TemporaryClob.java 文件源码

/**
 * @see #getReader
 */
public Reader getInternalReader(long characterPosition)
        throws IOException, SQLException {
    if (this.internalReader == null) {
        // getCSD obtains a descriptor for the stream to allow the reader
        // to configure itself.
        this.internalReader = new UTF8Reader(getCSD(), conChild,
                conChild.getConnectionSynchronization());
        this.unclosableInternalReader =
                new FilterReader(this.internalReader) {
                    public void close() {
                        // Do nothing.
                        // Stream will be closed when the Clob is released.
                    }
                };
    }
    try {
        this.internalReader.reposition(characterPosition);
    } catch (StandardException se) {
        throw Util.generateCsSQLException(se);
    }
    return this.unclosableInternalReader;
}