基于Java的DataBuffer在Java中使用ADO.NET.zip

/* * $Id: WebRowSetDataProvider.java,v 1.6.2.1 2006/01/13 02:00:59 rbair Exp $ * * Created on March 21, 2005, 9:52 AM * Copyright 2005 Sun Microsystems, Inc., 4150 Network Circle, * Santa Clara, California 95054, U.S.A. All rights reserved. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ package org.jdesktop.databuffer.provider.sql; import java.io.InputStream; import java.io.InputStreamReader; import java.io.Reader; import java.math.BigDecimal; import java.net.URL; import java.sql.SQLException; import java.sql.Timestamp; import java.sql.Types; import java.util.HashMap; import java.util.LinkedList; import java.util.List; import java.util.Map; import java.util.Stack; import java.util.logging.Level; import java.util.logging.Logger; import javax.sql.RowSetMetaData; import javax.sql.rowset.RowSetMetaDataImpl; import javax.swing.SwingUtilities; import javax.xml.parsers.SAXParser; import javax.xml.parsers.SAXParserFactory; import org.jdesktop.databuffer.DataColumn; import org.jdesktop.databuffer.DataProvider; import org.jdesktop.databuffer.DataRow; import org.jdesktop.databuffer.DataTable; import org.jdesktop.databuffer.event.TableChangeEvent; import org.jdesktop.databuffer.provider.LoadTask; import org.jdesktop.databuffer.provider.SaveTask; import org.xml.sax.Attributes; import org.xml.sax.InputSource; import org.xml.sax.SAXException; import org.xml.sax.XMLReader; import org.xml.sax.ext.LexicalHandler; import org.xml.sax.helpers.DefaultHandler; import com.sun.org.apache.xerces.internal.impl.dv.util.Base64; /** * Takes webrowset XML and uses it to populate a DataTable. This particular * DataProvider will drop all of the columns from the DataTable and add new * columns back in based on the meta data in the XML. * * @author Richard Bair */ public class WebRowSetDataProvider extends DataProvider { /** The Logger */ private static final Logger LOG = Logger.getLogger(WebRowSetDataProvider.class.getName()); /** * A static instance of the Factory used to parse documents in this WebRowSet implementation */ private static final SAXParserFactory FACTORY = SAXParserFactory.newInstance(); private URL url; private Runnable completionRunnable; private Runnable metadataCompleteRunnable; /** * Static initialization code for the FACTORY. Currently setting validating to false. */ static { FACTORY.setValidating(false); } /** Creates a new instance of WebRowSetDataProvider */ public WebRowSetDataProvider() { } protected SaveTask createSaveTask(DataTable[] tables) { return new SaveTask(tables) { protected void saveData(DataTable[] tables) throws Exception {} }; } final class RowLoadItem { public Object[] values; public DataRow.DataRowStatus status; } protected LoadTask createLoadTask(DataTable[] tables) { return new LoadTask(tables) { class WebRowSetXMLHandler extends DefaultHandler implements LexicalHandler { DataTable table; /** * List to keep track of rows that need to be loaded */ private List dataToLoad = new LinkedList(); /** * Stack to keep track of which tags have been seen */ private Stack<String> tagStack = new Stack<String>(); /** * Set to true if we have seen an opening "properties" tag, but not a closing. * inProperties, inMetaData, and inData are mutually exclusive */ private boolean inProperties = false; /** * Set to true if we have seen an opening "metadata" tag, but not a closing. * inProperties, inMetaData, and inData are mutually exclusive */ private boolean inMetaData = false; /** * Set to true if we have seen an opening "data" tag, but not a closing. * inProperties, inMetaData, and inData are mutually exclusive */ private boolean inData = false; /** * The meta data object being updated. This metaData object is modified until the * closing "metadata" tag is found. Then the ShopLogicWebRowSet's meta data is updated * in one fell stroke */ private RowSetMetaData metaData = null; /** * Keeps track of which column we are currently dealing with. This is used both by the * metadata parsing code, and the data parsing code */ private int columnIndex = 1; /** * This is a stack of keyColumns parsed. After being parsed and added to this stack, they are * added to an int[] and set in the WebRowSet. */ private Stack<Integer> keyColumnsStack = new Stack<Integer>(); /** * Keeps track of the "type" value while parsing the type map. */ private String mapType; /** * Keeps track of the "class" value while parsing the type map. */ private String mapClass; /** * This is the map of types, as parsed from the file. After the closing "map" tag is found, the * WebRowSet is updated. */ private Map<String,Class<?>> typeMap = new HashMap<String,Class<?>>(); /** * Contains the data value parsed from the <code>characters</code> method. This is simply a string. * The <code>setValue</code> method is responsible for parsing this into an int, bool, etc. */ private String data; /** * Keeps track of whether the last tag read was null. */ private boolean wasNull; /** * This String is used while in the data portion of parsing. It is used as the first part of they * key in the cache for a row. */ private String tableName = ""; /** * This list maintains the rowValues as parsed from the file. After they are all parsed, * they are passed to the row. */ private Object[] rowValues; /** * The index of the current row being processed. This is 1 based */ private int currentRow = 0; public WebRowSetXMLHandler(DataTable table) { this.table = table; } public void comment(char[] ch, int start, int length) throws SAXEx