[Babeldoc-devel] babeldoc/modules/jfreereports/src/com/babeldoc/utils XMLTableModel.java,NONE,1.1.2.1

[<mic...@us...>]

Update of /cvsroot/babeldoc/babeldoc/modules/jfreereports/src/com/babeldoc/utils
In directory sc8-pr-cvs1:/tmp/cvs-serv16985/modules/jfreereports/src/com/babeldoc/utils

Added Files:
      Tag: TEMP_MIKEA
	XMLTableModel.java 
Log Message:
New table model for XML files using XPath

--- NEW FILE: XMLTableModel.java ---
/*
 * Created on 19-Nov-2003
 *
 * To change the template for this generated file go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
package com.babeldoc.utils;

import com.babeldoc.core.LogService;

import com.babeldoc.core.I18n;
import java.lang.reflect.Constructor;

import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableModel;
import javax.xml.transform.TransformerException;

import org.apache.xpath.XPathAPI;

import org.w3c.dom.Document;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.traversal.NodeIterator;

import org.dom4j.io.DOMWriter;
import org.dom4j.DocumentException;

/**
 * @author mikea
 *
 * To change the template for this generated type comment go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
public class XMLTableModel extends AbstractTableModel implements TableModel {
	private static LogService log =
		LogService.getInstance(XMLTableModel.class.getName());

	public static final String XML_MIME_TYPE = "text/xml";
	public static final String QUERY_RESULTS = "queryresults";
	public static final String QUERY = "query";
	public static final String QUERY_NAME = "query-name";
	public static final String QUERY_NUMBER = "query-number";
	public static final String ROW = "row";
	public static final String ROW_NUMBER = "row-number";
	public static final String COLUMN = "column";
	public static final String COLUMN_NAME = "column-name";
	public static final String COLUMN_NUMBER = "column-number";
	public static final String COLUMN_CLASS = "column-class";
	public static final String DEFAULT_CLASS = "java.lang.String";
	
	private Document xmlData;
	private boolean gotColumnCount = false;
	private int columnCount;
	private boolean gotRowCount = false;
	private int rowCount;
	
	public XMLTableModel() {
		xmlData = null;
	}
	
	public XMLTableModel(org.dom4j.Document data) throws org.dom4j.DocumentException {
		xmlData = transformToDOM(data);
	}
	
	public void setDocument(org.dom4j.Document doc) throws org.dom4j.DocumentException {
		xmlData = transformToDOM(doc);
	}

	/* (non-Javadoc)
	 * @see javax.swing.table.TableModel#getColumnCount()
	 */
	public int getColumnCount() {
    
		if (xmlData == null) return (0);

		if (gotColumnCount) return (columnCount);
		
		// This is the xpath for the count of columns in the first row
		String xpath = "count(" + 
								QUERY_RESULTS + "/" + 
								ROW + "[1]/" + 
								COLUMN +
								")";
		
		Node n;
		try {
			n = XPathAPI.selectSingleNode(xmlData, xpath);
		} catch (TransformerException e) {
			log.logError(e);
			return (-1);
		}

		// Get the result value from the node and cache
		columnCount = new Integer(n.getNodeValue()).intValue();
		gotColumnCount = true;
		
		return (columnCount);
	}

	/* (non-Javadoc)
	 * @see javax.swing.table.TableModel#getRowCount()
	 */
	public int getRowCount() {
    
		if (xmlData == null) return (0);

		if (gotRowCount) return (rowCount);
		
		// This is the xpath for the count of columns in the first row
		String xpath = "count(" + 
								QUERY_RESULTS + "/" + 
								ROW +  
								")";
		
		Node n;
		try {
			n = XPathAPI.selectSingleNode(xmlData, xpath);
		} catch (TransformerException e) {
			log.logError(e);
			return (-1);
		}

		// Get the result value from the node and cache
		rowCount = new Integer(n.getNodeValue()).intValue();
		gotRowCount = true;

		return (rowCount);
	}

	/* (non-Javadoc)
	 * @see javax.swing.table.TableModel#getValueAt(int, int)
	 */
	public Object getValueAt(int rowIndex, int columnIndex) {

		if (xmlData == null) return (null);

		// This is the xpath for a cell in an XML data document from the SqlQuery 
		// pipeline stage
		String xpath = QUERY_RESULTS + "/" + 
								ROW + "[@" + ROW_NUMBER + "=" + rowIndex + "]/" + 
								COLUMN + "[@" + COLUMN_NUMBER + "=" + columnIndex + "]";
		
		Node n;
		try {
			n = XPathAPI.selectSingleNode(xmlData, xpath);
		} catch (TransformerException e) {
			log.logError(e);
			return null;
		}

		NamedNodeMap attrs = n.getAttributes();
		String className = attrs.getNamedItem(COLUMN_CLASS).getNodeValue();
		if (className == null || className.equals("")) {
			className = DEFAULT_CLASS;
		}
		
		Object v;
		try {
			Class c = Class.forName(className).getClass();
			Constructor  cons = c.getConstructor(new Class[] {String.class});
			v = cons.newInstance(new Object[] {n.getNodeValue()});
		} catch (Exception e) {
			log.logWarn(e.getMessage());
			v = new String("[" + I18n.get("jfr.104", className) + "]");
		}
		
		return v;
	}

	private org.w3c.dom.Document transformToDOM(org.dom4j.Document doc) throws DocumentException {
		DOMWriter writer = new DOMWriter();
		return writer.write(doc);
	}
}