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192 changes: 192 additions & 0 deletions
192
common/src/main/java/dev/cel/common/internal/CelLiteDescriptorPool.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,192 @@ | ||
| // Copyright 2025 Google LLC | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // https://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package dev.cel.common.internal; | ||
|
|
||
| import com.google.common.collect.ImmutableMap; | ||
| import com.google.common.collect.ImmutableSet; | ||
| import com.google.errorprone.annotations.Immutable; | ||
| import com.google.protobuf.MessageLite; | ||
| import dev.cel.common.annotations.Internal; | ||
| import dev.cel.protobuf.CelLiteDescriptor; | ||
| import dev.cel.protobuf.CelLiteDescriptor.FieldDescriptor; | ||
| import dev.cel.protobuf.CelLiteDescriptor.MessageDescriptor; | ||
| import java.util.Optional; | ||
|
|
||
| /** Descriptor pool for {@link CelLiteDescriptor}s. */ | ||
| @Immutable | ||
| @Internal | ||
| public final class CelLiteDescriptorPool { | ||
| private final ImmutableMap<String, MessageDescriptor> protoFqnToMessageInfo; | ||
| private final ImmutableMap<String, MessageDescriptor> protoJavaClassNameToMessageInfo; | ||
|
|
||
| public static CelLiteDescriptorPool newInstance(ImmutableSet<CelLiteDescriptor> descriptors) { | ||
| return new CelLiteDescriptorPool(descriptors); | ||
| } | ||
|
|
||
| public Optional<MessageDescriptor> findDescriptorByTypeName(String protoFqn) { | ||
| return Optional.ofNullable(protoFqnToMessageInfo.get(protoFqn)); | ||
| } | ||
|
|
||
| public Optional<MessageDescriptor> findDescriptor(MessageLite msg) { | ||
| String className = msg.getClass().getName(); | ||
| return Optional.ofNullable(protoJavaClassNameToMessageInfo.get(className)); | ||
| } | ||
|
|
||
| private static MessageDescriptor newMessageInfo(WellKnownProto wellKnownProto) { | ||
| ImmutableMap.Builder<String, FieldDescriptor> fieldInfoMap = ImmutableMap.builder(); | ||
| switch (wellKnownProto) { | ||
| case JSON_STRUCT_VALUE: | ||
| fieldInfoMap.put( | ||
| "fields", | ||
| new FieldDescriptor( | ||
| "google.protobuf.Struct.fields", | ||
| "MESSAGE", | ||
| "Fields", | ||
| FieldDescriptor.ValueType.MAP.toString(), | ||
| FieldDescriptor.Type.MESSAGE.toString(), | ||
| String.valueOf(false), | ||
| "com.google.protobuf.Struct$FieldsEntry", | ||
| "google.protobuf.Struct.FieldsEntry")); | ||
| break; | ||
| case BOOL_VALUE: | ||
| fieldInfoMap.put( | ||
| "value", | ||
| newPrimitiveFieldInfo( | ||
| "google.protobuf.BoolValue", | ||
| "BOOLEAN", | ||
| FieldDescriptor.ValueType.SCALAR, | ||
| FieldDescriptor.Type.BOOL)); | ||
| break; | ||
| case BYTES_VALUE: | ||
| fieldInfoMap.put( | ||
| "value", | ||
| newPrimitiveFieldInfo( | ||
| "google.protobuf.BytesValue", | ||
| "BYTE_STRING", | ||
| FieldDescriptor.ValueType.SCALAR, | ||
| FieldDescriptor.Type.BYTES)); | ||
| break; | ||
| case DOUBLE_VALUE: | ||
| fieldInfoMap.put( | ||
| "value", | ||
| newPrimitiveFieldInfo( | ||
| "google.protobuf.DoubleValue", | ||
| "DOUBLE", | ||
| FieldDescriptor.ValueType.SCALAR, | ||
| FieldDescriptor.Type.DOUBLE)); | ||
| break; | ||
| case FLOAT_VALUE: | ||
| fieldInfoMap.put( | ||
| "value", | ||
| newPrimitiveFieldInfo( | ||
| "google.protobuf.FloatValue", | ||
| "FLOAT", | ||
| FieldDescriptor.ValueType.SCALAR, | ||
| FieldDescriptor.Type.FLOAT)); | ||
| break; | ||
| case INT32_VALUE: | ||
| fieldInfoMap.put( | ||
| "value", | ||
| newPrimitiveFieldInfo( | ||
| "google.protobuf.Int32Value", | ||
| "INT", | ||
| FieldDescriptor.ValueType.SCALAR, | ||
| FieldDescriptor.Type.INT32)); | ||
| break; | ||
| case INT64_VALUE: | ||
| fieldInfoMap.put( | ||
| "value", | ||
| newPrimitiveFieldInfo( | ||
| "google.protobuf.Int64Value", | ||
| "LONG", | ||
| FieldDescriptor.ValueType.SCALAR, | ||
| FieldDescriptor.Type.INT64)); | ||
| break; | ||
| case STRING_VALUE: | ||
| fieldInfoMap.put( | ||
| "value", | ||
| newPrimitiveFieldInfo( | ||
| "google.protobuf.StringValue", | ||
| "STRING", | ||
| FieldDescriptor.ValueType.SCALAR, | ||
| FieldDescriptor.Type.STRING)); | ||
| break; | ||
| case UINT32_VALUE: | ||
| fieldInfoMap.put( | ||
| "value", | ||
| newPrimitiveFieldInfo( | ||
| "google.protobuf.UInt32Value", | ||
| "INT", | ||
| FieldDescriptor.ValueType.SCALAR, | ||
| FieldDescriptor.Type.UINT32)); | ||
| break; | ||
| case UINT64_VALUE: | ||
| fieldInfoMap.put( | ||
| "value", | ||
| newPrimitiveFieldInfo( | ||
| "google.protobuf.UInt64Value", | ||
| "LONG", | ||
| FieldDescriptor.ValueType.SCALAR, | ||
| FieldDescriptor.Type.UINT64)); | ||
| break; | ||
| case JSON_VALUE: | ||
| case JSON_LIST_VALUE: | ||
| case DURATION_VALUE: | ||
| case TIMESTAMP_VALUE: | ||
| // TODO: Complete these | ||
| break; | ||
| default: | ||
| break; | ||
| } | ||
|
|
||
| return new MessageDescriptor( | ||
| wellKnownProto.typeName(), wellKnownProto.javaClassName(), fieldInfoMap.buildOrThrow()); | ||
| } | ||
|
|
||
| private static FieldDescriptor newPrimitiveFieldInfo( | ||
| String fullyQualifiedProtoName, | ||
| String javaTypeName, | ||
| FieldDescriptor.ValueType valueType, | ||
| FieldDescriptor.Type protoFieldType) { | ||
| return new FieldDescriptor( | ||
| fullyQualifiedProtoName + ".value", | ||
| javaTypeName, | ||
| "Value", | ||
| valueType.toString(), | ||
| protoFieldType.toString(), | ||
| String.valueOf(false), | ||
| "", | ||
| fullyQualifiedProtoName); | ||
| } | ||
|
|
||
| private CelLiteDescriptorPool(ImmutableSet<CelLiteDescriptor> descriptors) { | ||
| ImmutableMap.Builder<String, MessageDescriptor> protoFqnMapBuilder = ImmutableMap.builder(); | ||
| ImmutableMap.Builder<String, MessageDescriptor> protoJavaClassNameMapBuilder = | ||
| ImmutableMap.builder(); | ||
| for (WellKnownProto wellKnownProto : WellKnownProto.values()) { | ||
| MessageDescriptor wktMessageInfo = newMessageInfo(wellKnownProto); | ||
| protoFqnMapBuilder.put(wellKnownProto.typeName(), wktMessageInfo); | ||
| protoJavaClassNameMapBuilder.put(wellKnownProto.javaClassName(), wktMessageInfo); | ||
| } | ||
|
|
||
| for (CelLiteDescriptor descriptor : descriptors) { | ||
| protoFqnMapBuilder.putAll(descriptor.getProtoTypeNamesToDescriptors()); | ||
| protoJavaClassNameMapBuilder.putAll(descriptor.getProtoJavaClassNameToDescriptors()); | ||
| } | ||
|
|
||
| this.protoFqnToMessageInfo = protoFqnMapBuilder.buildOrThrow(); | ||
| this.protoJavaClassNameToMessageInfo = protoJavaClassNameMapBuilder.buildOrThrow(); | ||
| } | ||
| } |
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