plainagletpermission.java

aglet的部分源码

package com.ibm.aglets.security;

/*
 * @(#)PlainAgletPermission.java
 * 
 * IBM Confidential-Restricted
 * 
 * OCO Source Materials
 * 
 * 03L7246 (c) Copyright IBM Corp. 1996, 1998
 * 
 * The source code for this program is not published or otherwise
 * divested of its trade secrets, irrespective of what has been
 * deposited with the U.S. Copyright Office.
 */

import java.security.Permission;

import java.io.Serializable;
import java.util.Vector;

public class PlainAgletPermission extends AgletsPermissionBase 
	implements Serializable {
	private static final String ACTION_DISPOSE = "dispose";
	private static final String ACTION_CLONE = "clone";
	private static final String ACTION_DISPATCH = "dispatch";
	private static final String ACTION_RETRACT = "retract";
	private static final String ACTION_DEACTIVATE = "deactivate";
	private static final String ACTION_ACTIVATE = "activate";

	private static final String[] ACTIONS = {
		ACTION_DISPOSE, ACTION_CLONE, ACTION_DISPATCH, ACTION_RETRACT, 
		ACTION_DEACTIVATE, ACTION_ACTIVATE
	};

	private static final int INDEX_DISPOSE = 0;
	private static final int INDEX_CLONE = 1;
	private static final int INDEX_DISPATCH = 2;
	private static final int INDEX_RETRACT = 3;
	private static final int INDEX_DEACTIVATE = 4;
	private static final int INDEX_ACTIVATE = 5;

	private static final int NUMBER_OF_ACTIONS = 6;

	private String _actions = null;
	private boolean[] _actionFlag = new boolean[NUMBER_OF_ACTIONS];

	// should be implemented?
	// ==== public PermissionCollection newPermissionCollection();
	public PlainAgletPermission(String name, String actions) {
		super(name);
		String[] actionList = split(actions.toLowerCase(), SEPARATORS);
		int i = 0;

		for (i = 0; i < actionList.length; i++) {
			if (actionList[i].equals(ACTION_DISPOSE)) {
				_actionFlag[INDEX_DISPOSE] = true;
			} else if (actionList[i].equals(ACTION_CLONE)) {
				_actionFlag[INDEX_CLONE] = true;
			} else if (actionList[i].equals(ACTION_DISPATCH)) {
				_actionFlag[INDEX_DISPATCH] = true;
			} else if (actionList[i].equals(ACTION_RETRACT)) {
				_actionFlag[INDEX_RETRACT] = true;
			} else if (actionList[i].equals(ACTION_DEACTIVATE)) {
				_actionFlag[INDEX_DEACTIVATE] = true;
			} else if (actionList[i].equals(ACTION_ACTIVATE)) {
				_actionFlag[INDEX_ACTIVATE] = true;
			} 
		} 
		_actions = select(ACTIONS, _actionFlag);
	}
	public boolean equals(Object obj) {
		if (obj == this) {
			return true;
		} 
		if (!(obj instanceof PlainAgletPermission)) {
			return false;
		} 
		PlainAgletPermission o = (PlainAgletPermission)obj;

		return (getName().equals(o.getName()) && _actions.equals(o._actions));
	}
	public String getActions() {
		return _actions;
	}
	public int hashCode() {
		return getName().hashCode() + _actions.hashCode();
	}
	public boolean implies(Permission p) {
		if (!(p instanceof PlainAgletPermission)) {
			return false;
		} 
		PlainAgletPermission ap = (PlainAgletPermission)p;

		if (checkAglet(getName(), ap.getName())) {
			return matches(_actionFlag, ap._actionFlag);
		} else {
			return true;
		}
//		return checkAglet(getName(), ap.getName()) 
//			   && matches(_actionFlag, ap._actionFlag);
	}
}