io.grpc.okhttp.OkHttpReadableBuffer Maven / Gradle / Ivy
/*
* 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.okhttp;
import io.grpc.internal.AbstractReadableBuffer;
import io.grpc.internal.ReadableBuffer;
import java.io.EOFException;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.ByteBuffer;
/**
* A {@link ReadableBuffer} implementation that is backed by an {@link okio.Buffer}.
*/
class OkHttpReadableBuffer extends AbstractReadableBuffer {
private final okio.Buffer buffer;
OkHttpReadableBuffer(okio.Buffer buffer) {
this.buffer = buffer;
}
@Override
public int readableBytes() {
return (int) buffer.size();
}
@Override
public int readUnsignedByte() {
try {
fakeEofExceptionMethod(); // Okio 2.x can throw EOFException from readByte()
return buffer.readByte() & 0x000000FF;
} catch (EOFException e) {
throw new IndexOutOfBoundsException(e.getMessage());
}
}
private void fakeEofExceptionMethod() throws EOFException {}
@Override
public void skipBytes(int length) {
try {
buffer.skip(length);
} catch (EOFException e) {
throw new IndexOutOfBoundsException(e.getMessage());
}
}
@Override
public void readBytes(byte[] dest, int destOffset, int length) {
while (length > 0) {
int bytesRead = buffer.read(dest, destOffset, length);
if (bytesRead == -1) {
throw new IndexOutOfBoundsException("EOF trying to read " + length + " bytes");
}
length -= bytesRead;
destOffset += bytesRead;
}
}
@Override
public void readBytes(ByteBuffer dest) {
// We are not using it.
throw new UnsupportedOperationException();
}
@Override
public void readBytes(OutputStream dest, int length) throws IOException {
buffer.writeTo(dest, length);
}
@Override
public ReadableBuffer readBytes(int length) {
okio.Buffer buf = new okio.Buffer();
buf.write(buffer, length);
return new OkHttpReadableBuffer(buf);
}
@Override
public void close() {
buffer.clear();
}
}