/**
* This method creates a rpm data type out of a input stream and an
* IndexEntry. The object must at the current position of the input stream.
* The length is only needed for string objects; the string objects will
* read length bytes of the input stream and will try to convert the data
* into a rpm data type.
*
* @param inputStream
* The input stream
* @param indexEntry
* The IndexEntry that should be read
* @param length
* The number of bytes to read for string objects
*
* @return One of the rpm data types coresponding with the type contained in
* the IndexEntry.
*
* @throws IOException
* if something was wrong during reading of the input stream
*/
public static DataTypeIf createFromStream(
java.io.DataInputStream inputStream, IndexEntry indexEntry,
long length)
{//throws IOException {
DataTypeIf ret = null;
switch ((int)indexEntry.getType().getId())
{
case RPMIndexType._NULL:
ret = NULL.readFromStream(indexEntry);
break;
case RPMIndexType._CHAR:
ret = CHAR.readFromStream(inputStream, indexEntry);
break;
case RPMIndexType._INT8:
ret = INT8.readFromStream(inputStream, indexEntry);
break;
case RPMIndexType._INT16:
ret = INT16.readFromStream(inputStream, indexEntry);
break;
case RPMIndexType._INT32:
ret = INT32.readFromStream(inputStream, indexEntry);
break;
case RPMIndexType._INT64:
ret = INT64.readFromStream(inputStream, indexEntry);
break;
case RPMIndexType._STRING:
ret = STRING.readFromStream(inputStream, indexEntry, length);
break;
case RPMIndexType._BIN:
ret = BIN.readFromStream(inputStream, indexEntry);
break;
case RPMIndexType._STRING_ARRAY:
ret = STRING_ARRAY.readFromStream(inputStream, indexEntry, length);
break;
case RPMIndexType._I18NSTRING:
ret = I18NSTRING.readFromStream(inputStream, indexEntry, length);
break;
default:
// TODO: UNKNOWN
break;
}
return(ret);
}
/**
* Constructs a type froma stream
*
* @param inputStream An input stream
* @param indexEntry The index informations
* @param length the length of the data
* @return The size of the read data
* @throws IOException if an I/O error occurs.
*/
public static STRING_ARRAY readFromStream(
java.io.DataInputStream inputStream, IndexEntry indexEntry,
long length)
{// throws IOException {
if (indexEntry.getType() != RPMIndexType.STRING_ARRAY)
{
throw new java.lang.IllegalArgumentException("Type <" + indexEntry.getType()
+ "> does not match <" + RPMIndexType.STRING_ARRAY + ">");
}
// initialize temporary space for data
byte[] stringData = new byte[(int)length];
// and read it from stream
inputStream.readFully(stringData);
String[] data = new String[(int)indexEntry.getCount()];
int off = 0;
for (int pos = 0; pos < indexEntry.getCount(); pos++)
{
data[pos] = RPMUtil.cArrayToString(stringData, off);
// add 1 for \0 in C strings
off += (data[pos].length() + 1);
// throw an exception if we have read out of the data space
if (off > stringData.Length)
{
throw new java.lang.IllegalStateException(
"Index wrong; Strings doesn't fit into data area. ["
+ off + ", " + stringData.Length + "]");
}
}
STRING_ARRAY stringObject = new STRING_ARRAY(data);
if (logger.isLoggable(java.util.logging.Level.FINER))
{
logger.finer(stringObject.toString());
if (stringObject.size != stringData.Length)
{
logger.warning("STRING_ARRAY size differs (is:" + stringData.Length
+ ";should:" + stringObject.size + ")");
}
}
stringObject.size = stringData.Length;
return(stringObject);
}