[BUG] Expression compilation failure for expressions involving fields which are imported from proto files in different module

[iambharaths]

Description

The project i am working is a multi module one, there are fields in a proto for which i am trying to validations that has fields imported from the common module.

The project structure is as given below

└── common
    └── src
        └── main
            └── java
                └── com
                    └── iambharaths
                        └── common
                            └── pax.proto
└── offer
    └── src
        └── main
            └── java
                └── com
                    └── iambharaths
                        └── offer
                            └── shopping_rq.proto

The structure of the shopping_rq.proto file is as given below for which the above error is being thrown.

syntax = "proto3";
package iambharaths.offer;

import "google/api/field_behavior.proto";

import "iambharaths/common/pax.proto";

option java_package = "iambharaths.offer";
option java_outer_classname = "ShoppingRqProto";
option java_multiple_files = true;

message ShoppingRQ {
  string origin_station_code = 1 [(google.api.field_behavior) = REQUIRED,
    (buf.validate.field).required = true];
  string dest_station_code = 2 [(google.api.field_behavior) = REQUIRED,
    (buf.validate.field).required = true];
  string onward_dep_date = 3 [(google.api.field_behavior) = REQUIRED,
    (buf.validate.field).required = true];
  string return_dep_date = 4 [(google.api.field_behavior) = REQUIRED,
    (buf.validate.field).required = true];
  map<string, iambharaths.common.Pax> passengers = 5 [(buf.validate.field).map.max_pairs = 9, (buf.validate.field).map.min_pairs = 1];
  option (buf.validate.message).cel = {
    id: "at_least_one_adt_pax",
    message: "there must be at least one adult",
    expression: "this.passengers.exists(paxId, this.passengers[paxId].ptc == 1)"
  };
}

When trying to validate the ShoppingRQ message using the validator.validate() method i keep getting this error

build.buf.protovalidate.exceptions.CompilationException: Failed to compile expression at_least_one_adt_pax: ERROR: :1:53: [internal] unexpected failed resolution of 'iambharaths.common.Pax'

Expected Behavior

The validation should be successful without any CompilationException being thrown.

Actual Behavior

The message validation fails with build.buf.protovalidate.exceptions.CompilationException being thrown.

Screenshots/Logs

build.buf.protovalidate.exceptions.CompilationException: Failed to compile expression at_least_one_adt_pax:
ERROR: <input>:1:53: [internal] unexpected failed resolution of 'iambharaths.common.Pax'
 | this.passengers.exists(paxId, this.passengers[paxId].ptc == 1)
 | ....................................................^
	at build.buf.protovalidate.internal.expression.AstExpression.newAstExpression(AstExpression.java:49)
	at build.buf.protovalidate.internal.evaluator.EvaluatorBuilder$DescriptorCacheBuilder.compileConstraints(EvaluatorBuilder.java:525)
	at build.buf.protovalidate.internal.evaluator.EvaluatorBuilder$DescriptorCacheBuilder.processMessageExpressions(EvaluatorBuilder.java:200)
	at build.buf.protovalidate.internal.evaluator.EvaluatorBuilder$DescriptorCacheBuilder.buildMessage(EvaluatorBuilder.java:176)
	at build.buf.protovalidate.internal.evaluator.EvaluatorBuilder$DescriptorCacheBuilder.createMessageEvaluator(EvaluatorBuilder.java:159)
	at build.buf.protovalidate.internal.evaluator.EvaluatorBuilder$DescriptorCacheBuilder.build(EvaluatorBuilder.java:148)
	at build.buf.protovalidate.internal.evaluator.EvaluatorBuilder.build(EvaluatorBuilder.java:112)
	at build.buf.protovalidate.internal.evaluator.EvaluatorBuilder.load(EvaluatorBuilder.java:91)
	at build.buf.protovalidate.Validator.validate(Validator.java:76)
	at com.github.iambharaths.offermanagement.validation.RequestValidator.validateRequest(RequestValidator.java:21)
	at com.github.iambharaths.offermanagement.api.OfferManagementV4Api.shop(OfferManagementV4Api.java:55)
	at com.github.iambharaths.offermanagement.api.OfferManagementV4Api$$FastClassBySpringCGLIB$$3a57c4dd.invoke(<generated>)
	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:783)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:753)
	at org.springframework.aop.aspectj.AspectJAfterAdvice.invoke(AspectJAfterAdvice.java:49)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:175)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:753)
	at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:58)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:175)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:753)
	at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:753)
	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:698)
	at com.github.iambharaths.offermanagement.api.OfferManagementV4Api$$EnhancerBySpringCGLIB$$58b63b3a.shop(<generated>)
	at com.github.iambharaths.offer.OfferManagementServiceGrpc$MethodHandlers.invoke(OfferManagementServiceGrpc.java:1044)
	at io.grpc.stub.ServerCalls$UnaryServerCallHandler$UnaryServerCallListener.onHalfClose(ServerCalls.java:182)
	at io.grpc.PartialForwardingServerCallListener.onHalfClose(PartialForwardingServerCallListener.java:35)
	at io.grpc.ForwardingServerCallListener.onHalfClose(ForwardingServerCallListener.java:23)
	at io.grpc.ForwardingServerCallListener$SimpleForwardingServerCallListener.onHalfClose(ForwardingServerCallListener.java:40)
	at io.grpc.Contexts$ContextualizedServerCallListener.onHalfClose(Contexts.java:86)
	at io.grpc.internal.ServerCallImpl$ServerStreamListenerImpl.halfClosed(ServerCallImpl.java:351)
	at io.grpc.internal.ServerImpl$JumpToApplicationThreadServerStreamListener$1HalfClosed.runInContext(ServerImpl.java:861)
	at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)
	at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:133)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base/java.lang.Thread.run(Thread.java:833)

Environment

• Operating System: macOS
• Version: macOS 14.4
• Protobuf Compiler & Version: protoc 3.24.4
• Protovalidate Version: v0.2.0