org.kuali.maven.wagon.TransferProgressFileInputStream Maven / Gradle / Ivy

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* forked from net.adamcin.org.kuali.maven.wagons:maven-s3-wagon This project is an implementation of a multi-threaded Wagon provider for accessing Amazon's Simple Storage Service (S3). It enables Maven to download files from and deploy files to S3. It draws heavily from code developed by Ben Hale at SpringSource

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/**
 * Copyright 2010-2015 The Kuali Foundation
 *
 * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
 *
 * 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 org.kuali.maven.wagon;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

import com.amazonaws.services.s3.internal.RepeatableFileInputStream;

/**
 * An extension to the {@link FileInputStream} that notifies a @{link TransferProgress} object as it is being read from
 *
 * @author Ben Hale
 * @since 1.1
 */
public class TransferProgressFileInputStream extends RepeatableFileInputStream {

    private TransferProgress progress;

    public TransferProgressFileInputStream(File file, TransferProgress progress) throws FileNotFoundException {
        super(file);
        this.progress = progress;
    }

    @Override
    public int read() throws IOException {
        int b = super.read();
        if (b != -1) {
            progress.notify(new byte[] { (byte) b }, 1);
        }
        return b;
    }

    @Override
    public int read(byte b[]) throws IOException {
        int length = super.read(b);
        if (length != -1) {
            progress.notify(b, length);
        }
        return length;
    }

    @Override
    public int read(byte b[], int off, int len) throws IOException {
        int count = super.read(b, off, len);
        if (count == -1) {
            return count;
        }
        if (off == 0) {
            progress.notify(b, count);
        } else {
            byte[] bytes = new byte[len];
            System.arraycopy(b, off, bytes, 0, count);
            progress.notify(bytes, count);
        }
        return count;
    }
}