sascha@4073: package de.intevation.db; sascha@4073: sascha@4073: import java.util.List; sascha@4073: import java.util.ArrayList; sascha@4073: import java.util.Map; sascha@4073: import java.util.HashMap; sascha@4073: sascha@4073: import java.util.regex.Matcher; sascha@4073: import java.util.regex.Pattern; sascha@4073: sascha@4073: import java.sql.Connection; sascha@4073: import java.sql.SQLException; sascha@4073: import java.sql.PreparedStatement; sascha@4073: import java.sql.Timestamp; sascha@4075: import java.sql.ResultSet; sascha@4073: sascha@4073: import org.apache.log4j.Logger; sascha@4073: sascha@4073: public class SymbolicStatement { sascha@4073: sascha@4073: private static Logger log = Logger.getLogger(SymbolicStatement.class); sascha@4073: sascha@4073: public static final Pattern VAR = Pattern.compile(":([a-zA-Z0-9_]+)"); sascha@4073: sascha@4073: protected String statement; sascha@4073: protected String compiled; sascha@4073: protected Map> positions; sascha@4073: sascha@4073: public class Instance { sascha@4073: sascha@4073: /** TODO: Support more types. */ sascha@4073: sascha@4073: protected PreparedStatement stmnt; sascha@4073: sascha@4073: public Instance(Connection connection) throws SQLException { sascha@4073: stmnt = connection.prepareStatement(compiled); sascha@4073: } sascha@4073: sascha@4073: public void close() { sascha@4073: try { sascha@4073: stmnt.close(); sascha@4073: } sascha@4073: catch (SQLException sqle) { sascha@4073: log.error("cannot close statement", sqle); sascha@4073: } sascha@4073: } sascha@4073: sascha@4076: public Instance setInt(String key, int value) sascha@4073: throws SQLException sascha@4073: { sascha@4073: List pos = positions.get(key.toLowerCase()); sascha@4073: if (pos != null) { sascha@4073: for (Integer p: pos) { sascha@4073: stmnt.setInt(p, value); sascha@4073: } sascha@4073: } sascha@4076: sascha@4076: return this; sascha@4073: } sascha@4073: sascha@4076: public Instance setString(String key, String value) sascha@4073: throws SQLException sascha@4073: { sascha@4073: List pos = positions.get(key.toLowerCase()); sascha@4073: if (pos != null) { sascha@4073: for (Integer p: pos) { sascha@4073: stmnt.setString(p, value); sascha@4073: } sascha@4073: } sascha@4076: return this; sascha@4073: } sascha@4073: sascha@4076: public Instance setObject(String key, Object value) sascha@4073: throws SQLException sascha@4073: { sascha@4073: List pos = positions.get(key.toLowerCase()); sascha@4073: if (pos != null) { sascha@4073: for (Integer p: pos) { sascha@4073: stmnt.setObject(p, value); sascha@4073: } sascha@4073: } sascha@4076: return this; sascha@4073: } sascha@4073: sascha@4076: public Instance setTimestamp(String key, Timestamp value) sascha@4073: throws SQLException sascha@4073: { sascha@4073: List pos = positions.get(key.toLowerCase()); sascha@4073: if (pos != null) { sascha@4073: for (Integer p: pos) { sascha@4073: stmnt.setTimestamp(p, value); sascha@4073: } sascha@4073: } sascha@4076: return this; sascha@4073: } sascha@4073: sascha@4076: public Instance setDouble(String key, int value) sascha@4073: throws SQLException sascha@4073: { sascha@4073: List pos = positions.get(key.toLowerCase()); sascha@4073: if (pos != null) { sascha@4073: for (Integer p: pos) { sascha@4073: stmnt.setDouble(p, value); sascha@4073: } sascha@4073: } sascha@4076: return this; sascha@4073: } sascha@4073: sascha@4076: public Instance setNull(String key, int sqlType) sascha@4073: throws SQLException sascha@4073: { sascha@4073: List pos = positions.get(key.toLowerCase()); sascha@4073: if (pos != null) { sascha@4073: for (Integer p: pos) { sascha@4073: stmnt.setNull(p, sqlType); sascha@4073: } sascha@4073: } sascha@4076: return this; sascha@4073: } sascha@4073: sascha@4076: public Instance set(Map map) throws SQLException { sascha@4073: for (Map.Entry entry: map.entrySet()) { sascha@4073: setObject(entry.getKey(), entry.getValue()); sascha@4073: } sascha@4076: return this; sascha@4073: } sascha@4073: sascha@4076: public Instance clearParameters() throws SQLException { sascha@4073: stmnt.clearParameters(); sascha@4076: return this; sascha@4073: } sascha@4073: sascha@4075: public boolean execute() throws SQLException { sascha@4075: return stmnt.execute(); sascha@4075: } sascha@4075: sascha@4075: public ResultSet executeQuery() throws SQLException { sascha@4075: return stmnt.executeQuery(); sascha@4075: } sascha@4075: sascha@4075: public int executeUpdate() throws SQLException { sascha@4075: return stmnt.executeUpdate(); sascha@4075: } sascha@4075: sascha@4073: } // class Instance sascha@4073: sascha@4073: public SymbolicStatement(String statement) { sascha@4073: this.statement = statement; sascha@4073: compile(); sascha@4073: } sascha@4073: sascha@4073: public String getStatement() { sascha@4073: return statement; sascha@4073: } sascha@4073: sascha@4073: protected void compile() { sascha@4073: positions = new HashMap>(); sascha@4073: sascha@4073: StringBuffer sb = new StringBuffer(); sascha@4073: Matcher m = VAR.matcher(statement); sascha@4073: int index = 1; sascha@4073: while (m.find()) { sascha@4073: String key = m.group(1).toLowerCase(); sascha@4073: List list = positions.get(key); sascha@4073: if (list == null) { sascha@4073: list = new ArrayList(); sascha@4073: positions.put(key, list); sascha@4073: } sascha@4073: list.add(index++); sascha@4073: m.appendReplacement(sb, "?"); sascha@4073: } sascha@4073: m.appendTail(sb); sascha@4073: compiled = sb.toString(); sascha@4073: } sascha@4073: } // class SymbolicStatement