categorydaoimpl.java

Jsp网站开发四库全书中的blog网站设计

/*
 * This source file was generated by FireStorm/DAO 3.0 (build 99)
 * on 26-十月-2005 at 09:50:56
 * 
 * If you purchase a full license for FireStorm/DAO you can customize this file header.
 * 
 * For more information please visit http://www.codefutures.com/products/firestorm
 */

package cn.wanfeng.myblog.jdbc;

import cn.wanfeng.myblog.dao.*;
import cn.wanfeng.myblog.factory.*;
import cn.wanfeng.myblog.dto.*;
import cn.wanfeng.myblog.exceptions.*;
import java.sql.Connection;
import java.sql.Types;
import java.util.Collection;
import java.sql.PreparedStatement;
import java.sql.Statement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Time;
import java.util.List;
import java.util.Iterator;
import java.util.ArrayList;
import java.sql.CallableStatement;

public class CategoryDaoImpl extends AbstractDataAccessObject implements CategoryDao
{
	/** 
	 * The factory class for this DAO has two versions of the create() method - one that
takes no arguments and one that takes a Connection argument. If the Connection version
is chosen then the connection will be stored in this attribute and will be used by all
calls to this DAO, otherwise a new Connection will be allocated for each operation.
	 */
	protected java.sql.Connection userConn;

	/** 
	 * All finder methods in this class use this SELECT constant to build their queries
	 */
	protected final String SQL_SELECT = "SELECT CategoryID, Name, Description FROM " + getTableName() + "";

	/** 
	 * Finder methods will pass this value to the JDBC setMaxRows method
	 */
	private int maxRows;

	/** 
	 * SQL INSERT statement for this table
	 */
	protected final String SQL_INSERT = "INSERT INTO " + getTableName() + " ( Name, Description ) VALUES ( ?, ? );SELECT @@IDENTITY";

	/** 
	 * SQL UPDATE statement for this table
	 */
	protected final String SQL_UPDATE = "UPDATE " + getTableName() + " SET Name = ?, Description = ? WHERE CategoryID = ?";

	/** 
	 * SQL DELETE statement for this table
	 */
	protected final String SQL_DELETE = "DELETE FROM " + getTableName() + " WHERE CategoryID = ?";

	/** 
	 * Index of column CategoryID
	 */
	protected static final int COLUMN_CATEGORY_I_D = 1;

	/** 
	 * Index of column Name
	 */
	protected static final int COLUMN_NAME = 2;

	/** 
	 * Index of column Description
	 */
	protected static final int COLUMN_DESCRIPTION = 3;

	/** 
	 * Number of columns
	 */
	protected static final int NUMBER_OF_COLUMNS = 3;

	/** 
	 * Index of primary-key column CategoryID
	 */
	protected static final int PK_COLUMN_CATEGORY_I_D = 1;

	/** 
	 * Inserts a new row in the Category table.
	 */
	public CategoryPk insert(Category dto) throws CategoryDaoException
	{
		long t1 = System.currentTimeMillis();
		// declare variables
		final boolean isConnSupplied = (userConn != null);
		Connection conn = null;
		CallableStatement stmt = null;
		ResultSet rs = null;
		
		try {
			// get the user-specified connection or get a connection from the ResourceManager
			conn = isConnSupplied ? userConn : ResourceManager.getConnection();
		
			stmt = conn.prepareCall( SQL_INSERT );
			// no bind statement for auto increment column 'CategoryID
			stmt.setString( COLUMN_NAME - 1, dto.getName() );
			stmt.setString( COLUMN_DESCRIPTION - 1, dto.getDescription() );
			System.out.println( "Executing " + SQL_INSERT + " with DTO: " + dto );
			stmt.execute();
			int rows = stmt.getUpdateCount();
			System.out.println( rows + " rows affected" );
		
			// retrieve values from IDENTITY columns
			boolean moreResults = true;
			while (moreResults || rows != -1) {
				try {
					rs = stmt.getResultSet();
				}
				catch (IllegalArgumentException e) {
					e.printStackTrace();
				}
		
				if (rs != null) {
					rs.next();
					dto.setCategoryID( rs.getInt( 1 ) );
				}
		
				moreResults = stmt.getMoreResults();
				rows = stmt.getUpdateCount();
			}
		
			return dto.createPk();
		}
		catch (SQLException _e) {
			_e.printStackTrace();
			throw new CategoryDaoException( "SQLException: " + _e.getMessage(), _e );
		}
		catch (Exception _e) {
			_e.printStackTrace();
			throw new CategoryDaoException( "Exception: " + _e.getMessage(), _e );
		}
		finally {
			ResourceManager.close(stmt);
			if (!isConnSupplied) {
				ResourceManager.close(conn);
			}
		
		}
		
	}

	/** 
	 * Updates a single row in the Category table.
	 */
	public void update(CategoryPk pk, Category dto) throws CategoryDaoException
	{
		long t1 = System.currentTimeMillis();
		// declare variables
		final boolean isConnSupplied = (userConn != null);
		Connection conn = null;
		PreparedStatement stmt = null;
		
		try {
			// get the user-specified connection or get a connection from the ResourceManager
			conn = isConnSupplied ? userConn : ResourceManager.getConnection();
		
			StringBuffer sql = new StringBuffer();
			sql.append( "UPDATE " + getTableName() + " SET " );
			boolean modified = false;
			if (dto.isCategoryIDModified()) {
				if (modified) {
					sql.append( ", " );
				}
		
				sql.append( "CategoryID=?" );
				modified=true;
			}
		
			if (dto.isNameModified()) {
				if (modified) {
					sql.append( ", " );
				}
		
				sql.append( "Name=?" );
				modified=true;
			}
		
			if (dto.isDescriptionModified()) {
				if (modified) {
					sql.append( ", " );
				}
		
				sql.append( "Description=?" );
				modified=true;
			}
		
			if (!modified) {
				// nothing to update
				return;
			}
		
			sql.append( " WHERE CategoryID=?" );
			System.out.println( "Executing " + sql.toString() + " with values: " + dto );
			stmt = conn.prepareStatement( sql.toString() );
			int index = 1;
			if (dto.isCategoryIDModified()) {
				stmt.setInt( index++, dto.getCategoryID() );
			}
		
			if (dto.isNameModified()) {
				stmt.setString( index++, dto.getName() );
			}
		
			if (dto.isDescriptionModified()) {
				stmt.setString( index++, dto.getDescription() );
			}
		
			stmt.setInt( index++, pk.getCategoryID() );
			int rows = stmt.executeUpdate();
			long t2 = System.currentTimeMillis();
			System.out.println( rows + " rows affected (" + (t2-t1) + " ms)" );
		}
		catch (SQLException _e) {
			_e.printStackTrace();
			throw new CategoryDaoException( "SQLException: " + _e.getMessage(), _e );
		}
		catch (Exception _e) {
			_e.printStackTrace();
			throw new CategoryDaoException( "Exception: " + _e.getMessage(), _e );
		}
		finally {
			ResourceManager.close(stmt);
			if (!isConnSupplied) {
				ResourceManager.close(conn);
			}
		
		}
		
	}

	/** 
	 * Deletes a single row in the Category table.
	 */
	public void delete(CategoryPk pk) throws CategoryDaoException
	{
		long t1 = System.currentTimeMillis();
		// declare variables
		final boolean isConnSupplied = (userConn != null);
		Connection conn = null;
		PreparedStatement stmt = null;
		
		try {
			// get the user-specified connection or get a connection from the ResourceManager
			conn = isConnSupplied ? userConn : ResourceManager.getConnection();
		
			System.out.println( "Executing " + SQL_DELETE + " with PK: " + pk );
			stmt = conn.prepareStatement( SQL_DELETE );
			stmt.setInt( 1, pk.getCategoryID() );
			int rows = stmt.executeUpdate();
			long t2 = System.currentTimeMillis();
			System.out.println( rows + " rows affected (" + (t2-t1) + " ms)" );
		}
		catch (SQLException _e) {
			_e.printStackTrace();
			throw new CategoryDaoException( "SQLException: " + _e.getMessage(), _e );
		}
		catch (Exception _e) {
			_e.printStackTrace();
			throw new CategoryDaoException( "Exception: " + _e.getMessage(), _e );
		}
		finally {
			ResourceManager.close(stmt);
			if (!isConnSupplied) {
				ResourceManager.close(conn);
			}
		
		}
		
	}

	/** 
	 * Returns the rows from the Category table that matches the specified primary-key value.
	 */
	public Category findByPrimaryKey(CategoryPk pk) throws CategoryDaoException
	{
		return findByPrimaryKey( pk.getCategoryID() );
	}

	/** 
	 * Returns all rows from the Category table that match the criteria ''.
	 */
	public Category[] findAll() throws CategoryDaoException
	{
		return findByDynamicSelect( SQL_SELECT + " ORDER BY CategoryID", null );
	}

	/** 
	 * Returns all rows from the Category table that match the criteria 'CategoryID = :categoryID'.
	 */
	public Category findByPrimaryKey(int categoryID) throws CategoryDaoException
	{
		Category ret[] = findByDynamicSelect( SQL_SELECT + " WHERE CategoryID = ?", new Object[] {  new Integer(categoryID) } );
		return ret.length==0 ? null : ret[0];
	}

	/** 
	 * Returns all rows from the Category table that match the criteria 'CategoryID = :categoryID'.
	 */
	public Category[] findWhereCategoryIDEquals(int categoryID) throws CategoryDaoException
	{
		return findByDynamicSelect( SQL_SELECT + " WHERE CategoryID = ? ORDER BY CategoryID", new Object[] {  new Integer(categoryID) } );
	}

	/** 
	 * Returns all rows from the Category table that match the criteria 'Name = :name'.
	 */
	public Category[] findWhereNameEquals(String name) throws CategoryDaoException
	{
		return findByDynamicSelect( SQL_SELECT + " WHERE Name = ? ORDER BY Name", new Object[] { name } );
	}

	/** 
	 * Returns all rows from the Category table that match the criteria 'Description = :description'.
	 */
	public Category[] findWhereDescriptionEquals(String description) throws CategoryDaoException
	{
		return findByDynamicSelect( SQL_SELECT + " WHERE Description = ? ORDER BY Description", new Object[] { description } );
	}

	/**
	 * Method 'CategoryDaoImpl'
	 * 
	 */
	public CategoryDaoImpl()
	{
	}

	/**
	 * Method 'CategoryDaoImpl'
	 * 
	 * @param userConn
	 */
	public CategoryDaoImpl(final java.sql.Connection userConn)
	{
		this.userConn = userConn;
	}

	/** 
	 * Sets the value of maxRows
	 */
	public void setMaxRows(int maxRows)
	{
		this.maxRows = maxRows;
	}

	/** 
	 * Gets the value of maxRows
	 */
	public int getMaxRows()
	{
		return maxRows;
	}

	/**
	 * Method 'getTableName'
	 * 
	 * @return String
	 */
	public String getTableName()
	{
		return "MyBlog..Category";
	}

	/** 
	 * Fetches a single row from the result set
	 */
	protected Category fetchSingleResult(ResultSet rs) throws SQLException
	{
		if (rs.next()) {
			Category dto = new Category();
			populateDto( dto, rs);
			return dto;
		} else {
			return null;
		}
		
	}

	/** 
	 * Fetches multiple rows from the result set
	 */
	protected Category[] fetchMultiResults(ResultSet rs) throws SQLException
	{
		Collection resultList = new ArrayList();
		while (rs.next()) {
			Category dto = new Category();
			populateDto( dto, rs);
			resultList.add( dto );
		}
		
		Category ret[] = new Category[ resultList.size() ];
		resultList.toArray( ret );
		return ret;
	}

	/** 
	 * Populates a DTO with data from a ResultSet
	 */
	protected void populateDto(Category dto, ResultSet rs) throws SQLException
	{
		dto.setCategoryID( rs.getInt( COLUMN_CATEGORY_I_D ) );
		dto.setName( rs.getString( COLUMN_NAME ) );
		dto.setDescription( rs.getString( COLUMN_DESCRIPTION ) );
	}

	/** 
	 * Returns all rows from the Category table that match the specified arbitrary SQL statement
	 */
	public Category[] findByDynamicSelect(String sql, Object[] sqlParams) throws CategoryDaoException
	{
		// declare variables
		final boolean isConnSupplied = (userConn != null);
		Connection conn = null;
		PreparedStatement stmt = null;
		ResultSet rs = null;
		
		try {
			// get the user-specified connection or get a connection from the ResourceManager
			conn = isConnSupplied ? userConn : ResourceManager.getConnection();
		
			// construct the SQL statement
			final String SQL = sql;
		
		
			System.out.println( "Executing " + SQL );
			// prepare statement
			stmt = conn.prepareStatement( SQL );
			stmt.setMaxRows( maxRows );
		
			// bind parameters
			for (int i=0; sqlParams!=null && i<sqlParams.length; i++ ) {
				stmt.setObject( i+1, sqlParams[i] );
			}
		
		
			rs = stmt.executeQuery();
		
			// fetch the results
			return fetchMultiResults(rs);
		}
		catch (SQLException _e) {
			_e.printStackTrace();
			throw new CategoryDaoException( "SQLException: " + _e.getMessage(), _e );
		}
		catch (Exception _e) {
			_e.printStackTrace();
			throw new CategoryDaoException( "Exception: " + _e.getMessage(), _e );
		}
		finally {
			ResourceManager.close(rs);
			ResourceManager.close(stmt);
			if (!isConnSupplied) {
				ResourceManager.close(conn);
			}
		
		}
		
	}

	/** 
	 * Returns all rows from the Category table that match the specified arbitrary SQL statement
	 */
	public Category[] findByDynamicWhere(String sql, Object[] sqlParams) throws CategoryDaoException
	{
		// declare variables
		final boolean isConnSupplied = (userConn != null);
		Connection conn = null;
		PreparedStatement stmt = null;
		ResultSet rs = null;
		
		try {
			// get the user-specified connection or get a connection from the ResourceManager
			conn = isConnSupplied ? userConn : ResourceManager.getConnection();
		
			// construct the SQL statement
			final String SQL = SQL_SELECT + " WHERE " + sql;
		
		
			System.out.println( "Executing " + SQL );
			// prepare statement
			stmt = conn.prepareStatement( SQL );
			stmt.setMaxRows( maxRows );
		
			// bind parameters
			for (int i=0; sqlParams!=null && i<sqlParams.length; i++ ) {
				stmt.setObject( i+1, sqlParams[i] );
			}
		
		
			rs = stmt.executeQuery();
		
			// fetch the results
			return fetchMultiResults(rs);
		}
		catch (SQLException _e) {
			_e.printStackTrace();
			throw new CategoryDaoException( "SQLException: " + _e.getMessage(), _e );
		}
		catch (Exception _e) {
			_e.printStackTrace();
			throw new CategoryDaoException( "Exception: " + _e.getMessage(), _e );
		}
		finally {
			ResourceManager.close(rs);
			ResourceManager.close(stmt);
			if (!isConnSupplied) {
				ResourceManager.close(conn);
			}
		
		}
		
	}

}