filelistnodelist.java

一个完整的XACML工程,学习XACML技术的好例子!

/*
* Copyright (c) 2006, University of Kent
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without 
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this 
* list of conditions and the following disclaimer.
* 
* 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. 
*
* 1. Neither the name of the University of Kent nor the names of its 
* contributors may be used to endorse or promote products derived from this 
* software without specific prior written permission. 
*
* 2. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS  
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
* PURPOSE ARE DISCLAIMED. 
*
* 3. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 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.
*
* 4. YOU AGREE THAT THE EXCLUSIONS IN PARAGRAPHS 2 AND 3 ABOVE ARE REASONABLE
* IN THE CIRCUMSTANCES.  IN PARTICULAR, YOU ACKNOWLEDGE (1) THAT THIS
* SOFTWARE HAS BEEN MADE AVAILABLE TO YOU FREE OF CHARGE, (2) THAT THIS
* SOFTWARE IS NOT "PRODUCT" QUALITY, BUT HAS BEEN PRODUCED BY A RESEARCH
* GROUP WHO DESIRE TO MAKE THIS SOFTWARE FREELY AVAILABLE TO PEOPLE WHO WISH
* TO USE IT, AND (3) THAT BECAUSE THIS SOFTWARE IS NOT OF "PRODUCT" QUALITY
* IT IS INEVITABLE THAT THERE WILL BE BUGS AND ERRORS, AND POSSIBLY MORE
* SERIOUS FAULTS, IN THIS SOFTWARE.
*
* 5. This license is governed, except to the extent that local laws
* necessarily apply, by the laws of England and Wales.
*/

/*
 * FileListNodeList.java - 20/07/2006
 */

package issrg.editor2.configurations;

import issrg.editor2.DomainPolicyEditor;
import issrg.editor2.WSDLandTAP.WSDDReader;
import issrg.utils.xml.NodeItemList;
import issrg.utils.xml.XMLEditor;
import java.awt.Component;
import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ResourceBundle;
import javax.swing.JFileChooser;
import javax.swing.JOptionPane;
import javax.swing.filechooser.FileFilter;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

/**
 * Provides a simple Interface for users to specify a list of files.
 *
 * @author Christian Azzopardi 
 */
public class FileListNodeList extends NodeItemList
{
    String fileExtension;
    Component parent;
    XMLEditor xmlED;
    String tagName;
    
    ResourceBundle rbl = ResourceBundle.getBundle("issrg/editor2/PEComponent_i18n");
    String errorHeader = rbl.getString("ErrorHeader"); //contains Error!
    String notValid1 = rbl.getString("FileListNodeList_Not_Valid1"); //contains Not valid TAP File Format.
    String notValid2 = rbl.getString("FileListNodeList_Not_Valid2"); //contains File already Added.
    String notValid3 = rbl.getString("FileListNodeList_Not_Valid3"); //Contains No Services To Load/Use
    
    /** Creates a new instance of FileListNodeList */
    public FileListNodeList(XMLEditor that, String fileExtension, Component parent, String tagName) 
    {
        super(that);
        this.xmlED = that;
        this.fileExtension = fileExtension;
        this.parent = parent;
        this.tagName = tagName;
        
        replaceButton.setEnabled(true);
        xmlED.addXMLChangeListener(this);
    }
    
    public boolean fileAdded(Element toAdd)
    {
        NodeList nlist = DomainPolicyEditor.getChildElements((Element)getParentNode());
        for (int i=0; i<nlist.getLength(); i++)
        {
            if (((Element)nlist.item(i)).getAttribute("FilePath").intern().equalsIgnoreCase(toAdd.getAttribute("FilePath")))
                return true;    
        }
        return false;
    }
    
    public void addItem()
    {
        JFileChooser chooser = new JFileChooser();
        
        FileFilter ff = new FileFilter() {
            public boolean accept(File f) {
                return f.getName().toLowerCase().endsWith(fileExtension)
                || f.isDirectory();
            }
          
            public String getDescription() {
                if (fileExtension.equals(".wsdd")) return "WSDD files (*.wsdd)";  
                else if (fileExtension.equals(".tap")) return "TAP files (*.tap)";  
                else return "All Files (*.*)";
            }
        };
        
        //URLHandler urlhandler = new URLHandler("http", 80);
        
        chooser.setFileFilter(ff);
        chooser.setCurrentDirectory(new File("."));
        int returnVal = chooser.showOpenDialog(parent);
        if(returnVal == JFileChooser.APPROVE_OPTION) 
        {
            if (chooser.getSelectedFile().exists())               
            {     
                Element child = null;
                if (fileExtension.equals(".wsdd"))
                {
                    child = xmlED.DOM.createElement("WSDD");
                    WSDDReader wsdd = new WSDDReader(chooser.getSelectedFile().getAbsolutePath());
                    if (wsdd.getServiceNodeList().getLength() == 0)
                    {
                        JOptionPane.showMessageDialog(null, notValid3, errorHeader, JOptionPane.ERROR_MESSAGE);
                        return;
                    }
                }  
                else if (fileExtension.equals(".tap")) 
                {
                    child = xmlED.DOM.createElement("TAP");
                    String schemaPath = FileListNodeList.class.getClassLoader().getResource("issrg/editor2/tap.xsd").toExternalForm();
                    TAPFileParser tapParser = new TAPFileParser(chooser.getSelectedFile().getAbsolutePath(), schemaPath);
                    if (tapParser.validateDocument() == false)
                    {
                        JOptionPane.showMessageDialog(null, notValid1 + "\n" + tapParser.getErrorMessage(), errorHeader, JOptionPane.ERROR_MESSAGE);
                        return;
                    }
                }
                try{
                child.setAttribute("FilePath", chooser.getSelectedFile().toURL().toExternalForm());
                }
                catch(MalformedURLException ex)
                {
                    return;
                }
                if (!fileAdded(child)) xmlED.addItem(child, (Element)getParentNode());
                else JOptionPane.showMessageDialog(null, notValid2, errorHeader, JOptionPane.ERROR_MESSAGE);
            }                      
            else
            {
                JOptionPane.showMessageDialog(null, "Please Enter a valid FileName", errorHeader, JOptionPane.ERROR_MESSAGE);
            }                
        }  
        else                                                //user hits cancel button from fc dialog
        {                                                   
             return;                                          //will return .. thus not creating new policy
        }
    }
    
    public void deleteItem()
    {
        if (this.getSelectedNode() != null)
        {  
            xmlED.deleteItem((Element)this.getSelectedNode(), ((Element)getParentNode()));
        }
    }
    
    public void replaceItem()
    {
        ResourceBundle rbl = ResourceBundle.getBundle("issrg/editor2/PEComponent_i18n");
        String str = JOptionPane.showInputDialog(this, rbl.getString("AddHTTPWSDL_Message"), rbl.getString("AddHTTPWSDL_Title"), JOptionPane.QUESTION_MESSAGE);
        if (str == null) return;
        
        try{ 
        URL url = new URL(str);
        }
        catch(MalformedURLException me) {
            str = "";
        }
        
        if (!str.intern().equals(""))
        {   
            Element child = xmlED.DOM.createElement("WSDD");
            child.setAttribute("FilePath", str);
            xmlED.addItem(child, (Element)getParentNode());
        }                      
        else
        {
            JOptionPane.showMessageDialog(null, "Please Enter a valid Path", "Error", JOptionPane.ERROR_MESSAGE);
        }
    }
    
    public void refreshView()
    {
        if (getParentNode() != null)
        {            
            
            NodeList nlist = null;
            if (fileExtension.equals(".wsdd")) nlist = ((Element)getParentNode()).getElementsByTagName("WSDD");
            else if (fileExtension.equals(".tap")) nlist = ((Element)getParentNode()).getElementsByTagName("TAP");
            String filePaths[] = new String[nlist.getLength()];
            
            for (int i = 0 ; i < nlist.getLength(); i++)
            {
                Node n = nlist.item(i);   
                filePaths[i] = (((Element)n).getAttribute("FilePath"));
            }
            setNodeList(nlist, filePaths);
        }
        replaceButton.setEnabled(true);
    }

    /**
     * The root node of the Current Document.
     *
     * @return   a node with the root Element of the 'pe.cfg' XML file.
     */
    public Node getParentNode()
    {
        NodeList nlist = xmlED.DOM.getElementsByTagName("ApplicationSettings").item(0).getChildNodes();
        for (int i=0; i<nlist.getLength(); i++)
        {
            if (nlist.item(i).getNodeType() == Node.ELEMENT_NODE && ((Element)nlist.item(i)).getTagName().equals(this.tagName))
                return nlist.item(i);
        }
        return null;
    }     
    
    public void itemSelected()
    {
        super.itemSelected();
        replaceButton.setEnabled(true);
    }
}