| /* |
| * Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package java.sql; |
| |
| import java.io.InputStream; |
| |
| /** |
| * The representation (mapping) in |
| * the Java™ programming language of an SQL |
| * {@code BLOB} value. An SQL {@code BLOB} is a built-in type |
| * that stores a Binary Large Object as a column value in a row of |
| * a database table. By default drivers implement {@code Blob} using |
| * an SQL {@code locator(BLOB)}, which means that a |
| * {@code Blob} object contains a logical pointer to the |
| * SQL {@code BLOB} data rather than the data itself. |
| * A {@code Blob} object is valid for the duration of the |
| * transaction in which is was created. |
| * |
| * <P>Methods in the interfaces {@link ResultSet}, |
| * {@link CallableStatement}, and {@link PreparedStatement}, such as |
| * {@code getBlob} and {@code setBlob} allow a programmer to |
| * access an SQL {@code BLOB} value. |
| * The {@code Blob} interface provides methods for getting the |
| * length of an SQL {@code BLOB} (Binary Large Object) value, |
| * for materializing a {@code BLOB} value on the client, and for |
| * determining the position of a pattern of bytes within a |
| * {@code BLOB} value. In addition, this interface has methods for updating |
| * a {@code BLOB} value. |
| * <p> |
| * All methods on the {@code Blob} interface must be fully implemented if the |
| * JDBC driver supports the data type. |
| * |
| * @since 1.2 |
| */ |
| |
| public interface Blob { |
| |
| /** |
| * Returns the number of bytes in the {@code BLOB} value |
| * designated by this {@code Blob} object. |
| * |
| * @return length of the {@code BLOB} in bytes |
| * @exception SQLException if there is an error accessing the |
| * length of the {@code BLOB} |
| * @exception SQLFeatureNotSupportedException if the JDBC driver |
| * does not support this method |
| * @since 1.2 |
| */ |
| long length() throws SQLException; |
| |
| /** |
| * Retrieves all or part of the {@code BLOB} |
| * value that this {@code Blob} object represents, as an array of |
| * bytes. This {@code byte} array contains up to {@code length} |
| * consecutive bytes starting at position {@code pos}. |
| * |
| * @param pos the ordinal position of the first byte in the |
| * {@code BLOB} value to be extracted; the first byte is at |
| * position 1 |
| * @param length the number of consecutive bytes to be copied; the value |
| * for length must be 0 or greater |
| * @return a byte array containing up to {@code length} |
| * consecutive bytes from the {@code BLOB} value designated |
| * by this {@code Blob} object, starting with the |
| * byte at position {@code pos} |
| * @exception SQLException if there is an error accessing the |
| * {@code BLOB} value; if pos is less than 1 or length is |
| * less than 0 |
| * @exception SQLFeatureNotSupportedException if the JDBC driver |
| * does not support this method |
| * @see #setBytes |
| * @since 1.2 |
| */ |
| byte[] getBytes(long pos, int length) throws SQLException; |
| |
| /** |
| * Retrieves the {@code BLOB} value designated by this |
| * {@code Blob} instance as a stream. |
| * |
| * @return a stream containing the {@code BLOB} data |
| * @exception SQLException if there is an error accessing the |
| * {@code BLOB} value |
| * @exception SQLFeatureNotSupportedException if the JDBC driver |
| * does not support this method |
| * @see #setBinaryStream |
| * @since 1.2 |
| */ |
| java.io.InputStream getBinaryStream () throws SQLException; |
| |
| /** |
| * Retrieves the byte position at which the specified byte array |
| * {@code pattern} begins within the {@code BLOB} |
| * value that this {@code Blob} object represents. |
| * The search for {@code pattern} begins at position |
| * {@code start}. |
| * |
| * @param pattern the byte array for which to search |
| * @param start the position at which to begin searching; the |
| * first position is 1 |
| * @return the position at which the pattern appears, else -1 |
| * @exception SQLException if there is an error accessing the |
| * {@code BLOB} or if start is less than 1 |
| * @exception SQLFeatureNotSupportedException if the JDBC driver |
| * does not support this method |
| * @since 1.2 |
| */ |
| long position(byte pattern[], long start) throws SQLException; |
| |
| /** |
| * Retrieves the byte position in the {@code BLOB} value |
| * designated by this {@code Blob} object at which |
| * {@code pattern} begins. The search begins at position |
| * {@code start}. |
| * |
| * @param pattern the {@code Blob} object designating |
| * the {@code BLOB} value for which to search |
| * @param start the position in the {@code BLOB} value |
| * at which to begin searching; the first position is 1 |
| * @return the position at which the pattern begins, else -1 |
| * @exception SQLException if there is an error accessing the |
| * {@code BLOB} value or if start is less than 1 |
| * @exception SQLFeatureNotSupportedException if the JDBC driver |
| * does not support this method |
| * @since 1.2 |
| */ |
| long position(Blob pattern, long start) throws SQLException; |
| |
| // -------------------------- JDBC 3.0 ----------------------------------- |
| |
| /** |
| * Writes the given array of bytes to the {@code BLOB} value that |
| * this {@code Blob} object represents, starting at position |
| * {@code pos}, and returns the number of bytes written. |
| * The array of bytes will overwrite the existing bytes |
| * in the {@code Blob} object starting at the position |
| * {@code pos}. If the end of the {@code Blob} value is reached |
| * while writing the array of bytes, then the length of the {@code Blob} |
| * value will be increased to accommodate the extra bytes. |
| * <p> |
| * <b>Note:</b> If the value specified for {@code pos} |
| * is greater than the length+1 of the {@code BLOB} value then the |
| * behavior is undefined. Some JDBC drivers may throw an |
| * {@code SQLException} while other drivers may support this |
| * operation. |
| * |
| * @param pos the position in the {@code BLOB} object at which |
| * to start writing; the first position is 1 |
| * @param bytes the array of bytes to be written to the {@code BLOB} |
| * value that this {@code Blob} object represents |
| * @return the number of bytes written |
| * @exception SQLException if there is an error accessing the |
| * {@code BLOB} value or if pos is less than 1 |
| * @exception SQLFeatureNotSupportedException if the JDBC driver |
| * does not support this method |
| * @see #getBytes |
| * @since 1.4 |
| */ |
| int setBytes(long pos, byte[] bytes) throws SQLException; |
| |
| /** |
| * Writes all or part of the given {@code byte} array to the |
| * {@code BLOB} value that this {@code Blob} object represents |
| * and returns the number of bytes written. |
| * Writing starts at position {@code pos} in the {@code BLOB} |
| * value; {@code len} bytes from the given byte array are written. |
| * The array of bytes will overwrite the existing bytes |
| * in the {@code Blob} object starting at the position |
| * {@code pos}. If the end of the {@code Blob} value is reached |
| * while writing the array of bytes, then the length of the {@code Blob} |
| * value will be increased to accommodate the extra bytes. |
| * <p> |
| * <b>Note:</b> If the value specified for {@code pos} |
| * is greater than the length+1 of the {@code BLOB} value then the |
| * behavior is undefined. Some JDBC drivers may throw an |
| * {@code SQLException} while other drivers may support this |
| * operation. |
| * |
| * @param pos the position in the {@code BLOB} object at which |
| * to start writing; the first position is 1 |
| * @param bytes the array of bytes to be written to this {@code BLOB} |
| * object |
| * @param offset the offset into the array {@code bytes} at which |
| * to start reading the bytes to be set |
| * @param len the number of bytes to be written to the {@code BLOB} |
| * value from the array of bytes {@code bytes} |
| * @return the number of bytes written |
| * @exception SQLException if there is an error accessing the |
| * {@code BLOB} value or if pos is less than 1 |
| * @exception SQLFeatureNotSupportedException if the JDBC driver |
| * does not support this method |
| * @see #getBytes |
| * @since 1.4 |
| */ |
| int setBytes(long pos, byte[] bytes, int offset, int len) throws SQLException; |
| |
| /** |
| * Retrieves a stream that can be used to write to the {@code BLOB} |
| * value that this {@code Blob} object represents. The stream begins |
| * at position {@code pos}. |
| * The bytes written to the stream will overwrite the existing bytes |
| * in the {@code Blob} object starting at the position |
| * {@code pos}. If the end of the {@code Blob} value is reached |
| * while writing to the stream, then the length of the {@code Blob} |
| * value will be increased to accommodate the extra bytes. |
| * <p> |
| * <b>Note:</b> If the value specified for {@code pos} |
| * is greater than the length+1 of the {@code BLOB} value then the |
| * behavior is undefined. Some JDBC drivers may throw an |
| * {@code SQLException} while other drivers may support this |
| * operation. |
| * |
| * @param pos the position in the {@code BLOB} value at which |
| * to start writing; the first position is 1 |
| * @return a {@code java.io.OutputStream} object to which data can |
| * be written |
| * @exception SQLException if there is an error accessing the |
| * {@code BLOB} value or if pos is less than 1 |
| * @exception SQLFeatureNotSupportedException if the JDBC driver |
| * does not support this method |
| * @see #getBinaryStream |
| * @since 1.4 |
| */ |
| java.io.OutputStream setBinaryStream(long pos) throws SQLException; |
| |
| /** |
| * Truncates the {@code BLOB} value that this {@code Blob} |
| * object represents to be {@code len} bytes in length. |
| * <p> |
| * <b>Note:</b> If the value specified for {@code pos} |
| * is greater than the length+1 of the {@code BLOB} value then the |
| * behavior is undefined. Some JDBC drivers may throw an |
| * {@code SQLException} while other drivers may support this |
| * operation. |
| * |
| * @param len the length, in bytes, to which the {@code BLOB} value |
| * that this {@code Blob} object represents should be truncated |
| * @exception SQLException if there is an error accessing the |
| * {@code BLOB} value or if len is less than 0 |
| * @exception SQLFeatureNotSupportedException if the JDBC driver |
| * does not support this method |
| * @since 1.4 |
| */ |
| void truncate(long len) throws SQLException; |
| |
| /** |
| * This method frees the {@code Blob} object and releases the resources that |
| * it holds. The object is invalid once the {@code free} |
| * method is called. |
| * <p> |
| * After {@code free} has been called, any attempt to invoke a |
| * method other than {@code free} will result in an {@code SQLException} |
| * being thrown. If {@code free} is called multiple times, the subsequent |
| * calls to {@code free} are treated as a no-op. |
| * |
| * @throws SQLException if an error occurs releasing |
| * the Blob's resources |
| * @exception SQLFeatureNotSupportedException if the JDBC driver |
| * does not support this method |
| * @since 1.6 |
| */ |
| void free() throws SQLException; |
| |
| /** |
| * Returns an {@code InputStream} object that contains |
| * a partial {@code Blob} value, starting with the byte |
| * specified by pos, which is length bytes in length. |
| * |
| * @param pos the offset to the first byte of the partial value to be |
| * retrieved. The first byte in the {@code Blob} is at position 1. |
| * @param length the length in bytes of the partial value to be retrieved |
| * @return {@code InputStream} through which |
| * the partial {@code Blob} value can be read. |
| * @throws SQLException if pos is less than 1 or if pos is greater |
| * than the number of bytes in the {@code Blob} or if |
| * pos + length is greater than the number of bytes |
| * in the {@code Blob} |
| * |
| * @exception SQLFeatureNotSupportedException if the JDBC driver |
| * does not support this method |
| * @since 1.6 |
| */ |
| InputStream getBinaryStream(long pos, long length) throws SQLException; |
| } |
