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ProgressStream.java
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106 lines (92 loc) · 3.06 KB
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/*
* MinIO Java SDK for Amazon S3 Compatible Cloud Storage, (C) 2017 MinIO, 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
*
* https://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.
*/
import java.io.IOException;
import java.io.InputStream;
import me.tongfei.progressbar.ProgressBar;
import me.tongfei.progressbar.ProgressBarStyle;
public class ProgressStream extends InputStream {
private InputStream in;
private ProgressBar pb;
/**
* ProgressStream implements an extends InputStream while also writing out the read progress on
* console. ProgressStream can be used as a direct replacement for any InputStream compatible
* input.
*
* @param msg Custom message string.
* @param style Custom progress bar style.
* @param stream InputStream to be wrapped.
* @throws IOException For any exception generated by the InputStream.
*/
public ProgressStream(String msg, ProgressBarStyle style, InputStream stream) throws IOException {
this(msg, style, (long)stream.available(), stream);
}
/**
* ProgressStream implements an extends InputStream while also writing out the read progress on
* console. ProgressStream can be used as a direct replacement for any InputStream compatible
* input.
*
* @param msg Custom message string.
* @param style Custom progress bar style.
* @param size Size of the progress bar.
* @param stream InputStream to be wrapped.
* @throws IOException For any exception generated by the InputStream.
*/
public ProgressStream(String msg, ProgressBarStyle style, long size, InputStream stream)
throws IOException {
super();
// Allocate the reader.
this.in = stream;
// Initialize progress bar.
this.pb = new ProgressBar(msg, size, style);
this.pb.start();
}
@Override
public int available() throws IOException {
return this.in.available();
}
@Override
public void close() throws IOException {
this.pb.stop();
this.in.close();
return;
}
@Override
public int read() throws IOException {
this.pb.step();
return this.in.read();
}
@Override
public int read(byte[] toStore) throws IOException {
int readBytes = this.in.read(toStore);
this.pb.stepBy(readBytes); // Update progress bar.
return readBytes;
}
@Override
public int read(byte[] toStore, int off, int len) throws IOException {
int readBytes = this.in.read(toStore, off, len);
this.pb.stepBy(readBytes);
return readBytes;
}
@Override
public long skip(long n) throws IOException {
this.pb.stepTo(n);
return this.in.skip(n);
}
@Override
public boolean markSupported() {
return false;
}
}