1 | /** |
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2 | * Licensed to the Apache Software Foundation (ASF) under one |
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3 | * or more contributor license agreements. See the NOTICE file |
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4 | * distributed with this work for additional information |
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5 | * regarding copyright ownership. The ASF licenses this file |
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6 | * to you under the Apache License, Version 2.0 (the |
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7 | * "License"); you may not use this file except in compliance |
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8 | * with the License. You may obtain a copy of the License at |
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9 | * |
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10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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11 | * |
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12 | * Unless required by applicable law or agreed to in writing, software |
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13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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15 | * See the License for the specific language governing permissions and |
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16 | * limitations under the License. |
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17 | */ |
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18 | package org.apache.hadoop.security.authorize; |
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19 | |
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20 | import java.security.Permission; |
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21 | |
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22 | import org.apache.hadoop.ipc.VersionedProtocol; |
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23 | |
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24 | /** |
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25 | * {@link Permission} to initiate a connection to a given service. |
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26 | */ |
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27 | public class ConnectionPermission extends Permission { |
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28 | |
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29 | private static final long serialVersionUID = 1L; |
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30 | private final Class<?> protocol; |
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31 | |
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32 | /** |
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33 | * {@link ConnectionPermission} for a given service. |
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34 | * @param protocol service to be accessed |
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35 | */ |
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36 | public ConnectionPermission(Class<?> protocol) { |
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37 | super(protocol.getName()); |
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38 | this.protocol = protocol; |
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39 | } |
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40 | |
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41 | @Override |
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42 | public boolean equals(Object obj) { |
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43 | if (obj instanceof ConnectionPermission) { |
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44 | return protocol == ((ConnectionPermission)obj).protocol; |
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45 | } |
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46 | return false; |
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47 | } |
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48 | |
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49 | @Override |
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50 | public String getActions() { |
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51 | return "ALLOW"; |
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52 | } |
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53 | |
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54 | @Override |
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55 | public int hashCode() { |
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56 | return protocol.hashCode(); |
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57 | } |
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58 | |
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59 | @Override |
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60 | public boolean implies(Permission permission) { |
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61 | if (permission instanceof ConnectionPermission) { |
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62 | ConnectionPermission that = (ConnectionPermission)permission; |
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63 | if (that.protocol.equals(VersionedProtocol.class)) { |
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64 | return true; |
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65 | } |
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66 | return this.protocol.equals(that.protocol); |
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67 | } |
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68 | return false; |
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69 | } |
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70 | |
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71 | public String toString() { |
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72 | return "ConnectionPermission(" + protocol.getName() + ")"; |
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73 | } |
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74 | } |
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