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org.sqlite.PrepStmt Maven / Gradle / Ivy
/*
* Copyright (c) 2007 David Crawshaw
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package org.sqlite;
import java.io.IOException;
import java.io.Reader;
import java.sql.Date;
import java.sql.ParameterMetaData;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import java.sql.Time;
import java.sql.Timestamp;
import java.sql.Types;
import java.util.Calendar;
final class PrepStmt extends Stmt implements PreparedStatement, ParameterMetaData, Codes
{
private int columnCount;
private int paramCount;
PrepStmt(Conn conn, String sql) throws SQLException {
super(conn);
this.sql = sql;
db.prepare(this);
rs.colsMeta = db.column_names(pointer);
columnCount = db.column_count(pointer);
paramCount = db.bind_parameter_count(pointer);
batch = new Object[paramCount];
batchPos = 0;
}
public void clearParameters() throws SQLException {
checkOpen();
db.reset(pointer);
clearBatch();
}
@Override
protected void finalize() throws SQLException {
close();
}
public boolean execute() throws SQLException {
checkOpen();
rs.close();
db.reset(pointer);
resultsWaiting = db.execute(this, batch);
return columnCount != 0;
}
public ResultSet executeQuery() throws SQLException {
checkOpen();
if (columnCount == 0)
throw new SQLException("query does not return results");
rs.close();
db.reset(pointer);
resultsWaiting = db.execute(this, batch);
return getResultSet();
}
public int executeUpdate() throws SQLException {
checkOpen();
if (columnCount != 0)
throw new SQLException("query returns results");
rs.close();
db.reset(pointer);
return db.executeUpdate(this, batch);
}
@Override
public int[] executeBatch() throws SQLException {
if (batchPos == 0)
return new int[] {};
try {
return db.executeBatch(pointer, batchPos / paramCount, batch);
}
finally {
clearBatch();
}
}
@Override
public int getUpdateCount() throws SQLException {
checkOpen();
if (pointer == 0 || resultsWaiting)
return -1;
return db.changes();
}
public void addBatch() throws SQLException {
checkOpen();
batchPos += paramCount;
if (batchPos + paramCount > batch.length) {
Object[] nb = new Object[batch.length * 2];
System.arraycopy(batch, 0, nb, 0, batch.length);
batch = nb;
}
System.arraycopy(batch, batchPos - paramCount, batch, batchPos, paramCount);
}
// ParameterMetaData FUNCTIONS //////////////////////////////////
public ParameterMetaData getParameterMetaData() {
return this;
}
public int getParameterCount() throws SQLException {
checkOpen();
return paramCount;
}
public String getParameterClassName(int param) throws SQLException {
checkOpen();
return "java.lang.String";
}
public String getParameterTypeName(int pos) {
return "VARCHAR";
}
public int getParameterType(int pos) {
return Types.VARCHAR;
}
public int getParameterMode(int pos) {
return parameterModeIn;
}
public int getPrecision(int pos) {
return 0;
}
public int getScale(int pos) {
return 0;
}
public int isNullable(int pos) {
return parameterNullable;
}
public boolean isSigned(int pos) {
return true;
}
public Statement getStatement() {
return this;
}
// PARAMETER FUNCTIONS //////////////////////////////////////////
private void batch(int pos, Object value) throws SQLException {
checkOpen();
if (batch == null)
batch = new Object[paramCount];
batch[batchPos + pos - 1] = value;
}
public void setBoolean(int pos, boolean value) throws SQLException {
setInt(pos, value ? 1 : 0);
}
public void setByte(int pos, byte value) throws SQLException {
setInt(pos, value);
}
public void setBytes(int pos, byte[] value) throws SQLException {
batch(pos, value);
}
public void setDouble(int pos, double value) throws SQLException {
batch(pos, new Double(value));
}
public void setFloat(int pos, float value) throws SQLException {
batch(pos, new Float(value));
}
public void setInt(int pos, int value) throws SQLException {
batch(pos, new Integer(value));
}
public void setLong(int pos, long value) throws SQLException {
batch(pos, new Long(value));
}
public void setNull(int pos, int u1) throws SQLException {
setNull(pos, u1, null);
}
public void setNull(int pos, int u1, String u2) throws SQLException {
batch(pos, null);
}
public void setObject(int pos, Object value) throws SQLException {
if (value == null)
batch(pos, null);
else if (value instanceof java.util.Date)
batch(pos, new Long(((java.util.Date) value).getTime()));
else if (value instanceof Date)
batch(pos, new Long(((Date) value).getTime()));
else if (value instanceof Time)
batch(pos, new Long(((Time) value).getTime()));
else if (value instanceof Timestamp)
batch(pos, new Long(((Timestamp) value).getTime()));
else if (value instanceof Long)
batch(pos, value);
else if (value instanceof Integer)
batch(pos, value);
else if (value instanceof Short)
batch(pos, new Integer(((Short) value).intValue()));
else if (value instanceof Float)
batch(pos, value);
else if (value instanceof Double)
batch(pos, value);
else if (value instanceof Boolean)
setBoolean(pos, ((Boolean) value).booleanValue());
else if (value instanceof byte[])
batch(pos, value);
else
batch(pos, value.toString());
}
public void setObject(int p, Object v, int t) throws SQLException {
setObject(p, v);
}
public void setObject(int p, Object v, int t, int s) throws SQLException {
setObject(p, v);
}
public void setShort(int pos, short value) throws SQLException {
setInt(pos, value);
}
public void setString(int pos, String value) throws SQLException {
batch(pos, value);
}
public void setCharacterStream(int pos, Reader reader, int length) throws SQLException {
try {
// copy chars from reader to StringBuffer
StringBuffer sb = new StringBuffer();
char[] cbuf = new char[8192];
int cnt;
while ((cnt = reader.read(cbuf)) > 0) {
sb.append(cbuf, 0, cnt);
}
// set as string
setString(pos, sb.toString());
}
catch (IOException e) {
throw new SQLException("Cannot read from character stream, exception message: " + e.getMessage());
}
}
public void setDate(int pos, Date x) throws SQLException {
setObject(pos, x);
}
public void setDate(int pos, Date x, Calendar cal) throws SQLException {
setObject(pos, x);
}
public void setTime(int pos, Time x) throws SQLException {
setObject(pos, x);
}
public void setTime(int pos, Time x, Calendar cal) throws SQLException {
setObject(pos, x);
}
public void setTimestamp(int pos, Timestamp x) throws SQLException {
setObject(pos, x);
}
public void setTimestamp(int pos, Timestamp x, Calendar cal) throws SQLException {
setObject(pos, x);
}
public ResultSetMetaData getMetaData() throws SQLException {
checkOpen();
return rs;
}
// UNUSED ///////////////////////////////////////////////////////
@Override
public boolean execute(String sql) throws SQLException {
throw unused();
}
@Override
public int executeUpdate(String sql) throws SQLException {
throw unused();
}
@Override
public ResultSet executeQuery(String sql) throws SQLException {
throw unused();
}
@Override
public void addBatch(String sql) throws SQLException {
throw unused();
}
private SQLException unused() {
return new SQLException("not supported by PreparedStatment");
}
}
