Support regular expression for condition pattern

Bug: 8556975
Change-Id: Iffc53d6a40dd77860434c5f7f4f59af5cd1ba92b

java/src/com/android/inputmethod/latin/ResourceUtils.java

@@ -103,12 +103,12 @@ public final class ResourceUtils {
     /**
      * Find the condition that fulfills specified key value pairs from an array of
      * "condition,constant", and return the corresponding string constant. A condition is
-     * "pattern1[:pattern2...] (or an empty string for the default). A pattern is "key=value"
-     * string. The condition matches only if all patterns of the condition are true for the
-     * specified key value pairs.
+     * "pattern1[:pattern2...] (or an empty string for the default). A pattern is
+     * "key=regexp_value" string. The condition matches only if all patterns of the condition
+     * are true for the specified key value pairs.
      *
      * For example, "condition,constant" has the following format.
-     * (See {@link ResourceUtilsTests#testFindConstantForKeyValuePairsCombined()})
+     * (See {@link ResourceUtilsTests#testFindConstantForKeyValuePairsRegexp()})
      *  - HARDWARE=mako,constantForNexus4
      *  - MODEL=Nexus 4:MANUFACTURER=LGE,constantForNexus4
      *  - ,defaultConstant
@@ -156,8 +156,8 @@ public final class ResourceUtils {
             if (value == null) {
                 throw new RuntimeException("Found unknown key: " + condition);
             }
-            final String patternValue = pattern.substring(posEqual + 1);
-            if (!value.equals(patternValue)) {
+            final String patternRegexpValue = pattern.substring(posEqual + 1);
+            if (!value.matches(patternRegexpValue)) {
                 return false;
             }
         }

tests/src/com/android/inputmethod/latin/ResourceUtilsTests.java

@@ -137,4 +137,40 @@ public class ResourceUtilsTests extends AndroidTestCase {
         assertNull(ResourceUtils.findConstantForKeyValuePairs(keyValues, array));
         assertEquals(ResourceUtils.findConstantForKeyValuePairs(keyValues, failArray), "0.2");
     }
+
+    public void testFindConstantForKeyValuePairsRegexp() {
+        final String HARDWARE_KEY = "HARDWARE";
+        final String MODEL_KEY = "MODEL";
+        final String MANUFACTURER_KEY = "MANUFACTURER";
+        final String[] array = {
+            ",defaultValue",
+            "HARDWARE=grouper|tilapia:MANUFACTURER=asus,0.3",
+            "HARDWARE=[mM][aA][kK][oO]:MODEL=Nexus 4,0.4",
+            "HARDWARE=manta.*:MODEL=Nexus 10:MANUFACTURER=samsung,0.2"
+        };
+
+        final HashMap<String,String> keyValues = CollectionUtils.newHashMap();
+        keyValues.put(HARDWARE_KEY, "grouper");
+        keyValues.put(MODEL_KEY, "Nexus 7");
+        keyValues.put(MANUFACTURER_KEY, "asus");
+        assertEquals(ResourceUtils.findConstantForKeyValuePairs(keyValues, array), "0.3");
+        keyValues.put(HARDWARE_KEY, "tilapia");
+        assertEquals(ResourceUtils.findConstantForKeyValuePairs(keyValues, array), "0.3");
+
+        keyValues.clear();
+        keyValues.put(HARDWARE_KEY, "mako");
+        keyValues.put(MODEL_KEY, "Nexus 4");
+        keyValues.put(MANUFACTURER_KEY, "LGE");
+        assertEquals(ResourceUtils.findConstantForKeyValuePairs(keyValues, array), "0.4");
+        keyValues.put(HARDWARE_KEY, "MAKO");
+        assertEquals(ResourceUtils.findConstantForKeyValuePairs(keyValues, array), "0.4");
+
+        keyValues.clear();
+        keyValues.put(HARDWARE_KEY, "manta");
+        keyValues.put(MODEL_KEY, "Nexus 10");
+        keyValues.put(MANUFACTURER_KEY, "samsung");
+        assertEquals(ResourceUtils.findConstantForKeyValuePairs(keyValues, array), "0.2");
+        keyValues.put(HARDWARE_KEY, "mantaray");
+        assertEquals(ResourceUtils.findConstantForKeyValuePairs(keyValues, array), "0.2");
+    }
 }