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148 lines
4.9 KiB
Java
148 lines
4.9 KiB
Java
/* Clob.java -- Access Character Large OBjects
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Copyright (C) 1999, 2000 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.sql;
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import java.io.InputStream;
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import java.io.Reader;
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/**
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* This interface contains methods for accessing a SQL CLOB (Character
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* Large OBject) type.
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*
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* @author Aaron M. Renn (arenn@urbanophile.com)
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*/
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public interface Clob
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{
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/**
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* This method returns the number of characters in the CLOB.
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*
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* @return The number of characters in the CLOB.
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*
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* @exception SQLException If an error occurs.
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*/
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public abstract long
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length() throws SQLException;
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/*************************************************************************/
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/**
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* This method returns the specified portion of the CLOB as a
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* <code>String</code>.
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*
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* @param offset The index into the CLOB (index values start at 1) to
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* start returning characters from.
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* @param length The requested number of characters to return.
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*
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* @return The requested CLOB section, as a <code>String</code>.
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*
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* @exception SQLException If an error occurs.
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*/
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public abstract String
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getSubString(long offset, int length) throws SQLException;
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/*************************************************************************/
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/**
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* This method returns a byte stream that reads the contents of the
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* CLOB as a series of ASCII bytes.
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*
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* @return A stream to read the CLOB's contents.
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*
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* @exception SQLException If an error occurs.
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*/
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public abstract InputStream
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getAsciiStream() throws SQLException;
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/*************************************************************************/
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/**
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* This method returns a character stream that reads the contents of the
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* CLOB.
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*
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* @return A character stream to read the CLOB's contents.
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*
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* @exception SQLException If an error occurs.
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*/
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public abstract Reader
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getCharacterStream() throws SQLException;
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/*************************************************************************/
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/**
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* This method returns the index into the CLOB of the first occurrence of
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* the specified character pattern (supplied by the caller as a
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* <code>String</code>). The search begins at the specified index.
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*
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* @param pattern The character pattern to search for, passed as a
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* <code>String</code>.
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* @param offset. The index into the CLOB to start search (indexes start
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* at 1).
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*
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* @return The index at which the pattern was found (indexes start at 1),
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* or -1 if the pattern was not found.
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*
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* @exception SQLException If an error occurs.
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*/
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public abstract long
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position(String pattern, long offset) throws SQLException;
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/*************************************************************************/
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/**
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* This method returns the index into the CLOB of the first occurrence of
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* the specified character pattern (supplied by the caller as a
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* <code>Clob</code>). The search begins at the specified index.
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*
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* @param pattern The character pattern to search for, passed as a
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* <code>Clob</code>.
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* @param offset. The index into the CLOB to start search (indexes start
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* at 1).
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*
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* @return The index at which the pattern was found (indexes start at 1),
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* or -1 if the pattern was not found.
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*
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* @exception SQLException If an error occurs.
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*/
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public abstract long
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position(Clob pattern, long offset) throws SQLException;
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} // interface Clob
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