toolchain/gcc/libjava/java/sql/Clob.java

   1 /* Clob.java -- Access Character Large OBjects
   2    Copyright (C) 1999, 2000, 2002 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Classpath.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19 02111-1307 USA.
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 independent module, the terms and conditions of the license of that
  32 module.  An independent module is a module which is not derived from
  33 or based on this library.  If you modify this library, you may extend
  34 this exception to your version of the library, but you are not
  35 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version. */
  37
  38 package java.sql;
  39
  40 import java.io.InputStream;
  41 import java.io.OutputStream;
  42 import java.io.Reader;
  43 import java.io.Writer;
  44
  45 /**
  46  * This interface contains methods for accessing a SQL CLOB (Character
  47  * Large OBject) type.
  48  *
  49  * @author Aaron M. Renn (arenn@urbanophile.com)
  50  */
  51 public interface Clob
  52 {
  53  /**
  54   * This method returns the number of characters in the CLOB.
  55   *
  56   * @return The number of characters in the CLOB.
  57   * @exception SQLException If an error occurs.
  58   * @since 1.2
  59   */
  60   long length() throws SQLException;
  61
  62   /**
  63    * This method returns the specified portion of the CLOB as a
  64    * <code>String</code>.
  65    *
  66    * @param offset The index into the CLOB (index values start at 1) to
  67    *        start returning characters from.
  68    * @param length The requested number of characters to return.
  69    * @return The requested CLOB section, as a <code>String</code>.
  70    * @exception SQLException If an error occurs.
  71    * @since 1.2
  72    */
  73   String getSubString(long pos, int length) throws SQLException;
  74
  75   /**
  76    * This method returns a character stream that reads the contents of the
  77    * CLOB.
  78    *
  79    * @return A character stream to read the CLOB's contents.
  80    * @exception SQLException If an error occurs.
  81    * @since 1.2
  82    */
  83   Reader getCharacterStream() throws SQLException;
  84
  85   /**
  86    * This method returns a byte stream that reads the contents of the
  87    * CLOB as a series of ASCII bytes.
  88    *
  89    * @return A stream to read the CLOB's contents.
  90    * @exception SQLException If an error occurs.
  91    * @since 1.2
  92    */
  93   InputStream getAsciiStream() throws SQLException;
  94
  95   /**
  96    * This method returns the index into the CLOB of the first occurrence of
  97    * the specified character pattern (supplied by the caller as a
  98    * <code>String</code>).  The search begins at the specified index.
  99    *
 100    * @param searchstr The character pattern to search for, passed as a
 101    *        <code>String</code>.
 102    * @param start.  The index into the CLOB to start search (indexes start
 103    *        at 1).
 104    * @return The index at which the pattern was found (indexes start at 1),
 105    *         or -1 if the pattern was not found.
 106    * @exception SQLException If an error occurs.
 107    * @since 1.2
 108    */
 109   long position(String searchstr, long start) throws SQLException;
 110
 111   /**
 112    * This method returns the index into the CLOB of the first occurrence of
 113    * the specified character pattern (supplied by the caller as a
 114    * <code>Clob</code>).  The search begins at the specified index.
 115    *
 116    * @param searchstr The character pattern to search for, passed as a
 117    *        <code>Clob</code>.
 118    * @param start.  The index into the CLOB to start search (indexes start
 119    *        at 1).
 120    * @return The index at which the pattern was found (indexes start at 1),
 121    *         or -1 if the pattern was not found.
 122    * @exception SQLException If an error occurs.
 123    * @since 1.2
 124    */
 125   long position(Clob searchstr, long start) throws SQLException;
 126
 127   /**
 128    * @since 1.4
 129    */
 130   int setString(long pos, String str) throws SQLException;
 131
 132   /**
 133    * @since 1.4
 134    */
 135   int setString(long pos, String str, int offset, int len)
 136     throws SQLException;
 137
 138   /**
 139    * @since 1.4
 140    */
 141   OutputStream setAsciiStream(long pos) throws SQLException;
 142
 143   /**
 144    * @since 1.4
 145    */
 146   Writer setCharacterStream(long pos) throws SQLException;
 147
 148   /**
 149    * @since 1.4
 150    */
 151   void truncate(long len) throws SQLException;
 152 }