// StreamUtil.java

/**

* Copyright (C) 2008 10gen 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

*

* 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.mongodb.io;

import java.io.ByteArrayOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

public class StreamUtil {

public static byte[] readBytesFully( InputStream is )

throws IOException {

ByteArrayOutputStream baos = new ByteArrayOutputStream();

pipe( is , baos );

return baos.toByteArray();

}

public static int pipe( InputStream is , OutputStream out )

throws IOException {

return pipe( is , out , -1 );

}

public static int pipe( InputStream is , OutputStream out , int maxSize )

throws IOException {

byte buf[] = new byte [4096];

int len;

int total = 0;

while ((len = is.read(buf)) != -1){

out.write(buf, 0, len);

total += len;

if ( maxSize > 0 && total > maxSize )

throw new IOException("too big");

}

return total;

}

}