writetopolicy.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.
 */

/*
 * WriteToPolicy.java - 04/08/2006
 */

package issrg.policywizard.xmlTools;

import issrg.editor2.ReadablePERMISXML;
import issrg.policywizard.PWizard;
import issrg.policywizard.PermisPolicyWizard_WestPanel;
import issrg.utils.xml.XMLEditorInstantiable;
import java.awt.BorderLayout;
import java.awt.Cursor;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ResourceBundle;
import javax.swing.JComboBox;
import javax.swing.JDialog;
import javax.swing.JFileChooser;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.filechooser.FileFilter;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.apache.xml.serialize.LineSeparator;
import org.apache.xml.serialize.OutputFormat;
import org.apache.xml.serialize.XMLSerializer;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;

/**
 * This class stores the XMLEditor for the policywizard. 
 * This keeps a reference to the XML policy we are creating. 
 * <p>
 * It deals with the writing the particular chunks of Pemis policy following
 * particular user selections in the policy wizard. 
 * <p>
 * It also contains the saving mechanism to save the policy to disk.
 * 
 * @author Christian Azzopardi
 */
public class WriteToPolicy extends JPanel implements ActionListener {
    public XMLEditorInstantiable policyDocument = new XMLEditorInstantiable();
    
    private JLabel titleLabel;
    private PWizard pwiz;
    
    ReadablePERMISXML viewXML;
    
    ResourceBundle rbl = ResourceBundle.getBundle("issrg/policywizard/PWApplication_i18n");
    String slideTitle = rbl.getString("Wizard_End_Title"); //contains Policy Is Ready! <P> Click on Save to Save and Exit
    String readableCaption = rbl.getString("Wizard_End_Policy_Type"); //contains Type of Policy:
    
    /** 
     * Creates a new instance of WriteToPolicy 
     */
    public WriteToPolicy(PWizard pwiz) {
        this.pwiz = pwiz;
        pwiz.bbp.closeButton.setEnabled(false);
        pwiz.setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
        titleLabel = new JLabel("<HTML><B>" + slideTitle + "</B></HTML>");
        
        this.setLayout(new BorderLayout());
        this.add(new PermisPolicyWizard_WestPanel(), BorderLayout.WEST);
        this.add(getContentPanel(), BorderLayout.CENTER);
        
        loadEmptyDoc();
        pwiz.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
        pwiz.bbp.closeButton.setEnabled(true);
    }
    
    /**
     * Instantiates the GUI this component displays. 
     * Contains a dropdown list to select the type of policy the user wants to 
     * view (readable/xml), and ReadablePERMISXML component.
     *
     * @return  a JPanel with the GUI of this component. 
     */
    public JPanel getContentPanel() {
        JPanel createPolicy = new JPanel(new BorderLayout());
        createPolicy.setBackground(PWizard.bgcolor);
        createPolicy.add(titleLabel, BorderLayout.NORTH);
        
        viewXML = new ReadablePERMISXML(null, "", "text/html");
        
        JLabel readableLabel = new JLabel(readableCaption);
        readableLabel.setBackground(PWizard.bgcolor);
        
        JPanel tmpPanel = new JPanel(new BorderLayout());
        JComboBox combo = new JComboBox();
        combo.addItem("Readable Policy");
        combo.addItem("XML");
        combo.addActionListener(this);
        JPanel flowPanel = new JPanel(new FlowLayout());
        flowPanel.add(readableLabel);
        flowPanel.add(combo);
        flowPanel.setBackground(PWizard.bgcolor);
        
        tmpPanel.add(flowPanel, BorderLayout.NORTH);
        tmpPanel.add(viewXML, BorderLayout.CENTER);
        
        createPolicy.add(tmpPanel, BorderLayout.CENTER);
        
        return createPolicy;
    }
    
    /**
     * Loads an empty PERMIS Policy, with the valid 8 subpolicy Tags.
     */
    public void loadEmptyDoc() {
        InputSource is = new InputSource(WriteToPolicy.class.getClassLoader().getResourceAsStream("issrg/policywizard/empty.xml"));
        
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        try {
            DocumentBuilder builder = factory.newDocumentBuilder();
            this.policyDocument.DOM = builder.parse(is);
        } catch (SAXException sxe) { } catch (ParserConfigurationException pce) { } catch (IOException ioe) { } catch (SecurityException se) { }
    }
    
    /**
     * Write the Subject Policy, when the users option is anywhere. 
     * 
     * This will delete any users defined domains, and then create 
     * a new Element with an LDAP DN of null.
     */
    public void writeSubjectPolicy() {
        //delete any SubjetSpecs...
        Element e = (Element)this.policyDocument.DOM.getElementsByTagName("SubjectPolicy").item(0);
        NodeList subjectSpecs = e.getElementsByTagName("SubjectDomainSpec");
        for (int i=subjectSpecs.getLength()-1; i>=0; i--) {
            this.policyDocument.deleteItem((Element)subjectSpecs.item(i), e);
        }
        Element child = this.policyDocument.DOM.createElement("SubjectDomainSpec");
        child.setAttribute("ID", rbl.getString("Slide3_Option_Anywhere"));
        Element include = this.policyDocument.DOM.createElement("Include");
        include.setAttribute("LDAPDN", "");
        child.appendChild((Node)include);

        Element subjectDomain = (Element)this.policyDocument.DOM.getDocumentElement().getElementsByTagName("SubjectPolicy").item(0);
        this.policyDocument.addItem(child, subjectDomain);
    }

    /**
     * Writes the Target Policy.
     */
    public void writeTargetPolicy() {
        //delete any....
        Element e = (Element)this.policyDocument.DOM.getElementsByTagName("TargetPolicy").item(0);