root / tags / v1_1_Build_1000 / libraries / libGDBMS / src / main / java / com / hardcode / gdbms / engine / data / db / DBDataSourceAdapter.java @ 11885
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package com.hardcode.gdbms.engine.data.db; |
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import java.sql.Connection; |
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import java.sql.ResultSet; |
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import java.sql.SQLException; |
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import java.util.ArrayList; |
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import com.hardcode.driverManager.Driver; |
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import com.hardcode.driverManager.DriverLoadException; |
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import com.hardcode.gdbms.engine.data.AbstractDataSource; |
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import com.hardcode.gdbms.engine.data.SourceInfo; |
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import com.hardcode.gdbms.engine.data.driver.AlphanumericDBDriver; |
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import com.hardcode.gdbms.engine.data.driver.DBDriver; |
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import com.hardcode.gdbms.engine.data.driver.DriverException; |
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import com.hardcode.gdbms.engine.data.driver.GDBMSDriver; |
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import com.hardcode.gdbms.engine.data.edition.DataWare; |
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import com.hardcode.gdbms.engine.values.Value; |
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/**
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* Adaptador de la interfaz DBDriver a la interfaz DataSource. Adapta las
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* interfaces de los drivers de base de datos a la interfaz DataSource.
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*
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* @author Fernando Gonz?lez Cort?s
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*/
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public class DBDataSourceAdapter extends AbstractDataSource |
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implements DBDataSource {
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/*
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* datos de la conexi?n
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*/
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protected String host; |
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protected int port; |
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protected String dbName; |
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protected String user; |
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protected String password; |
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//driver de base de datos
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protected DBDriver driver;
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//objetos jdbc
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protected Connection con; |
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//Instrucci?n sql completa que representa el dataSource
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protected String sql; |
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/**
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* @see com.hardcode.gdbms.engine.data.driver.ObjectDriver#getRowCount()
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*/
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public long getRowCount() throws DriverException { |
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return ((DBDriver)getDriver()).getRowCount();
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} |
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/**
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* Establece el driver
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*
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* @param driver The driver to set.
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*/
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public void setDriver(DBDriver driver) { |
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this.driver = driver;
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} |
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/**
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* @see com.hardcode.gdbms.engine.data.driver.ObjectDriver#getFieldCount()
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*/
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public int getFieldCount() throws DriverException { |
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return ((DBDriver)getDriver()).getFieldCount();
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} |
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/**
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* @see com.hardcode.gdbms.engine.data.driver.ObjectDriver#getFieldName(int)
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*/
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public String getFieldName(int fieldId) throws DriverException { |
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return ((DBDriver)getDriver()).getFieldName(fieldId);
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} |
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/**
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* @see com.hardcode.gdbms.engine.data.driver.ObjectDriver#getFieldType(int)
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*/
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public int getFieldType(int i) throws DriverException { |
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return ((DBDriver)getDriver()).getFieldType(i);
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} |
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/**
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* @see com.hardcode.gdbms.engine.data.driver.ObjectDriver#getFieldValue(long,
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* int)
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*/
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public Value getFieldValue(long rowIndex, int fieldId) |
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throws DriverException {
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return ((DBDriver)getDriver()).getFieldValue(rowIndex, fieldId);
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} |
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/**
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* DOCUMENT ME!
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*
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* @return
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*/
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public Driver getDriver() { |
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return driver;
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} |
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/**
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* @see com.hardcode.gdbms.engine.data.DataSource#setSourceInfo(com.hardcode.gdbms.engine.data.driver.DriverInfo)
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*/
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public void setSourceInfo(SourceInfo sourceInfo) { |
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super.setSourceInfo(sourceInfo);
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this.host = ((DBSourceInfo) sourceInfo).host;
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this.port = ((DBSourceInfo) sourceInfo).port;
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this.dbName = ((DBSourceInfo) sourceInfo).dbName;
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this.user = ((DBSourceInfo) sourceInfo).user;
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this.password = ((DBSourceInfo) sourceInfo).password;
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this.tableName = ((DBTableSourceInfo) sourceInfo).tableName;
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this.con =((DBTableSourceInfo) sourceInfo).connection;
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this.sql = "SELECT * FROM " + tableName; |
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} |
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/**
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* @see com.hardcode.gdbms.engine.data.db.DBDataSource#execute(java.lang.String)
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*/
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public void execute(String sql) throws DriverException { |
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try {
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((DBDriver)getDriver()).execute(this.getConnection(), sql);
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} catch (SQLException e) { |
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throw new DriverException(e); |
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} |
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} |
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protected String tableName; |
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protected int sem = 0; |
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private int[] cachedPKIndices = null; |
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/**
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* Get's a connection to the driver
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*
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* @return Connection
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*
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* @throws SQLException if the connection cannot be established
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*/
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public Connection getConnection() throws SQLException { |
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if (this.con == null) { |
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return driver.getConnection(host, port, dbName, user, password);
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} |
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else {
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return this.con; |
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} |
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} |
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/**
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* @see com.hardcode.gdbms.engine.data.DataSource#start()
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*/
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public void start() throws DriverException { |
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try {
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if (sem == 0) { |
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con = getConnection(); |
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((AlphanumericDBDriver) driver).open(con, sql); |
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// driver.setSourceInfo(this.getSourceInfo());
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} |
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sem++; |
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} catch (SQLException e) { |
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throw new DriverException(e); |
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} |
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} |
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/**
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* @see com.hardcode.gdbms.engine.data.DataSource#stop()
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*/
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public void stop() throws DriverException { |
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try {
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sem--; |
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if (sem == 0) { |
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driver.close(); |
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if (this.con == null) { |
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con.close(); |
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con = null;
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} |
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} else if (sem < 0) { |
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throw new RuntimeException("DataSource closed too many times"); |
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} |
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} catch (SQLException e) { |
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throw new DriverException(e); |
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} |
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} |
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/**
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* @see com.hardcode.gdbms.engine.data.DataSource#getDBMS()
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*/
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public String getDBMS() { |
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return ((DBSourceInfo)sourceInfo).dbms;
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} |
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/**
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* @see com.hardcode.gdbms.engine.data.DataSource#getName()
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*/
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public String getName() { |
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return sourceInfo.name;
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} |
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/**
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* @see com.hardcode.gdbms.engine.data.DataSource#getPrimaryKeys()
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*/
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public int[] getPrimaryKeys() throws DriverException { |
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if (cachedPKIndices == null) { |
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try {
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//Gets the pk column names
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Connection c = getConnection();
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ResultSet rs = c.getMetaData().getPrimaryKeys(null, null, |
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driver.getInternalTableName(tableName)); |
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ArrayList pks = new ArrayList(); |
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while (rs.next()) {
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pks.add(rs.getString("COLUMN_NAME"));
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} |
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//create the index array
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cachedPKIndices = new int[pks.size()]; |
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for (int i = 0; i < cachedPKIndices.length; i++) { |
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cachedPKIndices[i] = getFieldIndexByName((String) pks.get(i));
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} |
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} catch (SQLException e) { |
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throw new DriverException(e); |
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} |
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} |
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return cachedPKIndices;
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} |
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/**
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* @throws DriverException
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* @see com.hardcode.gdbms.engine.data.DataSource#getDataWare(int)
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*/
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public DataWare getDataWare(int mode) throws DriverException { |
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try {
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DBDataWare dw = DBDataSourceFactory.newDataWareInstance(((DBDriver)getDriver()), mode); |
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DBDriver driver; |
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driver = (DBDriver) getDataSourceFactory().getDriverManager().getDriver(getDriver().getName()); |
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((GDBMSDriver) driver).setDataSourceFactory(getDataSourceFactory()); |
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dw.setDriver(driver); |
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dw.setDataSourceFactory(dsf); |
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dw.setSourceInfo(getSourceInfo()); |
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return dw;
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} catch (DriverLoadException e) {
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throw new DriverException(e); |
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} |
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} |
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public int getFieldWidth(int i) throws DriverException { |
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return ((DBDriver)getDriver()).getFieldWidth(i);
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} |
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public void reload() throws DriverException { |
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try {
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sem = 0;
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driver.close(); |
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if (this.con == null) { |
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con.close(); |
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con = null;
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} |
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} catch (SQLException e) { |
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throw new DriverException(e); |
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} |
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this.start();
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this.raiseEventReloaded();
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} |
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} |