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645 lines
24 KiB
645 lines
24 KiB
/*
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* Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*/
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package javax.sql.rowset.serial;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.sql.*;
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import java.util.Map;
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import java.util.Vector;
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/**
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* The output stream for writing the attributes of a
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* custom-mapped user-defined type (UDT) back to the database.
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* The driver uses this interface internally, and its
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* methods are never directly invoked by an application programmer.
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* <p>
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* When an application calls the
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* method <code>PreparedStatement.setObject</code>, the driver
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* checks to see whether the value to be written is a UDT with
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* a custom mapping. If it is, there will be an entry in a
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* type map containing the <code>Class</code> object for the
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* class that implements <code>SQLData</code> for this UDT.
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* If the value to be written is an instance of <code>SQLData</code>,
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* the driver will create an instance of <code>SQLOutputImpl</code>
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* and pass it to the method <code>SQLData.writeSQL</code>.
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* The method <code>writeSQL</code> in turn calls the
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* appropriate <code>SQLOutputImpl.writeXXX</code> methods
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* to write data from the <code>SQLData</code> object to
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* the <code>SQLOutputImpl</code> output stream as the
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* representation of an SQL user-defined type.
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*/
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public class SQLOutputImpl implements SQLOutput {
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/**
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* A reference to an existing vector that
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* contains the attributes of a <code>Struct</code> object.
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*/
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@SuppressWarnings("rawtypes")
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private Vector attribs;
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/**
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* The type map the driver supplies to a newly created
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* <code>SQLOutputImpl</code> object. This type map
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* indicates the <code>SQLData</code> class whose
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* <code>writeSQL</code> method will be called. This
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* method will in turn call the appropriate
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* <code>SQLOutputImpl</code> writer methods.
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*/
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@SuppressWarnings("rawtypes")
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private Map map;
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/**
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* Creates a new <code>SQLOutputImpl</code> object
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* initialized with the given vector of attributes and
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* type map. The driver will use the type map to determine
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* which <code>SQLData.writeSQL</code> method to invoke.
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* This method will then call the appropriate
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* <code>SQLOutputImpl</code> writer methods in order and
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* thereby write the attributes to the new output stream.
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*
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* @param attributes a <code>Vector</code> object containing the attributes of
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* the UDT to be mapped to one or more objects in the Java
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* programming language
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*
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* @param map a <code>java.util.Map</code> object containing zero or
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* more entries, with each entry consisting of 1) a <code>String</code>
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* giving the fully qualified name of a UDT and 2) the
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* <code>Class</code> object for the <code>SQLData</code> implementation
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* that defines how the UDT is to be mapped
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* @throws SQLException if the <code>attributes</code> or the <code>map</code>
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* is a <code>null</code> value
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*/
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public SQLOutputImpl(Vector<?> attributes, Map<String,?> map)
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throws SQLException
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{
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if ((attributes == null) || (map == null)) {
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throw new SQLException("Cannot instantiate a SQLOutputImpl " +
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"instance with null parameters");
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}
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this.attribs = attributes;
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this.map = map;
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}
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//================================================================
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// Methods for writing attributes to the stream of SQL data.
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// These methods correspond to the column-accessor methods of
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// java.sql.ResultSet.
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//================================================================
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/**
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* Writes a <code>String</code> in the Java programming language
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* to this <code>SQLOutputImpl</code> object. The driver converts
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* it to an SQL <code>CHAR</code>, <code>VARCHAR</code>, or
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* <code>LONGVARCHAR</code> before returning it to the database.
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*
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* @param x the value to pass to the database
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* @throws SQLException if the <code>SQLOutputImpl</code> object is in
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* use by a <code>SQLData</code> object attempting to write the attribute
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* values of a UDT to the database.
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*/
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@SuppressWarnings("unchecked")
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public void writeString(String x) throws SQLException {
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//System.out.println("Adding :"+x);
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attribs.add(x);
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}
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/**
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* Writes a <code>boolean</code> in the Java programming language
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* to this <code>SQLOutputImpl</code> object. The driver converts
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* it to an SQL <code>BIT</code> before returning it to the database.
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*
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* @param x the value to pass to the database
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* @throws SQLException if the <code>SQLOutputImpl</code> object is in
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* use by a <code>SQLData</code> object attempting to write the attribute
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* values of a UDT to the database.
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*/
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@SuppressWarnings("unchecked")
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public void writeBoolean(boolean x) throws SQLException {
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attribs.add(Boolean.valueOf(x));
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}
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/**
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* Writes a <code>byte</code> in the Java programming language
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* to this <code>SQLOutputImpl</code> object. The driver converts
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* it to an SQL <code>BIT</code> before returning it to the database.
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*
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* @param x the value to pass to the database
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* @throws SQLException if the <code>SQLOutputImpl</code> object is in
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* use by a <code>SQLData</code> object attempting to write the attribute
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* values of a UDT to the database.
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*/
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@SuppressWarnings("unchecked")
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public void writeByte(byte x) throws SQLException {
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attribs.add(Byte.valueOf(x));
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}
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/**
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* Writes a <code>short</code> in the Java programming language
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* to this <code>SQLOutputImpl</code> object. The driver converts
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* it to an SQL <code>SMALLINT</code> before returning it to the database.
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*
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* @param x the value to pass to the database
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* @throws SQLException if the <code>SQLOutputImpl</code> object is in
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* use by a <code>SQLData</code> object attempting to write the attribute
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* values of a UDT to the database.
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*/
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@SuppressWarnings("unchecked")
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public void writeShort(short x) throws SQLException {
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attribs.add(Short.valueOf(x));
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}
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/**
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* Writes an <code>int</code> in the Java programming language
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* to this <code>SQLOutputImpl</code> object. The driver converts
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* it to an SQL <code>INTEGER</code> before returning it to the database.
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*
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* @param x the value to pass to the database
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* @throws SQLException if the <code>SQLOutputImpl</code> object is in
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* use by a <code>SQLData</code> object attempting to write the attribute
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* values of a UDT to the database.
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*/
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@SuppressWarnings("unchecked")
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public void writeInt(int x) throws SQLException {
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attribs.add(Integer.valueOf(x));
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}
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/**
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* Writes a <code>long</code> in the Java programming language
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* to this <code>SQLOutputImpl</code> object. The driver converts
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* it to an SQL <code>BIGINT</code> before returning it to the database.
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*
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* @param x the value to pass to the database
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* @throws SQLException if the <code>SQLOutputImpl</code> object is in
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* use by a <code>SQLData</code> object attempting to write the attribute
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* values of a UDT to the database.
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*/
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@SuppressWarnings("unchecked")
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public void writeLong(long x) throws SQLException {
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attribs.add(Long.valueOf(x));
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}
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/**
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* Writes a <code>float</code> in the Java programming language
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* to this <code>SQLOutputImpl</code> object. The driver converts
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* it to an SQL <code>REAL</code> before returning it to the database.
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*
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* @param x the value to pass to the database
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* @throws SQLException if the <code>SQLOutputImpl</code> object is in
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* use by a <code>SQLData</code> object attempting to write the attribute
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* values of a UDT to the database.
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*/
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@SuppressWarnings("unchecked")
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public void writeFloat(float x) throws SQLException {
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attribs.add(Float.valueOf(x));
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}
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/**
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* Writes a <code>double</code> in the Java programming language
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* to this <code>SQLOutputImpl</code> object. The driver converts
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* it to an SQL <code>DOUBLE</code> before returning it to the database.
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*
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* @param x the value to pass to the database
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* @throws SQLException if the <code>SQLOutputImpl</code> object is in
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* use by a <code>SQLData</code> object attempting to write the attribute
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* values of a UDT to the database.
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*/
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@SuppressWarnings("unchecked")
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public void writeDouble(double x) throws SQLException{
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attribs.add(Double.valueOf(x));
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}
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/**
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* Writes a <code>java.math.BigDecimal</code> object in the Java programming
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* language to this <code>SQLOutputImpl</code> object. The driver converts
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* it to an SQL <code>NUMERIC</code> before returning it to the database.
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*
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* @param x the value to pass to the database
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* @throws SQLException if the <code>SQLOutputImpl</code> object is in
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* use by a <code>SQLData</code> object attempting to write the attribute
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* values of a UDT to the database.
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*/
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@SuppressWarnings("unchecked")
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public void writeBigDecimal(java.math.BigDecimal x) throws SQLException{
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attribs.add(x);
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}
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/**
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* Writes an array of <code>bytes</code> in the Java programming language
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* to this <code>SQLOutputImpl</code> object. The driver converts
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* it to an SQL <code>VARBINARY</code> or <code>LONGVARBINARY</code>
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* before returning it to the database.
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*
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* @param x the value to pass to the database
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* @throws SQLException if the <code>SQLOutputImpl</code> object is in
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* use by a <code>SQLData</code> object attempting to write the attribute
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* values of a UDT to the database.
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*/
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@SuppressWarnings("unchecked")
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public void writeBytes(byte[] x) throws SQLException {
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attribs.add(x);
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}
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/**
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* Writes a <code>java.sql.Date</code> object in the Java programming
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* language to this <code>SQLOutputImpl</code> object. The driver converts
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* it to an SQL <code>DATE</code> before returning it to the database.
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*
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* @param x the value to pass to the database
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* @throws SQLException if the <code>SQLOutputImpl</code> object is in
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* use by a <code>SQLData</code> object attempting to write the attribute
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* values of a UDT to the database.
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*/
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@SuppressWarnings("unchecked")
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public void writeDate(java.sql.Date x) throws SQLException {
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attribs.add(x);
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}
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/**
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* Writes a <code>java.sql.Time</code> object in the Java programming
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* language to this <code>SQLOutputImpl</code> object. The driver converts
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* it to an SQL <code>TIME</code> before returning it to the database.
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*
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* @param x the value to pass to the database
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* @throws SQLException if the <code>SQLOutputImpl</code> object is in
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* use by a <code>SQLData</code> object attempting to write the attribute
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* values of a UDT to the database.
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*/
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@SuppressWarnings("unchecked")
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public void writeTime(java.sql.Time x) throws SQLException {
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attribs.add(x);
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}
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/**
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* Writes a <code>java.sql.Timestamp</code> object in the Java programming
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* language to this <code>SQLOutputImpl</code> object. The driver converts
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* it to an SQL <code>TIMESTAMP</code> before returning it to the database.
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*
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* @param x the value to pass to the database
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* @throws SQLException if the <code>SQLOutputImpl</code> object is in
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* use by a <code>SQLData</code> object attempting to write the attribute
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* values of a UDT to the database.
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*/
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@SuppressWarnings("unchecked")
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public void writeTimestamp(java.sql.Timestamp x) throws SQLException {
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attribs.add(x);
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}
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/**
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* Writes a stream of Unicode characters to this
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* <code>SQLOutputImpl</code> object. The driver will do any necessary
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* conversion from Unicode to the database <code>CHAR</code> format.
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*
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* @param x the value to pass to the database
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* @throws SQLException if the <code>SQLOutputImpl</code> object is in
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* use by a <code>SQLData</code> object attempting to write the attribute
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* values of a UDT to the database.
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*/
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@SuppressWarnings("unchecked")
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public void writeCharacterStream(java.io.Reader x) throws SQLException {
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BufferedReader bufReader = new BufferedReader(x);
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try {
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int i;
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while( (i = bufReader.read()) != -1 ) {
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char ch = (char)i;
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StringBuffer strBuf = new StringBuffer();
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strBuf.append(ch);
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String str = new String(strBuf);
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String strLine = bufReader.readLine();
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writeString(str.concat(strLine));
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}
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} catch(IOException ioe) {
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}
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}
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/**
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* Writes a stream of ASCII characters to this
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* <code>SQLOutputImpl</code> object. The driver will do any necessary
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* conversion from ASCII to the database <code>CHAR</code> format.
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*
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* @param x the value to pass to the database
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* @throws SQLException if the <code>SQLOutputImpl</code> object is in
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* use by a <code>SQLData</code> object attempting to write the attribute
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* values of a UDT to the database.
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*/
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@SuppressWarnings("unchecked")
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public void writeAsciiStream(java.io.InputStream x) throws SQLException {
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BufferedReader bufReader = new BufferedReader(new InputStreamReader(x));
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try {
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int i;
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while( (i=bufReader.read()) != -1 ) {
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char ch = (char)i;
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StringBuffer strBuf = new StringBuffer();
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strBuf.append(ch);
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String str = new String(strBuf);
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String strLine = bufReader.readLine();
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writeString(str.concat(strLine));
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}
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}catch(IOException ioe) {
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throw new SQLException(ioe.getMessage());
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}
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}
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/**
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* Writes a stream of uninterpreted bytes to this <code>SQLOutputImpl</code>
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* object.
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*
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* @param x the value to pass to the database
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* @throws SQLException if the <code>SQLOutputImpl</code> object is in
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* use by a <code>SQLData</code> object attempting to write the attribute
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* values of a UDT to the database.
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*/
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@SuppressWarnings("unchecked")
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public void writeBinaryStream(java.io.InputStream x) throws SQLException {
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BufferedReader bufReader = new BufferedReader(new InputStreamReader(x));
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try {
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int i;
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while( (i=bufReader.read()) != -1 ) {
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char ch = (char)i;
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StringBuffer strBuf = new StringBuffer();
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strBuf.append(ch);
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String str = new String(strBuf);
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String strLine = bufReader.readLine();
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writeString(str.concat(strLine));
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}
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} catch(IOException ioe) {
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throw new SQLException(ioe.getMessage());
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}
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}
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//================================================================
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// Methods for writing items of SQL user-defined types to the stream.
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// These methods pass objects to the database as values of SQL
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// Structured Types, Distinct Types, Constructed Types, and Locator
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// Types. They decompose the Java object(s) and write leaf data
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// items using the methods above.
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//================================================================
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/**
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* Writes to the stream the data contained in the given
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* <code>SQLData</code> object.
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* When the <code>SQLData</code> object is <code>null</code>, this
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* method writes an SQL <code>NULL</code> to the stream.
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* Otherwise, it calls the <code>SQLData.writeSQL</code>
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* method of the given object, which
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* writes the object's attributes to the stream.
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* <P>
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* The implementation of the method <code>SQLData.writeSQ</code>
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* calls the appropriate <code>SQLOutputImpl.writeXXX</code> method(s)
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* for writing each of the object's attributes in order.
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* The attributes must be read from an <code>SQLInput</code>
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* input stream and written to an <code>SQLOutputImpl</code>
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* output stream in the same order in which they were
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* listed in the SQL definition of the user-defined type.
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*
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* @param x the object representing data of an SQL structured or
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* distinct type
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* @throws SQLException if the <code>SQLOutputImpl</code> object is in
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* use by a <code>SQLData</code> object attempting to write the attribute
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* values of a UDT to the database.
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*/
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@SuppressWarnings("unchecked")
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public void writeObject(SQLData x) throws SQLException {
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/*
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* Except for the types that are passed as objects
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* this seems to be the only way for an object to
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* get a null value for a field in a structure.
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*
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* Note: this means that the class defining SQLData
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* will need to track if a field is SQL null for itself
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*/
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if (x == null) {
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attribs.add(null);
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} else {
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/*
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* We have to write out a SerialStruct that contains
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* the name of this class otherwise we don't know
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* what to re-instantiate during readSQL()
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*/
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attribs.add(new SerialStruct(x, map));
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}
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}
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/**
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* Writes a <code>Ref</code> object in the Java programming language
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* to this <code>SQLOutputImpl</code> object. The driver converts
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* it to a serializable <code>SerialRef</code> SQL <code>REF</code> value
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* before returning it to the database.
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*
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* @param x an object representing an SQL <code>REF</code> value
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* @throws SQLException if the <code>SQLOutputImpl</code> object is in
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* use by a <code>SQLData</code> object attempting to write the attribute
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* values of a UDT to the database.
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*/
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@SuppressWarnings("unchecked")
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public void writeRef(Ref x) throws SQLException {
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if (x == null) {
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attribs.add(null);
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} else {
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attribs.add(new SerialRef(x));
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}
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}
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/**
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* Writes a <code>Blob</code> object in the Java programming language
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* to this <code>SQLOutputImpl</code> object. The driver converts
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* it to a serializable <code>SerialBlob</code> SQL <code>BLOB</code> value
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* before returning it to the database.
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*
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* @param x an object representing an SQL <code>BLOB</code> value
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* @throws SQLException if the <code>SQLOutputImpl</code> object is in
|
|
* use by a <code>SQLData</code> object attempting to write the attribute
|
|
* values of a UDT to the database.
|
|
*/
|
|
@SuppressWarnings("unchecked")
|
|
public void writeBlob(Blob x) throws SQLException {
|
|
if (x == null) {
|
|
attribs.add(null);
|
|
} else {
|
|
attribs.add(new SerialBlob(x));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes a <code>Clob</code> object in the Java programming language
|
|
* to this <code>SQLOutputImpl</code> object. The driver converts
|
|
* it to a serializable <code>SerialClob</code> SQL <code>CLOB</code> value
|
|
* before returning it to the database.
|
|
*
|
|
* @param x an object representing an SQL <code>CLOB</code> value
|
|
* @throws SQLException if the <code>SQLOutputImpl</code> object is in
|
|
* use by a <code>SQLData</code> object attempting to write the attribute
|
|
* values of a UDT to the database.
|
|
*/
|
|
@SuppressWarnings("unchecked")
|
|
public void writeClob(Clob x) throws SQLException {
|
|
if (x == null) {
|
|
attribs.add(null);
|
|
} else {
|
|
attribs.add(new SerialClob(x));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes a <code>Struct</code> object in the Java
|
|
* programming language to this <code>SQLOutputImpl</code>
|
|
* object. The driver converts this value to an SQL structured type
|
|
* before returning it to the database.
|
|
* <P>
|
|
* This method should be used when an SQL structured type has been
|
|
* mapped to a <code>Struct</code> object in the Java programming
|
|
* language (the standard mapping). The method
|
|
* <code>writeObject</code> should be used if an SQL structured type
|
|
* has been custom mapped to a class in the Java programming language.
|
|
*
|
|
* @param x an object representing the attributes of an SQL structured type
|
|
* @throws SQLException if the <code>SQLOutputImpl</code> object is in
|
|
* use by a <code>SQLData</code> object attempting to write the attribute
|
|
* values of a UDT to the database.
|
|
*/
|
|
@SuppressWarnings("unchecked")
|
|
public void writeStruct(Struct x) throws SQLException {
|
|
SerialStruct s = new SerialStruct(x,map);;
|
|
attribs.add(s);
|
|
}
|
|
|
|
/**
|
|
* Writes an <code>Array</code> object in the Java
|
|
* programming language to this <code>SQLOutputImpl</code>
|
|
* object. The driver converts this value to a serializable
|
|
* <code>SerialArray</code> SQL <code>ARRAY</code>
|
|
* value before returning it to the database.
|
|
*
|
|
* @param x an object representing an SQL <code>ARRAY</code> value
|
|
* @throws SQLException if the <code>SQLOutputImpl</code> object is in
|
|
* use by a <code>SQLData</code> object attempting to write the attribute
|
|
* values of a UDT to the database.
|
|
*/
|
|
@SuppressWarnings("unchecked")
|
|
public void writeArray(Array x) throws SQLException {
|
|
if (x == null) {
|
|
attribs.add(null);
|
|
} else {
|
|
attribs.add(new SerialArray(x, map));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes an <code>java.sql.Type.DATALINK</code> object in the Java
|
|
* programming language to this <code>SQLOutputImpl</code> object. The
|
|
* driver converts this value to a serializable <code>SerialDatalink</code>
|
|
* SQL <code>DATALINK</code> value before return it to the database.
|
|
*
|
|
* @param url an object representing a SQL <code>DATALINK</code> value
|
|
* @throws SQLException if the <code>SQLOutputImpl</code> object is in
|
|
* use by a <code>SQLData</code> object attempting to write the attribute
|
|
* values of a UDT to the database.
|
|
*/
|
|
@SuppressWarnings("unchecked")
|
|
public void writeURL(java.net.URL url) throws SQLException {
|
|
if (url == null) {
|
|
attribs.add(null);
|
|
} else {
|
|
attribs.add(new SerialDatalink(url));
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Writes the next attribute to the stream as a <code>String</code>
|
|
* in the Java programming language. The driver converts this to a
|
|
* SQL <code>NCHAR</code> or
|
|
* <code>NVARCHAR</code> or <code>LONGNVARCHAR</code> value
|
|
* (depending on the argument's
|
|
* size relative to the driver's limits on <code>NVARCHAR</code> values)
|
|
* when it sends it to the stream.
|
|
*
|
|
* @param x the value to pass to the database
|
|
* @exception SQLException if a database access error occurs
|
|
* @since 1.6
|
|
*/
|
|
@SuppressWarnings("unchecked")
|
|
public void writeNString(String x) throws SQLException {
|
|
attribs.add(x);
|
|
}
|
|
|
|
/**
|
|
* Writes an SQL <code>NCLOB</code> value to the stream.
|
|
*
|
|
* @param x a <code>NClob</code> object representing data of an SQL
|
|
* <code>NCLOB</code> value
|
|
*
|
|
* @exception SQLException if a database access error occurs
|
|
* @since 1.6
|
|
*/
|
|
@SuppressWarnings("unchecked")
|
|
public void writeNClob(NClob x) throws SQLException {
|
|
attribs.add(x);
|
|
}
|
|
|
|
|
|
/**
|
|
* Writes an SQL <code>ROWID</code> value to the stream.
|
|
*
|
|
* @param x a <code>RowId</code> object representing data of an SQL
|
|
* <code>ROWID</code> value
|
|
*
|
|
* @exception SQLException if a database access error occurs
|
|
* @since 1.6
|
|
*/
|
|
@SuppressWarnings("unchecked")
|
|
public void writeRowId(RowId x) throws SQLException {
|
|
attribs.add(x);
|
|
}
|
|
|
|
|
|
/**
|
|
* Writes an SQL <code>XML</code> value to the stream.
|
|
*
|
|
* @param x a <code>SQLXML</code> object representing data of an SQL
|
|
* <code>XML</code> value
|
|
*
|
|
* @exception SQLException if a database access error occurs
|
|
* @since 1.6
|
|
*/
|
|
@SuppressWarnings("unchecked")
|
|
public void writeSQLXML(SQLXML x) throws SQLException {
|
|
attribs.add(x);
|
|
}
|
|
|
|
}
|