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/*
* Copyright (C) 2009 The Guava Authors
*
* 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.google.common.io;
import com.google.common.annotations.Beta;
import com.google.common.annotations.GwtIncompatible;
import com.google.errorprone.annotations.CanIgnoreReturnValue;
import com.google.errorprone.annotations.DoNotMock;
import java.io.IOException;
import org.checkerframework.checker.nullness.qual.Nullable;
/**
* A callback interface to process bytes from a stream.
*
* <p>{@link #processBytes} will be called for each chunk of data that is read, and should return
* {@code false} when you want to stop processing.
*
* @author Chris Nokleberg
* @since 1.0
*/
@Beta
@DoNotMock("Implement it normally")
@GwtIncompatible
@ElementTypesAreNonnullByDefault
public interface ByteProcessor<T extends @Nullable Object> {
/**
* This method will be called for each chunk of bytes in an input stream. The implementation
* should process the bytes from {@code buf[off]} through {@code buf[off + len - 1]} (inclusive).
*
* @param buf the byte array containing the data to process
* @param off the initial offset into the array
* @param len the length of data to be processed
* @return true to continue processing, false to stop
*/
@CanIgnoreReturnValue // some uses know that their processor never returns false
boolean processBytes(byte[] buf, int off, int len) throws IOException;
/** Return the result of processing all the bytes. */
@ParametricNullness
T getResult();
}
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