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344 lines
9.8 KiB
Java
344 lines
9.8 KiB
Java
/* SQLInput.java -- Read SQL values from a stream
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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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import java.math.BigDecimal;
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/**
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* This interface provides methods for reading values from a stream
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* that is connected to a SQL structured or distinct type. It is used
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* for custom mapping of user defined data types.
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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 SQLInput
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{
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/*************************************************************************/
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/**
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* This method reads the next item from the stream a Java
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* <code>String</code>.
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*
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* @return The value read from the stream 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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readString() throws SQLException;
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/*************************************************************************/
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/**
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* This method reads the next item from the stream a Java
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* <code>boolean</code>.
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*
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* @return The value read from the stream as a <code>boolean</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 boolean
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readBoolean() throws SQLException;
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/*************************************************************************/
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/**
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* This method reads the next item from the stream a Java
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* <code>byte</code>.
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*
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* @return The value read from the stream as a <code>byte</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 byte
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readByte() throws SQLException;
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/*************************************************************************/
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/**
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* This method reads the next item from the stream a Java
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* <code>short</code>.
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*
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* @return The value read from the stream as a <code>short</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 short
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readShort() throws SQLException;
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/*************************************************************************/
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/**
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* This method reads the next item from the stream a Java
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* <code>int</code>.
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*
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* @return The value read from the stream as an <code>int</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 int
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readInt() throws SQLException;
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/*************************************************************************/
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/**
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* This method reads the next item from the stream a Java
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* <code>long</code>.
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*
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* @return The value read from the stream as a <code>long</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 long
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readLong() throws SQLException;
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/*************************************************************************/
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/**
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* This method reads the next item from the stream a Java
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* <code>float</code>.
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*
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* @return The value read from the stream as a <code>float</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 float
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readFloat() throws SQLException;
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/*************************************************************************/
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/**
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* This method reads the next item from the stream a Java
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* <code>double</code>.
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*
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* @return The value read from the stream as a <code>double</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 double
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readDouble() throws SQLException;
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/*************************************************************************/
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/**
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* This method reads the next item from the stream a Java
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* <code>BigDecimal</code>.
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*
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* @return The value read from the stream as a <code>BigDecimal</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 BigDecimal
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readBigDecimal() throws SQLException;
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/*************************************************************************/
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/**
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* This method reads the next item from the stream a Java
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* byte array
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*
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* @return The value read from the stream as a byte array.
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*
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* @exception SQLException If an error occurs.
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*/
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public abstract byte[]
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readBytes() throws SQLException;
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/*************************************************************************/
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/**
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* This method reads the next item from the stream a Java
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* <code>java.sql.Date</code>.
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*
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* @return The value read from the stream as a <code>java.sql.Date</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 java.sql.Date
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readDate() throws SQLException;
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/*************************************************************************/
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/**
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* This method reads the next item from the stream a Java
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* <code>java.sql.Time</code>.
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*
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* @return The value read from the stream as a <code>java.sql.Time</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 java.sql.Time
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readTime() throws SQLException;
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/*************************************************************************/
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/**
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* This method reads the next item from the stream a Java
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* <code>java.sql.Timestamp</code>.
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*
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* @return The value read from the stream as a <code>java.sql.Timestamp</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 java.sql.Timestamp
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readTimestamp() throws SQLException;
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/*************************************************************************/
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/**
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* This method reads the next item from the stream a ASCII text
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* <code>InputStream</code>.
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*
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* @return The value read from the stream as an <code>InputStream</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 InputStream
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readAsciiStream() throws SQLException;
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/*************************************************************************/
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/**
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* This method reads the next item from the stream a binary
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* <code>InputStream</code>.
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*
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* @return The value read from the stream as an <code>InputStream</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 InputStream
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readBinaryStream() throws SQLException;
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/*************************************************************************/
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/**
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* This method reads the next item from the stream a character
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* <code>Reader</code>.
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*
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* @return The value read from the stream as a <code>Reader</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 Reader
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readCharacterStream() throws SQLException;
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/*************************************************************************/
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/**
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* This method reads the next item from the stream a Java
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* <code>Object</code>.
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*
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* @return The value read from the stream as an <code>Object</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 Object
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readObject() throws SQLException;
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/*************************************************************************/
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/**
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* This method reads the next item from the stream a Java SQL
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* <code>Ref</code>.
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*
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* @return The value read from the stream as an <code>Ref</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 Ref
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readRef() throws SQLException;
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/*************************************************************************/
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/**
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* This method reads the next item from the stream a Java SQL
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* <code>Blob</code>.
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*
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* @return The value read from the stream as a <code>Blob</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 Blob
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readBlob() throws SQLException;
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/*************************************************************************/
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/**
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* This method reads the next item from the stream a Java SQL
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* <code>Clob</code>.
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*
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* @return The value read from the stream as a <code>Clob</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 Clob
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readClob() throws SQLException;
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/*************************************************************************/
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/**
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* This method reads the next item from the stream a Java SQL
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* <code>Array</code>.
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*
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* @return The value read from the stream as an <code>Array</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 Array
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readArray() throws SQLException;
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/*************************************************************************/
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/**
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* This method tests whether or not the last value read was a SQL
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* NULL value.
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*
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* @return <code>true</code> if the last value read was a NULL,
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* <code>false</code> otherwise.
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*
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* @exception SQLException If an error occurs.
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*/
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public abstract boolean
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wasNull() throws SQLException;
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} // interface SQLInput
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