4.09 Write the urimatcher

Author: Lyla

app/src/androidTest/java/com/example/android/sunshine/app/data/TestUriMatcher.java

@@ -15,6 +15,7 @@
  */
 package com.example.android.sunshine.app.data;
 
+import android.content.UriMatcher;
 import android.net.Uri;
 import android.test.AndroidTestCase;
 
@@ -41,16 +42,16 @@ public class TestUriMatcher extends AndroidTestCase {
         for each of the Uri types that our ContentProvider can handle.  Uncomment this when you are
         ready to test your UriMatcher.
      */
-//    public void testUriMatcher() {
-//        UriMatcher testMatcher = WeatherProvider.buildUriMatcher();
-//
-//        assertEquals("Error: The WEATHER URI was matched incorrectly.",
-//                testMatcher.match(TEST_WEATHER_DIR), WeatherProvider.WEATHER);
-//        assertEquals("Error: The WEATHER WITH LOCATION URI was matched incorrectly.",
-//                testMatcher.match(TEST_WEATHER_WITH_LOCATION_DIR), WeatherProvider.WEATHER_WITH_LOCATION);
-//        assertEquals("Error: The WEATHER WITH LOCATION AND DATE URI was matched incorrectly.",
-//                testMatcher.match(TEST_WEATHER_WITH_LOCATION_AND_DATE_DIR), WeatherProvider.WEATHER_WITH_LOCATION_AND_DATE);
-//        assertEquals("Error: The LOCATION URI was matched incorrectly.",
-//                testMatcher.match(TEST_LOCATION_DIR), WeatherProvider.LOCATION);
-//    }
+    public void testUriMatcher() {
+        UriMatcher testMatcher = WeatherProvider.buildUriMatcher();
+
+        assertEquals("Error: The WEATHER URI was matched incorrectly.",
+                testMatcher.match(TEST_WEATHER_DIR), WeatherProvider.WEATHER);
+        assertEquals("Error: The WEATHER WITH LOCATION URI was matched incorrectly.",
+                testMatcher.match(TEST_WEATHER_WITH_LOCATION_DIR), WeatherProvider.WEATHER_WITH_LOCATION);
+        assertEquals("Error: The WEATHER WITH LOCATION AND DATE URI was matched incorrectly.",
+                testMatcher.match(TEST_WEATHER_WITH_LOCATION_AND_DATE_DIR), WeatherProvider.WEATHER_WITH_LOCATION_AND_DATE);
+        assertEquals("Error: The LOCATION URI was matched incorrectly.",
+                testMatcher.match(TEST_LOCATION_DIR), WeatherProvider.LOCATION);
+    }
 }

app/src/main/java/com/example/android/sunshine/app/data/WeatherProvider.java

@@ -115,16 +115,22 @@ private Cursor getWeatherByLocationSettingAndDate(
         testUriMatcher test within TestUriMatcher.
      */
     static UriMatcher buildUriMatcher() {
-        // 1) The code passed into the constructor represents the code to return for the root
-        // URI.  It's common to use NO_MATCH as the code for this case. Add the constructor below.
-
-
-        // 2) Use the addURI function to match each of the types.  Use the constants from
-        // WeatherContract to help define the types to the UriMatcher.
-
-
-        // 3) Return the new matcher!
-        return null;
+        // I know what you're thinking.  Why create a UriMatcher when you can use regular
+        // expressions instead?  Because you're not crazy, that's why.
+
+        // All paths added to the UriMatcher have a corresponding code to return when a match is
+        // found.  The code passed into the constructor represents the code to return for the root
+        // URI.  It's common to use NO_MATCH as the code for this case.
+        final UriMatcher matcher = new UriMatcher(UriMatcher.NO_MATCH);
+        final String authority = WeatherContract.CONTENT_AUTHORITY;
+
+        // For each type of URI you want to add, create a corresponding code.
+        matcher.addURI(authority, WeatherContract.PATH_WEATHER, WEATHER);
+        matcher.addURI(authority, WeatherContract.PATH_WEATHER + "/*", WEATHER_WITH_LOCATION);
+        matcher.addURI(authority, WeatherContract.PATH_WEATHER + "/*/#", WEATHER_WITH_LOCATION_AND_DATE);
+
+        matcher.addURI(authority, WeatherContract.PATH_LOCATION, LOCATION);
+        return matcher;
     }
 
     /*