/**
* Tests that the InputStream got from a empty Clob reflects new data in the underlying Clob.
*
* @throws Exception
*/
public void testGetAsciiStreamCreateClob() throws Exception {
// The String that will be used
// to do the inserts into the
// Clob.
String str = "Hi I am the insert String";
// Create the InputStream that will
// be used for comparing the Stream
// that is obtained from the Blob after
// the update.
ByteArrayInputStream str_is = new ByteArrayInputStream(str.getBytes("US-ASCII"));
// create the empty Clob.
Clob clob = getConnection().createClob();
// Get the InputStream from this
// Clob
InputStream is = clob.getAsciiStream();
// set the String into the clob.
clob.setString(1, str);
// Ensure that the Stream obtained from
// the clob contains the expected bytes
assertEquals(str_is, is);
}
/**
* Tests that the data updated in a Clob is always reflected in the InputStream got. Here the
* updates into the Clob are done using both an OutputStream obtained from this Clob as well as
* using Clob.setString.
*
* @throws Exception
*/
public void testGetAsciiStreamClobUpdates() throws Exception {
// The String that will be used
// to do the inserts into the
// Clob.
String str1 = "Hi I am the insert string";
// Stores the byte array representation of
// the insert string.
byte[] str1_bytes = str1.getBytes();
// The String that will be used in the
// second series of updates
String str2 = "Hi I am the update string";
// create the empty Clob.
Clob clob = getConnection().createClob();
// Get the InputStream from this
// Clob before any writes happen.
InputStream is_BeforeWrite = clob.getAsciiStream();
// Get an OutputStream from this Clob
// into which the data can be written
OutputStream os = clob.setAsciiStream(1);
os.write(str1_bytes);
// Doing a setString now on the Clob
// should reflect the same extension
// in the InputStream also.
clob.setString((str1_bytes.length) + 1, str2);
// Get the input stream from the
// Clob after the update
InputStream is_AfterWrite = clob.getAsciiStream();
// Now check if the two InputStreams
// match
assertEquals(is_BeforeWrite, is_AfterWrite);
}
/**
* Tests the implementation for the free() method in the Clob interface.
*
* @throws SQLException if an error occurs during releasing the Clob resources
*/
public void testFreeandMethodsAfterCallingFree()
throws IllegalAccessException, InvocationTargetException, SQLException {
clob = BlobClobTestSetup.getSampleClob(getConnection());
// call the buildHashSetMethod to initialize the
// HashSet with the method signatures that are exempted
// from throwing a SQLException after free has been called
// on the Clob object.
buildHashSet();
InputStream asciiStream = clob.getAsciiStream();
Reader charStream = clob.getCharacterStream();
clob.free();
// testing the idempotence of the free() method
// the method can be called multiple times on
// the first are treated as no-ops
clob.free();
// to the free method so testing calling
// a method on this invalid object should throw
// an SQLException
buildMethodList(clob);
}