1 files changed, 154 insertions, 0 deletions
diff --git a/java/com/android/voicemailomtp/TelephonyVvmConfigManager.java b/java/com/android/voicemailomtp/TelephonyVvmConfigManager.java
new file mode 100644
index 000000000..ab13d36ad
--- /dev/null
+++ b/java/com/android/voicemailomtp/TelephonyVvmConfigManager.java
@@ -0,0 +1,154 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package com.android.voicemailomtp;
+
+import android.content.res.Resources;
+import android.os.PersistableBundle;
+import android.support.annotation.Nullable;
+import android.support.annotation.VisibleForTesting;
+import android.util.ArrayMap;
+import com.android.voicemailomtp.utils.XmlUtils;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Map;
+import java.util.Map.Entry;
+import org.xmlpull.v1.XmlPullParser;
+import org.xmlpull.v1.XmlPullParserException;
+
+/**
+ * Load and caches telephony vvm config from res/xml/vvm_config.xml
+ */
+public class TelephonyVvmConfigManager {
+
+    private static final String TAG = "TelephonyVvmCfgMgr";
+
+  private static final boolean USE_DEBUG_CONFIG = false;
+
+    private static final String TAG_PERSISTABLEMAP = "pbundle_as_map";
+
+    static final String KEY_MCCMNC = "mccmnc";
+
+    private static Map<String, PersistableBundle> sCachedConfigs;
+
+    private final Map<String, PersistableBundle> mConfigs;
+
+    public TelephonyVvmConfigManager(Resources resources) {
+        if (sCachedConfigs == null) {
+            sCachedConfigs = loadConfigs(resources.getXml(R.xml.vvm_config));
+        }
+        mConfigs = sCachedConfigs;
+    }
+
+    @VisibleForTesting
+    TelephonyVvmConfigManager(XmlPullParser parser) {
+        mConfigs = loadConfigs(parser);
+    }
+
+    @Nullable
+    public PersistableBundle getConfig(String mccMnc) {
+        if (USE_DEBUG_CONFIG) {
+            return mConfigs.get("TEST");
+        }
+        return mConfigs.get(mccMnc);
+    }
+
+    private static Map<String, PersistableBundle> loadConfigs(XmlPullParser parser) {
+        Map<String, PersistableBundle> configs = new ArrayMap<>();
+        try {
+            ArrayList list = readBundleList(parser);
+            for (Object object : list) {
+                if (!(object instanceof PersistableBundle)) {
+                    throw new IllegalArgumentException("PersistableBundle expected, got " + object);
+                }
+                PersistableBundle bundle = (PersistableBundle) object;
+                String[] mccMncs = bundle.getStringArray(KEY_MCCMNC);
+                if (mccMncs == null) {
+                    throw new IllegalArgumentException("MCCMNC is null");
+                }
+                for (String mccMnc : mccMncs) {
+                    configs.put(mccMnc, bundle);
+                }
+            }
+        } catch (IOException | XmlPullParserException e) {
+            throw new RuntimeException(e);
+        }
+        return configs;
+    }
+
+    @Nullable
+    public static ArrayList readBundleList(XmlPullParser in) throws IOException,
+            XmlPullParserException {
+        final int outerDepth = in.getDepth();
+        int event;
+        while (((event = in.next()) != XmlPullParser.END_DOCUMENT) &&
+                (event != XmlPullParser.END_TAG || in.getDepth() < outerDepth)) {
+            if (event == XmlPullParser.START_TAG) {
+                final String startTag = in.getName();
+                final String[] tagName = new String[1];
+                in.next();
+                return XmlUtils.readThisListXml(in, startTag, tagName,
+                        new MyReadMapCallback(), false);
+            }
+        }
+        return null;
+    }
+
+    public static PersistableBundle restoreFromXml(XmlPullParser in) throws IOException,
+            XmlPullParserException {
+        final int outerDepth = in.getDepth();
+        final String startTag = in.getName();
+        final String[] tagName = new String[1];
+        int event;
+        while (((event = in.next()) != XmlPullParser.END_DOCUMENT) &&
+                (event != XmlPullParser.END_TAG || in.getDepth() < outerDepth)) {
+            if (event == XmlPullParser.START_TAG) {
+                ArrayMap<String, ?> map =
+                        XmlUtils.readThisArrayMapXml(in, startTag, tagName,
+                                new MyReadMapCallback());
+                PersistableBundle result = new PersistableBundle();
+                for (Entry<String, ?> entry : map.entrySet()) {
+                    Object value = entry.getValue();
+                    if (value instanceof Integer) {
+                        result.putInt(entry.getKey(), (int) value);
+                    } else if (value instanceof Boolean) {
+                        result.putBoolean(entry.getKey(), (boolean) value);
+                    } else if (value instanceof String) {
+                        result.putString(entry.getKey(), (String) value);
+                    } else if (value instanceof String[]) {
+                        result.putStringArray(entry.getKey(), (String[]) value);
+                    } else if (value instanceof PersistableBundle) {
+                        result.putPersistableBundle(entry.getKey(), (PersistableBundle) value);
+                    }
+                }
+                return result;
+            }
+        }
+        return PersistableBundle.EMPTY;
+    }
+
+    static class MyReadMapCallback implements XmlUtils.ReadMapCallback {
+
+        @Override
+        public Object readThisUnknownObjectXml(XmlPullParser in, String tag)
+                throws XmlPullParserException, IOException {
+            if (TAG_PERSISTABLEMAP.equals(tag)) {
+                return restoreFromXml(in);
+            }
+            throw new XmlPullParserException("Unknown tag=" + tag);
+        }
+    }
+}