bundles/org.eclipse.osgi/core/framework/org/eclipse/osgi/framework/internal/core/ConditionalPermissionInfoImpl.java - equinox/rt.equinox.framework - Git at Google

 /*******************************************************************************
  * Copyright (c) 2005 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.osgi.framework.internal.core;

 import java.io.File;
 import java.io.Serializable;
 import java.lang.reflect.*;
 import java.security.*;
 import java.util.ArrayList;
 import org.osgi.framework.Bundle;
 import org.osgi.service.condpermadmin.*;
 import org.osgi.service.permissionadmin.PermissionInfo;

 /**
  *
  * This is a runtime embodiment of the data stored in ConditionalPermissionInfo.
  * It has methods to facilitate the management of Conditions and Permissions at
  * runtime.
  */
 public class ConditionalPermissionInfoImpl implements ConditionalPermissionInfo, Serializable {
 	private static final long serialVersionUID = 3258130245704825139L;
 	/**
 	 * The permissions enabled by the associated Conditions.
 	 */
 	PermissionInfo perms[];
 	/**
 	 * The conditions that must be satisfied to enable the corresponding
 	 * permissions.
 	 */
 	ConditionInfo conds[];

 	/**
 	 * The name of the ConditionalPermissionInfo
 	 */
 	private String name;

 	/**
 	 * When true, this object has been deleted and any information retrieved
 	 * from it should be discarded.
 	 */
 	private boolean deleted = false;

 	/**
 	 * When true, this object has been deleted and any information retrieved
 	 * from it should be discarded.
 	 */
 	boolean isDeleted() {
 		return deleted;
 	}

 	public ConditionalPermissionInfoImpl(String encoded) {
 		decode(encoded);
 	}

 	public ConditionalPermissionInfoImpl(String name, ConditionInfo conds[], PermissionInfo perms[]) {
 		this.name = name;
 		this.conds = conds;
 		this.perms = perms;
 	}

 	private void decode(String encoded) {
 		int start = encoded.indexOf('{');
 		int end = encoded.lastIndexOf('}');
 		if (start < 0 || end < start)
 			throw new IllegalArgumentException(encoded);
 		if (start != 0)
 			name = encoded.substring(0, start);
 		char[] chars = encoded.substring(start + 1, end).toCharArray();
 		ArrayList condList = new ArrayList();
 		ArrayList permList = new ArrayList();
 		int pos = 0;
 		while (pos < chars.length) {
 			while (pos < chars.length && chars[pos] != '[' && chars[pos] != '(')
 				pos++;
 			if (pos == chars.length)
 				break; // no perms or conds left
 			int startPos = pos;
 			char endChar = chars[startPos] == '[' ? ']' : ')';
 			while (chars[pos] != endChar) {
 				if (chars[pos] == '"') {
 					pos++;
 					while (chars[pos] != '"') {
 						if (chars[pos] == '\\')
 							pos++;
 						pos++;
 					}
 				}
 				pos++;
 			}
 			int endPos = pos;
 			String token = new String(chars, startPos, endPos - startPos + 1);
 			if (endChar == ']')
 				condList.add(new ConditionInfo(token));
 			else
 				permList.add(new PermissionInfo(token));
 			pos++;
 		}
 		conds = (ConditionInfo[]) condList.toArray(new ConditionInfo[condList.size()]);
 		perms = (PermissionInfo[]) permList.toArray(new PermissionInfo[permList.size()]);
 	}

 	public String getName() {
 		return name;
 	}

 	/**
 	 * @see org.osgi.service.condpermadmin.ConditionalPermissionInfo#getConditionInfos()
 	 */
 	public ConditionInfo[] getConditionInfos() {
 		if (conds == null)
 			return null;
 		ConditionInfo[] results = new ConditionInfo[conds.length];
 		System.arraycopy(conds, 0, results, 0, conds.length);
 		return results;
 	}

 	/* Used to find permission constructors in addPermissions */
 	static private final Class twoStringClassArray[] = new Class[] {String.class, String.class};
 	static private final Class oneStringClassArray[] = new Class[] {String.class};
 	static private final Class noArgClassArray[] = new Class[] {};
 	static private final Class[][] permClassArrayArgs = new Class[][] {noArgClassArray, oneStringClassArray, twoStringClassArray};
 	/* Used to find condition constructors getConditions */
 	static private final Class[] condClassArray = new Class[] {Bundle.class, ConditionInfo.class};

 	/**
 	 * Adds the permissions of the given type (if any) that are part of this
 	 * ConditionalPermissionInfo to the specified collection. The Permission
 	 * instances are constructed using the specified permClass.
 	 *
 	 * @param collection the collection to add to.
 	 * @param permClass the class to use to construct Permission instances.
 	 * @return the number of Permissions added.
 	 * @throws NoSuchMethodException
 	 * @throws SecurityException
 	 * @throws InvocationTargetException
 	 * @throws IllegalAccessException
 	 * @throws InstantiationException
 	 * @throws IllegalArgumentException
 	 */
 	int addPermissions(AbstractBundle bundle, PermissionCollection collection, Class permClass) throws SecurityException, NoSuchMethodException, IllegalArgumentException, InstantiationException, IllegalAccessException, InvocationTargetException {
 		String permClassName = permClass.getName();
 		Constructor constructor = null;
 		int numArgs = -1;
 		for (int i = permClassArrayArgs.length - 1 ; i >= 0; i--) {
 			try {
 				constructor = permClass.getConstructor(permClassArrayArgs[i]);
 				numArgs = i;
 				break;
 			} catch (NoSuchMethodException e) {
 				// ignore
 			}
 		}
 		if (constructor == null)
 			throw new NoSuchMethodException(permClass.getName() + ".<init>()"); //$NON-NLS-1$
 		int count = 0;
 		/*
 		 * TODO: We need to cache the permission constructors to enhance performance (see bug 118813).
 		 */
 		for (int i = 0; i < perms.length; i++) {
 			if (perms[i].getType().equals(permClassName)) {
 				count++;
 				String args[] = new String[numArgs];
 				if (numArgs > 0)
 					args[0] = perms[i].getName();
 				if (numArgs > 1)
 					args[1] = perms[i].getActions();
 				if (perms[i].getType().equals("java.io.FilePermission")) { //$NON-NLS-1$
 					// map FilePermissions for relative names to the bundle's data area
 					if (!args[0].equals("<<ALL FILES>>")) { //$NON-NLS-1$
 						File file = new File(args[0]);
 						if (!file.isAbsolute()) { // relative name
 							if (bundle == null) // default permissions
 								continue; // no relative file permissions
 							File target = bundle.framework.getDataFile(bundle, args[0]);
 							if (target == null) // no bundle data file area
 								continue; // no relative file permissions
 							args[0] = target.getPath();
 						}
 					}
 				}
 				collection.add((Permission) constructor.newInstance(args));
 			}
 		}
 		return count;
 	}

 	/**
 	 * Returns the Condition objects associated with this ConditionalPermissionInfo.
 	 *
 	 * @param bundle the bundle to be used to construct the Conditions.
 	 *
 	 * @return the array of Conditions that must be satisfied before permissions
 	 *         in the ConditionPermissionInfoImpl can be used.
 	 */
 	Condition[] getConditions(Bundle bundle) {
 		Condition conditions[] = new Condition[conds.length];
 		for (int i = 0; i < conds.length; i++) {
 			/*
 			 * TODO: I think we can pre-get the Constructors in our own
 			 * constructor
 			 */
 			Class clazz;
 			try {
 				clazz = Class.forName(conds[i].getType());
 			} catch (ClassNotFoundException e) {
 				/* If the class isn't there, we fail */
 				return null;
 			}
 			Constructor constructor = null;
 			Method method = null;
 			try {
 				method = clazz.getMethod("getCondition", condClassArray); //$NON-NLS-1$
 				if ((method.getModifiers() & Modifier.STATIC) == 0)
 					method = null;
 			} catch (NoSuchMethodException e) {
 				// This is a normal case
 			}
 			if (method == null)
 				try {
 					constructor = clazz.getConstructor(condClassArray);
 				} catch (NoSuchMethodException e) {
 					// TODO should post a FrameworkEvent of type error here
 					conditions[i] = Condition.FALSE;
 					continue;
 				}

 			Object args[] = {bundle, conds[i]};
 			try {
 				if (method != null)
 					conditions[i] = (Condition) method.invoke(null, args);
 				else
 					conditions[i] = (Condition) constructor.newInstance(args);
 			} catch (Throwable t) {
 				// TODO should post a FrameworkEvent of type error here
 				conditions[i] = Condition.FALSE;
 			}
 		}
 		return conditions;
 	}

 	/**
 	 * @see org.osgi.service.condpermadmin.ConditionalPermissionInfo#getPermissionInfos()
 	 */
 	public PermissionInfo[] getPermissionInfos() {
 		if (perms == null)
 			return null;
 		PermissionInfo[] results = new PermissionInfo[perms.length];
 		System.arraycopy(perms, 0, results, 0, perms.length);
 		return results;
 	}

 	/**
 	 *
 	 * @see org.osgi.service.condpermadmin.ConditionalPermissionInfo#delete()
 	 */
 	public void delete() {
 		SecurityManager sm = System.getSecurityManager();
 		if (sm != null)
 			sm.checkPermission(new AllPermission());
 		deleted = true;
 		condAdmin.deleteConditionalPermissionInfo(this);
 	}

 	private static ConditionalPermissionAdminImpl condAdmin;

 	static void setConditionalPermissionAdminImpl(ConditionalPermissionAdminImpl condAdmin) {
 		ConditionalPermissionInfoImpl.condAdmin = condAdmin;
 	}

 	public String toString() {
 		StringBuffer result = new StringBuffer();
 		if (name != null)
 			result.append(name);
 		ConditionInfo[] curConds = getConditionInfos();
 		PermissionInfo[] curPerms = getPermissionInfos();
 		result.append('{').append(' ');
 		if (curConds != null)
 			for (int i = 0; i < curConds.length; i++)
 				result.append(curConds[i].getEncoded()).append(' ');
 		if (curPerms != null)
 			for (int i = 0; i < curPerms.length; i++)
 				result.append(curPerms[i].getEncoded()).append(' ');
 		result.append('}');
 		return result.toString();
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2005 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.osgi.framework.internal.core;

	import java.io.File;
	import java.io.Serializable;
	import java.lang.reflect.*;
	import java.security.*;
	import java.util.ArrayList;
	import org.osgi.framework.Bundle;
	import org.osgi.service.condpermadmin.*;
	import org.osgi.service.permissionadmin.PermissionInfo;

	/**
	*
	* This is a runtime embodiment of the data stored in ConditionalPermissionInfo.
	* It has methods to facilitate the management of Conditions and Permissions at
	* runtime.
	*/
	public class ConditionalPermissionInfoImpl implements ConditionalPermissionInfo, Serializable {
	private static final long serialVersionUID = 3258130245704825139L;
	/**
	* The permissions enabled by the associated Conditions.
	*/
	PermissionInfo perms[];
	/**
	* The conditions that must be satisfied to enable the corresponding
	* permissions.
	*/
	ConditionInfo conds[];

	/**
	* The name of the ConditionalPermissionInfo
	*/
	private String name;

	/**
	* When true, this object has been deleted and any information retrieved
	* from it should be discarded.
	*/
	private boolean deleted = false;

	/**
	* When true, this object has been deleted and any information retrieved
	* from it should be discarded.
	*/
	boolean isDeleted() {
	return deleted;
	}

	public ConditionalPermissionInfoImpl(String encoded) {
	decode(encoded);
	}

	public ConditionalPermissionInfoImpl(String name, ConditionInfo conds[], PermissionInfo perms[]) {
	this.name = name;
	this.conds = conds;
	this.perms = perms;
	}

	private void decode(String encoded) {
	int start = encoded.indexOf('{');
	int end = encoded.lastIndexOf('}');
	if (start < 0 \|\| end < start)
	throw new IllegalArgumentException(encoded);
	if (start != 0)
	name = encoded.substring(0, start);
	char[] chars = encoded.substring(start + 1, end).toCharArray();
	ArrayList condList = new ArrayList();
	ArrayList permList = new ArrayList();
	int pos = 0;
	while (pos < chars.length) {
	while (pos < chars.length && chars[pos] != '[' && chars[pos] != '(')
	pos++;
	if (pos == chars.length)
	break; // no perms or conds left
	int startPos = pos;
	char endChar = chars[startPos] == '[' ? ']' : ')';
	while (chars[pos] != endChar) {
	if (chars[pos] == '"') {
	pos++;
	while (chars[pos] != '"') {
	if (chars[pos] == '\\')
	pos++;
	pos++;
	}
	}
	pos++;
	}
	int endPos = pos;
	String token = new String(chars, startPos, endPos - startPos + 1);
	if (endChar == ']')
	condList.add(new ConditionInfo(token));
	else
	permList.add(new PermissionInfo(token));
	pos++;
	}
	conds = (ConditionInfo[]) condList.toArray(new ConditionInfo[condList.size()]);
	perms = (PermissionInfo[]) permList.toArray(new PermissionInfo[permList.size()]);
	}

	public String getName() {
	return name;
	}

	/**
	* @see org.osgi.service.condpermadmin.ConditionalPermissionInfo#getConditionInfos()
	*/
	public ConditionInfo[] getConditionInfos() {
	if (conds == null)
	return null;
	ConditionInfo[] results = new ConditionInfo[conds.length];
	System.arraycopy(conds, 0, results, 0, conds.length);
	return results;
	}

	/* Used to find permission constructors in addPermissions */
	static private final Class twoStringClassArray[] = new Class[] {String.class, String.class};
	static private final Class oneStringClassArray[] = new Class[] {String.class};
	static private final Class noArgClassArray[] = new Class[] {};
	static private final Class[][] permClassArrayArgs = new Class[][] {noArgClassArray, oneStringClassArray, twoStringClassArray};
	/* Used to find condition constructors getConditions */
	static private final Class[] condClassArray = new Class[] {Bundle.class, ConditionInfo.class};

	/**
	* Adds the permissions of the given type (if any) that are part of this
	* ConditionalPermissionInfo to the specified collection. The Permission
	* instances are constructed using the specified permClass.
	*
	* @param collection the collection to add to.
	* @param permClass the class to use to construct Permission instances.
	* @return the number of Permissions added.
	* @throws NoSuchMethodException
	* @throws SecurityException
	* @throws InvocationTargetException
	* @throws IllegalAccessException
	* @throws InstantiationException
	* @throws IllegalArgumentException
	*/
	int addPermissions(AbstractBundle bundle, PermissionCollection collection, Class permClass) throws SecurityException, NoSuchMethodException, IllegalArgumentException, InstantiationException, IllegalAccessException, InvocationTargetException {
	String permClassName = permClass.getName();
	Constructor constructor = null;
	int numArgs = -1;
	for (int i = permClassArrayArgs.length - 1 ; i >= 0; i--) {
	try {
	constructor = permClass.getConstructor(permClassArrayArgs[i]);
	numArgs = i;
	break;
	} catch (NoSuchMethodException e) {
	// ignore
	}
	}
	if (constructor == null)
	throw new NoSuchMethodException(permClass.getName() + ".<init>()"); //$NON-NLS-1$
	int count = 0;
	/*
	* TODO: We need to cache the permission constructors to enhance performance (see bug 118813).
	*/
	for (int i = 0; i < perms.length; i++) {
	if (perms[i].getType().equals(permClassName)) {
	count++;
	String args[] = new String[numArgs];
	if (numArgs > 0)
	args[0] = perms[i].getName();
	if (numArgs > 1)
	args[1] = perms[i].getActions();
	if (perms[i].getType().equals("java.io.FilePermission")) { //$NON-NLS-1$
	// map FilePermissions for relative names to the bundle's data area
	if (!args[0].equals("<<ALL FILES>>")) { //$NON-NLS-1$
	File file = new File(args[0]);
	if (!file.isAbsolute()) { // relative name
	if (bundle == null) // default permissions
	continue; // no relative file permissions
	File target = bundle.framework.getDataFile(bundle, args[0]);
	if (target == null) // no bundle data file area
	continue; // no relative file permissions
	args[0] = target.getPath();
	}
	}
	}
	collection.add((Permission) constructor.newInstance(args));
	}
	}
	return count;
	}

	/**
	* Returns the Condition objects associated with this ConditionalPermissionInfo.
	*
	* @param bundle the bundle to be used to construct the Conditions.
	*
	* @return the array of Conditions that must be satisfied before permissions
	* in the ConditionPermissionInfoImpl can be used.
	*/
	Condition[] getConditions(Bundle bundle) {
	Condition conditions[] = new Condition[conds.length];
	for (int i = 0; i < conds.length; i++) {
	/*
	* TODO: I think we can pre-get the Constructors in our own
	* constructor
	*/
	Class clazz;
	try {
	clazz = Class.forName(conds[i].getType());
	} catch (ClassNotFoundException e) {
	/* If the class isn't there, we fail */
	return null;
	}
	Constructor constructor = null;
	Method method = null;
	try {
	method = clazz.getMethod("getCondition", condClassArray); //$NON-NLS-1$
	if ((method.getModifiers() & Modifier.STATIC) == 0)
	method = null;
	} catch (NoSuchMethodException e) {
	// This is a normal case
	}
	if (method == null)
	try {
	constructor = clazz.getConstructor(condClassArray);
	} catch (NoSuchMethodException e) {
	// TODO should post a FrameworkEvent of type error here
	conditions[i] = Condition.FALSE;
	continue;
	}

	Object args[] = {bundle, conds[i]};
	try {
	if (method != null)
	conditions[i] = (Condition) method.invoke(null, args);
	else
	conditions[i] = (Condition) constructor.newInstance(args);
	} catch (Throwable t) {
	// TODO should post a FrameworkEvent of type error here
	conditions[i] = Condition.FALSE;
	}
	}
	return conditions;
	}

	/**
	* @see org.osgi.service.condpermadmin.ConditionalPermissionInfo#getPermissionInfos()
	*/
	public PermissionInfo[] getPermissionInfos() {
	if (perms == null)
	return null;
	PermissionInfo[] results = new PermissionInfo[perms.length];
	System.arraycopy(perms, 0, results, 0, perms.length);
	return results;
	}

	/**
	*
	* @see org.osgi.service.condpermadmin.ConditionalPermissionInfo#delete()
	*/
	public void delete() {
	SecurityManager sm = System.getSecurityManager();
	if (sm != null)
	sm.checkPermission(new AllPermission());
	deleted = true;
	condAdmin.deleteConditionalPermissionInfo(this);
	}

	private static ConditionalPermissionAdminImpl condAdmin;

	static void setConditionalPermissionAdminImpl(ConditionalPermissionAdminImpl condAdmin) {
	ConditionalPermissionInfoImpl.condAdmin = condAdmin;
	}

	public String toString() {
	StringBuffer result = new StringBuffer();
	if (name != null)
	result.append(name);
	ConditionInfo[] curConds = getConditionInfos();
	PermissionInfo[] curPerms = getPermissionInfos();
	result.append('{').append(' ');
	if (curConds != null)
	for (int i = 0; i < curConds.length; i++)
	result.append(curConds[i].getEncoded()).append(' ');
	if (curPerms != null)
	for (int i = 0; i < curPerms.length; i++)
	result.append(curPerms[i].getEncoded()).append(' ');
	result.append('}');
	return result.toString();
	}
	}