From 3bf5221ecb15a8ed5caecfe92bb3e0c111107949 Mon Sep 17 00:00:00 2001
From: ulrich
Date: Mon, 22 Jan 2024 14:04:53 +0000
Subject: [PATCH] Kommentare ergaenzt
---
src/de/uhilger/baselink/PersistenceManager.java | 492 ++++-------------------------------------------------
1 files changed, 43 insertions(+), 449 deletions(-)
diff --git a/src/de/uhilger/baselink/PersistenceManager.java b/src/de/uhilger/baselink/PersistenceManager.java
index bd7ce34..c11ec96 100644
--- a/src/de/uhilger/baselink/PersistenceManager.java
+++ b/src/de/uhilger/baselink/PersistenceManager.java
@@ -17,19 +17,14 @@
*/
package de.uhilger.baselink;
-import java.sql.Blob;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
-import java.sql.ResultSetMetaData;
-import java.sql.SQLException;
+ import java.sql.SQLException;
import java.sql.Statement;
-import java.sql.Types;
-import java.util.ArrayList;
import java.util.List;
import java.util.Map;
-import java.util.TreeMap;
import java.util.logging.Level;
import java.util.logging.Logger;
@@ -121,6 +116,7 @@
* @throws NamingException when JNDI lookup fails
*/
public void setDataSourceName(String dataSourceName) throws NamingException {
+ logger.finest(dataSourceName);
Context initCtx = new InitialContext();
Context envCtx = (Context) initCtx.lookup("java:comp/env");
ds = (DataSource) envCtx.lookup(dataSourceName);
@@ -129,20 +125,23 @@
/**
* Get a database connection
* @return a database connection
- * @throws SQLException
*/
public Connection getConnection() {
Connection c = null;
try {
if (dburl != null) {
+ logger.finest("getting Connection for URL " + dburl);
c = DriverManager.getConnection(dburl);
} else if(ds != null) {
+ logger.finest("getting Connection for DataSource " + ds.toString());
c = ds.getConnection();
} else {
//throw new SQLException("Unable to get connection, DataSource and database URL are null.");
+ logger.finest("Unable to get connection, DataSource and database URL are null.");
}
} catch(Exception ex) {
- ex.printStackTrace();
+ //ex.printStackTrace();
+ logger.log(Level.FINEST, ex.getLocalizedMessage(), ex);
}
return c;
}
@@ -162,7 +161,7 @@
* @return the deleted object
*/
public Object delete(Object o) {
- return delete(o, new GenericRecord(o.getClass()));
+ return new Eraser(this).delete(o, new GenericRecord(o.getClass()));
}
/**
@@ -179,7 +178,7 @@
* @return the deleted object
*/
public Object delete(Connection c, Object o) {
- return delete(c, o, new GenericRecord(o.getClass()));
+ return new Eraser(this).delete(c, o, new GenericRecord(o.getClass()));
}
/**
@@ -189,18 +188,7 @@
* @return the deleted object
*/
public Object delete(Object o, Record record) {
- Connection c = null;
- try {
- c = getConnection();
- o = delete(c, o, record);
- c.close();
- c = null;
- } catch (Exception ex) {
- logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex);
- } finally {
- closeConnectionFinally(c);
- }
- return o;
+ return new Eraser(this).delete(o, record);
}
/**
@@ -211,20 +199,7 @@
* @return the deleted object
*/
public Object delete(Connection c, Object o, Record record) {
- Object deletedObject = null;
- PreparedStatement ps = null;
- try {
- ps = record.getDeleteStatment(c, o);
- ps.executeUpdate();
- ps.close();
- ps = null;
- deletedObject = o;
- } catch (Exception ex) {
- logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex);
- } finally {
- closeStatementFinally(ps);
- }
- return deletedObject;
+ return new Eraser(this).delete(c, o, record);
}
/* ---------------------- inserts -------------------- */
@@ -242,7 +217,7 @@
* @return the added object
*/
public Object insert(Object o) {
- return insert(o, new GenericRecord(o.getClass()));
+ return new Inserter(this).insert(o, new GenericRecord(o.getClass()));
}
/**
@@ -259,7 +234,7 @@
* @return the object added to the database
*/
public Object insert(Connection c, Object o) {
- return insert(c, o, new GenericRecord(o.getClass()));
+ return new Inserter(this).insert(c, o, new GenericRecord(o.getClass()));
}
/**
@@ -269,18 +244,7 @@
* @return the added object
*/
public Object insert(Object o, Record record) {
- Connection c = null;
- try {
- c = getConnection();
- o = insert(c, o, record);
- c.close();
- c = null;
- } catch (Exception ex) {
- logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex);
- } finally {
- closeConnectionFinally(c);
- }
- return o;
+ return new Inserter(this).insert(o, record);
}
/**
@@ -291,20 +255,7 @@
* @return the object that was added
*/
public Object insert(Connection c, Object o, Record record) {
- Object addedObject = null;
- PreparedStatement ps = null;
- try {
- ps = record.getInsertStatment(c, o);
- ps.executeUpdate();
- ps.close();
- ps = null;
- addedObject = o;
- } catch (Exception ex) {
- logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex);
- } finally {
- closeStatementFinally(ps);
- }
- return addedObject;
+ return new Inserter(this).insert(c, o, record);
}
/* --------------------------------- updates --------------------- */
@@ -322,7 +273,7 @@
* @return the object that was updated
*/
public Object update(Object o) {
- return update(o, new GenericRecord(o.getClass()));
+ return new Updater(this).update(o, new GenericRecord(o.getClass()));
}
/**
@@ -339,7 +290,7 @@
* @return the object that was updated
*/
public Object update(Connection c, Object o) {
- return update(c, o, new GenericRecord(o.getClass()));
+ return new Updater(this).update(c, o, new GenericRecord(o.getClass()));
}
/**
@@ -349,18 +300,7 @@
* @return the object that was updated
*/
public Object update(Object o, Record record) {
- Connection c = null;
- try {
- c = getConnection();
- o = update(c, o, record);
- c.close();
- c = null;
- } catch (Exception ex) {
- logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex);
- } finally {
- closeConnectionFinally(c);
- }
- return o;
+ return new Updater(this).update(o, record);
}
/**
@@ -371,20 +311,7 @@
* @return the object that was updated
*/
public Object update(Connection c, Object o, Record record) {
- Object updatedObject = null;
- PreparedStatement ps = null;
- try {
- ps = record.getUpdateStatment(c, o);
- ps.executeUpdate();
- ps.close();
- ps = null;
- updatedObject = o;
- } catch (Exception ex) {
- logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex);
- } finally {
- closeStatementFinally(ps);
- }
- return updatedObject;
+ return new Updater(this).update(c, o, record);
}
/* --------------- selects ---------------- */
@@ -396,7 +323,7 @@
* @return a list of objects that match the given query
*/
public List<Object> select(String sql, Record record) {
- return select(sql, record, Record.WITH_BLOBS);
+ return new Selector(this).select(sql, record, Record.WITH_BLOBS);
}
/**
@@ -407,19 +334,7 @@
* @return a list of objects that match the given query
*/
public List<Object> select(String sql, Record record, boolean includeBlobs) {
- Connection c = null;
- ArrayList<Object> list = new ArrayList<Object>();
- try {
- c = getConnection();
- list = (ArrayList<Object>) select(c, sql, record, includeBlobs);
- c.close();
- c = null;
- } catch (Exception ex) {
- logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex);
- } finally {
- closeConnectionFinally(c);
- }
- return list;
+ return new Selector(this).select(sql, record, includeBlobs);
}
/**
@@ -431,19 +346,7 @@
* @return a list of objects that match the given query
*/
public List<Object> select(String sql, Record record, boolean includeBlobs, Object... params) {
- Connection c = null;
- ArrayList<Object> list = new ArrayList<Object>();
- try {
- c = getConnection();
- list = (ArrayList<Object>) select(c, sql, record, includeBlobs, params);
- c.close();
- c = null;
- } catch (Exception ex) {
- logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex);
- } finally {
- closeConnectionFinally(c);
- }
- return list;
+ return new Selector(this).select(sql, record, includeBlobs, params);
}
/**
@@ -455,29 +358,7 @@
* @return a list of objects that match the given query
*/
public List<Object> select(Connection c, String sql, Record record, boolean includeBlobs) {
- PreparedStatement ps = null;
- ResultSet rs = null;
- ArrayList<Object> list = new ArrayList<Object>();
- try {
- ps = c.prepareStatement(sql, ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
- rs = ps.executeQuery();
- if (rs.first()) {
- while (!rs.isAfterLast()) {
- list.add(record.toObject(rs, includeBlobs));
- rs.next();
- }
- }
- rs.close();
- rs = null;
- ps.close();
- ps = null;
- } catch (Exception ex) {
- logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex);
- } finally {
- closeResultSetFinally(rs);
- closeStatementFinally(ps);
- }
- return list;
+ return new Selector(this).select(c, sql, record, includeBlobs);
}
/**
@@ -490,32 +371,8 @@
* @return a list of objects that match the given query
*/
public List<Object> select(Connection c, String sql, Record record, boolean includeBlobs, Object... params) {
- PreparedStatement ps = null;
- ResultSet rs = null;
- ArrayList<Object> list = new ArrayList<Object>();
- try {
- //ps = c.prepareStatement(sql, ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
- ps = buildQuery(c, sql, params);
- rs = ps.executeQuery();
- if (rs.first()) {
- while (!rs.isAfterLast()) {
- list.add(record.toObject(rs, includeBlobs));
- rs.next();
- }
- }
- rs.close();
- rs = null;
- ps.close();
- ps = null;
- } catch (Exception ex) {
- logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex);
- } finally {
- closeResultSetFinally(rs);
- closeStatementFinally(ps);
- }
- return list;
+ return new Selector(this).select(c, sql, record, includeBlobs, params);
}
-
/**
* Select a list of objects that match a given SQL statement
@@ -524,20 +381,7 @@
* list can be accessed with list.get(recordno).get("fieldname")
*/
public List<Map<String, Object>> select(String sql) {
- //Logger.getLogger(Logger.GLOBAL_LOGGER_NAME).finest(sql);
- Connection c = null;
- List<Map<String, Object>> list = null;
- try {
- c = getConnection();
- list = select(c, sql);
- c.close();
- c = null;
- } catch (Exception ex) {
- logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex);
- } finally {
- closeConnectionFinally(c);
- }
- return list;
+ return new Selector(this).select(sql);
}
/**
@@ -548,19 +392,7 @@
* list can be accessed with list.get(recordno).get(fieldno), each element is of type String
*/
public List<List<String>> select(String sql, boolean includeBlobs) {
- Connection c = null;
- List<List<String>> list = null;
- try {
- c = getConnection();
- list = select(c, sql, includeBlobs);
- c.close();
- c = null;
- } catch (Exception ex) {
- logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex);
- } finally {
- closeConnectionFinally(c);
- }
- return list;
+ return new Selector(this).select(sql, includeBlobs);
}
/**
@@ -571,24 +403,7 @@
* list can be accessed with list.get(recordno).get("fieldname")
*/
public List<Map<String, Object>> select(Connection c, String sql) {
- PreparedStatement ps = null;
- ResultSet rs = null;
- List<Map<String, Object>> list = null;
- try {
- ps = c.prepareStatement(sql, ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
- rs = ps.executeQuery();
- list = toList(rs);
- rs.close();
- rs = null;
- ps.close();
- ps = null;
- } catch (Exception ex) {
- logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex);
- } finally {
- closeResultSetFinally(rs);
- closeStatementFinally(ps);
- }
- return list;
+ return new Selector(this).select(c, sql);
}
/**
@@ -600,24 +415,7 @@
* list can be accessed with list.get(recordno).get(fieldno), each element is of type String
*/
public List<List<String>> select(Connection c, String sql, boolean includeBlobs) {
- PreparedStatement ps = null;
- ResultSet rs = null;
- List<List<String>> list = null;
- try {
- ps = c.prepareStatement(sql, ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
- rs = ps.executeQuery();
- list = toList(rs, includeBlobs);
- rs.close();
- rs = null;
- ps.close();
- ps = null;
- } catch (Exception ex) {
- logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex);
- } finally {
- closeResultSetFinally(rs);
- closeStatementFinally(ps);
- }
- return list;
+ return new Selector(this).select(c, sql, includeBlobs);
}
/**
@@ -629,19 +427,7 @@
* list can be accessed with list.get(recordno).get(fieldno), each element is of type String
*/
public List<List<String>> select(String sql, boolean includeBlobs, Object... params) {
- Connection c = null;
- List<List<String>> list = null;
- try {
- c = getConnection();
- list = select(c, sql, includeBlobs, params);
- c.close();
- c = null;
- } catch (Exception ex) {
- logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex);
- } finally {
- closeConnectionFinally(c);
- }
- return list;
+ return new Selector(this).select(sql, includeBlobs, params);
}
/**
@@ -654,24 +440,7 @@
* list can be accessed with list.get(recordno).get(fieldno), each element is of type String
*/
public List<List<String>> select(Connection c, String sql, boolean includeBlobs, Object... params) {
- PreparedStatement ps = null;
- ResultSet rs = null;
- List<List<String>> list = null;
- try {
- ps = buildQuery(c, sql, params);
- rs = ps.executeQuery();
- list = toList(rs, includeBlobs);
- rs.close();
- rs = null;
- ps.close();
- ps = null;
- } catch (Exception ex) {
- logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex);
- } finally {
- closeResultSetFinally(rs);
- closeStatementFinally(ps);
- }
- return list;
+ return new Selector(this).select(c, sql, includeBlobs, params);
}
/* ------------------ generic SQL execution ---------- */
@@ -682,19 +451,7 @@
* @return a list of generated keys
*/
public List<Map<String, Object>> executeWithKeys(String sql) {
- List<Map<String, Object>> keys = null;
- Connection c = null;
- try {
- c = getConnection();
- keys = executeWithKeys(c, sql);
- c.close();
- c = null;
- } catch (Exception ex) {
- logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex);
- } finally {
- closeConnectionFinally(c);
- }
- return keys;
+ return new Script(this).executeWithKeys(sql);
}
/**
@@ -704,20 +461,7 @@
* @return a list of generated keys
*/
public List<Map<String, Object>> executeWithKeys(Connection c, String sql) {
- List<Map<String, Object>> keys = null;
- Statement s = null;
- try {
- s = c.createStatement();
- s.executeUpdate(sql, Statement.RETURN_GENERATED_KEYS);
- keys = toList(s.getGeneratedKeys());
- s.close();
- s = null;
- } catch (Exception ex) {
- logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex);
- } finally {
- closeStatementFinally(s);
- }
- return keys;
+ return new Script(this).executeWithKeys(c, sql);
}
/**
@@ -726,19 +470,7 @@
* @return the number of records affected by this statement or -1 if none
*/
public int execute(String sql) {
- int numRows = -1;
- Connection c = null;
- try {
- c = getConnection();
- numRows = execute(c, sql);
- c.close();
- c = null;
- } catch (Exception ex) {
- logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex);
- } finally {
- closeConnectionFinally(c);
- }
- return numRows;
+ return new Script(this).execute(sql);
}
/**
@@ -748,19 +480,7 @@
* @return the number of records affected by this statement or -1 if none
*/
public int execute(Connection c, String sql) {
- int numRows = -1;
- Statement s = null;
- try {
- s = c.createStatement();
- numRows = s.executeUpdate(sql);
- s.close();
- s = null;
- } catch (Exception ex) {
- logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex);
- } finally {
- closeStatementFinally(s);
- }
- return numRows;
+ return new Script(this).execute(c, sql);
}
/**
@@ -770,19 +490,7 @@
* @return the number of records affected by this statement or -1 if none
*/
public int execute(String sql, Object... params) {
- int numRows = -1;
- Connection c = null;
- try {
- c = getConnection();
- numRows = execute(c, sql, params);
- c.close();
- c = null;
- } catch (Exception ex) {
- logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex);
- } finally {
- closeConnectionFinally(c);
- }
- return numRows;
+ return new Script(this).execute(sql, params);
}
/**
@@ -793,23 +501,7 @@
* @return the number of records affected by this statement or -1 if none
*/
public int execute(Connection c, String sql, Object... params) {
- int numRows = -1;
- Statement s = null;
- try {
- //s = c.createStatement();
- s = buildQuery(c, sql, params);
- if(s != null && s instanceof PreparedStatement) {
- PreparedStatement ps = (PreparedStatement) s;
- numRows = ps.executeUpdate();
- ps.close();
- }
- s = null;
- } catch (Exception ex) {
- logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex);
- } finally {
- closeStatementFinally(s);
- }
- return numRows;
+ return new Script(this).execute(c, sql, params);
}
/**
@@ -822,24 +514,7 @@
* about the number of affected rows
*/
public int[] executeScript(String sqlScript) {
- int[] ergebnisse = null;
- Connection c = null;
- Statement s = null;
- try {
- c = getConnection();
- s = c.createStatement();
- String[] sqlKommandos = sqlScript.split(";");
- for(int i = 0; i < sqlKommandos.length; i++) {
- s.addBatch(sqlKommandos[i]);
- }
- ergebnisse = s.executeBatch();
- } catch(Exception ex) {
- logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex);
- } finally {
- closeStatementFinally(s);
- closeConnectionFinally(c);
- }
- return ergebnisse;
+ return new Script(this).executeScript(sqlScript);
}
/**
@@ -853,21 +528,7 @@
* about the number of affected rows
*/
public int[] executeScript(Connection c, String sqlScript) {
- int[] ergebnisse = null;
- Statement s = null;
- try {
- s = c.createStatement();
- String[] sqlKommandos = sqlScript.split(";");
- for(int i = 0; i < sqlKommandos.length; i++) {
- s.addBatch(sqlKommandos[i]);
- }
- ergebnisse = s.executeBatch();
- } catch(Exception ex) {
- logger.log(Level.SEVERE, ex.getLocalizedMessage(), ex);
- } finally {
- closeStatementFinally(s);
- }
- return ergebnisse;
+ return new Script(this).executeScript(c, sqlScript);
}
/* -------- transactions ------------ */
@@ -1003,39 +664,7 @@
* This first row has the field names
*/
public List<List<String>> toList(ResultSet rs, boolean includeBlobs) throws SQLException {
- List<List<String>> rows = new ArrayList<List<String>>();
- ResultSetMetaData meta = rs.getMetaData();
- int columnCount = meta.getColumnCount();
- List<String> header = new ArrayList<String>();
- for (int i = 1; i <= columnCount; i++) {
- header.add(meta.getColumnName(i));
- }
- rows.add(header);
- while (rs.next()) {
- List<String> row = new ArrayList<String>();
- for (int i = 1; i <= columnCount; i++) {
- String data = null;
- if (meta.getColumnType(i) == Types.BLOB) {
- if (includeBlobs) {
- Blob blob = rs.getBlob(i);
- if(blob != null) {
- data = new String(blob.getBytes((long) 1, (int) blob.length()));
- }
- }
- } else {
- Object o = rs.getObject(i);
- if(o != null) {
- data = o.toString();
- } else {
- data = NULL_STR;
- }
- logger.finest(data.toString());
- }
- row.add(data);
- }
- rows.add(row);
- }
- return rows;
+ return new ListConverter().toList(rs, includeBlobs);
}
/**
@@ -1045,9 +674,8 @@
* @return list of maps, one per row, with column name as the key
* @throws SQLException if the connection fails
*/
- private List<Map<String, Object>> toList(ResultSet rs) throws SQLException {
- List<String> wantedColumnNames = getColumnNames(rs);
- return toList(rs, wantedColumnNames);
+ public List<Map<String, Object>> toList(ResultSet rs) throws SQLException {
+ return new ListConverter().toList(rs);
}
/**
@@ -1058,42 +686,8 @@
* @return list of maps, one per column row, with column names as keys
* @throws SQLException if the connection fails
*/
- private List<Map<String, Object>> toList(ResultSet rs, List<String> wantedColumnNames) throws SQLException {
- // TODO BLOB handling
- List<Map<String, Object>> rows = new ArrayList<Map<String, Object>>();
- int numWantedColumns = wantedColumnNames.size();
- while (rs.next()) {
- Map<String, Object> row = new TreeMap<String, Object>();
- for (int i = 0; i < numWantedColumns; ++i) {
- String columnName = wantedColumnNames.get(i);
- Object value = rs.getObject(columnName);
- if (value != null) {
- row.put(columnName, value);
- //Logger.getLogger(Logger.GLOBAL_LOGGER_NAME).finest(columnName + " " + value);
- } else {
- row.put(columnName, "");
- }
- }
- rows.add(row);
- }
- return rows;
+ public List<Map<String, Object>> toList(ResultSet rs, List<String> wantedColumnNames) throws SQLException {
+ return new ListConverter().toList(rs, wantedColumnNames);
}
- /**
- * Return all column names as a list of strings
- *
- * @param database query result set
- * @return list of column name strings
- * @throws SQLException if the query fails
- */
- private List<String> getColumnNames(ResultSet rs) throws SQLException {
- List<String> columnNames = new ArrayList<String>();
- ResultSetMetaData meta = rs.getMetaData();
- int numColumns = meta.getColumnCount();
- for (int i = 1; i <= numColumns; ++i) {
- String cName = meta.getColumnName(i);
- columnNames.add(cName);
- }
- return columnNames;
- }
}
--
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