/*

  * Copyright 2004-2007 the original author or 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 org.kuali.maven.wagon;

 import java.io.File;

 import java.io.FileInputStream;

 import java.io.FileNotFoundException;

 import java.io.IOException;

 /**

  * 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 FileInputStream {

         private TransferProgress progress;

         public TransferProgressFileInputStream(File file, TransferProgress progress) throws FileNotFoundException {

                 super(file);

                 this.progress = progress;

         }

         public int read() throws IOException {

                 int b = super.read();

                 if (b != -1) {

                         progress.notify(new byte[] { (byte) b }, 1);

                 }

                 return b;

         }

         public int read(byte b[]) throws IOException {

                 int length = super.read(b);

                 if (length != -1) {

                         progress.notify(b, length);

                 }

                 return length;

         }

         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;

         }

 }