com.google.enterprise.adaptor
Class IOHelper

java.lang.Object
  com.google.enterprise.adaptor.IOHelper

public class IOHelper
extends Object

Utility class for providing useful methods when handling streams or other forms of I/O.

copyStream

public static void copyStream(InputStream in,
                              OutputStream out)
                       throws IOException

Copy contents of in to out.

Throws:

IOException

readInputStreamToByteArray

public static byte[] readInputStreamToByteArray(InputStream is)
                                         throws IOException

Read the contents of is into a byte array.

Throws:

IOException

readInputStreamToString

public static String readInputStreamToString(InputStream is,
                                             Charset charset)
                                      throws IOException

Form a string from the contents of is with charset charset.

Throws:

IOException

writeToTempFile

public static File writeToTempFile(InputStream in)
                            throws IOException

Write contents of in to a temporary file. Caller is responsible for deleting the temporary file after use.

Throws:

IOException

writeToTempFile

public static File writeToTempFile(String string,
                                   Charset charset)
                            throws IOException

Write contents of string to a temporary file, encoded using charset. Caller is responsible for deleting the temporary file after use.

Throws:

IOException

readFully

public static int readFully(InputStream is,
                            byte[] bytes,
                            int off,
                            int len)
                     throws IOException

Reads a specified number of bytes from a stream. Fewer bytes will only be returned if the end of stream has been reached.

Parameters:

is - the stream from which the bytes will be read.

bytes - the buffer into which the data is read.

off - the start offset in array b at which the data is written.

len - the number of bytes to read unless end of stream is encountered

Returns:

the total number of bytes read into the buffer, or -1 if there is no more data because the end of the stream has been reached.

Throws:

IOException - If the first byte cannot be read for any reason other than reaching end-of-stream, or if the input stream has been closed, or if some other I/O error occurs.

NullPointerException - If b is null.

IndexOutOfBoundsException - If off is negative, len is negative, or len is greater than b.length - off