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A lightweight JDBC facade that provides a fluent API based on the Builder and Command design patterns.
There is a newer version: 2.0.3
/*
 * File created on Aug 10, 2015
 *
 * Copyright (c) 2015 Carl Harris, Jr
 * and others as noted
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.soulwing.jdbc;

import java.io.PrintWriter;
import java.sql.Array;
import java.sql.Blob;
import java.sql.CallableStatement;
import java.sql.Clob;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.NClob;
import java.sql.PreparedStatement;
import java.sql.SQLClientInfoException;
import java.sql.SQLException;
import java.sql.SQLFeatureNotSupportedException;
import java.sql.SQLWarning;
import java.sql.SQLXML;
import java.sql.Savepoint;
import java.sql.Statement;
import java.sql.Struct;
import java.util.Map;
import java.util.Properties;
import java.util.concurrent.Executor;
import java.util.logging.Logger;

import javax.sql.DataSource;

/**
 * A {@link DataSource} that has a single shared connection.
 * 
 * Care should be taken that this data source is not shared by multiple threads,
 * since transaction state is usually managed by having a connection per
 * thread.
 * @author Carl Harris
 */
class SingleConnectionDataSource implements DataSource {

  private final Connection connection;

  public SingleConnectionDataSource(Connection connection) {
    this.connection = new ConnectionWrapper(connection);
  }

  @Override
  public Connection getConnection() throws SQLException {
    return connection;
  }

  @Override
  public Connection getConnection(String username, String password)
      throws SQLException {
    throw new UnsupportedOperationException();
  }

  @Override
  public PrintWriter getLogWriter() throws SQLException {
    throw new UnsupportedOperationException();
  }

  @Override
  public void setLogWriter(PrintWriter out) throws SQLException {
    throw new UnsupportedOperationException();
  }

  @Override
  public void setLoginTimeout(int seconds) throws SQLException {
    throw new UnsupportedOperationException();
  }

  @Override
  public int getLoginTimeout() throws SQLException {
    throw new UnsupportedOperationException();
  }

  @Override
  public Logger getParentLogger() throws SQLFeatureNotSupportedException {
    throw new UnsupportedOperationException();
  }

  @Override
  public  T unwrap(Class iface) throws SQLException {
    throw new UnsupportedOperationException();
  }

  @Override
  public boolean isWrapperFor(Class iface) throws SQLException {
    throw new UnsupportedOperationException();
  }

  /**
   * A wrapper for a {@link Connection} that resists attempts to close its
   * delegate.
   */
  static class ConnectionWrapper implements Connection {

    private final Connection delegate;

    public ConnectionWrapper(Connection delegate) {
      this.delegate = delegate;
    }

    @Override
    public Statement createStatement() throws SQLException {
      return delegate.createStatement();
    }

    @Override
    public PreparedStatement prepareStatement(String sql) throws SQLException {
      return delegate.prepareStatement(sql);
    }

    @Override
    public CallableStatement prepareCall(String sql) throws SQLException {
      return delegate.prepareCall(sql);
    }

    @Override
    public String nativeSQL(String sql) throws SQLException {
      return delegate.nativeSQL(sql);
    }

    @Override
    public void setAutoCommit(boolean autoCommit) throws SQLException {
      delegate.setAutoCommit(autoCommit);
    }

    @Override
    public boolean getAutoCommit() throws SQLException {
      return delegate.getAutoCommit();
    }

    @Override
    public void commit() throws SQLException {
      delegate.commit();
    }

    @Override
    public void rollback() throws SQLException {
      delegate.rollback();
    }

    @Override
    public void close() throws SQLException {
      // don't allow it
    }

    @Override
    public boolean isClosed() throws SQLException {
      return delegate.isClosed();
    }

    @Override
    public DatabaseMetaData getMetaData() throws SQLException {
      return delegate.getMetaData();
    }

    @Override
    public void setReadOnly(boolean readOnly) throws SQLException {
      delegate.setReadOnly(readOnly);
    }

    @Override
    public boolean isReadOnly() throws SQLException {
      return delegate.isReadOnly();
    }

    @Override
    public void setCatalog(String catalog) throws SQLException {
      delegate.setCatalog(catalog);
    }

    @Override
    public String getCatalog() throws SQLException {
      return delegate.getCatalog();
    }

    @Override
    public void setTransactionIsolation(int level) throws SQLException {
      delegate.setTransactionIsolation(level);
    }

    @Override
    public int getTransactionIsolation() throws SQLException {
      return delegate.getTransactionIsolation();
    }

    @Override
    public SQLWarning getWarnings() throws SQLException {
      return delegate.getWarnings();
    }

    @Override
    public void clearWarnings() throws SQLException {
      delegate.clearWarnings();
    }

    @Override
    public Statement createStatement(int resultSetType,
        int resultSetConcurrency) throws SQLException {
      return delegate.createStatement(resultSetType, resultSetConcurrency);
    }

    @Override
    public PreparedStatement prepareStatement(String sql, int resultSetType,
        int resultSetConcurrency) throws SQLException {
      return delegate.prepareStatement(sql, resultSetType,
          resultSetConcurrency);
    }

    @Override
    public CallableStatement prepareCall(String sql, int resultSetType,
        int resultSetConcurrency) throws SQLException {
      return delegate.prepareCall(sql, resultSetType, resultSetConcurrency);
    }

    @Override
    public Map> getTypeMap() throws SQLException {
      return delegate.getTypeMap();
    }

    @Override
    public void setTypeMap(Map> map) throws SQLException {
      delegate.setTypeMap(map);
    }

    @Override
    public void setHoldability(int holdability) throws SQLException {
      delegate.setHoldability(holdability);
    }

    @Override
    public int getHoldability() throws SQLException {
      return delegate.getHoldability();
    }

    @Override
    public Savepoint setSavepoint() throws SQLException {
      return delegate.setSavepoint();
    }

    @Override
    public Savepoint setSavepoint(String name) throws SQLException {
      return delegate.setSavepoint(name);
    }

    @Override
    public void rollback(Savepoint savepoint) throws SQLException {
      delegate.rollback(savepoint);
    }

    @Override
    public void releaseSavepoint(Savepoint savepoint) throws SQLException {
      delegate.releaseSavepoint(savepoint);
    }

    @Override
    public Statement createStatement(int resultSetType,
        int resultSetConcurrency, int resultSetHoldability)
        throws SQLException {
      return delegate.createStatement(resultSetType, resultSetConcurrency,
          resultSetHoldability);
    }

    @Override
    public PreparedStatement prepareStatement(String sql, int resultSetType,
        int resultSetConcurrency, int resultSetHoldability)
        throws SQLException {
      return delegate.prepareStatement(sql, resultSetType, resultSetConcurrency,
          resultSetHoldability);
    }

    @Override
    public CallableStatement prepareCall(String sql, int resultSetType,
        int resultSetConcurrency, int resultSetHoldability)
        throws SQLException {
      return delegate.prepareCall(sql, resultSetType, resultSetConcurrency,
          resultSetHoldability);
    }

    @Override
    public PreparedStatement prepareStatement(String sql, int autoGeneratedKeys)
        throws SQLException {
      return delegate.prepareStatement(sql, autoGeneratedKeys);
    }

    @Override
    public PreparedStatement prepareStatement(String sql, int[] columnIndexes)
        throws SQLException {
      return delegate.prepareStatement(sql, columnIndexes);
    }

    @Override
    public PreparedStatement prepareStatement(String sql, String[] columnNames)
        throws SQLException {
      return delegate.prepareStatement(sql, columnNames);
    }

    @Override
    public Clob createClob() throws SQLException {
      return delegate.createClob();
    }

    @Override
    public Blob createBlob() throws SQLException {
      return delegate.createBlob();
    }

    @Override
    public NClob createNClob() throws SQLException {
      return delegate.createNClob();
    }

    @Override
    public SQLXML createSQLXML() throws SQLException {
      return delegate.createSQLXML();
    }

    @Override
    public boolean isValid(int timeout) throws SQLException {
      return delegate.isValid(timeout);
    }

    @Override
    public void setClientInfo(String name, String value)
        throws SQLClientInfoException {
      delegate.setClientInfo(name, value);
    }

    @Override
    public void setClientInfo(Properties properties)
        throws SQLClientInfoException {
      delegate.setClientInfo(properties);
    }

    @Override
    public String getClientInfo(String name) throws SQLException {
      return delegate.getClientInfo(name);
    }

    @Override
    public Properties getClientInfo() throws SQLException {
      return delegate.getClientInfo();
    }

    @Override
    public Array createArrayOf(String typeName, Object[] elements)
        throws SQLException {
      return delegate.createArrayOf(typeName, elements);
    }

    @Override
    public Struct createStruct(String typeName, Object[] attributes)
        throws SQLException {
      return delegate.createStruct(typeName, attributes);
    }

    @Override
    public void setSchema(String schema) throws SQLException {
      delegate.setSchema(schema);
    }

    @Override
    public String getSchema() throws SQLException {
      return delegate.getSchema();
    }

    @Override
    public void abort(Executor executor) throws SQLException {
      delegate.abort(executor);
    }

    @Override
    public void setNetworkTimeout(Executor executor, int milliseconds)
        throws SQLException {
      delegate.setNetworkTimeout(executor, milliseconds);
    }

    @Override
    public int getNetworkTimeout() throws SQLException {
      return delegate.getNetworkTimeout();
    }

    @Override
    public  T unwrap(Class iface) throws SQLException {
      return delegate.unwrap(iface);
    }

    @Override
    public boolean isWrapperFor(Class iface) throws SQLException {
      return delegate.isWrapperFor(iface);
    }
  }
}