @Override
    public String toString() {
        return getClass().getSimpleName() + "(" + delegate.toString() + ")";
    }
}