Examples of org.hsqldb.lib.CountdownInputStream

org.hsqldb.lib.CountdownInputStream
Counts down from a specified value the number of bytes actually read from the wrapped InputStream.
Returns minus one (-1) early from readXXX methods if the count down reaches zero (0) before the end of the wrapped InputStream is encountered.
This class is especially useful when a fixed number of bytes is to be read from an InputStream that is in turn to be used as the source for an {@link java.io.InputStreamReader InputStreamReader}. @author boucherb@users @version 1.9.0 @since 1.9.0

        String       encoding = (ver < 4) ? "UTF16"
                : "UTF8";
        StringWriter writer   = new StringWriter();


        try {
            CountdownInputStream cis    = new CountdownInputStream(x);
            InputStreamReader    reader = new InputStreamReader(cis, encoding);
            char[]               buff   = new char[1024];
            int                  charsRead;


            cis.setCount(length);


            while (-1 != (charsRead = reader.read(buff))) {
                writer.write(buff, 0, charsRead);
            }
        } catch (IOException ex) {

View Full Code Here

     */
    public void allocateLobForResult(ResultLob result,
                                     InputStream inputStream) {


        long                 resultLobId = result.getLobID();
        CountdownInputStream countStream;


        switch (result.getSubType()) {


            case ResultLob.LobResultTypes.REQUEST_CREATE_BYTES : {
                long blobId;
                long blobLength = result.getBlockLength();


                if (inputStream == null) {
                    blobId      = resultLobId;
                    inputStream = result.getInputStream();
                } else {
                    BlobData blob = session.createBlob(blobLength);


                    blobId = blob.getId();


                    resultLobs.put(resultLobId, blobId);
                }


                countStream = new CountdownInputStream(inputStream);


                countStream.setCount(blobLength);
                database.lobManager.setBytesForNewBlob(
                    blobId, countStream, result.getBlockLength());


                break;
            }
            case ResultLob.LobResultTypes.REQUEST_CREATE_CHARS : {
                long clobId;
                long clobLength = result.getBlockLength();


                if (inputStream == null) {
                    clobId = resultLobId;


                    if (result.getReader() != null) {
                        inputStream =
                            new ReaderInputStream(result.getReader());
                    } else {
                        inputStream = result.getInputStream();
                    }
                } else {
                    ClobData clob = session.createClob(clobLength);


                    clobId = clob.getId();


                    resultLobs.put(resultLobId, clobId);
                }


                countStream = new CountdownInputStream(inputStream);


                countStream.setCount(clobLength * 2);
                database.lobManager.setCharsForNewClob(
                    clobId, countStream, result.getBlockLength());


                break;
            }

View Full Code Here

            if (pos > 0) {
                final long actualPos = fis.skip(pos);
            }


            final BufferedInputStream  bis = new BufferedInputStream(fis);
            final CountdownInputStream cis = new CountdownInputStream(bis);


            cis.setCount(length);


            m_countdownInputStream = cis;
        }

View Full Code Here

        String       encoding = (ver < 4) ? "UTF16"
                : "UTF8";
        StringWriter writer   = new StringWriter();


        try {
            CountdownInputStream cis    = new CountdownInputStream(x);
            InputStreamReader    reader = new InputStreamReader(cis, encoding);
            char[]               buff   = new char[1024];
            int                  charsRead;


            cis.setCount(length);


            while (-1 != (charsRead = reader.read(buff))) {
                writer.write(buff, 0, charsRead);
            }
        } catch (IOException ex) {

View Full Code Here

        String       encoding = (ver < 4) ? "UTF16"
                : "UTF8";
        StringWriter writer   = new StringWriter();


        try {
            CountdownInputStream cis    = new CountdownInputStream(x);
            InputStreamReader    reader = new InputStreamReader(cis, encoding);
            char[]               buff   = new char[1024];
            int                  charsRead;


            cis.setCount(length);


            while (-1 != (charsRead = reader.read(buff))) {
                writer.write(buff, 0, charsRead);
            }
        } catch (IOException ex) {

View Full Code Here

            if (pos > 0) {
                final long actualPos = fis.skip(pos);
            }


            final BufferedInputStream  bis = new BufferedInputStream(fis);
            final CountdownInputStream cis = new CountdownInputStream(bis);


            cis.setCount(length);


            m_countdownInputStream = cis;
        }

View Full Code Here

     */
    public void allocateLobForResult(ResultLob result,
                                     InputStream inputStream) {


        try {
            CountdownInputStream countStream;


            switch (result.getSubType()) {


                case ResultLob.LobResultTypes.REQUEST_CREATE_BYTES : {
                    long blobId;
                    long blobLength = result.getBlockLength();


                    if (blobLength < 0) {


                        // embedded session + unknown lob length
                        allocateBlobSegments(result, result.getInputStream());


                        break;
                    }


                    if (inputStream == null) {


                        // embedded session + known lob length
                        blobId      = result.getLobID();
                        inputStream = result.getInputStream();
                    } else {


                        // server session + known or unknown lob length
                        BlobData blob = session.createBlob(blobLength);


                        blobId = blob.getId();


                        resultLobs.put(result.getLobID(), blobId);
                    }


                    countStream = new CountdownInputStream(inputStream);


                    countStream.setCount(blobLength);
                    database.lobManager.setBytesForNewBlob(
                        blobId, countStream, result.getBlockLength());


                    break;
                }
                case ResultLob.LobResultTypes.REQUEST_CREATE_CHARS : {
                    long clobId;
                    long clobLength = result.getBlockLength();


                    if (clobLength < 0) {


                        // embedded session + unknown lob length
                        allocateClobSegments(result, result.getReader());


                        break;
                    }


                    if (inputStream == null) {
                        clobId = result.getLobID();


                        // embedded session + known lob length
                        if (result.getReader() != null) {
                            inputStream =
                                new ReaderInputStream(result.getReader());
                        } else {
                            inputStream = result.getInputStream();
                        }
                    } else {


                        // server session + known or unknown lob length
                        ClobData clob = session.createClob(clobLength);


                        clobId = clob.getId();


                        resultLobs.put(result.getLobID(), clobId);
                    }


                    countStream = new CountdownInputStream(inputStream);


                    countStream.setCount(clobLength * 2);
                    database.lobManager.setCharsForNewClob(
                        clobId, countStream, result.getBlockLength(), false);


                    break;
                }

View Full Code Here

     */
    public void allocateLobForResult(ResultLob result,
                                     InputStream inputStream) {


        try {
            CountdownInputStream countStream;


            switch (result.getSubType()) {


                case ResultLob.LobResultTypes.REQUEST_CREATE_BYTES : {
                    long blobId;
                    long blobLength = result.getBlockLength();


                    if (blobLength < 0) {


                        // embedded session + unknown lob length
                        allocateBlobSegments(result, result.getInputStream());


                        break;
                    }


                    if (inputStream == null) {


                        // embedded session + known lob length
                        blobId      = result.getLobID();
                        inputStream = result.getInputStream();
                    } else {


                        // server session + known or unknown lob length
                        BlobData blob = session.createBlob(blobLength);


                        blobId = blob.getId();


                        resultLobs.put(result.getLobID(), blobId);
                    }


                    countStream = new CountdownInputStream(inputStream);


                    countStream.setCount(blobLength);
                    database.lobManager.setBytesForNewBlob(
                        blobId, countStream, result.getBlockLength());


                    break;
                }
                case ResultLob.LobResultTypes.REQUEST_CREATE_CHARS : {
                    long clobId;
                    long clobLength = result.getBlockLength();


                    if (clobLength < 0) {


                        // embedded session + unknown lob length
                        allocateClobSegments(result, result.getReader());


                        break;
                    }


                    if (inputStream == null) {
                        clobId = result.getLobID();


                        // embedded session + known lob length
                        if (result.getReader() != null) {
                            inputStream =
                                new ReaderInputStream(result.getReader());
                        } else {
                            inputStream = result.getInputStream();
                        }
                    } else {


                        // server session + known or unknown lob length
                        ClobData clob = session.createClob(clobLength);


                        clobId = clob.getId();


                        resultLobs.put(result.getLobID(), clobId);
                    }


                    countStream = new CountdownInputStream(inputStream);


                    countStream.setCount(clobLength * 2);
                    database.lobManager.setCharsForNewClob(
                        clobId, countStream, result.getBlockLength());


                    break;
                }

View Full Code Here

        String       encoding = (ver < 4) ? "UTF16"
                : "UTF8";
        StringWriter writer   = new StringWriter();


        try {
            CountdownInputStream cis    = new CountdownInputStream(x);
            InputStreamReader    reader = new InputStreamReader(cis, encoding);
            char[]               buff   = new char[1024];
            int                  charsRead;


            cis.setCount(length);


            while (-1 != (charsRead = reader.read(buff))) {
                writer.write(buff, 0, charsRead);
            }
        } catch (IOException ex) {

View Full Code Here

     */
    public void allocateLobForResult(ResultLob result,
                                     InputStream inputStream) {


        long                 resultLobId = result.getLobID();
        CountdownInputStream countStream;


        switch (result.getSubType()) {


            case ResultLob.LobResultTypes.REQUEST_CREATE_BYTES : {
                long blobId;
                long blobLength = result.getBlockLength();


                if (inputStream == null) {
                    blobId      = resultLobId;
                    inputStream = result.getInputStream();
                } else {
                    BlobData blob = session.createBlob(blobLength);


                    blobId = blob.getId();


                    resultLobs.put(resultLobId, blobId);
                }


                countStream = new CountdownInputStream(inputStream);


                countStream.setCount(blobLength);
                database.lobManager.setBytesForNewBlob(
                    blobId, countStream, result.getBlockLength());


                break;
            }
            case ResultLob.LobResultTypes.REQUEST_CREATE_CHARS : {
                long clobId;
                long clobLength = result.getBlockLength();


                if (inputStream == null) {
                    clobId = resultLobId;


                    if (result.getReader() != null) {
                        inputStream =
                            new ReaderInputStream(result.getReader());
                    } else {
                        inputStream = result.getInputStream();
                    }
                } else {
                    ClobData clob = session.createClob(clobLength);


                    clobId = clob.getId();


                    resultLobs.put(resultLobId, clobId);
                }


                countStream = new CountdownInputStream(inputStream);


                countStream.setCount(clobLength * 2);
                database.lobManager.setCharsForNewClob(
                    clobId, countStream, result.getBlockLength());


                break;
            }

View Full Code Here

TOP

Related Classes of org.hsqldb.lib.CountdownInputStream

org.hsqldb.jdbc.JDBCBlobFile$InputStreamAdapter

org.hsqldb.jdbc.JDBCPreparedStatement

org.hsqldb.SessionData

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.