Expose Late function bindings target for Android.

Includes miscellaneous fixes to make CEL-Java runnable on Android.

PiperOrigin-RevId: 758895258

Author: l46kok

bundle/src/test/java/dev/cel/bundle/BUILD.bazel

@@ -47,6 +47,7 @@ java_library(
         "//runtime:evaluation_exception_builder",
         "//runtime:evaluation_listener",
         "//runtime:function_binding",
+        "//runtime:late_function_binding",
         "//runtime:unknown_attributes",
         "@cel_spec//proto/cel/expr:checked_java_proto",
         "@cel_spec//proto/cel/expr:syntax_java_proto",

java_lite_proto_cel_library.bzl

@@ -47,6 +47,7 @@ def java_lite_proto_cel_library(
     java_lite_proto_cel_library_impl(
         name = name,
         deps = deps,
+        # used_by_android
         java_descriptor_class_suffix = java_descriptor_class_suffix,
         java_proto_library_dep = java_proto_library_dep,
         debug = debug,

java_lite_proto_cel_library_impl.bzl

@@ -26,6 +26,7 @@ def java_lite_proto_cel_library_impl(
         name,
         deps,
         java_proto_library_dep,
+        constraints = [],
         java_descriptor_class_suffix = None,
         debug = False):
     """Generates a CelLiteDescriptor
@@ -35,6 +36,7 @@ def java_lite_proto_cel_library_impl(
        deps: The list of proto_library rules to generate Java code for.
        java_descriptor_class_suffix (optional): Suffix for the Java class name of the generated CEL lite descriptor.
                                                 Default is "CelLiteDescriptor".
+       constraints: (optional) List of strings that denote which environment the produced java_library label is associated in.
        java_proto_library_dep: (optional) Uses the provided java_lite_proto_library or java_proto_library to generate the lite descriptors.
                                 If none is provided, java_lite_proto_library is used by default behind the scenes. Most use cases should not need to provide this.
        debug: (optional) If true, prints additional information during codegen for debugging purposes.
@@ -69,6 +71,7 @@ def java_lite_proto_cel_library_impl(
         name = name,
         srcs = [":" + generated],
         deps = descriptor_codegen_deps,
+        javacopts = ["-Xep:PackageLocation:OFF"],  # TODO: Add generated annotation
     )
 
 def _generate_cel_lite_descriptor_class(ctx):

policy/src/test/java/dev/cel/policy/BUILD.bazel

@@ -33,6 +33,7 @@ java_library(
         "//policy:validation_exception",
         "//runtime",
         "//runtime:function_binding",
+        "//runtime:late_function_binding",
         "@cel_spec//proto/cel/expr/conformance/proto3:test_all_types_java_proto",
         "@maven//:com_google_guava_guava",
         "@maven//:com_google_testparameterinjector_test_parameter_injector",

protobuf/BUILD.bazel

@@ -8,6 +8,7 @@ package(
 java_library(
     name = "cel_lite_descriptor",
     # used_by_android
+    visibility = ["//:android_allow_list"],
     exports = ["//protobuf/src/main/java/dev/cel/protobuf:cel_lite_descriptor"],
 )
 

runtime/BUILD.bazel

@@ -10,6 +10,7 @@ java_library(
     name = "runtime",
     exports = [
         ":evaluation_exception",
+        ":late_function_binding",
         "//runtime/src/main/java/dev/cel/runtime",
         "//runtime/src/main/java/dev/cel/runtime:descriptor_message_provider",
         "//runtime/src/main/java/dev/cel/runtime:function_overload",
@@ -59,6 +60,16 @@ cel_android_library(
     exports = ["//runtime/src/main/java/dev/cel/runtime:function_binding_android"],
 )
 
+java_library(
+    name = "late_function_binding",
+    exports = ["//runtime/src/main/java/dev/cel/runtime:late_function_binding"],
+)
+
+cel_android_library(
+    name = "late_function_binding_android",
+    exports = ["//runtime/src/main/java/dev/cel/runtime:late_function_binding_android"],
+)
+
 java_library(
     name = "function_overload_impl",
     # used_by_android
@@ -85,6 +96,7 @@ java_library(
 
 java_library(
     name = "evaluation_exception",
+    # used_by_android
     exports = ["//runtime/src/main/java/dev/cel/runtime:evaluation_exception"],
 )
 

runtime/src/main/java/dev/cel/runtime/BUILD.bazel

@@ -451,8 +451,6 @@ java_library(
 
 # keep sorted
 RUNTIME_SOURCES = [
-    "CelLateFunctionBindings.java",
-    "CelResolvedOverload.java",
     "CelRuntime.java",
     "CelRuntimeBuilder.java",
     "CelRuntimeFactory.java",
@@ -463,6 +461,47 @@ RUNTIME_SOURCES = [
     "UnknownContext.java",
 ]
 
+LATE_FUNCTION_BINDING_SOURCES = [
+    "CelLateFunctionBindings.java",
+    "CelResolvedOverload.java",
+]
+
+java_library(
+    name = "late_function_binding",
+    srcs = LATE_FUNCTION_BINDING_SOURCES,
+    tags = [
+    ],
+    deps = [
+        ":dispatcher",
+        ":evaluation_exception",
+        ":function_binding",
+        ":function_overload",
+        ":function_overload_impl",
+        ":function_resolver",
+        "//:auto_value",
+        "@maven//:com_google_errorprone_error_prone_annotations",
+        "@maven//:com_google_guava_guava",
+    ],
+)
+
+cel_android_library(
+    name = "late_function_binding_android",
+    srcs = LATE_FUNCTION_BINDING_SOURCES,
+    tags = [
+    ],
+    deps = [
+        ":dispatcher_android",
+        ":evaluation_exception",
+        ":function_binding_android",
+        ":function_overload",
+        ":function_overload_impl",
+        ":function_resolver",
+        "//:auto_value",
+        "@maven//:com_google_errorprone_error_prone_annotations",
+        "@maven_android//:com_google_guava_guava",
+    ],
+)
+
 java_library(
     name = "lite_runtime_library",
     srcs = ["CelLiteRuntimeLibrary.java"],
@@ -677,8 +716,6 @@ java_library(
         ":evaluation_exception",
         ":evaluation_listener",
         ":function_binding",
-        ":function_overload",
-        ":function_overload_impl",
         ":function_resolver",
         ":interpretable",
         ":interpreter",

runtime/src/test/java/dev/cel/runtime/BUILD.bazel

@@ -231,6 +231,7 @@ java_library(
         "//runtime:interpretable",
         "//runtime:interpreter",
         "//runtime:interpreter_util",
+        "//runtime:late_function_binding",
         "//runtime:lite_runtime",
         "//runtime:lite_runtime_factory",
         "//runtime:proto_message_activation_factory",
@@ -307,6 +308,7 @@ cel_android_local_test(
         "//extensions:sets_function",
         "//runtime:evaluation_exception",
         "//runtime:function_binding_android",
+        "//runtime:late_function_binding_android",
         "//runtime:lite_runtime_android",
         "//runtime:lite_runtime_factory_android",
         "//runtime:lite_runtime_impl_android",

runtime/src/test/java/dev/cel/runtime/CelLiteRuntimeAndroidTest.java

@@ -274,6 +274,29 @@ public void eval_customFunctions() throws Exception {
     assertThat(result).isTrue();
   }
 
+  @Test
+  @SuppressWarnings("rawtypes")
+  public void eval_customFunctions_asLateBoundFunctions() throws Exception {
+    CelLiteRuntime runtime =
+        CelLiteRuntimeFactory.newLiteRuntimeBuilder()
+            .addFunctionBindings(CelFunctionBinding.from("list_isEmpty", List.class, List::isEmpty))
+            .setStandardFunctions(CelStandardFunctions.newBuilder().build())
+            .build();
+    // Expr: ''.isEmpty() && [].isEmpty()
+    CelAbstractSyntaxTree ast = readCheckedExpr("compiled_custom_functions");
+    Program program = runtime.createProgram(ast);
+
+    boolean result =
+        (boolean)
+            program.eval(
+                ImmutableMap.of(),
+                CelLateFunctionBindings.from(
+                    CelFunctionBinding.from("string_isEmpty", String.class, String::isEmpty),
+                    CelFunctionBinding.from("list_isEmpty", List.class, List::isEmpty)));
+
+    assertThat(result).isTrue();
+  }
+
   @Test
   @TestParameters("{checkedExpr: 'compiled_proto2_select_primitives'}")
   @TestParameters("{checkedExpr: 'compiled_proto3_select_primitives'}")

testing/src/main/java/dev/cel/testing/BUILD.bazel

@@ -109,6 +109,7 @@ java_library(
         "//extensions:optional_library",
         "//runtime",
         "//runtime:function_binding",
+        "//runtime:late_function_binding",
         "//runtime:unknown_attributes",
         "@cel_spec//proto/cel/expr:checked_java_proto",
         "@cel_spec//proto/cel/expr/conformance/proto3:test_all_types_java_proto",