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/*
* Copyright 2014 The gRPC 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 io.grpc;
import java.io.IOException;
/**
* An {@link java.io.InputStream} or alike whose total number of bytes that can be read is known
* upfront.
*
* Usually it's a {@link java.io.InputStream} that also implements this interface, in which case
* {@link java.io.InputStream#available()} has a stronger semantic by returning an accurate number
* instead of an estimation.
*/
public interface KnownLength {
/**
* Returns the total number of bytes that can be read (or skipped over) from this object until all
* bytes have been read out.
*/
int available() throws IOException;
}