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      1 /*
      2  * Copyright (C) 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.server.wifi;
     18 
     19 import com.android.server.wifi.util.XmlUtil;
     20 
     21 import org.xmlpull.v1.XmlPullParser;
     22 import org.xmlpull.v1.XmlPullParserException;
     23 import org.xmlpull.v1.XmlSerializer;
     24 
     25 import java.io.IOException;
     26 import java.util.HashSet;
     27 import java.util.Set;
     28 
     29 /**
     30  * This class performs serialization and parsing of XML data block that contain the list of
     31  * deleted ephemeral SSIDs (XML block data inside <DeletedEphemeralSSIDList> tag).
     32  */
     33 public class DeletedEphemeralSsidsStoreData implements WifiConfigStore.StoreData {
     34     private static final String XML_TAG_SECTION_HEADER_DELETED_EPHEMERAL_SSID_LIST =
     35             "DeletedEphemeralSSIDList";
     36     private static final String XML_TAG_SSID_LIST = "SSIDList";
     37 
     38     private Set<String> mSsidList;
     39 
     40     DeletedEphemeralSsidsStoreData() {}
     41 
     42     @Override
     43     public void serializeData(XmlSerializer out, boolean shared)
     44             throws XmlPullParserException, IOException {
     45         if (shared) {
     46             throw new XmlPullParserException("Share data not supported");
     47         }
     48         if (mSsidList != null) {
     49             XmlUtil.writeNextValue(out, XML_TAG_SSID_LIST, mSsidList);
     50         }
     51     }
     52 
     53     @Override
     54     public void deserializeData(XmlPullParser in, int outerTagDepth, boolean shared)
     55             throws XmlPullParserException, IOException {
     56         if (shared) {
     57             throw new XmlPullParserException("Share data not supported");
     58         }
     59 
     60         while (!XmlUtil.isNextSectionEnd(in, outerTagDepth)) {
     61             String[] valueName = new String[1];
     62             Object value = XmlUtil.readCurrentValue(in, valueName);
     63             if (valueName[0] == null) {
     64                 throw new XmlPullParserException("Missing value name");
     65             }
     66             switch (valueName[0]) {
     67                 case XML_TAG_SSID_LIST:
     68                     mSsidList = (Set<String>) value;
     69                     break;
     70                 default:
     71                     throw new XmlPullParserException("Unknown tag under "
     72                             + XML_TAG_SECTION_HEADER_DELETED_EPHEMERAL_SSID_LIST
     73                             + ": " + valueName[0]);
     74             }
     75         }
     76     }
     77 
     78     @Override
     79     public void resetData(boolean shared) {
     80         if (!shared) {
     81             mSsidList = null;
     82         }
     83     }
     84 
     85     @Override
     86     public String getName() {
     87         return XML_TAG_SECTION_HEADER_DELETED_EPHEMERAL_SSID_LIST;
     88     }
     89 
     90     @Override
     91     public boolean supportShareData() {
     92         return false;
     93     }
     94 
     95     /**
     96      * An empty set will be returned for null SSID list.
     97      *
     98      * @return Set of SSIDs
     99      */
    100     public Set<String> getSsidList() {
    101         if (mSsidList == null) {
    102             return new HashSet<String>();
    103         }
    104         return mSsidList;
    105     }
    106 
    107     public void setSsidList(Set<String> ssidList) {
    108         mSsidList = ssidList;
    109     }
    110 }
    111 
    112