bundles/org.eclipse.equinox.security.ui/src/org/eclipse/equinox/internal/security/ui/preferences/AdvancedPage.java - equinox/rt.equinox.bundles - Git at Google

 /*******************************************************************************
  * Copyright (c) 2005, 2009 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.equinox.internal.security.ui.preferences;

 import java.security.Provider;
 import java.security.Security;
 import java.util.*;
 import java.util.List;
 import org.eclipse.equinox.internal.security.ui.SecurityUIMsg;
 import org.eclipse.jface.preference.PreferencePage;
 import org.eclipse.jface.viewers.*;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.layout.*;
 import org.eclipse.swt.widgets.*;
 import org.eclipse.ui.IWorkbench;
 import org.eclipse.ui.IWorkbenchPreferencePage;
 import org.osgi.framework.Bundle;

 public class AdvancedPage extends PreferencePage implements IWorkbenchPreferencePage {

 	private static final String ALG_ALIAS = "Alg.Alias."; //$NON-NLS-1$
 	private static final String PROVIDER = "Provider."; //$NON-NLS-1$

 	TreeViewer providerViewer;
 	Combo providerCombo;
 	Label versionText;
 	Label descriptionText;

 	public AdvancedPage() {
 		//empty
 	}

 	public void init(IWorkbench workbench) {
 		this.noDefaultAndApplyButton();
 	}

 	protected Control createContents(Composite parent) {

 		Composite area = new Composite(parent, SWT.NONE);
 		area.setLayout(new FormLayout());

 		Label providerLabel = new Label(area, SWT.NONE);
 		providerLabel.setText(SecurityUIMsg.ADVPAGE_LABEL_PROVIDER);
 		FormData data = new FormData();
 		data.top = new FormAttachment(0, 0);
 		providerLabel.setData(data);

 		providerCombo = new Combo(area, SWT.DROP_DOWN | SWT.READ_ONLY);
 		data = new FormData();
 		data.top = new FormAttachment(0, 0);
 		data.left = new FormAttachment(providerLabel, 0);
 		//data.right = new FormAttachment(100, 0);
 		//data.height = 5 * providerCombo.getItemHeight();
 		data.width = 100;
 		providerCombo.setLayoutData(data);

 		Provider[] providers = Security.getProviders();
 		for (int i = 0; i < providers.length; i++) {
 			providerCombo.add(i + ": " + providers[i].getName()); //$NON-NLS-1$
 		}
 		providerCombo.setVisibleItemCount(providers.length);
 		providerCombo.addListener(SWT.Selection, new Listener() {
 			public void handleEvent(Event event) {
 				Provider provider = Security.getProviders()[providerCombo.getSelectionIndex()];
 				providerViewer.setInput(getContent(provider));
 				versionText.setText(String.valueOf(provider.getVersion()));
 				descriptionText.setText(provider.getInfo());
 			}
 		});

 		/*
 		Link link = new Link(area, SWT.NONE);
 		link.setText(SecurityUIMsg.ADVPAGE_LABEL_LINK);
 		link.addListener(SWT.Selection, new Listener() {
 			public void handleEvent(Event event) {
 				//todo
 			}
 		});

 		data = new FormData();
 		data.top = new FormAttachment(0, 0);
 		data.right = new FormAttachment(100, 0);
 		link.setLayoutData(data);
 		*/

 		Label versionLabel = new Label(area, SWT.NONE);
 		versionLabel.setText(SecurityUIMsg.ADVPAGE_LABEL_VERSION);
 		data = new FormData();
 		data.top = new FormAttachment(providerCombo, 0);
 		data.left = new FormAttachment(0, 0);
 		versionLabel.setLayoutData(data);

 		versionText = new Label(area, SWT.NONE);
 		data = new FormData();
 		data.top = new FormAttachment(providerCombo, 0);
 		data.left = new FormAttachment(versionLabel, 0);
 		data.right = new FormAttachment(100, 0);
 		versionText.setLayoutData(data);

 		Label descriptionLabel = new Label(area, SWT.NONE);
 		descriptionLabel.setText(SecurityUIMsg.ADVPAGE_LABEL_DESCRIPTION);
 		data = new FormData();
 		data.top = new FormAttachment(versionLabel, 0);
 		data.left = new FormAttachment(0, 0);
 		descriptionLabel.setLayoutData(data);

 		descriptionText = new Label(area, SWT.NONE);
 		data = new FormData();
 		data.top = new FormAttachment(versionText, 0);
 		data.left = new FormAttachment(versionLabel, 0);
 		data.right = new FormAttachment(100, 0);
 		data.width = 250;
 		descriptionText.setLayoutData(data);

 		Group serviceGroup = new Group(area, SWT.NONE);
 		serviceGroup.setText(SecurityUIMsg.ADVPAGE_LABEL_SERVICES);
 		data = new FormData();
 		data.top = new FormAttachment(descriptionLabel, 0);
 		data.bottom = new FormAttachment(100, 0);
 		data.left = new FormAttachment(0, 0);
 		data.right = new FormAttachment(100, 0);
 		serviceGroup.setLayoutData(data);

 		serviceGroup.setLayout(new FormLayout());

 		providerViewer = new TreeViewer(serviceGroup);
 		providerViewer.setContentProvider(new ProviderContentProvider());
 		providerViewer.setLabelProvider(new ProviderLabelProvider());
 		Tree tree = (Tree) providerViewer.getControl();

 		data = new FormData();
 		data.top = new FormAttachment(0, 5);
 		data.left = new FormAttachment(0, 5);
 		data.right = new FormAttachment(100, -5);
 		data.bottom = new FormAttachment(100, -5);
 		data.height = (10 * tree.getItemHeight()) + tree.getHeaderHeight();
 		providerViewer.getControl().setLayoutData(data);

 		providerCombo.select(0);
 		Provider provider = Security.getProviders()[0];
 		providerViewer.setInput(getContent(provider));
 		versionText.setText(String.valueOf(provider.getVersion()));
 		descriptionText.setText(provider.getInfo());

 		return area;
 	}

 	Object[] getContent(Provider provider) {

 		Set providerKeys = provider.keySet();
 		Hashtable serviceList = new Hashtable();
 		Hashtable attributeMap = new Hashtable(); // "type" => "Hashtable of (attribute,value) pairs"
 		Hashtable aliasMap = new Hashtable(); // "type" => "Arraylist of aliases"
 		for (Iterator it = providerKeys.iterator(); it.hasNext();) {
 			String key = (String) it.next();

 			// this is provider info, available off the Provider API
 			if (key.startsWith(PROVIDER)) {
 				continue;
 			}

 			// this is an alias
 			if (key.startsWith(ALG_ALIAS)) {
 				String value = key.substring(key.indexOf(ALG_ALIAS) + ALG_ALIAS.length(), key.length());
 				String type = (String) provider.get(key);
 				String algo = value.substring(0, value.indexOf('.'));
 				String alias = value.substring(value.indexOf('.') + 1, value.length());
 				ArrayList aliasList = (ArrayList) aliasMap.get(type + '.' + algo);
 				if (aliasList == null) {
 					aliasList = new ArrayList();
 					aliasList.add(alias);
 					aliasMap.put(type, aliasList);
 				} else {
 					aliasList.add(alias);
 				}
 			}

 			// this is an attribute
 			else if (key.indexOf(' ') > -1) {
 				String type = key.substring(0, key.indexOf('.'));
 				String algorithm = key.substring(key.indexOf('.') + 1, key.indexOf(' '));
 				String attribute = key.substring(key.indexOf(' ') + 1, key.length());
 				String value = (String) provider.get(key);
 				Hashtable attributeTable = (Hashtable) attributeMap.get(type + '.' + algorithm);
 				if (attributeTable == null) {
 					attributeTable = new Hashtable();
 					attributeTable.put(attribute, value);
 					attributeMap.put(type + '.' + algorithm, attributeTable);
 				} else {
 					attributeTable.put(attribute, value);
 				}
 			}

 			// else this is a service
 			else {
 				serviceList.put(key, provider.get(key));
 			}
 		}

 		ProviderService[] serviceArray = new ProviderService[serviceList.size()];
 		Set serviceKeys = serviceList.keySet();
 		int serviceCount = 0;
 		for (Iterator it = serviceKeys.iterator(); it.hasNext();) {
 			String key = (String) it.next();
 			String type = key.substring(0, key.indexOf('.'));
 			String algo = key.substring(key.indexOf('.') + 1, key.length());
 			String className = (String) serviceList.get(key);
 			List aliases = (List) aliasMap.get(algo);
 			Map attributes = (Map) attributeMap.get(key);

 			serviceArray[serviceCount] = new ProviderService(type, algo, className, aliases, attributes, null);
 			serviceCount++;
 		}

 		// sort the provider services
 		Arrays.sort(serviceArray, new Comparator() {
 			public int compare(Object arg0, Object arg1) {
 				ProviderService s0 = (ProviderService) arg0;
 				ProviderService s1 = (ProviderService) arg1;
 				return s0.getType().compareTo(s1.getType());
 			}
 		});

 		return serviceArray;
 	}

 	class ProviderContentProvider implements ITreeContentProvider {

 		public Object[] getElements(Object inputElement) {
 			Object[] returnValue = null;
 			if (inputElement instanceof ProviderService[]) {
 				returnValue = (Object[]) inputElement;
 			}
 			return returnValue;
 		}

 		public Object getParent(Object element) {
 			Object returnValue = null;
 			if (element instanceof ProviderServiceDetail) {
 				returnValue = ((ProviderServiceDetail) element).getParent();
 			}
 			return returnValue;
 		}

 		public Object[] getChildren(Object parentElement) {
 			Object[] returnValue = null;
 			if (parentElement instanceof ProviderService) {
 				ProviderService service = (ProviderService) parentElement;
 				ArrayList detailList = new ArrayList();
 				detailList.add(new ProviderServiceDetail(service, TYPE_CLASSNAME, service.getClassName()));
 				if (service.getAliases() != null) {
 					detailList.add(new ProviderServiceDetail(service, TYPE_ALIASES, service.getAliases()));
 				}
 				if (service.getAttributes() != null) {
 					detailList.add(new ProviderServiceDetail(service, TYPE_ATTRIBUTES, service.getAttributes()));
 				}
 				returnValue = detailList.toArray(new ProviderServiceDetail[] {});
 			} else if (parentElement instanceof ProviderServiceDetail) {
 				returnValue = ((ProviderServiceDetail) parentElement).getChildren();
 			}
 			return returnValue;
 		}

 		public boolean hasChildren(Object element) {
 			boolean returnValue = false;
 			if (element instanceof ProviderService) {
 				returnValue = true;
 			} else if (element instanceof ProviderServiceDetail) {
 				returnValue = ((ProviderServiceDetail) element).hasChildren();
 			}
 			return returnValue;
 		}

 		public void dispose() {
 			//nothing to do
 		}

 		public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
 			//empty
 		}
 	}

 	class ProviderLabelProvider implements ILabelProvider {

 		public Image getImage(Object element) {
 			return null;
 		}

 		public String getText(Object element) {
 			String returnValue = null;
 			if (element instanceof String) {
 				returnValue = (String) element;
 			} else if (element instanceof ProviderService) {
 				ProviderService service = (ProviderService) element;
 				returnValue = service.getType() + ": " + service.getAlgorithm(); //$NON-NLS-1$
 			} else if (element instanceof ProviderServiceDetail) {
 				ProviderServiceDetail detail = (ProviderServiceDetail) element;
 				returnValue = detail.toString();
 			} else if (element instanceof ProviderServiceAttribute) {
 				ProviderServiceAttribute attribute = (ProviderServiceAttribute) element;
 				returnValue = attribute.toString();
 			}
 			return returnValue;
 		}

 		public boolean isLabelProperty(Object element, String property) {
 			return false;
 		}

 		public void addListener(ILabelProviderListener listener) {
 			//empty
 		}

 		public void removeListener(ILabelProviderListener listener) {
 			//empty
 		}

 		public void dispose() {
 			//empty
 		}
 	}

 	private class ProviderService {
 		private final String type;
 		private final String algorithm;
 		private final String className;
 		private final List aliases;
 		private final Map attributes;

 		public ProviderService(String type, String algorithm, String className, List aliases, Map attributes, Bundle providingBundle) {
 			this.type = type;
 			this.algorithm = algorithm;
 			this.className = className;
 			this.aliases = aliases;
 			this.attributes = attributes;
 		}

 		public String getType() {
 			return type;
 		}

 		public String getAlgorithm() {
 			return algorithm;
 		}

 		public String getClassName() {
 			return className;
 		}

 		public List getAliases() {
 			return aliases;
 		}

 		public Map getAttributes() {
 			return attributes;
 		}
 	}

 	//	private static final int TYPE_ALGORITHM = 0;
 	//	private static final int TYPE_TYPE = 1;
 	//	private static final int TYPE_BUNDLEID = 2;
 	private static final int TYPE_CLASSNAME = 3;
 	private static final int TYPE_ALIASES = 4;
 	private static final int TYPE_ATTRIBUTES = 5;

 	private class ProviderServiceDetail {

 		ProviderService parent;
 		int type;
 		Object data;

 		ProviderServiceDetail(ProviderService parent, int type, Object data) {
 			this.parent = parent;
 			this.type = type;
 			this.data = data;
 		}

 		int getType() {
 			return type;
 		}

 		Object getData() {
 			return data;
 		}

 		ProviderService getParent() {
 			return parent;
 		}

 		public String toString() {
 			String returnValue = null;
 			switch (getType()) {
 				case TYPE_CLASSNAME :
 					returnValue = SecurityUIMsg.ADVPAGE_LABEL_CLASS + (String) getData();
 					break;

 				case TYPE_ALIASES :
 					StringBuffer buffer = new StringBuffer();
 					buffer.append(SecurityUIMsg.ADVPAGE_LABEL_ALIASES);
 					String[] aliases = (String[]) ((List) getData()).toArray(new String[] {});
 					for (int i = 0; i < aliases.length; i++) {
 						buffer.append(aliases[i]);
 						if (i < aliases.length - 1) {
 							buffer.append(", "); //$NON-NLS-1$
 						}
 					}
 					returnValue = buffer.toString();
 					break;

 				case TYPE_ATTRIBUTES :
 					returnValue = SecurityUIMsg.ADVPAGE_LABEL_ATTRIBUTES;
 					break;
 			}
 			return returnValue;
 		}

 		boolean hasChildren() {
 			boolean returnValue = false;
 			if (getType() == TYPE_ATTRIBUTES) {
 				returnValue = true;
 			}
 			return returnValue;
 		}

 		Object[] getChildren() {
 			Object[] returnValue = null;
 			if (getType() == TYPE_ATTRIBUTES) {
 				Map attributeMap = (Map) getData();
 				ArrayList attributeList = new ArrayList();
 				for (Iterator it = attributeMap.keySet().iterator(); it.hasNext();) {
 					String key = (String) it.next();
 					String value = (String) attributeMap.get(key);
 					attributeList.add(new ProviderServiceAttribute(key, value));
 				}
 				returnValue = attributeList.toArray(new ProviderServiceAttribute[] {});
 			}
 			return returnValue;
 		}
 	}

 	private class ProviderServiceAttribute {

 		String key;
 		String value;

 		public ProviderServiceAttribute(String key, String value) {
 			this.key = key;
 			this.value = value;
 		}

 		public String toString() {
 			return key + ": " + value; //$NON-NLS-1$
 		}
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2005, 2009 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.equinox.internal.security.ui.preferences;

	import java.security.Provider;
	import java.security.Security;
	import java.util.*;
	import java.util.List;
	import org.eclipse.equinox.internal.security.ui.SecurityUIMsg;
	import org.eclipse.jface.preference.PreferencePage;
	import org.eclipse.jface.viewers.*;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.graphics.Image;
	import org.eclipse.swt.layout.*;
	import org.eclipse.swt.widgets.*;
	import org.eclipse.ui.IWorkbench;
	import org.eclipse.ui.IWorkbenchPreferencePage;
	import org.osgi.framework.Bundle;

	public class AdvancedPage extends PreferencePage implements IWorkbenchPreferencePage {

	private static final String ALG_ALIAS = "Alg.Alias."; //$NON-NLS-1$
	private static final String PROVIDER = "Provider."; //$NON-NLS-1$

	TreeViewer providerViewer;
	Combo providerCombo;
	Label versionText;
	Label descriptionText;

	public AdvancedPage() {
	//empty
	}

	public void init(IWorkbench workbench) {
	this.noDefaultAndApplyButton();
	}

	protected Control createContents(Composite parent) {

	Composite area = new Composite(parent, SWT.NONE);
	area.setLayout(new FormLayout());

	Label providerLabel = new Label(area, SWT.NONE);
	providerLabel.setText(SecurityUIMsg.ADVPAGE_LABEL_PROVIDER);
	FormData data = new FormData();
	data.top = new FormAttachment(0, 0);
	providerLabel.setData(data);

	providerCombo = new Combo(area, SWT.DROP_DOWN \| SWT.READ_ONLY);
	data = new FormData();
	data.top = new FormAttachment(0, 0);
	data.left = new FormAttachment(providerLabel, 0);
	//data.right = new FormAttachment(100, 0);
	//data.height = 5 * providerCombo.getItemHeight();
	data.width = 100;
	providerCombo.setLayoutData(data);

	Provider[] providers = Security.getProviders();
	for (int i = 0; i < providers.length; i++) {
	providerCombo.add(i + ": " + providers[i].getName()); //$NON-NLS-1$
	}
	providerCombo.setVisibleItemCount(providers.length);
	providerCombo.addListener(SWT.Selection, new Listener() {
	public void handleEvent(Event event) {
	Provider provider = Security.getProviders()[providerCombo.getSelectionIndex()];
	providerViewer.setInput(getContent(provider));
	versionText.setText(String.valueOf(provider.getVersion()));
	descriptionText.setText(provider.getInfo());
	}
	});

	/*
	Link link = new Link(area, SWT.NONE);
	link.setText(SecurityUIMsg.ADVPAGE_LABEL_LINK);
	link.addListener(SWT.Selection, new Listener() {
	public void handleEvent(Event event) {
	//todo
	}
	});

	data = new FormData();
	data.top = new FormAttachment(0, 0);
	data.right = new FormAttachment(100, 0);
	link.setLayoutData(data);
	*/

	Label versionLabel = new Label(area, SWT.NONE);
	versionLabel.setText(SecurityUIMsg.ADVPAGE_LABEL_VERSION);
	data = new FormData();
	data.top = new FormAttachment(providerCombo, 0);
	data.left = new FormAttachment(0, 0);
	versionLabel.setLayoutData(data);

	versionText = new Label(area, SWT.NONE);
	data = new FormData();
	data.top = new FormAttachment(providerCombo, 0);
	data.left = new FormAttachment(versionLabel, 0);
	data.right = new FormAttachment(100, 0);
	versionText.setLayoutData(data);

	Label descriptionLabel = new Label(area, SWT.NONE);
	descriptionLabel.setText(SecurityUIMsg.ADVPAGE_LABEL_DESCRIPTION);
	data = new FormData();
	data.top = new FormAttachment(versionLabel, 0);
	data.left = new FormAttachment(0, 0);
	descriptionLabel.setLayoutData(data);

	descriptionText = new Label(area, SWT.NONE);
	data = new FormData();
	data.top = new FormAttachment(versionText, 0);
	data.left = new FormAttachment(versionLabel, 0);
	data.right = new FormAttachment(100, 0);
	data.width = 250;
	descriptionText.setLayoutData(data);

	Group serviceGroup = new Group(area, SWT.NONE);
	serviceGroup.setText(SecurityUIMsg.ADVPAGE_LABEL_SERVICES);
	data = new FormData();
	data.top = new FormAttachment(descriptionLabel, 0);
	data.bottom = new FormAttachment(100, 0);
	data.left = new FormAttachment(0, 0);
	data.right = new FormAttachment(100, 0);
	serviceGroup.setLayoutData(data);

	serviceGroup.setLayout(new FormLayout());

	providerViewer = new TreeViewer(serviceGroup);
	providerViewer.setContentProvider(new ProviderContentProvider());
	providerViewer.setLabelProvider(new ProviderLabelProvider());
	Tree tree = (Tree) providerViewer.getControl();

	data = new FormData();
	data.top = new FormAttachment(0, 5);
	data.left = new FormAttachment(0, 5);
	data.right = new FormAttachment(100, -5);
	data.bottom = new FormAttachment(100, -5);
	data.height = (10 * tree.getItemHeight()) + tree.getHeaderHeight();
	providerViewer.getControl().setLayoutData(data);

	providerCombo.select(0);
	Provider provider = Security.getProviders()[0];
	providerViewer.setInput(getContent(provider));
	versionText.setText(String.valueOf(provider.getVersion()));
	descriptionText.setText(provider.getInfo());

	return area;
	}

	Object[] getContent(Provider provider) {

	Set providerKeys = provider.keySet();
	Hashtable serviceList = new Hashtable();
	Hashtable attributeMap = new Hashtable(); // "type" => "Hashtable of (attribute,value) pairs"
	Hashtable aliasMap = new Hashtable(); // "type" => "Arraylist of aliases"
	for (Iterator it = providerKeys.iterator(); it.hasNext();) {
	String key = (String) it.next();

	// this is provider info, available off the Provider API
	if (key.startsWith(PROVIDER)) {
	continue;
	}

	// this is an alias
	if (key.startsWith(ALG_ALIAS)) {
	String value = key.substring(key.indexOf(ALG_ALIAS) + ALG_ALIAS.length(), key.length());
	String type = (String) provider.get(key);
	String algo = value.substring(0, value.indexOf('.'));
	String alias = value.substring(value.indexOf('.') + 1, value.length());
	ArrayList aliasList = (ArrayList) aliasMap.get(type + '.' + algo);
	if (aliasList == null) {
	aliasList = new ArrayList();
	aliasList.add(alias);
	aliasMap.put(type, aliasList);
	} else {
	aliasList.add(alias);
	}
	}

	// this is an attribute
	else if (key.indexOf(' ') > -1) {
	String type = key.substring(0, key.indexOf('.'));
	String algorithm = key.substring(key.indexOf('.') + 1, key.indexOf(' '));
	String attribute = key.substring(key.indexOf(' ') + 1, key.length());
	String value = (String) provider.get(key);
	Hashtable attributeTable = (Hashtable) attributeMap.get(type + '.' + algorithm);
	if (attributeTable == null) {
	attributeTable = new Hashtable();
	attributeTable.put(attribute, value);
	attributeMap.put(type + '.' + algorithm, attributeTable);
	} else {
	attributeTable.put(attribute, value);
	}
	}

	// else this is a service
	else {
	serviceList.put(key, provider.get(key));
	}
	}

	ProviderService[] serviceArray = new ProviderService[serviceList.size()];
	Set serviceKeys = serviceList.keySet();
	int serviceCount = 0;
	for (Iterator it = serviceKeys.iterator(); it.hasNext();) {
	String key = (String) it.next();
	String type = key.substring(0, key.indexOf('.'));
	String algo = key.substring(key.indexOf('.') + 1, key.length());
	String className = (String) serviceList.get(key);
	List aliases = (List) aliasMap.get(algo);
	Map attributes = (Map) attributeMap.get(key);

	serviceArray[serviceCount] = new ProviderService(type, algo, className, aliases, attributes, null);
	serviceCount++;
	}

	// sort the provider services
	Arrays.sort(serviceArray, new Comparator() {
	public int compare(Object arg0, Object arg1) {
	ProviderService s0 = (ProviderService) arg0;
	ProviderService s1 = (ProviderService) arg1;
	return s0.getType().compareTo(s1.getType());
	}
	});

	return serviceArray;
	}

	class ProviderContentProvider implements ITreeContentProvider {

	public Object[] getElements(Object inputElement) {
	Object[] returnValue = null;
	if (inputElement instanceof ProviderService[]) {
	returnValue = (Object[]) inputElement;
	}
	return returnValue;
	}

	public Object getParent(Object element) {
	Object returnValue = null;
	if (element instanceof ProviderServiceDetail) {
	returnValue = ((ProviderServiceDetail) element).getParent();
	}
	return returnValue;
	}

	public Object[] getChildren(Object parentElement) {
	Object[] returnValue = null;
	if (parentElement instanceof ProviderService) {
	ProviderService service = (ProviderService) parentElement;
	ArrayList detailList = new ArrayList();
	detailList.add(new ProviderServiceDetail(service, TYPE_CLASSNAME, service.getClassName()));
	if (service.getAliases() != null) {
	detailList.add(new ProviderServiceDetail(service, TYPE_ALIASES, service.getAliases()));
	}
	if (service.getAttributes() != null) {
	detailList.add(new ProviderServiceDetail(service, TYPE_ATTRIBUTES, service.getAttributes()));
	}
	returnValue = detailList.toArray(new ProviderServiceDetail[] {});
	} else if (parentElement instanceof ProviderServiceDetail) {
	returnValue = ((ProviderServiceDetail) parentElement).getChildren();
	}
	return returnValue;
	}

	public boolean hasChildren(Object element) {
	boolean returnValue = false;
	if (element instanceof ProviderService) {
	returnValue = true;
	} else if (element instanceof ProviderServiceDetail) {
	returnValue = ((ProviderServiceDetail) element).hasChildren();
	}
	return returnValue;
	}

	public void dispose() {
	//nothing to do
	}

	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
	//empty
	}
	}

	class ProviderLabelProvider implements ILabelProvider {

	public Image getImage(Object element) {
	return null;
	}

	public String getText(Object element) {
	String returnValue = null;
	if (element instanceof String) {
	returnValue = (String) element;
	} else if (element instanceof ProviderService) {
	ProviderService service = (ProviderService) element;
	returnValue = service.getType() + ": " + service.getAlgorithm(); //$NON-NLS-1$
	} else if (element instanceof ProviderServiceDetail) {
	ProviderServiceDetail detail = (ProviderServiceDetail) element;
	returnValue = detail.toString();
	} else if (element instanceof ProviderServiceAttribute) {
	ProviderServiceAttribute attribute = (ProviderServiceAttribute) element;
	returnValue = attribute.toString();
	}
	return returnValue;
	}

	public boolean isLabelProperty(Object element, String property) {
	return false;
	}

	public void addListener(ILabelProviderListener listener) {
	//empty
	}

	public void removeListener(ILabelProviderListener listener) {
	//empty
	}

	public void dispose() {
	//empty
	}
	}

	private class ProviderService {
	private final String type;
	private final String algorithm;
	private final String className;
	private final List aliases;
	private final Map attributes;

	public ProviderService(String type, String algorithm, String className, List aliases, Map attributes, Bundle providingBundle) {
	this.type = type;
	this.algorithm = algorithm;
	this.className = className;
	this.aliases = aliases;
	this.attributes = attributes;
	}

	public String getType() {
	return type;
	}

	public String getAlgorithm() {
	return algorithm;
	}

	public String getClassName() {
	return className;
	}

	public List getAliases() {
	return aliases;
	}

	public Map getAttributes() {
	return attributes;
	}
	}

	// private static final int TYPE_ALGORITHM = 0;
	// private static final int TYPE_TYPE = 1;
	// private static final int TYPE_BUNDLEID = 2;
	private static final int TYPE_CLASSNAME = 3;
	private static final int TYPE_ALIASES = 4;
	private static final int TYPE_ATTRIBUTES = 5;

	private class ProviderServiceDetail {

	ProviderService parent;
	int type;
	Object data;

	ProviderServiceDetail(ProviderService parent, int type, Object data) {
	this.parent = parent;
	this.type = type;
	this.data = data;
	}

	int getType() {
	return type;
	}

	Object getData() {
	return data;
	}

	ProviderService getParent() {
	return parent;
	}

	public String toString() {
	String returnValue = null;
	switch (getType()) {
	case TYPE_CLASSNAME :
	returnValue = SecurityUIMsg.ADVPAGE_LABEL_CLASS + (String) getData();
	break;

	case TYPE_ALIASES :
	StringBuffer buffer = new StringBuffer();
	buffer.append(SecurityUIMsg.ADVPAGE_LABEL_ALIASES);
	String[] aliases = (String[]) ((List) getData()).toArray(new String[] {});
	for (int i = 0; i < aliases.length; i++) {
	buffer.append(aliases[i]);
	if (i < aliases.length - 1) {
	buffer.append(", "); //$NON-NLS-1$
	}
	}
	returnValue = buffer.toString();
	break;

	case TYPE_ATTRIBUTES :
	returnValue = SecurityUIMsg.ADVPAGE_LABEL_ATTRIBUTES;
	break;
	}
	return returnValue;
	}

	boolean hasChildren() {
	boolean returnValue = false;
	if (getType() == TYPE_ATTRIBUTES) {
	returnValue = true;
	}
	return returnValue;
	}

	Object[] getChildren() {
	Object[] returnValue = null;
	if (getType() == TYPE_ATTRIBUTES) {
	Map attributeMap = (Map) getData();
	ArrayList attributeList = new ArrayList();
	for (Iterator it = attributeMap.keySet().iterator(); it.hasNext();) {
	String key = (String) it.next();
	String value = (String) attributeMap.get(key);
	attributeList.add(new ProviderServiceAttribute(key, value));
	}
	returnValue = attributeList.toArray(new ProviderServiceAttribute[] {});
	}
	return returnValue;
	}
	}

	private class ProviderServiceAttribute {

	String key;
	String value;

	public ProviderServiceAttribute(String key, String value) {
	this.key = key;
	this.value = value;
	}

	public String toString() {
	return key + ": " + value; //$NON-NLS-1$
	}
	}
	}