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SDK for Microsoft Azure Storage Clients
/**
* Copyright Microsoft Corporation
*
* 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.microsoft.azure.storage.core;
import java.io.IOException;
import java.io.InputStream;
/**
* RESERVED FOR INTERNAL USE.
*/
public class NetworkInputStream extends InputStream {
private final long expectedLength;
private final InputStream inputStream;
private long bytesRead = 0;
/**
* Creates a NetworkInputStream and saves its arguments, the input stream and expected length, for later use.
*
* @param stream
* @param expectedLength
*/
public NetworkInputStream(InputStream stream, long expectedLength) {
this.inputStream = stream;
this.expectedLength = expectedLength;
}
@Override
public int read() throws IOException {
throw new UnsupportedOperationException();
}
@Override
public int read(byte[] b, int off, int len) throws IOException {
int count = this.inputStream.read(b, off, len);
if (count > -1) {
this.bytesRead += count;
}
else {
if (this.bytesRead != this.expectedLength) {
throw new IOException(SR.CONTENT_LENGTH_MISMATCH);
}
}
return count;
}
@Override
public void close() throws IOException {
this.inputStream.close();
}
}