Add places content provider

code/ContextAnalyser/AndroidManifest.xml

@@ -10,6 +10,9 @@
         </activity>
 
         <service android:name=".ContextAnalyserService" android:label="Context Analyser Service"/>
+
+        <provider android:name="uk.co.md87.android.contextanalyser.PlacesContentProvider"
+            android:authorities="uk.co.md87.android.contextanalyser.placescontentprovider" />
     </application>
 
     <permission android:name="uk.co.md87.android.contextanalyser.RECEIVE_UPDATES"

code/ContextAnalyser/src/uk/co/md87/android/contextanalyser/DataHelper.java

@@ -40,7 +40,7 @@ import java.util.Map;
  */
 public class DataHelper {
 
-    private static final String LOCATIONS_TABLE = "locations";
+    public static final String LOCATIONS_TABLE = "locations";
     private static final String DATABASE_NAME = "contextapi.db";
     private static final int DATABASE_VERSION = 2;
 
@@ -66,6 +66,10 @@ public class DataHelper {
         this.updateLocationStatement = db.compileStatement(UPDATE_LOCATION);
     }
 
+    public SQLiteDatabase getDatabase() {
+        return db;
+    }
+
     public long addLocation(final String name, final double lat, final double lon) {
         Log.i(getClass().getSimpleName(), "Adding new place at " + lat + ", " + lon);
         insertLocationStatement.bindString(1, name);

code/ContextAnalyser/src/uk/co/md87/android/contextanalyser/Place.java

@@ -22,6 +22,8 @@
 
 package uk.co.md87.android.contextanalyser;
 
+import android.net.Uri;
+
 /**
  * A place is a named location which has some significance for the user. Most
  * places come about when the user remains stationary for a period of time.
@@ -35,6 +37,10 @@ public class Place {
     public static final String LATITUDE = "lat";
     public static final String LONGITUDE = "lon";
 
+    public static final Uri CONTENT_URI = Uri.parse("content://"
+                + PlacesContentProvider.AUTHORITY + "/places");
+    public static final String CONTENT_TYPE = "vnd.contextanalyser.location";
+
     private final long id;
     private final String name;
     private final double lat;

code/ContextAnalyser/src/uk/co/md87/android/contextanalyser/PlacesContentProvider.java

@@ -0,0 +1,111 @@
+/*
+ * To change this template, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+package uk.co.md87.android.contextanalyser;
+
+import android.content.ContentProvider;
+import android.content.ContentUris;
+import android.content.ContentValues;
+import android.content.UriMatcher;
+import android.database.Cursor;
+import android.database.SQLException;
+import android.net.Uri;
+
+/**
+ * A content provider for places.
+ * 
+ * @author chris
+ */
+public class PlacesContentProvider extends ContentProvider {
+
+    public static final String AUTHORITY = "uk.co.md87.android.contextanalyser.placescontentprovider";
+
+    private static final int CODE_PLACES = 1;
+    private static final UriMatcher URI_MATCHER;
+
+    static {
+        URI_MATCHER = new UriMatcher(UriMatcher.NO_MATCH);
+        URI_MATCHER.addURI(AUTHORITY, "places", CODE_PLACES);
+    }
+
+    private DataHelper helper;
+
+    /** {@inheritDoc} */
+    @Override
+    public boolean onCreate() {
+        helper = new DataHelper(getContext());
+        return true;
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public Cursor query(final Uri uri, final String[] projection,
+            final String selection, final String[] selectionArgs,
+            final String sortOrder) {
+        if (URI_MATCHER.match(uri) != CODE_PLACES) {
+            throw new IllegalArgumentException("Unknown URI " + uri);
+        }
+
+        return helper.getDatabase().query(DataHelper.LOCATIONS_TABLE,
+                projection, selection, selectionArgs, null, null, sortOrder);
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public String getType(final Uri uri) {
+        if (URI_MATCHER.match(uri) != CODE_PLACES) {
+            throw new IllegalArgumentException("Unknown URI " + uri);
+        }
+
+        return "vnd.android.cursor." + (ContentUris.parseId(uri) == -1 ? "dir" : "item")
+                + Place.CONTENT_TYPE;
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public Uri insert(final Uri uri, final ContentValues values) {
+        if (URI_MATCHER.match(uri) != CODE_PLACES) {
+            throw new IllegalArgumentException("Unknown URI " + uri);
+        }
+
+        long rowId = helper.getDatabase().insert(DataHelper.LOCATIONS_TABLE, Place.NAME, values);
+
+        if (rowId > 0) {
+            final Uri placeUri = ContentUris.withAppendedId(Place.CONTENT_URI, rowId);
+            getContext().getContentResolver().notifyChange(placeUri, null);
+            return placeUri;
+        }
+
+        throw new SQLException("Failed to insert row into " + uri);
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public int delete(Uri uri, String where, String[] whereArgs) {
+        if (URI_MATCHER.match(uri) != CODE_PLACES) {
+            throw new IllegalArgumentException("Unknown URI " + uri);
+        }
+
+        final int count = helper.getDatabase().delete(DataHelper.LOCATIONS_TABLE, where, whereArgs);
+
+        getContext().getContentResolver().notifyChange(uri, null);
+        return count;
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public int update(Uri uri, ContentValues values, String where, String[] whereArgs) {
+        if (URI_MATCHER.match(uri) != CODE_PLACES) {
+            throw new IllegalArgumentException("Unknown URI " + uri);
+        }
+
+        final int count = helper.getDatabase().update(DataHelper.LOCATIONS_TABLE,
+                values, where, whereArgs);
+
+        getContext().getContentResolver().notifyChange(uri, null);
+        return count;
+    }
+
+}