gcc/libjava/java/sql/SQLInput.java

/* SQLInput.java -- Read SQL values from a stream
   Copyright (C) 1999, 2000, 2002 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
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any later version.
 
GNU Classpath 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 for more details.

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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
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As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
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terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
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this exception to your version of the library, but you are not
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package java.sql;

import java.io.InputStream;
import java.io.Reader;
import java.math.BigDecimal;
import java.net.URL;

/**
 * This interface provides methods for reading values from a stream
 * that is connected to a SQL structured or distinct type.  It is used
 * for custom mapping of user defined data types.
 *
 * @author Aaron M. Renn (arenn@urbanophile.com)
 */
public interface SQLInput 
{
  /**
   * This method reads the next item from the stream a Java
   * <code>String</code>.
   *
   * @return The value read from the stream as a <code>String</code>.
   * @exception SQLException If an error occurs.
   */
  public String readString() throws SQLException;

  /**
   * This method reads the next item from the stream a Java
   * <code>boolean</code>.
   *
   * @return The value read from the stream as a <code>boolean</code>.
   * @exception SQLException If an error occurs.
   */
  public boolean readBoolean() throws SQLException;

  /**
   * This method reads the next item from the stream a Java
   * <code>byte</code>.
   *
   * @return The value read from the stream as a <code>byte</code>.
   * @exception SQLException If an error occurs.
   */
  public byte readByte() throws SQLException;

  /**
   * This method reads the next item from the stream a Java
   * <code>short</code>.
   *
   * @return The value read from the stream as a <code>short</code>.
   * @exception SQLException If an error occurs.
   */
  public short readShort() throws SQLException;

  /**
   * This method reads the next item from the stream a Java
   * <code>int</code>.
   *
   * @return The value read from the stream as an <code>int</code>.
   * @exception SQLException If an error occurs.
   */
  public int readInt() throws SQLException;

  /**
   * This method reads the next item from the stream a Java
   * <code>long</code>.
   *
   * @return The value read from the stream as a <code>long</code>.
   * @exception SQLException If an error occurs.
   */
  public long readLong() throws SQLException;

  /**
   * This method reads the next item from the stream a Java
   * <code>float</code>.
   *
   * @return The value read from the stream as a <code>float</code>.
   * @exception SQLException If an error occurs.
   */
  public float readFloat() throws SQLException;

  /**
   * This method reads the next item from the stream a Java
   * <code>double</code>.
   *
   * @return The value read from the stream as a <code>double</code>.
   * @exception SQLException If an error occurs.
   */
  public double readDouble() throws SQLException;

  /**
   * This method reads the next item from the stream a Java
   * <code>BigDecimal</code>.
   *
   * @return The value read from the stream as a <code>BigDecimal</code>.
   * @exception SQLException If an error occurs.
   */
  public BigDecimal readBigDecimal() throws SQLException;

  /**
   * This method reads the next item from the stream a Java
   * byte array
   *
   * @return The value read from the stream as a byte array. 
   * @exception SQLException If an error occurs.
   */
  public byte[] readBytes() throws SQLException;

  /**
   * This method reads the next item from the stream a Java
   * <code>java.sql.Date</code>.
   *
   * @return The value read from the stream as a <code>java.sql.Date</code>.
   * @exception SQLException If an error occurs.
   */
  public Date readDate() throws SQLException;

  /**
   * This method reads the next item from the stream a Java
   * <code>java.sql.Time</code>.
   *
   * @return The value read from the stream as a <code>java.sql.Time</code>.
   * @exception SQLException If an error occurs.
   */
  public Time readTime() throws SQLException;

  /**
   * This method reads the next item from the stream a Java
   * <code>java.sql.Timestamp</code>.
   *
   * @return The value read from the stream as a <code>java.sql.Timestamp</code>.
   * @exception SQLException If an error occurs.
   */
  public Timestamp readTimestamp() throws SQLException;

  /**
   * This method reads the next item from the stream a character
   * <code>Reader</code>.
   *
   * @return The value read from the stream as a <code>Reader</code>.
   * @exception SQLException If an error occurs.
   */
  public Reader readCharacterStream() throws SQLException;

  /**
   * This method reads the next item from the stream a ASCII text
   * <code>InputStream</code>.
   *
   * @return The value read from the stream as an <code>InputStream</code>.
   * @exception SQLException If an error occurs.
   */
  public InputStream readAsciiStream() throws SQLException;

  /**
   * This method reads the next item from the stream a binary
   * <code>InputStream</code>.
   *
   * @return The value read from the stream as an <code>InputStream</code>.
   * @exception SQLException If an error occurs.
   */
  public InputStream readBinaryStream() throws SQLException;

  /**
   * This method reads the next item from the stream a Java
   * <code>Object</code>.
   *
   * @return The value read from the stream as an <code>Object</code>.
   * @exception SQLException If an error occurs.
   */
  public Object readObject() throws SQLException;

  /**
   * This method reads the next item from the stream a Java SQL
   * <code>Ref</code>.
   *
   * @return The value read from the stream as an <code>Ref</code>.
   * @exception SQLException If an error occurs.
   */
  public Ref readRef() throws SQLException;

  /**
   * This method reads the next item from the stream a Java SQL
   * <code>Blob</code>.
   *
   * @return The value read from the stream as a <code>Blob</code>.
   * @exception SQLException If an error occurs.
   */
  public Blob readBlob() throws SQLException;

  /**
   * This method reads the next item from the stream a Java SQL
   * <code>Clob</code>.
   *
   * @return The value read from the stream as a <code>Clob</code>.
   * @exception SQLException If an error occurs.
   */
  public Clob readClob() throws SQLException;

  /**
   * This method reads the next item from the stream a Java SQL
   * <code>Array</code>.
   *
   * @return The value read from the stream as an <code>Array</code>.
   * @exception SQLException If an error occurs.
   */
  public Array readArray() throws SQLException;

  /**
   * This method tests whether or not the last value read was a SQL
   * NULL value.
   *
   * @return <code>true</code> if the last value read was a NULL,
   *         <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  public boolean wasNull() throws SQLException;

  /**
   * @since 1.4
   */
  public URL readURL() throws SQLException;
}