/**
* Returns a <code>Reader</code> object that contains a partial <code>Clob</code> value, starting
* with the character specified by pos, which is length characters in length.
*
* @param pos the offset to the first character of the partial value to be retrieved. The first
* character in the Clob is at position 1.
* @param length the length in characters of the partial value to be retrieved.
* @return <code>Reader</code> through which the partial <code>Clob</code> value can be read.
* @throws SQLException if pos is less than 1 or if pos is greater than the number of characters
* in the <code>Clob</code> or if pos + length is greater than the number of characters in the
* <code>Clob</code>
*/
public Reader getCharacterStream(long pos, long length) throws SQLException // @sync
{
if (locator_ == null) // @free
JDError.throwSQLException(this, JDError.EXC_FUNCTION_SEQUENCE); // @free
synchronized (locator_) // @sync
{
if (pos < 1
|| (pos - 1 + length) > locator_.getMaxLength()
|| length < 0) // @pdc change parm check like getSubString
{
JDError.throwSQLException(this, JDError.EXC_ATTRIBUTE_VALUE_INVALID);
}
Reader r = null;
try {
// @xml3 if xml column, remove xml declaration via ConvTableReader
r =
new ConvTableReader(
new AS400JDBCInputStream(locator_),
converter_.getCcsid(),
converter_.bidiStringType_,
isXML_); // @xml3
r.skip(pos);
return r;
} catch (UnsupportedEncodingException e) {
JDError.throwSQLException(this, JDError.EXC_INTERNAL, e);
return null;
} catch (IOException e) {
JDError.throwSQLException(this, JDError.EXC_INTERNAL, e);
return null;
}
}
}
/**
* Constructs an AS400JDBCClobLocator object. The data for the CLOB will be retrieved as
* requested, directly from the IBM i system, using the locator handle.
*
* @param locator The locator.
* @param converter The text converter.
*/
AS400JDBCClobLocator(
JDLobLocator locator, ConvTable converter, Object savedObject, int savedScale) {
locator_ = locator;
converter_ = converter;
savedObject_ = savedObject;
savedScale_ = savedScale;
maxLength_ = locator_.getMaxLength();
}
public String getString() throws SQLException {
if (savedObject_ != null) // @loch
{ // @loch
// get value from RS.updateX(value)
doConversion(); // @loch
truncated_ = 0; // @loch
return value_; // @loch
} // @loch
DBLobData data = locator_.retrieveData(0, locator_.getMaxLength());
String value =
converter_.byteArrayToString(data.getRawBytes(), data.getOffset(), data.getLength());
truncated_ = 0; // @pda make consistent with other SQLData Clob classes
return value;
}
// @pda jdbc40
public String getNString() throws SQLException {
truncated_ = 0;
outOfBounds_ = false;
if (savedObject_ != null) // @loch
{ // @loch
// get value from RS.updateX(value)
doConversion(); // @loch
truncated_ = 0;
outOfBounds_ = false; // @loch
return value_; // @loch
} // @loch
DBLobData data = locator_.retrieveData(0, locator_.getMaxLength());
String value =
converter_.byteArrayToString(data.getRawBytes(), data.getOffset(), data.getLength());
return value;
}
