package cn.org.rapid_framework.generator.provider.db.table;
import java.io.File;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import cn.org.rapid_framework.generator.GeneratorProperties;
import cn.org.rapid_framework.generator.provider.db.DataSourceProvider;
import cn.org.rapid_framework.generator.provider.db.table.model.Column;
import cn.org.rapid_framework.generator.provider.db.table.model.Table;
import cn.org.rapid_framework.generator.util.BeanHelper;
import cn.org.rapid_framework.generator.util.FileHelper;
import cn.org.rapid_framework.generator.util.GLogger;
import cn.org.rapid_framework.generator.util.StringHelper;
import cn.org.rapid_framework.generator.util.XMLHelper;
import cn.org.rapid_framework.generator.util.XMLHelper.NodeData;
/**
*
* 根据数据库表的元数据(metadata)创建Table对象
*
* <pre>
* getTable(sqlName) : 根据数据库表名,得到table对象
* getAllTable() : 搜索数据库的所有表,并得到table对象列表
* </pre>
* @author badqiu
* @email badqiu(a)gmail.com
*/
public class TableFactory {
private DbHelper dbHelper = new DbHelper();
private static TableFactory instance = null;
private TableFactory() {
}
public synchronized static TableFactory getInstance() {
if(instance == null) instance = new TableFactory();
return instance;
}
public String getCatalog() {
return GeneratorProperties.getNullIfBlank("jdbc.catalog");
}
public String getSchema() {
return GeneratorProperties.getNullIfBlank("jdbc.schema");
}
private Connection getConnection() {
return DataSourceProvider.getConnection();
}
public List getAllTables() {
try {
Connection conn = getConnection();
return getAllTables(conn);
}catch(Exception e) {
throw new RuntimeException(e);
}
}
public Table getTable(String tableName) {
return getTable(getSchema(),tableName);
}
private Table getTable(String schema,String tableName) {
return getTable(getCatalog(),schema,tableName);
}
private Table getTable(String catalog,String schema,String tableName) {
Table t = null;
try {
t = _getTable(catalog,schema,tableName);
if(t == null && !tableName.equals(tableName.toUpperCase())) {
t = _getTable(catalog,schema,tableName.toUpperCase());
}
if(t == null && !tableName.equals(tableName.toLowerCase())) {
t = _getTable(catalog,schema,tableName.toLowerCase());
}
}catch(Exception e) {
throw new RuntimeException(e);
}
if(t == null) {
throw new NotFoundTableException("not found table with give name:"+tableName+ (dbHelper.isOracleDataBase() ? " \n databaseStructureInfo:"+getDatabaseStructureInfo() : ""));
}
return t;
}
public static class NotFoundTableException extends RuntimeException {
private static final long serialVersionUID = 5976869128012158628L;
public NotFoundTableException(String message) {
super(message);
}
}
private Table _getTable(String catalog,String schema,String tableName) throws SQLException {
if(tableName== null || tableName.trim().length() == 0)
throw new IllegalArgumentException("tableName must be not empty");
catalog = StringHelper.defaultIfEmpty(catalog, null);
schema = StringHelper.defaultIfEmpty(schema, null);
Connection conn = getConnection();
DatabaseMetaData dbMetaData = conn.getMetaData();
ResultSet rs = dbMetaData.getTables(catalog, schema, tableName, null);
while(rs.next()) {
Table table = createTable(conn, rs);
return table;
}
return null;
}
private Table createTable(Connection conn, ResultSet rs) throws SQLException {
String realTableName = null;
try {
ResultSetMetaData rsMetaData = rs.getMetaData();
String schemaName = rs.getString("TABLE_SCHEM") == null ? "" : rs.getString("TABLE_SCHEM");
realTableName = rs.getString("TABLE_NAME");
String tableType = rs.getString("TABLE_TYPE");
String remarks = rs.getString("REMARKS");
if(remarks == null && dbHelper.isOracleDataBase()) {
remarks = getOracleTableComments(realTableName);
}
Table table = new Table();
table.setSqlName(realTableName);
table.setRemarks(remarks);
if ("SYNONYM".equals(tableType) && dbHelper.isOracleDataBase()) {
table.setOwnerSynonymName(getSynonymOwner(realTableName));
}
retriveTableColumns(table);
table.initExportedKeys(conn.getMetaData());
table.initImportedKeys(conn.getMetaData());
BeanHelper.copyProperties(table, TableOverrideValuesProvider.getTableOverrideValues(table.getSqlName()));
return table;
}catch(SQLException e) {
throw new RuntimeException("create table object error,tableName:"+realTableName,e);
}
}
private List getAllTables(Connection conn) throws SQLException {
DatabaseMetaData dbMetaData = conn.getMetaData();
ResultSet rs = dbMetaData.getTables(getCatalog(), getSchema(), null, null);
List tables = new ArrayList();
while(rs.next()) {
tables.add(createTable(conn, rs));
}
return tables;
}
private String getSynonymOwner(String synonymName) {
PreparedStatement ps = null;
ResultSet rs = null;
String ret = null;
try {
ps = getConnection().prepareStatement("select table_owner from sys.all_synonyms where table_name=? and owner=?");
ps.setString(1, synonymName);
ps.setString(2, getSchema());
rs = ps.executeQuery();
if (rs.next()) {
ret = rs.getString(1);
}
else {
String databaseStructure = getDatabaseStructureInfo();
throw new RuntimeException("Wow! Synonym " + synonymName + " not found. How can it happen? " + databaseStructure);
}
} catch (SQLException e) {
String databaseStructure = getDatabaseStructureInfo();
GLogger.error(e.getMessage(), e);
throw new RuntimeException("Exception in getting synonym owner " + databaseStructure);
} finally {
dbHelper.close(rs,ps);
}
return ret;
}
private String getDatabaseStructureInfo() {
ResultSet schemaRs = null;
ResultSet catalogRs = null;
String nl = System.getProperty("line.separator");
StringBuffer sb = new StringBuffer(nl);
// Let's give the user some feedback. The exception
// is probably related to incorrect schema configuration.
sb.append("Configured schema:").append(getSchema()).append(nl);
sb.append("Configured catalog:").append(getCatalog()).append(nl);
try {
schemaRs = getMetaData().getSchemas();
sb.append("Available schemas:").append(nl);
while (schemaRs.next()) {
sb.append(" ").append(schemaRs.getString("TABLE_SCHEM")).append(nl);
}
} catch (SQLException e2) {
GLogger.warn("Couldn't get schemas", e2);
sb.append(" ?? Couldn't get schemas ??").append(nl);
} finally {
dbHelper.close(schemaRs,null);
}
try {
catalogRs = getMetaData().getCatalogs();
sb.append("Available catalogs:").append(nl);
while (catalogRs.next()) {
sb.append(" ").append(catalogRs.getString("TABLE_CAT")).append(nl);
}
} catch (SQLException e2) {
GLogger.warn("Couldn't get catalogs", e2);
sb.append(" ?? Couldn't get catalogs ??").append(nl);
} finally {
dbHelper.close(catalogRs,null);
}
return sb.toString();
}
private DatabaseMetaData getMetaData() throws SQLException {
return getConnection().getMetaData();
}
private void retriveTableColumns(Table table) throws SQLException {
GLogger.trace("-------setColumns(" + table.getSqlName() + ")");
List primaryKeys = getTablePrimaryKeys(table);
table.setPrimaryKeyColumns(primaryKeys);
// get the indices and unique columns
List indices = new LinkedList();
// maps index names to a list of columns in the index
Map uniqueIndices = new HashMap();
// maps column names to the index name.
Map uniqueColumns = new HashMap();
ResultSet indexRs = null;
try {
if (table.getOwnerSynonymName() != null) {
indexRs = getMetaData().getIndexInfo(getCatalog(), table.getOwnerSynonymName(), table.getSqlName(), false, true);
}
else {
indexRs = getMetaData().getIndexInfo(getCatalog(), getSchema(), table.getSqlName(), false, true);
}
while (indexRs.next()) {
String columnName = indexRs.getString("COLUMN_NAME");
if (columnName != null) {
GLogger.trace("index:" + columnName);
indices.add(columnName);
}
// now look for unique columns
String indexName = indexRs.getString("INDEX_NAME");
boolean nonUnique = indexRs.getBoolean("NON_UNIQUE");
if (!nonUnique && columnName != null && indexName != null) {
List l = (List)uniqueColumns.get(indexName);
if (l == null) {
l = new ArrayList();
uniqueColumns.put(indexName, l);
}
l.add(columnName);
uniqueIndices.put(columnName, indexName);
GLogger.trace("unique:" + columnName + " (" + indexName + ")");
}
}
} catch (Throwable t) {
// Bug #604761 Oracle getIndexInfo() needs major grants
// http://sourceforge.net/tracker/index.php?func=detail&aid=604761&group_id=36044&atid=415990
} finally {
dbHelper.close(indexRs,null);
}
List columns = getTableColumns(table, primaryKeys, indices, uniqueIndices, uniqueColumns);
for (Iterator i = columns.iterator(); i.hasNext(); ) {
Column column = (Column)i.next();
table.addColumn(column);
}
// In case none of the columns were primary keys, issue a warning.
if (primaryKeys.size() == 0) {
GLogger.warn("WARNING: The JDBC driver didn't report any primary key columns in " + table.getSqlName());
}
}
private List getTableColumns(Table table, List primaryKeys, List indices, Map uniqueIndices, Map uniqueColumns) throws SQLException {
// get the columns
List columns = new LinkedList();
ResultSet columnRs = getColumnsResultSet(table);
while (columnRs.next()) {
int sqlType = columnRs.getInt("DATA_TYPE");
String sqlTypeName = columnRs.getString("TYPE_NAME");
String columnName = columnRs.getString("COLUMN_NAME");
String columnDefaultValue = columnRs.getString("COLUMN_DEF");
String remarks = columnRs.getString("REMARKS");
if(remarks == null && dbHelper.isOracleDataBase()) {
remarks = getOracleColumnComments(table.getSqlName(), columnName);
}
// if columnNoNulls or columnNullableUnknown assume "not nullable"
boolean isNullable = (DatabaseMetaData.columnNullable == columnRs.getInt("NULLABLE"));
int size = columnRs.getInt("COLUMN_SIZE");
int decimalDigits = columnRs.getInt("DECIMAL_DIGITS");
boolean isPk = primaryKeys.contains(columnName);
boolean isIndexed = indices.contains(columnName);
String uniqueIndex = (String)uniqueIndices.get(columnName);
List columnsInUniqueIndex = null;
if (uniqueIndex != null) {
columnsInUniqueIndex = (List)uniqueColumns.get(uniqueIndex);
}
boolean isUnique = columnsInUniqueIndex != null && columnsInUniqueIndex.size() == 1;
if (isUnique) {
GLogger.trace("unique column:" + columnName);
}
Column column = new Column(
table,
sqlType,
sqlTypeName,
columnName,
size,
decimalDigits,
isPk,
isNullable,
isIndexed,
isUnique,
columnDefaultValue,
remarks);
BeanHelper.copyProperties(column,TableOverrideValuesProvider.getColumnOverrideValues(table,column));
columns.add(column);
}
columnRs.close();
return columns;
}
private ResultSet getColumnsResultSet(Table table) throws SQLException {
ResultSet columnRs = null;
if (table.getOwnerSynonymName() != null) {
columnRs = getMetaData().getColumns(getCatalog(), table.getOwnerSynonymName(), table.getSqlName(), null);
} else {
columnRs = getMetaData().getColumns(getCatalog(), getSchema(), table.getSqlName(), null);
}
return columnRs;
}
private List<String> getTablePrimaryKeys(Table table) throws SQLException {
// get the primary keys
List primaryKeys = new LinkedList();
ResultSet primaryKeyRs = null;
if (table.getOwnerSynonymName() != null) {
primaryKeyRs = getMetaData().getPrimaryKeys(getCatalog(), table.getOwnerSynonymName(), table.getSqlName());
}
else {
primaryKeyRs = getMetaData().getPrimaryKeys(getCatalog(), getSchema(), table.getSqlName());
}
while (primaryKeyRs.next()) {
String columnName = primaryKeyRs.getString("COLUMN_NAME");
GLogger.trace("primary key:" + columnName);
primaryKeys.add(columnName);
}
primaryKeyRs.close();
return primaryKeys;
}
private String getOracleTableComments(String table) {
String sql = "SELECT comments FROM user_tab_comments WHERE table_name='"+table+"'";
return dbHelper.queryForString(sql);
}
private String getOracleColumnComments(String table,String column) {
String sql = "SELECT comments FROM user_col_comments WHERE table_name='"+table+"' AND column_name = '"+column+"'";
return dbHelper.queryForString(sql);
}
/** 得到表的自定义配置信息 */
public static class TableOverrideValuesProvider {
private static Map getTableOverrideValues(String tableSqlName){
NodeData nd = getTableConfigXmlNodeData(tableSqlName);
if(nd == null) {
return new HashMap();
}
return nd == null ? new HashMap() : nd.attributes;
}
private static Map getColumnOverrideValues(Table table, Column column) {
NodeData root = getTableConfigXmlNodeData(table.getSqlName());
if(root != null){
for(NodeData item : root.childs) {
if(item.nodeName.equals("column")) {
if(column.getSqlName().equalsIgnoreCase(item.attributes.get("sqlName"))) {
return item.attributes;
}
}
}
}
return new HashMap();
}
private static NodeData getTableConfigXmlNodeData(String tableSqlName){
NodeData nd = getTableConfigXmlNodeData0(tableSqlName);
if(nd == null) {
nd = getTableConfigXmlNodeData0(tableSqlName.toLowerCase());
if(nd == null) {
nd = getTableConfigXmlNodeData0(tableSqlName.toUpperCase());
}
}
return nd;
}
private static NodeData getTableConfigXmlNodeData0(String tableSqlName) {
try {
File file = FileHelper.getFileByClassLoader("generator_config/table/"+tableSqlName+".xml");
GLogger.trace("getTableConfigXml() load nodeData by tableSqlName:"+tableSqlName+".xml");
return new XMLHelper().parseXML(file);
}catch(Exception e) {//ignore
GLogger.trace("not found config xml for table:"+tableSqlName+", exception:"+e);
return null;
}
}
}
class DbHelper {
public void close(ResultSet rs,PreparedStatement ps,Statement... statements) {
try {
if(ps != null) ps.close();
if(rs != null) rs.close();
for(Statement s : statements) {s.close();}
}catch(Exception e){
}
}
public boolean isOracleDataBase() {
try {
return DatabaseMetaDataUtils.isOracleDataBase(getMetaData());
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
public String queryForString(String sql) {
Statement s = null;
ResultSet rs = null;
try {
s = getConnection().createStatement();
rs = s.executeQuery(sql);
if(rs.next()) {
return rs.getString(1);
}
return null;
}catch(SQLException e) {
e.printStackTrace();
return null;
}finally {
close(rs,null,s);
}
}
}
public static class DatabaseMetaDataUtils {
public static boolean isOracleDataBase(DatabaseMetaData metadata) {
try {
boolean ret = false;
ret = (metadata.getDatabaseProductName().toLowerCase()
.indexOf("oracle") != -1);
return ret;
}catch(SQLException s) {
return false;
// throw new RuntimeException(s);
}
}
public static boolean isHsqlDataBase(DatabaseMetaData metadata) {
try {
boolean ret = false;
ret = (metadata.getDatabaseProductName().toLowerCase()
.indexOf("hsql") != -1);
return ret;
}catch(SQLException s) {
return false;
// throw new RuntimeException(s);
}
}
}
}