aconfig: add ForceReadOnly mode to aconfig java codegen

This commit adds ForceReadOnly mode to java codegen.

Bug: 316357759
Test: atest aconfig.test aconfig.test.java

Change-Id: I10cd60def9ea20f7d56d87d18f680afeac61dc9d

4 files changed, 258 insertions, 0 deletions

diff --git a/tools/aconfig/Android.bp b/tools/aconfig/Android.bp
index 37be2dd975..b9289d6773 100644
--- a/tools/aconfig/Android.bp
+++ b/tools/aconfig/Android.bp
@@ -96,6 +96,12 @@ aconfig_declarations {
     srcs: ["tests/test_exported.aconfig"],
 }
 
+aconfig_declarations {
+    name: "aconfig.test.forcereadonly.flags",
+    package: "com.android.aconfig.test.forcereadonly",
+    srcs: ["tests/test_force_read_only.aconfig"],
+}
+
 aconfig_values {
     name: "aconfig.test.flag.values",
     package: "com.android.aconfig.test",
@@ -125,6 +131,12 @@ java_aconfig_library {
     mode: "exported",
 }
 
+java_aconfig_library {
+    name: "aconfig_test_java_library_forcereadonly",
+    aconfig_declarations: "aconfig.test.forcereadonly.flags",
+    mode: "force-read-only",
+}
+
 android_test {
     name: "aconfig.test.java",
     srcs: [
@@ -135,6 +147,7 @@ android_test {
     static_libs: [
         "aconfig_test_java_library",
         "aconfig_test_java_library_exported",
+        "aconfig_test_java_library_forcereadonly",
         "androidx.test.rules",
         "testng",
     ],
diff --git a/tools/aconfig/src/codegen/java.rs b/tools/aconfig/src/codegen/java.rs
index a02a7e2d90..f214fa53cc 100644
--- a/tools/aconfig/src/codegen/java.rs
+++ b/tools/aconfig/src/codegen/java.rs
@@ -834,6 +834,228 @@ mod tests {
     }
 
     #[test]
+    fn test_generate_java_code_force_read_only() {
+        let parsed_flags = crate::test::parse_test_flags();
+        let mode = CodegenMode::ForceReadOnly;
+        let modified_parsed_flags =
+            crate::commands::modify_parsed_flags_based_on_mode(parsed_flags, mode).unwrap();
+        let generated_files =
+            generate_java_code(crate::test::TEST_PACKAGE, modified_parsed_flags.into_iter(), mode)
+                .unwrap();
+        let expect_featureflags_content = r#"
+        package com.android.aconfig.test;
+        // TODO(b/303773055): Remove the annotation after access issue is resolved.
+        import android.compat.annotation.UnsupportedAppUsage;
+        /** @hide */
+        public interface FeatureFlags {
+            @com.android.aconfig.annotations.AssumeFalseForR8
+            @UnsupportedAppUsage
+            boolean disabledRo();
+            @com.android.aconfig.annotations.AssumeFalseForR8
+            @UnsupportedAppUsage
+            boolean disabledRw();
+            @com.android.aconfig.annotations.AssumeFalseForR8
+            @UnsupportedAppUsage
+            boolean disabledRwInOtherNamespace();
+            @com.android.aconfig.annotations.AssumeTrueForR8
+            @UnsupportedAppUsage
+            boolean enabledFixedRo();
+            @com.android.aconfig.annotations.AssumeTrueForR8
+            @UnsupportedAppUsage
+            boolean enabledRo();
+            @com.android.aconfig.annotations.AssumeTrueForR8
+            @UnsupportedAppUsage
+            boolean enabledRw();
+        }"#;
+
+        let expect_featureflagsimpl_content = r#"
+        package com.android.aconfig.test;
+        // TODO(b/303773055): Remove the annotation after access issue is resolved.
+        import android.compat.annotation.UnsupportedAppUsage;
+        /** @hide */
+        public final class FeatureFlagsImpl implements FeatureFlags {
+            @Override
+            @UnsupportedAppUsage
+            public boolean disabledRo() {
+                return false;
+            }
+            @Override
+            @UnsupportedAppUsage
+            public boolean disabledRw() {
+                return false;
+            }
+            @Override
+            @UnsupportedAppUsage
+            public boolean disabledRwInOtherNamespace() {
+                return false;
+            }
+            @Override
+            @UnsupportedAppUsage
+            public boolean enabledFixedRo() {
+                return true;
+            }
+            @Override
+            @UnsupportedAppUsage
+            public boolean enabledRo() {
+                return true;
+            }
+            @Override
+            @UnsupportedAppUsage
+            public boolean enabledRw() {
+                return true;
+            }
+        }
+        "#;
+
+        let expect_flags_content = r#"
+        package com.android.aconfig.test;
+        // TODO(b/303773055): Remove the annotation after access issue is resolved.
+        import android.compat.annotation.UnsupportedAppUsage;
+        /** @hide */
+        public final class Flags {
+            /** @hide */
+            public static final String FLAG_DISABLED_RO = "com.android.aconfig.test.disabled_ro";
+            /** @hide */
+            public static final String FLAG_DISABLED_RW = "com.android.aconfig.test.disabled_rw";
+            /** @hide */
+            public static final String FLAG_DISABLED_RW_IN_OTHER_NAMESPACE = "com.android.aconfig.test.disabled_rw_in_other_namespace";
+            /** @hide */
+            public static final String FLAG_ENABLED_FIXED_RO = "com.android.aconfig.test.enabled_fixed_ro";
+            /** @hide */
+            public static final String FLAG_ENABLED_RO = "com.android.aconfig.test.enabled_ro";
+            /** @hide */
+            public static final String FLAG_ENABLED_RW = "com.android.aconfig.test.enabled_rw";
+    
+            @com.android.aconfig.annotations.AssumeFalseForR8
+            @UnsupportedAppUsage
+            public static boolean disabledRo() {
+                return FEATURE_FLAGS.disabledRo();
+            }
+            @com.android.aconfig.annotations.AssumeFalseForR8
+            @UnsupportedAppUsage
+            public static boolean disabledRw() {
+                return FEATURE_FLAGS.disabledRw();
+            }
+            @com.android.aconfig.annotations.AssumeFalseForR8
+            @UnsupportedAppUsage
+            public static boolean disabledRwInOtherNamespace() {
+                return FEATURE_FLAGS.disabledRwInOtherNamespace();
+            }
+            @com.android.aconfig.annotations.AssumeTrueForR8
+            @UnsupportedAppUsage
+            public static boolean enabledFixedRo() {
+                return FEATURE_FLAGS.enabledFixedRo();
+            }
+            @com.android.aconfig.annotations.AssumeTrueForR8
+            @UnsupportedAppUsage
+            public static boolean enabledRo() {
+                return FEATURE_FLAGS.enabledRo();
+            }
+            @com.android.aconfig.annotations.AssumeTrueForR8
+            @UnsupportedAppUsage
+            public static boolean enabledRw() {
+                return FEATURE_FLAGS.enabledRw();
+            }
+            private static FeatureFlags FEATURE_FLAGS = new FeatureFlagsImpl();
+        }"#;
+
+        let expect_fakefeatureflags_content = r#"
+        package com.android.aconfig.test;
+        // TODO(b/303773055): Remove the annotation after access issue is resolved.
+        import android.compat.annotation.UnsupportedAppUsage;
+        import java.util.HashMap;
+        import java.util.Map;
+        /** @hide */
+        public class FakeFeatureFlagsImpl implements FeatureFlags {
+            public FakeFeatureFlagsImpl() {
+                resetAll();
+            }
+            @Override
+            @UnsupportedAppUsage
+            public boolean disabledRo() {
+                return getValue(Flags.FLAG_DISABLED_RO);
+            }
+            @Override
+            @UnsupportedAppUsage
+            public boolean disabledRw() {
+                return getValue(Flags.FLAG_DISABLED_RW);
+            }
+            @Override
+            @UnsupportedAppUsage
+            public boolean disabledRwInOtherNamespace() {
+                return getValue(Flags.FLAG_DISABLED_RW_IN_OTHER_NAMESPACE);
+            }
+            @Override
+            @UnsupportedAppUsage
+            public boolean enabledFixedRo() {
+                return getValue(Flags.FLAG_ENABLED_FIXED_RO);
+            }
+            @Override
+            @UnsupportedAppUsage
+            public boolean enabledRo() {
+                return getValue(Flags.FLAG_ENABLED_RO);
+            }
+            @Override
+            @UnsupportedAppUsage
+            public boolean enabledRw() {
+                return getValue(Flags.FLAG_ENABLED_RW);
+            }
+            public void setFlag(String flagName, boolean value) {
+                if (!this.mFlagMap.containsKey(flagName)) {
+                    throw new IllegalArgumentException("no such flag " + flagName);
+                }
+                this.mFlagMap.put(flagName, value);
+            }
+            public void resetAll() {
+                for (Map.Entry entry : mFlagMap.entrySet()) {
+                    entry.setValue(null);
+                }
+            }
+            private boolean getValue(String flagName) {
+                Boolean value = this.mFlagMap.get(flagName);
+                if (value == null) {
+                    throw new IllegalArgumentException(flagName + " is not set");
+                }
+                return value;
+            }
+            private Map<String, Boolean> mFlagMap = new HashMap<>(
+                Map.ofEntries(
+                    Map.entry(Flags.FLAG_DISABLED_RO, false),
+                    Map.entry(Flags.FLAG_DISABLED_RW, false),
+                    Map.entry(Flags.FLAG_DISABLED_RW_IN_OTHER_NAMESPACE, false),
+                    Map.entry(Flags.FLAG_ENABLED_FIXED_RO, false),
+                    Map.entry(Flags.FLAG_ENABLED_RO, false),
+                    Map.entry(Flags.FLAG_ENABLED_RW, false)
+                )
+            );
+        }
+        "#;
+        let mut file_set = HashMap::from([
+            ("com/android/aconfig/test/Flags.java", expect_flags_content),
+            ("com/android/aconfig/test/FeatureFlagsImpl.java", expect_featureflagsimpl_content),
+            ("com/android/aconfig/test/FeatureFlags.java", expect_featureflags_content),
+            ("com/android/aconfig/test/FakeFeatureFlagsImpl.java", expect_fakefeatureflags_content),
+        ]);
+
+        for file in generated_files {
+            let file_path = file.path.to_str().unwrap();
+            assert!(file_set.contains_key(file_path), "Cannot find {}", file_path);
+            assert_eq!(
+                None,
+                crate::test::first_significant_code_diff(
+                    file_set.get(file_path).unwrap(),
+                    &String::from_utf8(file.contents).unwrap()
+                ),
+                "File {} content is not correct",
+                file_path
+            );
+            file_set.remove(file_path);
+        }
+
+        assert!(file_set.is_empty());
+    }
+
+    #[test]
     fn test_format_java_method_name() {
         let expected = "someSnakeName";
         let input = "____some_snake___name____";
diff --git a/tools/aconfig/tests/AconfigTest.java b/tools/aconfig/tests/AconfigTest.java
index b2deca03b1..7e76efba3c 100644
--- a/tools/aconfig/tests/AconfigTest.java
+++ b/tools/aconfig/tests/AconfigTest.java
@@ -10,6 +10,7 @@ import static com.android.aconfig.test.Flags.enabledRo;
 import static com.android.aconfig.test.Flags.enabledRw;
 import static com.android.aconfig.test.exported.Flags.exportedFlag;
 import static com.android.aconfig.test.exported.Flags.FLAG_EXPORTED_FLAG;
+import static com.android.aconfig.test.forcereadonly.Flags.froRw;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertThrows;
@@ -66,4 +67,9 @@ public final class AconfigTest {
         assertEquals("com.android.aconfig.test.exported.exported_flag", FLAG_EXPORTED_FLAG);
         assertFalse(exportedFlag());
     }
+
+    @Test
+    public void testForceReadOnly() {
+        assertFalse(froRw());
+    }
 }
diff --git a/tools/aconfig/tests/test_force_read_only.aconfig b/tools/aconfig/tests/test_force_read_only.aconfig
new file mode 100644
index 0000000000..05ab0e27d3
--- /dev/null
+++ b/tools/aconfig/tests/test_force_read_only.aconfig
@@ -0,0 +1,17 @@
+package: "com.android.aconfig.test.forcereadonly"
+container: "system"
+
+flag {
+    name: "fro_exported"
+    namespace: "aconfig_test"
+    description: "This is an exported flag"
+    is_exported: true
+    bug: "888"
+}
+
+flag {
+    name: "fro_rw"
+    namespace: "aconfig_test"
+    description: "This flag is not exported"
+    bug: "777"
+}