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src/java.sql/share/classes/java/sql/Blob.java

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  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package java.sql;
  27 
  28 import java.io.InputStream;
  29 
  30 /**
  31  * The representation (mapping) in
  32  * the Java&trade; programming
  33  * language of an SQL
  34  * <code>BLOB</code> value.  An SQL <code>BLOB</code> is a built-in type
  35  * that stores a Binary Large Object as a column value in a row of
  36  * a database table. By default drivers implement <code>Blob</code> using
  37  * an SQL <code>locator(BLOB)</code>, which means that a
  38  * <code>Blob</code> object contains a logical pointer to the
  39  * SQL <code>BLOB</code> data rather than the data itself.
  40  * A <code>Blob</code> object is valid for the duration of the
  41  * transaction in which is was created.
  42  *
  43  * <P>Methods in the interfaces {@link ResultSet},
  44  * {@link CallableStatement}, and {@link PreparedStatement}, such as
  45  * <code>getBlob</code> and <code>setBlob</code> allow a programmer to
  46  * access an SQL <code>BLOB</code> value.
  47  * The <code>Blob</code> interface provides methods for getting the
  48  * length of an SQL <code>BLOB</code> (Binary Large Object) value,
  49  * for materializing a <code>BLOB</code> value on the client, and for
  50  * determining the position of a pattern of bytes within a
  51  * <code>BLOB</code> value. In addition, this interface has methods for updating
  52  * a <code>BLOB</code> value.
  53  * <p>
  54  * All methods on the <code>Blob</code> interface must be fully implemented if the
  55  * JDBC driver supports the data type.
  56  *
  57  * @since 1.2
  58  */
  59 
  60 public interface Blob {
  61 
  62   /**
  63    * Returns the number of bytes in the <code>BLOB</code> value
  64    * designated by this <code>Blob</code> object.
  65    * @return length of the <code>BLOB</code> in bytes

  66    * @exception SQLException if there is an error accessing the
  67    * length of the <code>BLOB</code>
  68    * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
  69    * this method
  70    * @since 1.2
  71    */
  72   long length() throws SQLException;
  73 
  74   /**
  75    * Retrieves all or part of the <code>BLOB</code>
  76    * value that this <code>Blob</code> object represents, as an array of
  77    * bytes.  This <code>byte</code> array contains up to <code>length</code>
  78    * consecutive bytes starting at position <code>pos</code>.
  79    *
  80    * @param pos the ordinal position of the first byte in the
  81    *        <code>BLOB</code> value to be extracted; the first byte is at
  82    *        position 1
  83    * @param length the number of consecutive bytes to be copied; the value
  84    * for length must be 0 or greater
  85    * @return a byte array containing up to <code>length</code>
  86    *         consecutive bytes from the <code>BLOB</code> value designated
  87    *         by this <code>Blob</code> object, starting with the
  88    *         byte at position <code>pos</code>
  89    * @exception SQLException if there is an error accessing the
  90    *            <code>BLOB</code> value; if pos is less than 1 or length is
  91    * less than 0
  92    * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
  93    * this method
  94    * @see #setBytes
  95    * @since 1.2
  96    */
  97   byte[] getBytes(long pos, int length) throws SQLException;
  98 
  99   /**
 100    * Retrieves the <code>BLOB</code> value designated by this
 101    * <code>Blob</code> instance as a stream.
 102    *
 103    * @return a stream containing the <code>BLOB</code> data
 104    * @exception SQLException if there is an error accessing the
 105    *            <code>BLOB</code> value
 106    * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
 107    * this method
 108    * @see #setBinaryStream
 109    * @since 1.2
 110    */
 111   java.io.InputStream getBinaryStream () throws SQLException;
 112 
 113   /**
 114    * Retrieves the byte position at which the specified byte array
 115    * <code>pattern</code> begins within the <code>BLOB</code>
 116    * value that this <code>Blob</code> object represents.  The
 117    * search for <code>pattern</code> begins at position
 118    * <code>start</code>.
 119    *
 120    * @param pattern the byte array for which to search
 121    * @param start the position at which to begin searching; the
 122    *        first position is 1
 123    * @return the position at which the pattern appears, else -1
 124    * @exception SQLException if there is an error accessing the
 125    * <code>BLOB</code> or if start is less than 1
 126    * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
 127    * this method
 128    * @since 1.2
 129    */
 130   long position(byte pattern[], long start) throws SQLException;
 131 
 132   /**
 133    * Retrieves the byte position in the <code>BLOB</code> value
 134    * designated by this <code>Blob</code> object at which
 135    * <code>pattern</code> begins.  The search begins at position
 136    * <code>start</code>.
 137    *
 138    * @param pattern the <code>Blob</code> object designating
 139    * the <code>BLOB</code> value for which to search
 140    * @param start the position in the <code>BLOB</code> value
 141    *        at which to begin searching; the first position is 1
 142    * @return the position at which the pattern begins, else -1
 143    * @exception SQLException if there is an error accessing the
 144    *            <code>BLOB</code> value or if start is less than 1
 145    * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
 146    * this method
 147    * @since 1.2
 148    */
 149   long position(Blob pattern, long start) throws SQLException;
 150 
 151     // -------------------------- JDBC 3.0 -----------------------------------
 152 
 153     /**
 154      * Writes the given array of bytes to the <code>BLOB</code> value that
 155      * this <code>Blob</code> object represents, starting at position
 156      * <code>pos</code>, and returns the number of bytes written.
 157      * The array of bytes will overwrite the existing bytes
 158      * in the <code>Blob</code> object starting at the position
 159      * <code>pos</code>.  If the end of the <code>Blob</code> value is reached
 160      * while writing the array of bytes, then the length of the <code>Blob</code>
 161      * value will be increased to accommodate the extra bytes.
 162      * <p>
 163      * <b>Note:</b> If the value specified for <code>pos</code>
 164      * is greater then the length+1 of the <code>BLOB</code> value then the
 165      * behavior is undefined. Some JDBC drivers may throw a
 166      * <code>SQLException</code> while other drivers may support this
 167      * operation.
 168      *
 169      * @param pos the position in the <code>BLOB</code> object at which
 170      *        to start writing; the first position is 1
 171      * @param bytes the array of bytes to be written to the <code>BLOB</code>
 172      *        value that this <code>Blob</code> object represents
 173      * @return the number of bytes written
 174      * @exception SQLException if there is an error accessing the
 175      *            <code>BLOB</code> value or if pos is less than 1
 176      * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
 177      * this method
 178      * @see #getBytes
 179      * @since 1.4
 180      */
 181     int setBytes(long pos, byte[] bytes) throws SQLException;
 182 
 183     /**
 184      * Writes all or part of the given <code>byte</code> array to the
 185      * <code>BLOB</code> value that this <code>Blob</code> object represents
 186      * and returns the number of bytes written.
 187      * Writing starts at position <code>pos</code> in the <code>BLOB</code>
 188      * value; <code>len</code> bytes from the given byte array are written.
 189      * The array of bytes will overwrite the existing bytes
 190      * in the <code>Blob</code> object starting at the position
 191      * <code>pos</code>.  If the end of the <code>Blob</code> value is reached
 192      * while writing the array of bytes, then the length of the <code>Blob</code>
 193      * value will be increased to accommodate the extra bytes.
 194      * <p>
 195      * <b>Note:</b> If the value specified for <code>pos</code>
 196      * is greater then the length+1 of the <code>BLOB</code> value then the
 197      * behavior is undefined. Some JDBC drivers may throw a
 198      * <code>SQLException</code> while other drivers may support this
 199      * operation.
 200      *
 201      * @param pos the position in the <code>BLOB</code> object at which
 202      *        to start writing; the first position is 1
 203      * @param bytes the array of bytes to be written to this <code>BLOB</code>
 204      *        object
 205      * @param offset the offset into the array <code>bytes</code> at which
 206      *        to start reading the bytes to be set
 207      * @param len the number of bytes to be written to the <code>BLOB</code>
 208      *        value from the array of bytes <code>bytes</code>
 209      * @return the number of bytes written
 210      * @exception SQLException if there is an error accessing the
 211      *            <code>BLOB</code> value or if pos is less than 1
 212      * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
 213      * this method
 214      * @see #getBytes
 215      * @since 1.4
 216      */
 217     int setBytes(long pos, byte[] bytes, int offset, int len) throws SQLException;
 218 
 219     /**
 220      * Retrieves a stream that can be used to write to the <code>BLOB</code>
 221      * value that this <code>Blob</code> object represents.  The stream begins
 222      * at position <code>pos</code>.
 223      * The  bytes written to the stream will overwrite the existing bytes
 224      * in the <code>Blob</code> object starting at the position
 225      * <code>pos</code>.  If the end of the <code>Blob</code> value is reached
 226      * while writing to the stream, then the length of the <code>Blob</code>
 227      * value will be increased to accommodate the extra bytes.
 228      * <p>
 229      * <b>Note:</b> If the value specified for <code>pos</code>
 230      * is greater then the length+1 of the <code>BLOB</code> value then the
 231      * behavior is undefined. Some JDBC drivers may throw a
 232      * <code>SQLException</code> while other drivers may support this
 233      * operation.
 234      *
 235      * @param pos the position in the <code>BLOB</code> value at which
 236      *        to start writing; the first position is 1
 237      * @return a <code>java.io.OutputStream</code> object to which data can
 238      *         be written
 239      * @exception SQLException if there is an error accessing the
 240      *            <code>BLOB</code> value or if pos is less than 1
 241      * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
 242      * this method
 243      * @see #getBinaryStream
 244      * @since 1.4
 245      */
 246     java.io.OutputStream setBinaryStream(long pos) throws SQLException;
 247 
 248     /**
 249      * Truncates the <code>BLOB</code> value that this <code>Blob</code>
 250      * object represents to be <code>len</code> bytes in length.
 251      * <p>
 252      * <b>Note:</b> If the value specified for <code>pos</code>
 253      * is greater then the length+1 of the <code>BLOB</code> value then the
 254      * behavior is undefined. Some JDBC drivers may throw a
 255      * <code>SQLException</code> while other drivers may support this
 256      * operation.
 257      *
 258      * @param len the length, in bytes, to which the <code>BLOB</code> value
 259      *        that this <code>Blob</code> object represents should be truncated
 260      * @exception SQLException if there is an error accessing the
 261      *            <code>BLOB</code> value or if len is less than 0
 262      * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
 263      * this method
 264      * @since 1.4
 265      */
 266     void truncate(long len) throws SQLException;
 267 
 268     /**
 269      * This method frees the <code>Blob</code> object and releases the resources that
 270      * it holds. The object is invalid once the <code>free</code>
 271      * method is called.
 272      * <p>
 273      * After <code>free</code> has been called, any attempt to invoke a
 274      * method other than <code>free</code> will result in a <code>SQLException</code>
 275      * being thrown.  If <code>free</code> is called multiple times, the subsequent
 276      * calls to <code>free</code> are treated as a no-op.
 277      *
 278      * @throws SQLException if an error occurs releasing
 279      * the Blob's resources
 280      * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
 281      * this method
 282      * @since 1.6
 283      */
 284     void free() throws SQLException;
 285 
 286     /**
 287      * Returns an <code>InputStream</code> object that contains a partial <code>Blob</code> value,
 288      * starting  with the byte specified by pos, which is length bytes in length.

 289      *
 290      * @param pos the offset to the first byte of the partial value to be retrieved.
 291      *  The first byte in the <code>Blob</code> is at position 1
 292      * @param length the length in bytes of the partial value to be retrieved
 293      * @return <code>InputStream</code> through which the partial <code>Blob</code> value can be read.
 294      * @throws SQLException if pos is less than 1 or if pos is greater than the number of bytes
 295      * in the <code>Blob</code> or if pos + length is greater than the number of bytes
 296      * in the <code>Blob</code>


 297      *
 298      * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
 299      * this method
 300      * @since 1.6
 301      */
 302     InputStream getBinaryStream(long pos, long length) throws SQLException;
 303 }



  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package java.sql;
  27 
  28 import java.io.InputStream;
  29 
  30 /**
  31  * The representation (mapping) in
  32  * the Java&trade; programming language of an SQL
  33  * {@code BLOB} value.  An SQL {@code BLOB} is a built-in type

  34  * that stores a Binary Large Object as a column value in a row of
  35  * a database table. By default drivers implement {@code Blob} using
  36  * an SQL {@code locator(BLOB)}, which means that a
  37  * {@code Blob} object contains a logical pointer to the
  38  * SQL {@code BLOB} data rather than the data itself.
  39  * A {@code Blob} object is valid for the duration of the
  40  * transaction in which is was created.
  41  *
  42  * <P>Methods in the interfaces {@link ResultSet},
  43  * {@link CallableStatement}, and {@link PreparedStatement}, such as
  44  * {@code getBlob} and {@code setBlob} allow a programmer to
  45  * access an SQL {@code BLOB} value.
  46  * The {@code Blob} interface provides methods for getting the
  47  * length of an SQL {@code BLOB} (Binary Large Object) value,
  48  * for materializing a {@code BLOB} value on the client, and for
  49  * determining the position of a pattern of bytes within a
  50  * {@code BLOB} value. In addition, this interface has methods for updating
  51  * a {@code BLOB} value.
  52  * <p>
  53  * All methods on the {@code Blob} interface must be fully implemented if the
  54  * JDBC driver supports the data type.
  55  *
  56  * @since 1.2
  57  */
  58 
  59 public interface Blob {
  60 
  61   /**
  62    * Returns the number of bytes in the {@code BLOB} value
  63    * designated by this {@code Blob} object.
  64    *
  65    * @return length of the {@code BLOB} in bytes
  66    * @exception SQLException if there is an error accessing the
  67    *            length of the {@code BLOB}
  68    * @exception SQLFeatureNotSupportedException if the JDBC driver
  69    *            does not support this method
  70    * @since 1.2
  71    */
  72   long length() throws SQLException;
  73 
  74   /**
  75    * Retrieves all or part of the {@code BLOB}
  76    * value that this {@code Blob} object represents, as an array of
  77    * bytes.  This {@code byte} array contains up to {@code length}
  78    * consecutive bytes starting at position {@code pos}.
  79    *
  80    * @param pos the ordinal position of the first byte in the
  81    *        {@code BLOB} value to be extracted; the first byte is at
  82    *        position 1
  83    * @param length the number of consecutive bytes to be copied; the value
  84    *        for length must be 0 or greater
  85    * @return a byte array containing up to {@code length}
  86    *         consecutive bytes from the {@code BLOB} value designated
  87    *         by this {@code Blob} object, starting with the
  88    *         byte at position {@code pos}
  89    * @exception SQLException if there is an error accessing the
  90    *            {@code BLOB} value; if pos is less than 1 or length is
  91    *            less than 0
  92    * @exception SQLFeatureNotSupportedException if the JDBC driver
  93    *            does not support this method
  94    * @see #setBytes
  95    * @since 1.2
  96    */
  97   byte[] getBytes(long pos, int length) throws SQLException;
  98 
  99   /**
 100    * Retrieves the {@code BLOB} value designated by this
 101    * {@code Blob} instance as a stream.
 102    *
 103    * @return a stream containing the {@code BLOB} data
 104    * @exception SQLException if there is an error accessing the
 105    *            {@code BLOB} value
 106    * @exception SQLFeatureNotSupportedException if the JDBC driver
 107    *            does not support this method
 108    * @see #setBinaryStream
 109    * @since 1.2
 110    */
 111   java.io.InputStream getBinaryStream () throws SQLException;
 112 
 113   /**
 114    * Retrieves the byte position at which the specified byte array
 115    * {@code pattern} begins within the {@code BLOB}
 116    * value that this {@code Blob} object represents.
 117    * The search for {@code pattern} begins at position
 118    * {@code start}.
 119    *
 120    * @param pattern the byte array for which to search
 121    * @param start the position at which to begin searching; the
 122    *        first position is 1
 123    * @return the position at which the pattern appears, else -1
 124    * @exception SQLException if there is an error accessing the
 125    *            {@code BLOB} or if start is less than 1
 126    * @exception SQLFeatureNotSupportedException if the JDBC driver
 127    *            does not support this method
 128    * @since 1.2
 129    */
 130   long position(byte pattern[], long start) throws SQLException;
 131 
 132   /**
 133    * Retrieves the byte position in the {@code BLOB} value
 134    * designated by this {@code Blob} object at which
 135    * {@code pattern} begins.  The search begins at position
 136    * {@code start}.
 137    *
 138    * @param pattern the {@code Blob} object designating
 139    *        the {@code BLOB} value for which to search
 140    * @param start the position in the {@code BLOB} value
 141    *        at which to begin searching; the first position is 1
 142    * @return the position at which the pattern begins, else -1
 143    * @exception SQLException if there is an error accessing the
 144    *            {@code BLOB} value or if start is less than 1
 145    * @exception SQLFeatureNotSupportedException if the JDBC driver
 146    *            does not support this method
 147    * @since 1.2
 148    */
 149   long position(Blob pattern, long start) throws SQLException;
 150 
 151     // -------------------------- JDBC 3.0 -----------------------------------
 152 
 153     /**
 154      * Writes the given array of bytes to the {@code BLOB} value that
 155      * this {@code Blob} object represents, starting at position
 156      * {@code pos}, and returns the number of bytes written.
 157      * The array of bytes will overwrite the existing bytes
 158      * in the {@code Blob} object starting at the position
 159      * {@code pos}.  If the end of the {@code Blob} value is reached
 160      * while writing the array of bytes, then the length of the {@code Blob}
 161      * value will be increased to accommodate the extra bytes.
 162      * <p>
 163      * <b>Note:</b> If the value specified for {@code pos}
 164      * is greater than the length+1 of the {@code BLOB} value then the
 165      * behavior is undefined. Some JDBC drivers may throw an
 166      * {@code SQLException} while other drivers may support this
 167      * operation.
 168      *
 169      * @param pos the position in the {@code BLOB} object at which
 170      *        to start writing; the first position is 1
 171      * @param bytes the array of bytes to be written to the {@code BLOB}
 172      *        value that this {@code Blob} object represents
 173      * @return the number of bytes written
 174      * @exception SQLException if there is an error accessing the
 175      *            {@code BLOB} value or if pos is less than 1
 176      * @exception SQLFeatureNotSupportedException if the JDBC driver
 177      *            does not support this method
 178      * @see #getBytes
 179      * @since 1.4
 180      */
 181     int setBytes(long pos, byte[] bytes) throws SQLException;
 182 
 183     /**
 184      * Writes all or part of the given {@code byte} array to the
 185      * {@code BLOB} value that this {@code Blob} object represents
 186      * and returns the number of bytes written.
 187      * Writing starts at position {@code pos} in the {@code BLOB}
 188      * value; {@code len} bytes from the given byte array are written.
 189      * The array of bytes will overwrite the existing bytes
 190      * in the {@code Blob} object starting at the position
 191      * {@code pos}.  If the end of the {@code Blob} value is reached
 192      * while writing the array of bytes, then the length of the {@code Blob}
 193      * value will be increased to accommodate the extra bytes.
 194      * <p>
 195      * <b>Note:</b> If the value specified for {@code pos}
 196      * is greater than the length+1 of the {@code BLOB} value then the
 197      * behavior is undefined. Some JDBC drivers may throw an
 198      * {@code SQLException} while other drivers may support this
 199      * operation.
 200      *
 201      * @param pos the position in the {@code BLOB} object at which
 202      *        to start writing; the first position is 1
 203      * @param bytes the array of bytes to be written to this {@code BLOB}
 204      *        object
 205      * @param offset the offset into the array {@code bytes} at which
 206      *        to start reading the bytes to be set
 207      * @param len the number of bytes to be written to the {@code BLOB}
 208      *        value from the array of bytes {@code bytes}
 209      * @return the number of bytes written
 210      * @exception SQLException if there is an error accessing the
 211      *            {@code BLOB} value or if pos is less than 1
 212      * @exception SQLFeatureNotSupportedException if the JDBC driver
 213      *            does not support this method
 214      * @see #getBytes
 215      * @since 1.4
 216      */
 217     int setBytes(long pos, byte[] bytes, int offset, int len) throws SQLException;
 218 
 219     /**
 220      * Retrieves a stream that can be used to write to the {@code BLOB}
 221      * value that this {@code Blob} object represents.  The stream begins
 222      * at position {@code pos}.
 223      * The  bytes written to the stream will overwrite the existing bytes
 224      * in the {@code Blob} object starting at the position
 225      * {@code pos}.  If the end of the {@code Blob} value is reached
 226      * while writing to the stream, then the length of the {@code Blob}
 227      * value will be increased to accommodate the extra bytes.
 228      * <p>
 229      * <b>Note:</b> If the value specified for {@code pos}
 230      * is greater than the length+1 of the {@code BLOB} value then the
 231      * behavior is undefined. Some JDBC drivers may throw an
 232      * {@code SQLException} while other drivers may support this
 233      * operation.
 234      *
 235      * @param pos the position in the {@code BLOB} value at which
 236      *        to start writing; the first position is 1
 237      * @return a {@code java.io.OutputStream} object to which data can
 238      *         be written
 239      * @exception SQLException if there is an error accessing the
 240      *            {@code BLOB} value or if pos is less than 1
 241      * @exception SQLFeatureNotSupportedException if the JDBC driver
 242      *            does not support this method
 243      * @see #getBinaryStream
 244      * @since 1.4
 245      */
 246     java.io.OutputStream setBinaryStream(long pos) throws SQLException;
 247 
 248     /**
 249      * Truncates the {@code BLOB} value that this {@code Blob}
 250      * object represents to be {@code len} bytes in length.
 251      * <p>
 252      * <b>Note:</b> If the value specified for {@code pos}
 253      * is greater than the length+1 of the {@code BLOB} value then the
 254      * behavior is undefined. Some JDBC drivers may throw an
 255      * {@code SQLException} while other drivers may support this
 256      * operation.
 257      *
 258      * @param len the length, in bytes, to which the {@code BLOB} value
 259      *        that this {@code Blob} object represents should be truncated
 260      * @exception SQLException if there is an error accessing the
 261      *            {@code BLOB} value or if len is less than 0
 262      * @exception SQLFeatureNotSupportedException if the JDBC driver
 263      *            does not support this method
 264      * @since 1.4
 265      */
 266     void truncate(long len) throws SQLException;
 267 
 268     /**
 269      * This method frees the {@code Blob} object and releases the resources that
 270      * it holds. The object is invalid once the {@code free}
 271      * method is called.
 272      * <p>
 273      * After {@code free} has been called, any attempt to invoke a
 274      * method other than {@code free} will result in an {@code SQLException}
 275      * being thrown.  If {@code free} is called multiple times, the subsequent
 276      * calls to {@code free} are treated as a no-op.
 277      *
 278      * @throws SQLException if an error occurs releasing
 279      *         the Blob's resources
 280      * @exception SQLFeatureNotSupportedException if the JDBC driver
 281      *            does not support this method
 282      * @since 1.6
 283      */
 284     void free() throws SQLException;
 285 
 286     /**
 287      * Returns an {@code InputStream} object that contains
 288      * a partial {@code Blob} value, starting with the byte
 289      * specified by pos, which is length bytes in length.
 290      *
 291      * @param pos the offset to the first byte of the partial value to be
 292      *        retrieved. The first byte in the {@code Blob} is at position 1.
 293      * @param length the length in bytes of the partial value to be retrieved
 294      * @return {@code InputStream} through which
 295      *         the partial {@code Blob} value can be read.
 296      * @throws SQLException if pos is less than 1 or if pos is greater
 297      *         than the number of bytes in the {@code Blob} or if
 298      *         pos + length is greater than the number of bytes
 299      *         in the {@code Blob}
 300      *
 301      * @exception SQLFeatureNotSupportedException if the JDBC driver
 302      *            does not support this method
 303      * @since 1.6
 304      */
 305     InputStream getBinaryStream(long pos, long length) throws SQLException;
 306 }





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