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Another attempt at 7.0
This commit is contained in:
Peter Mount
661
src/interfaces/jdbc/org/postgresql/jdbc2/PreparedStatement.java
Normal file
661
src/interfaces/jdbc/org/postgresql/jdbc2/PreparedStatement.java
Normal file
@ -0,0 +1,661 @@
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package org.postgresql.jdbc2;
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// IMPORTANT NOTE: This file implements the JDBC 2 version of the driver.
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// If you make any modifications to this file, you must make sure that the
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// changes are also made (if relevent) to the related JDBC 1 class in the
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// org.postgresql.jdbc1 package.
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import java.io.*;
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import java.math.*;
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import java.sql.*;
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import java.text.*;
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import java.util.*;
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import org.postgresql.largeobject.*;
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import org.postgresql.util.*;
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/**
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* A SQL Statement is pre-compiled and stored in a PreparedStatement object.
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* This object can then be used to efficiently execute this statement multiple
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* times.
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*
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* <p><B>Note:</B> The setXXX methods for setting IN parameter values must
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* specify types that are compatible with the defined SQL type of the input
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* parameter. For instance, if the IN parameter has SQL type Integer, then
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* setInt should be used.
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*
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* <p>If arbitrary parameter type conversions are required, then the setObject
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* method should be used with a target SQL type.
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*
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* @see ResultSet
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* @see java.sql.PreparedStatement
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*/
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public class PreparedStatement extends Statement implements java.sql.PreparedStatement
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{
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String sql;
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String[] templateStrings;
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String[] inStrings;
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Connection connection;
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/**
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* Constructor for the PreparedStatement class.
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* Split the SQL statement into segments - separated by the arguments.
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* When we rebuild the thing with the arguments, we can substitute the
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* args and join the whole thing together.
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*
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* @param conn the instanatiating connection
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* @param sql the SQL statement with ? for IN markers
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* @exception SQLException if something bad occurs
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*/
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public PreparedStatement(Connection connection, String sql) throws SQLException
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{
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super(connection);
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Vector v = new Vector();
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boolean inQuotes = false;
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int lastParmEnd = 0, i;
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this.sql = sql;
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this.connection = connection;
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for (i = 0; i < sql.length(); ++i)
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{
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int c = sql.charAt(i);
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if (c == '\'')
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inQuotes = !inQuotes;
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if (c == '?' && !inQuotes)
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{
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v.addElement(sql.substring (lastParmEnd, i));
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lastParmEnd = i + 1;
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}
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}
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v.addElement(sql.substring (lastParmEnd, sql.length()));
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templateStrings = new String[v.size()];
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inStrings = new String[v.size() - 1];
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clearParameters();
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for (i = 0 ; i < templateStrings.length; ++i)
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templateStrings[i] = (String)v.elementAt(i);
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}
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/**
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* A Prepared SQL query is executed and its ResultSet is returned
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*
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* @return a ResultSet that contains the data produced by the
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* query - never null
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* @exception SQLException if a database access error occurs
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*/
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public java.sql.ResultSet executeQuery() throws SQLException
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{
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StringBuffer s = new StringBuffer();
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int i;
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for (i = 0 ; i < inStrings.length ; ++i)
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{
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if (inStrings[i] == null)
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throw new PSQLException("postgresql.prep.param",new Integer(i + 1));
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s.append (templateStrings[i]);
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s.append (inStrings[i]);
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}
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s.append(templateStrings[inStrings.length]);
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return super.executeQuery(s.toString()); // in Statement class
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}
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/**
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* Execute a SQL INSERT, UPDATE or DELETE statement. In addition,
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* SQL statements that return nothing such as SQL DDL statements can
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* be executed.
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*
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* @return either the row count for INSERT, UPDATE or DELETE; or
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* 0 for SQL statements that return nothing.
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* @exception SQLException if a database access error occurs
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*/
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public int executeUpdate() throws SQLException
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{
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StringBuffer s = new StringBuffer();
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int i;
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for (i = 0 ; i < inStrings.length ; ++i)
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{
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if (inStrings[i] == null)
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throw new PSQLException("postgresql.prep.param",new Integer(i + 1));
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s.append (templateStrings[i]);
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s.append (inStrings[i]);
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}
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s.append(templateStrings[inStrings.length]);
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return super.executeUpdate(s.toString()); // in Statement class
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}
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/**
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* Set a parameter to SQL NULL
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*
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* <p><B>Note:</B> You must specify the parameters SQL type (although
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* PostgreSQL ignores it)
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*
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* @param parameterIndex the first parameter is 1, etc...
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* @param sqlType the SQL type code defined in java.sql.Types
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* @exception SQLException if a database access error occurs
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*/
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public void setNull(int parameterIndex, int sqlType) throws SQLException
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{
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set(parameterIndex, "null");
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}
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/**
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* Set a parameter to a Java boolean value. The driver converts this
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* to a SQL BIT value when it sends it to the database.
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*
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* @param parameterIndex the first parameter is 1...
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* @param x the parameter value
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* @exception SQLException if a database access error occurs
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*/
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public void setBoolean(int parameterIndex, boolean x) throws SQLException
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{
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set(parameterIndex, x ? "'t'" : "'f'");
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}
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/**
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* Set a parameter to a Java byte value. The driver converts this to
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* a SQL TINYINT value when it sends it to the database.
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*
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* @param parameterIndex the first parameter is 1...
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* @param x the parameter value
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* @exception SQLException if a database access error occurs
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*/
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public void setByte(int parameterIndex, byte x) throws SQLException
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{
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set(parameterIndex, (new Integer(x)).toString());
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}
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/**
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* Set a parameter to a Java short value. The driver converts this
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* to a SQL SMALLINT value when it sends it to the database.
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*
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* @param parameterIndex the first parameter is 1...
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* @param x the parameter value
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* @exception SQLException if a database access error occurs
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*/
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public void setShort(int parameterIndex, short x) throws SQLException
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{
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set(parameterIndex, (new Integer(x)).toString());
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}
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/**
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* Set a parameter to a Java int value. The driver converts this to
|
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* a SQL INTEGER value when it sends it to the database.
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||||
*
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* @param parameterIndex the first parameter is 1...
|
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* @param x the parameter value
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* @exception SQLException if a database access error occurs
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*/
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public void setInt(int parameterIndex, int x) throws SQLException
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{
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set(parameterIndex, (new Integer(x)).toString());
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}
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/**
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* Set a parameter to a Java long value. The driver converts this to
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* a SQL BIGINT value when it sends it to the database.
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*
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* @param parameterIndex the first parameter is 1...
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* @param x the parameter value
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||||
* @exception SQLException if a database access error occurs
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*/
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public void setLong(int parameterIndex, long x) throws SQLException
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{
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set(parameterIndex, (new Long(x)).toString());
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}
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/**
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||||
* Set a parameter to a Java float value. The driver converts this
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* to a SQL FLOAT value when it sends it to the database.
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*
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* @param parameterIndex the first parameter is 1...
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* @param x the parameter value
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* @exception SQLException if a database access error occurs
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||||
*/
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public void setFloat(int parameterIndex, float x) throws SQLException
|
||||
{
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set(parameterIndex, (new Float(x)).toString());
|
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}
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||||
|
||||
/**
|
||||
* Set a parameter to a Java double value. The driver converts this
|
||||
* to a SQL DOUBLE value when it sends it to the database
|
||||
*
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||||
* @param parameterIndex the first parameter is 1...
|
||||
* @param x the parameter value
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||||
* @exception SQLException if a database access error occurs
|
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*/
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public void setDouble(int parameterIndex, double x) throws SQLException
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{
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set(parameterIndex, (new Double(x)).toString());
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}
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||||
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/**
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* Set a parameter to a java.lang.BigDecimal value. The driver
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* converts this to a SQL NUMERIC value when it sends it to the
|
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* database.
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*
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||||
* @param parameterIndex the first parameter is 1...
|
||||
* @param x the parameter value
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* @exception SQLException if a database access error occurs
|
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*/
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public void setBigDecimal(int parameterIndex, BigDecimal x) throws SQLException
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{
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set(parameterIndex, x.toString());
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}
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|
||||
/**
|
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* Set a parameter to a Java String value. The driver converts this
|
||||
* to a SQL VARCHAR or LONGVARCHAR value (depending on the arguments
|
||||
* size relative to the driver's limits on VARCHARs) when it sends it
|
||||
* to the database.
|
||||
*
|
||||
* @param parameterIndex the first parameter is 1...
|
||||
* @param x the parameter value
|
||||
* @exception SQLException if a database access error occurs
|
||||
*/
|
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public void setString(int parameterIndex, String x) throws SQLException
|
||||
{
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// if the passed string is null, then set this column to null
|
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if(x==null)
|
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set(parameterIndex,"null");
|
||||
else {
|
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StringBuffer b = new StringBuffer();
|
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int i;
|
||||
|
||||
b.append('\'');
|
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for (i = 0 ; i < x.length() ; ++i)
|
||||
{
|
||||
char c = x.charAt(i);
|
||||
if (c == '\\' || c == '\'')
|
||||
b.append((char)'\\');
|
||||
b.append(c);
|
||||
}
|
||||
b.append('\'');
|
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set(parameterIndex, b.toString());
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Set a parameter to a Java array of bytes. The driver converts this
|
||||
* to a SQL VARBINARY or LONGVARBINARY (depending on the argument's
|
||||
* size relative to the driver's limits on VARBINARYs) when it sends
|
||||
* it to the database.
|
||||
*
|
||||
* <p>Implementation note:
|
||||
* <br>With org.postgresql, this creates a large object, and stores the
|
||||
* objects oid in this column.
|
||||
*
|
||||
* @param parameterIndex the first parameter is 1...
|
||||
* @param x the parameter value
|
||||
* @exception SQLException if a database access error occurs
|
||||
*/
|
||||
public void setBytes(int parameterIndex, byte x[]) throws SQLException
|
||||
{
|
||||
LargeObjectManager lom = connection.getLargeObjectAPI();
|
||||
int oid = lom.create();
|
||||
LargeObject lob = lom.open(oid);
|
||||
lob.write(x);
|
||||
lob.close();
|
||||
setInt(parameterIndex,oid);
|
||||
}
|
||||
|
||||
/**
|
||||
* Set a parameter to a java.sql.Date value. The driver converts this
|
||||
* to a SQL DATE value when it sends it to the database.
|
||||
*
|
||||
* @param parameterIndex the first parameter is 1...
|
||||
* @param x the parameter value
|
||||
* @exception SQLException if a database access error occurs
|
||||
*/
|
||||
public void setDate(int parameterIndex, java.sql.Date x) throws SQLException
|
||||
{
|
||||
SimpleDateFormat df = new SimpleDateFormat("''yyyy-MM-dd''");
|
||||
|
||||
set(parameterIndex, df.format(x));
|
||||
|
||||
// The above is how the date should be handled.
|
||||
//
|
||||
// However, in JDK's prior to 1.1.6 (confirmed with the
|
||||
// Linux jdk1.1.3 and the Win95 JRE1.1.5), SimpleDateFormat seems
|
||||
// to format a date to the previous day. So the fix is to add a day
|
||||
// before formatting.
|
||||
//
|
||||
// PS: 86400000 is one day
|
||||
//
|
||||
//set(parameterIndex, df.format(new java.util.Date(x.getTime()+86400000)));
|
||||
}
|
||||
|
||||
/**
|
||||
* Set a parameter to a java.sql.Time value. The driver converts
|
||||
* this to a SQL TIME value when it sends it to the database.
|
||||
*
|
||||
* @param parameterIndex the first parameter is 1...));
|
||||
* @param x the parameter value
|
||||
* @exception SQLException if a database access error occurs
|
||||
*/
|
||||
public void setTime(int parameterIndex, Time x) throws SQLException
|
||||
{
|
||||
set(parameterIndex, "'" + x.toString() + "'");
|
||||
}
|
||||
|
||||
/**
|
||||
* Set a parameter to a java.sql.Timestamp value. The driver converts
|
||||
* this to a SQL TIMESTAMP value when it sends it to the database.
|
||||
*
|
||||
* @param parameterIndex the first parameter is 1...
|
||||
* @param x the parameter value
|
||||
* @exception SQLException if a database access error occurs
|
||||
*/
|
||||
public void setTimestamp(int parameterIndex, Timestamp x) throws SQLException
|
||||
{
|
||||
set(parameterIndex, "'" + x.toString() + "'");
|
||||
}
|
||||
|
||||
/**
|
||||
* When a very large ASCII value is input to a LONGVARCHAR parameter,
|
||||
* it may be more practical to send it via a java.io.InputStream.
|
||||
* JDBC will read the data from the stream as needed, until it reaches
|
||||
* end-of-file. The JDBC driver will do any necessary conversion from
|
||||
* ASCII to the database char format.
|
||||
*
|
||||
* <P><B>Note:</B> This stream object can either be a standard Java
|
||||
* stream object or your own subclass that implements the standard
|
||||
* interface.
|
||||
*
|
||||
* @param parameterIndex the first parameter is 1...
|
||||
* @param x the parameter value
|
||||
* @param length the number of bytes in the stream
|
||||
* @exception SQLException if a database access error occurs
|
||||
*/
|
||||
public void setAsciiStream(int parameterIndex, InputStream x, int length) throws SQLException
|
||||
{
|
||||
setBinaryStream(parameterIndex, x, length);
|
||||
}
|
||||
|
||||
/**
|
||||
* When a very large Unicode value is input to a LONGVARCHAR parameter,
|
||||
* it may be more practical to send it via a java.io.InputStream.
|
||||
* JDBC will read the data from the stream as needed, until it reaches
|
||||
* end-of-file. The JDBC driver will do any necessary conversion from
|
||||
* UNICODE to the database char format.
|
||||
*
|
||||
* ** DEPRECIATED IN JDBC 2 **
|
||||
*
|
||||
* <P><B>Note:</B> This stream object can either be a standard Java
|
||||
* stream object or your own subclass that implements the standard
|
||||
* interface.
|
||||
*
|
||||
* @param parameterIndex the first parameter is 1...
|
||||
* @param x the parameter value
|
||||
* @exception SQLException if a database access error occurs
|
||||
* @deprecated
|
||||
*/
|
||||
public void setUnicodeStream(int parameterIndex, InputStream x, int length) throws SQLException
|
||||
{
|
||||
setBinaryStream(parameterIndex, x, length);
|
||||
}
|
||||
|
||||
/**
|
||||
* When a very large binary value is input to a LONGVARBINARY parameter,
|
||||
* it may be more practical to send it via a java.io.InputStream.
|
||||
* JDBC will read the data from the stream as needed, until it reaches
|
||||
* end-of-file.
|
||||
*
|
||||
* <P><B>Note:</B> This stream object can either be a standard Java
|
||||
* stream object or your own subclass that implements the standard
|
||||
* interface.
|
||||
*
|
||||
* @param parameterIndex the first parameter is 1...
|
||||
* @param x the parameter value
|
||||
* @exception SQLException if a database access error occurs
|
||||
*/
|
||||
public void setBinaryStream(int parameterIndex, InputStream x, int length) throws SQLException
|
||||
{
|
||||
throw new PSQLException("postgresql.prep.is");
|
||||
}
|
||||
|
||||
/**
|
||||
* In general, parameter values remain in force for repeated used of a
|
||||
* Statement. Setting a parameter value automatically clears its
|
||||
* previous value. However, in coms cases, it is useful to immediately
|
||||
* release the resources used by the current parameter values; this
|
||||
* can be done by calling clearParameters
|
||||
*
|
||||
* @exception SQLException if a database access error occurs
|
||||
*/
|
||||
public void clearParameters() throws SQLException
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0 ; i < inStrings.length ; i++)
|
||||
inStrings[i] = null;
|
||||
}
|
||||
|
||||
/**
|
||||
* Set the value of a parameter using an object; use the java.lang
|
||||
* equivalent objects for integral values.
|
||||
*
|
||||
* <P>The given Java object will be converted to the targetSqlType before
|
||||
* being sent to the database.
|
||||
*
|
||||
* <P>note that this method may be used to pass database-specific
|
||||
* abstract data types. This is done by using a Driver-specific
|
||||
* Java type and using a targetSqlType of java.sql.Types.OTHER
|
||||
*
|
||||
* @param parameterIndex the first parameter is 1...
|
||||
* @param x the object containing the input parameter value
|
||||
* @param targetSqlType The SQL type to be send to the database
|
||||
* @param scale For java.sql.Types.DECIMAL or java.sql.Types.NUMERIC
|
||||
* types this is the number of digits after the decimal. For
|
||||
* all other types this value will be ignored.
|
||||
* @exception SQLException if a database access error occurs
|
||||
*/
|
||||
public void setObject(int parameterIndex, Object x, int targetSqlType, int scale) throws SQLException
|
||||
{
|
||||
switch (targetSqlType)
|
||||
{
|
||||
case Types.TINYINT:
|
||||
case Types.SMALLINT:
|
||||
case Types.INTEGER:
|
||||
case Types.BIGINT:
|
||||
case Types.REAL:
|
||||
case Types.FLOAT:
|
||||
case Types.DOUBLE:
|
||||
case Types.DECIMAL:
|
||||
case Types.NUMERIC:
|
||||
if (x instanceof Boolean)
|
||||
set(parameterIndex, ((Boolean)x).booleanValue() ? "1" : "0");
|
||||
else
|
||||
set(parameterIndex, x.toString());
|
||||
break;
|
||||
case Types.CHAR:
|
||||
case Types.VARCHAR:
|
||||
case Types.LONGVARCHAR:
|
||||
setString(parameterIndex, x.toString());
|
||||
break;
|
||||
case Types.DATE:
|
||||
setDate(parameterIndex, (java.sql.Date)x);
|
||||
break;
|
||||
case Types.TIME:
|
||||
setTime(parameterIndex, (Time)x);
|
||||
break;
|
||||
case Types.TIMESTAMP:
|
||||
setTimestamp(parameterIndex, (Timestamp)x);
|
||||
break;
|
||||
case Types.OTHER:
|
||||
setString(parameterIndex, ((PGobject)x).getValue());
|
||||
break;
|
||||
default:
|
||||
throw new PSQLException("postgresql.prep.type");
|
||||
}
|
||||
}
|
||||
|
||||
public void setObject(int parameterIndex, Object x, int targetSqlType) throws SQLException
|
||||
{
|
||||
setObject(parameterIndex, x, targetSqlType, 0);
|
||||
}
|
||||
|
||||
/**
|
||||
* This stores an Object into a parameter.
|
||||
* <p>New for 6.4, if the object is not recognised, but it is
|
||||
* Serializable, then the object is serialised using the
|
||||
* org.postgresql.util.Serialize class.
|
||||
*/
|
||||
public void setObject(int parameterIndex, Object x) throws SQLException
|
||||
{
|
||||
if (x instanceof String)
|
||||
setString(parameterIndex, (String)x);
|
||||
else if (x instanceof BigDecimal)
|
||||
setBigDecimal(parameterIndex, (BigDecimal)x);
|
||||
else if (x instanceof Short)
|
||||
setShort(parameterIndex, ((Short)x).shortValue());
|
||||
else if (x instanceof Integer)
|
||||
setInt(parameterIndex, ((Integer)x).intValue());
|
||||
else if (x instanceof Long)
|
||||
setLong(parameterIndex, ((Long)x).longValue());
|
||||
else if (x instanceof Float)
|
||||
setFloat(parameterIndex, ((Float)x).floatValue());
|
||||
else if (x instanceof Double)
|
||||
setDouble(parameterIndex, ((Double)x).doubleValue());
|
||||
else if (x instanceof byte[])
|
||||
setBytes(parameterIndex, (byte[])x);
|
||||
else if (x instanceof java.sql.Date)
|
||||
setDate(parameterIndex, (java.sql.Date)x);
|
||||
else if (x instanceof Time)
|
||||
setTime(parameterIndex, (Time)x);
|
||||
else if (x instanceof Timestamp)
|
||||
setTimestamp(parameterIndex, (Timestamp)x);
|
||||
else if (x instanceof Boolean)
|
||||
setBoolean(parameterIndex, ((Boolean)x).booleanValue());
|
||||
else if (x instanceof PGobject)
|
||||
setString(parameterIndex, ((PGobject)x).getValue());
|
||||
else
|
||||
setLong(parameterIndex, connection.putObject(x));
|
||||
}
|
||||
|
||||
/**
|
||||
* Some prepared statements return multiple results; the execute method
|
||||
* handles these complex statements as well as the simpler form of
|
||||
* statements handled by executeQuery and executeUpdate
|
||||
*
|
||||
* @return true if the next result is a ResultSet; false if it is an
|
||||
* update count or there are no more results
|
||||
* @exception SQLException if a database access error occurs
|
||||
*/
|
||||
public boolean execute() throws SQLException
|
||||
{
|
||||
StringBuffer s = new StringBuffer();
|
||||
int i;
|
||||
|
||||
for (i = 0 ; i < inStrings.length ; ++i)
|
||||
{
|
||||
if (inStrings[i] == null)
|
||||
throw new PSQLException("postgresql.prep.param",new Integer(i + 1));
|
||||
s.append (templateStrings[i]);
|
||||
s.append (inStrings[i]);
|
||||
}
|
||||
s.append(templateStrings[inStrings.length]);
|
||||
return super.execute(s.toString()); // in Statement class
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the SQL statement with the current template values
|
||||
* substituted.
|
||||
*/
|
||||
public String toString() {
|
||||
StringBuffer s = new StringBuffer();
|
||||
int i;
|
||||
|
||||
for (i = 0 ; i < inStrings.length ; ++i)
|
||||
{
|
||||
if (inStrings[i] == null)
|
||||
s.append( '?' );
|
||||
else
|
||||
s.append (templateStrings[i]);
|
||||
s.append (inStrings[i]);
|
||||
}
|
||||
s.append(templateStrings[inStrings.length]);
|
||||
return s.toString();
|
||||
}
|
||||
|
||||
// **************************************************************
|
||||
// END OF PUBLIC INTERFACE
|
||||
// **************************************************************
|
||||
|
||||
/**
|
||||
* There are a lot of setXXX classes which all basically do
|
||||
* the same thing. We need a method which actually does the
|
||||
* set for us.
|
||||
*
|
||||
* @param paramIndex the index into the inString
|
||||
* @param s a string to be stored
|
||||
* @exception SQLException if something goes wrong
|
||||
*/
|
||||
private void set(int paramIndex, String s) throws SQLException
|
||||
{
|
||||
if (paramIndex < 1 || paramIndex > inStrings.length)
|
||||
throw new PSQLException("postgresql.prep.range");
|
||||
inStrings[paramIndex - 1] = s;
|
||||
}
|
||||
|
||||
// ** JDBC 2 Extensions **
|
||||
|
||||
public void addBatch() throws SQLException
|
||||
{
|
||||
throw org.postgresql.Driver.notImplemented();
|
||||
}
|
||||
|
||||
public java.sql.ResultSetMetaData getMetaData() throws SQLException
|
||||
{
|
||||
throw org.postgresql.Driver.notImplemented();
|
||||
}
|
||||
|
||||
public void setArray(int i,Array x) throws SQLException
|
||||
{
|
||||
throw org.postgresql.Driver.notImplemented();
|
||||
}
|
||||
|
||||
public void setBlob(int i,Blob x) throws SQLException
|
||||
{
|
||||
throw org.postgresql.Driver.notImplemented();
|
||||
}
|
||||
|
||||
public void setCharacterStream(int i,java.io.Reader x,int length) throws SQLException
|
||||
{
|
||||
throw org.postgresql.Driver.notImplemented();
|
||||
}
|
||||
|
||||
public void setClob(int i,Clob x) throws SQLException
|
||||
{
|
||||
throw org.postgresql.Driver.notImplemented();
|
||||
}
|
||||
|
||||
public void setNull(int i,int t,String s) throws SQLException
|
||||
{
|
||||
throw org.postgresql.Driver.notImplemented();
|
||||
}
|
||||
|
||||
public void setRef(int i,Ref x) throws SQLException
|
||||
{
|
||||
throw org.postgresql.Driver.notImplemented();
|
||||
}
|
||||
|
||||
public void setDate(int i,java.sql.Date d,java.util.Calendar cal) throws SQLException
|
||||
{
|
||||
throw org.postgresql.Driver.notImplemented();
|
||||
}
|
||||
|
||||
public void setTime(int i,Time t,java.util.Calendar cal) throws SQLException
|
||||
{
|
||||
throw org.postgresql.Driver.notImplemented();
|
||||
}
|
||||
|
||||
public void setTimestamp(int i,Timestamp t,java.util.Calendar cal) throws SQLException
|
||||
{
|
||||
throw org.postgresql.Driver.notImplemented();
|
||||
}
|
||||
|
||||
}
|
||||
Reference in New Issue
Block a user