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package com.srv.hibernate;
import java.io.Serializable;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java. Properties;
import org.hibernate.HibernateException;
import org.hibernate.MappingException;
import org.hibernate.dialect.Dialect;
import org.hibernate.engine.SessionImplementor;
import org.hibernate.exception.JDBCExceptionHelper;
import org.hibernate.id.Configurable;
import org.hibernate.id.IdentifierGenerator;
import org.hibernate.id.PersistentIdentifierGenerator;
import org.hibernate.jdbc.Batcher;
import org.hibernate.mapping.Table;
import org.hibernate.type.Type;
import org.hibernate. StringHelper;
public class IardGenerator implements IdentifierGenerator, Configurable {
private String next;
private String sql;// = "select max(ID) from NOYP_BRANCHE";
private String prefixe = null;
private int tail = 0;
private String col;
public synchronized Serializable generate(SessionImplementor session,
Object object) throws HibernateException {
String[] tmp = getPrefixe(object).split("#");
prefixe = tmp[0];
if (tmp.length > 1)
tail = Integer.parseInt(tmp[1]);
if (sql != null) {
getNext(session);
}
System.err.println("GENERATION de l'object " + object.toString()
+ " cle=" + next);
return next;
}
public void configure(Type type, Properties params, Dialect dialect)
throws MappingException {
// obtention du nom de la table
String tableList = params.getProperty("tables");
if (tableList == null)
tableList = params
.getProperty(PersistentIdentifierGenerator.TABLES);
// liste de toutes les tables
String[] tables = StringHelper.split(", ", tableList);
// recherche de la colonne
String column = params.getProperty("column");
if (column == null)
column = params.getProperty(PersistentIdentifierGenerator.PK);
// recherche du schema
String schema = params
.getProperty(PersistentIdentifierGenerator.SCHEMA);
// recherche du catalogue
String catalog = params
.getProperty(PersistentIdentifierGenerator.CATALOG);
StringBuffer buf = new StringBuffer();
for (int i = 0; i < tables.length; i++) {
if (tables.length > 1) {
buf.append("select ").append(column).append(" from ");
}
buf.append(Table.qualify(catalog, schema, tables[i]));
if (i < tables.length - 1)
buf.append(" union ");
}
if (tables.length > 1) {
buf.insert(0, "( ").append(" ) ids_");
column = "ids_." + column;
}
sql = "select max(" + column + ") from " + buf.toString();
col = column;
System.err.println("REQUETTE= " + sql);
}
private void getNext(SessionImplementor session) {
try {
StringBuffer buf = new StringBuffer();
buf.append(sql).append(" where ").append(col).append(" like '").append(prefixe).append("%'");
System.err.println("REQUETTE A EXE = " + buf.toString());
Batcher bc = session.getBatcher();
PreparedStatement st = bc.prepareSelectStatement(
buf.toString());
try {
ResultSet rs = bc.getResultSet(st);//st.executeQuery();
try {
if (rs.next()) {
// next = rs.getLong(1) + 1;
try {
String ret = rs.getString(1);
long val = Long.parseLong(ret.substring(ret.indexOf(prefixe)+prefixe.length()));
val++;
next = prefixe + completer(tail, val);
} catch (Exception e) {
next = prefixe + completer(tail, 1);
}
if (rs.wasNull()) {
next = prefixe + completer(tail, 1);
}
} else {
next = prefixe + completer(tail, 1);
}
// sql = null;
// log.debug("first free id: " + next);
} finally {
rs.close();
}
} finally {
session.getBatcher().closeStatement(st);
}
} catch (SQLException sqle) {
throw JDBCExceptionHelper.convert(session.getFactory()
.getSQLExceptionConverter(), sqle,
"could not fetch initial value for increment generator",
sql);
}
}
public static String completer(int tail,long val) {
System.err.println("ON COMPLETTE= "+val);
StringBuffer buf = new StringBuffer();
//buf.append(patern);
buf.append("0000000000000000000").append(Long.toString(val));
buf.substring(buf.length() - tail, buf.length());
return buf.substring(buf.length() - tail, buf.length());
}
public static String getPrefixe(Object obj){
if(obj instanceof Client){
return "CLI#10";
}
if(obj instanceof ContactClient){
StringBuffer buf = new StringBuffer();
buf.append(((ContactClient)obj).getClient()
.getId()).append("#2");
return buf.toString();
}
return "0#0";
}
} |
ID-generator et many-to-one
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