xmltablecolumndefinition.java

Java的面向对象数据库系统的源代码

/*
 * Copyright 2001 (C) MetaStuff, Ltd. All Rights Reserved.
 * 
 * This software is open source. 
 * See the bottom of this file for the licence.
 * 
 * $Id: XMLTableColumnDefinition.java,v 1.2 2003/06/10 16:18:35 per_nyfelt Exp $
 */

package org.dom4j.swing;

import org.dom4j.DocumentHelper;
import org.dom4j.Node;
import org.dom4j.XPath;

import java.io.Serializable;

/** <p><code>XMLTableColumnDefinition</code> a column
  * within a table definition.</p>
  *
  * @author <a href="mailto:[e-mail]">James Strachan</a>
  * @version $Revision: 1.2 $ 
  */
public class XMLTableColumnDefinition implements Serializable {

    public static final int OBJECT_TYPE = 0;
    public static final int STRING_TYPE = 1;
    public static final int NUMBER_TYPE = 2;
    public static final int NODE_TYPE = 3;
    
    /** Holds value of property type. */
    private int type;
    
    /** Holds value of property name. */
    private String name;
    
    /** Holds value of property xpath. */
    private XPath xpath;
    
    /** Holds the XPath used for the column name */
    private XPath columnNameXPath;

    public static int parseType(String typeName) {
        if ( typeName != null && typeName.length() > 0 ) {
            if ( typeName.equals( "string" ) ) {
                return STRING_TYPE;
            }
            else if ( typeName.equals( "number" ) ) {
                return NUMBER_TYPE;
            }
            else if ( typeName.equals( "node" ) ) {
                return NODE_TYPE;
            }
        }
        return OBJECT_TYPE;
    }
    
    public XMLTableColumnDefinition() {
    }
    
    public XMLTableColumnDefinition(String name, String expression, int type) {
        this.name = name;
        this.type = type;
        this.xpath = createXPath(expression);
    }
    
    public XMLTableColumnDefinition(String name, XPath xpath, int type) {
        this.name = name;
        this.xpath = xpath;
        this.type = type;
    }
    
    public XMLTableColumnDefinition(XPath columnNameXPath, XPath xpath, int type) {
        this.xpath = xpath;
        this.columnNameXPath = columnNameXPath;
        this.type = type;
    }
    
    
    public Class getColumnClass() {
        switch (type) {
            case STRING_TYPE:
                return String.class;
            case NUMBER_TYPE:
                return Number.class;
            case NODE_TYPE:
                return Node.class;
            default:
                return Object.class;
        }
    }
    
    public Object getValue(Object row) {
        switch (type) {
            case STRING_TYPE:
                return xpath.valueOf( row );
            case NUMBER_TYPE:
                return xpath.numberValueOf( row );
            case NODE_TYPE:
                return xpath.selectSingleNode( row );
            default:
                return xpath.evaluate( row );
        }
    }
    
    // Properties
    //-------------------------------------------------------------------------                
    
    /** Getter for property type.
     * @return Value of property type.
     */
    public int getType() {
        return type;
    }
    
    /** Setter for property type.
     * @param type New value of property type.
     */
    public void setType(int type) {
        this.type = type;
    }
    
    /** Getter for property name.
     * @return Value of property name.
     */
    public String getName() {
        return name;
    }
    
    /** Setter for property name.
     * @param name New value of property name.
     */
    public void setName(String name) {
        this.name = name;
    }
    
    /** Getter for property xpath.
     * @return Value of property xpath.
     */
    public XPath getXPath() {
        return xpath;
    }
    
    /** Setter for property xpath.
     * @param xpath New value of property xpath.
     */
    public void setXPath(XPath xpath) {
        this.xpath = xpath;
    }
    
    /** 
     * @return the XPath used to create the column name
     */
    public XPath getColumnNameXPath() {
        return columnNameXPath;
    }
    
    /** Setter for property xpath.
     * @param xpath New value of property xpath.
     */
    public void setColumnNameXPath(XPath columnNameXPath) {
        this.columnNameXPath = columnNameXPath;
    }
    
    // Implementation methods
    //-------------------------------------------------------------------------                
    protected XPath createXPath(String expression) {
        return DocumentHelper.createXPath(expression);
    }
        
    protected void handleException(Exception e) {
        // #### should use jakarta commons-logging
        System.out.println( "Caught: " + e );
    }
}




/*
 * Redistribution and use of this software and associated documentation
 * ("Software"), with or without modification, are permitted provided
 * that the following conditions are met:
 *
 * 1. Redistributions of source code must retain copyright
 *    statements and notices.  Redistributions must also contain a
 *    copy of this document.
 *
 * 2. Redistributions in binary form must reproduce the
 *    above copyright notice, this list of conditions and the
 *    following disclaimer in the documentation and/or other
 *    materials provided with the distribution.
 *
 * 3. The name "DOM4J" must not be used to endorse or promote
 *    products derived from this Software without prior written
 *    permission of MetaStuff, Ltd.  For written permission,
 *    please contact [e-mail].
 *
 * 4. Products derived from this Software may not be called "DOM4J"
 *    nor may "DOM4J" appear in their names without prior written
 *    permission of MetaStuff, Ltd. DOM4J is a registered
 *    trademark of MetaStuff, Ltd.
 *
 * 5. Due credit should be given to the DOM4J Project
 *    (http://dom4j.org/).
 *
 * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
 * METASTUFF, LTD. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Copyright 2001 (C) MetaStuff, Ltd. All Rights Reserved.
 *
 * $Id: XMLTableColumnDefinition.java,v 1.2 2003/06/10 16:18:35 per_nyfelt Exp $
 */