/** @return <code>null</code> if <tt>offset</tt> points to the end of the document stream */
DataInputBlock getDataInputBlock(int offset) {
if (offset >= _size) {
if (offset > _size) {
throw new RuntimeException("Request for Offset " + offset + " doc size is " + _size);
}
return null;
}
if (_property.shouldUseSmallBlocks()) {
return SmallDocumentBlock.getDataInputBlock(_small_store.getBlocks(), offset);
}
return DocumentBlock.getDataInputBlock(_big_store.getBlocks(), offset);
}
/**
* Get an array of objects, some of which may implement POIFSViewable
*
* @return an array of Object; may not be null, but may be empty
*/
public Object[] getViewableArray() {
String result = "<NO DATA>";
try {
BlockWritable[] blocks = null;
if (_big_store.isValid()) {
blocks = _big_store.getBlocks();
} else if (_small_store.isValid()) {
blocks = _small_store.getBlocks();
}
if (blocks != null) {
ByteArrayOutputStream output = new ByteArrayOutputStream();
for (BlockWritable bw : blocks) {
bw.writeBlocks(output);
}
int length = Math.min(output.size(), _property.getSize());
result = HexDump.dump(output.toByteArray(), 0, 0, length);
}
} catch (IOException e) {
result = e.getMessage();
}
return new String[] {result};
}
/**
* Return the number of BigBlock's this instance uses
*
* @return count of BigBlock instances
*/
public int countBlocks() {
return _big_store.countBlocks();
}
/**
* Write the storage to an OutputStream
*
* @param stream the OutputStream to which the stored data should be written
*/
public void writeBlocks(OutputStream stream) throws IOException {
_big_store.writeBlocks(stream);
}