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| 1 | +// Copyright 2025 Google LLC |
| 2 | +// |
| 3 | +// Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | +// you may not use this file except in compliance with the License. |
| 5 | +// You may obtain a copy of the License at |
| 6 | +// |
| 7 | +// https://www.apache.org/licenses/LICENSE-2.0 |
| 8 | +// |
| 9 | +// Unless required by applicable law or agreed to in writing, software |
| 10 | +// distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | +// See the License for the specific language governing permissions and |
| 13 | +// limitations under the License. |
| 14 | + |
| 15 | +package dev.cel.common.internal; |
| 16 | + |
| 17 | +import com.google.common.collect.ImmutableMap; |
| 18 | +import com.google.common.collect.ImmutableSet; |
| 19 | +import com.google.errorprone.annotations.Immutable; |
| 20 | +import dev.cel.common.annotations.Internal; |
| 21 | +import dev.cel.protobuf.CelLiteDescriptor; |
| 22 | +import dev.cel.protobuf.CelLiteDescriptor.FieldDescriptor; |
| 23 | +import dev.cel.protobuf.CelLiteDescriptor.MessageDescriptor; |
| 24 | +import java.util.Optional; |
| 25 | + |
| 26 | +/** Descriptor pool for {@link CelLiteDescriptor}s. */ |
| 27 | +@Immutable |
| 28 | +@Internal |
| 29 | +public final class CelLiteDescriptorPool { |
| 30 | + private final ImmutableMap<String, MessageDescriptor> protoFqnToMessageInfo; |
| 31 | + private final ImmutableMap<String, MessageDescriptor> protoJavaClassNameToMessageInfo; |
| 32 | + |
| 33 | + public static CelLiteDescriptorPool newInstance(ImmutableSet<CelLiteDescriptor> descriptors) { |
| 34 | + return new CelLiteDescriptorPool(descriptors); |
| 35 | + } |
| 36 | + |
| 37 | + public Optional<MessageDescriptor> findMessageInfoByTypeName(String protoFqn) { |
| 38 | + return Optional.ofNullable(protoFqnToMessageInfo.get(protoFqn)); |
| 39 | + } |
| 40 | + |
| 41 | + public Optional<MessageDescriptor> findMessageInfoByClassName(String javaClassName) { |
| 42 | + return Optional.ofNullable(protoJavaClassNameToMessageInfo.get(javaClassName)); |
| 43 | + } |
| 44 | + |
| 45 | + private static MessageDescriptor newMessageInfo(WellKnownProto wellKnownProto) { |
| 46 | + ImmutableMap.Builder<String, FieldDescriptor> fieldInfoMap = ImmutableMap.builder(); |
| 47 | + switch (wellKnownProto) { |
| 48 | + case JSON_STRUCT_VALUE: |
| 49 | + fieldInfoMap.put( |
| 50 | + "fields", |
| 51 | + new FieldDescriptor( |
| 52 | + "google.protobuf.Struct.fields", |
| 53 | + "MESSAGE", |
| 54 | + "Fields", |
| 55 | + FieldDescriptor.ValueType.MAP.toString(), |
| 56 | + FieldDescriptor.Type.MESSAGE.toString(), |
| 57 | + String.valueOf(false), |
| 58 | + "com.google.protobuf.Struct$FieldsEntry", |
| 59 | + "google.protobuf.Struct.FieldsEntry")); |
| 60 | + break; |
| 61 | + case BOOL_VALUE: |
| 62 | + fieldInfoMap.put( |
| 63 | + "value", |
| 64 | + newPrimitiveFieldInfo( |
| 65 | + "google.protobuf.BoolValue", |
| 66 | + "BOOLEAN", |
| 67 | + FieldDescriptor.ValueType.SCALAR, |
| 68 | + FieldDescriptor.Type.BOOL)); |
| 69 | + break; |
| 70 | + case BYTES_VALUE: |
| 71 | + fieldInfoMap.put( |
| 72 | + "value", |
| 73 | + newPrimitiveFieldInfo( |
| 74 | + "google.protobuf.BytesValue", |
| 75 | + "BYTE_STRING", |
| 76 | + FieldDescriptor.ValueType.SCALAR, |
| 77 | + FieldDescriptor.Type.BYTES)); |
| 78 | + break; |
| 79 | + case DOUBLE_VALUE: |
| 80 | + fieldInfoMap.put( |
| 81 | + "value", |
| 82 | + newPrimitiveFieldInfo( |
| 83 | + "google.protobuf.DoubleValue", |
| 84 | + "DOUBLE", |
| 85 | + FieldDescriptor.ValueType.SCALAR, |
| 86 | + FieldDescriptor.Type.DOUBLE)); |
| 87 | + break; |
| 88 | + case FLOAT_VALUE: |
| 89 | + fieldInfoMap.put( |
| 90 | + "value", |
| 91 | + newPrimitiveFieldInfo( |
| 92 | + "google.protobuf.FloatValue", |
| 93 | + "FLOAT", |
| 94 | + FieldDescriptor.ValueType.SCALAR, |
| 95 | + FieldDescriptor.Type.FLOAT)); |
| 96 | + break; |
| 97 | + case INT32_VALUE: |
| 98 | + fieldInfoMap.put( |
| 99 | + "value", |
| 100 | + newPrimitiveFieldInfo( |
| 101 | + "google.protobuf.Int32Value", |
| 102 | + "INT", |
| 103 | + FieldDescriptor.ValueType.SCALAR, |
| 104 | + FieldDescriptor.Type.INT32)); |
| 105 | + break; |
| 106 | + case INT64_VALUE: |
| 107 | + fieldInfoMap.put( |
| 108 | + "value", |
| 109 | + newPrimitiveFieldInfo( |
| 110 | + "google.protobuf.Int64Value", |
| 111 | + "LONG", |
| 112 | + FieldDescriptor.ValueType.SCALAR, |
| 113 | + FieldDescriptor.Type.INT64)); |
| 114 | + break; |
| 115 | + case STRING_VALUE: |
| 116 | + fieldInfoMap.put( |
| 117 | + "value", |
| 118 | + newPrimitiveFieldInfo( |
| 119 | + "google.protobuf.StringValue", |
| 120 | + "STRING", |
| 121 | + FieldDescriptor.ValueType.SCALAR, |
| 122 | + FieldDescriptor.Type.STRING)); |
| 123 | + break; |
| 124 | + case UINT32_VALUE: |
| 125 | + fieldInfoMap.put( |
| 126 | + "value", |
| 127 | + newPrimitiveFieldInfo( |
| 128 | + "google.protobuf.UInt32Value", |
| 129 | + "INT", |
| 130 | + FieldDescriptor.ValueType.SCALAR, |
| 131 | + FieldDescriptor.Type.UINT32)); |
| 132 | + break; |
| 133 | + case UINT64_VALUE: |
| 134 | + fieldInfoMap.put( |
| 135 | + "value", |
| 136 | + newPrimitiveFieldInfo( |
| 137 | + "google.protobuf.UInt64Value", |
| 138 | + "LONG", |
| 139 | + FieldDescriptor.ValueType.SCALAR, |
| 140 | + FieldDescriptor.Type.UINT64)); |
| 141 | + break; |
| 142 | + case JSON_VALUE: |
| 143 | + case JSON_LIST_VALUE: |
| 144 | + case DURATION_VALUE: |
| 145 | + case TIMESTAMP_VALUE: |
| 146 | + // TODO: Complete these |
| 147 | + break; |
| 148 | + default: |
| 149 | + break; |
| 150 | + } |
| 151 | + |
| 152 | + return new MessageDescriptor( |
| 153 | + wellKnownProto.typeName(), wellKnownProto.javaClassName(), fieldInfoMap.buildOrThrow()); |
| 154 | + } |
| 155 | + |
| 156 | + private static FieldDescriptor newPrimitiveFieldInfo( |
| 157 | + String fullyQualifiedProtoName, |
| 158 | + String javaTypeName, |
| 159 | + FieldDescriptor.ValueType valueType, |
| 160 | + FieldDescriptor.Type protoFieldType) { |
| 161 | + return new FieldDescriptor( |
| 162 | + fullyQualifiedProtoName + ".value", |
| 163 | + javaTypeName, |
| 164 | + "Value", |
| 165 | + valueType.toString(), |
| 166 | + protoFieldType.toString(), |
| 167 | + String.valueOf(false), |
| 168 | + "", |
| 169 | + fullyQualifiedProtoName); |
| 170 | + } |
| 171 | + |
| 172 | + private CelLiteDescriptorPool(ImmutableSet<CelLiteDescriptor> descriptors) { |
| 173 | + ImmutableMap.Builder<String, MessageDescriptor> protoFqnMapBuilder = ImmutableMap.builder(); |
| 174 | + ImmutableMap.Builder<String, MessageDescriptor> protoJavaClassNameMapBuilder = |
| 175 | + ImmutableMap.builder(); |
| 176 | + for (WellKnownProto wellKnownProto : WellKnownProto.values()) { |
| 177 | + MessageDescriptor wktMessageInfo = newMessageInfo(wellKnownProto); |
| 178 | + protoFqnMapBuilder.put(wellKnownProto.typeName(), wktMessageInfo); |
| 179 | + protoJavaClassNameMapBuilder.put(wellKnownProto.javaClassName(), wktMessageInfo); |
| 180 | + } |
| 181 | + |
| 182 | + for (CelLiteDescriptor descriptor : descriptors) { |
| 183 | + protoFqnMapBuilder.putAll(descriptor.getProtoTypeNamesToDescriptors()); |
| 184 | + protoJavaClassNameMapBuilder.putAll(descriptor.getProtoJavaClassNameToDescriptors()); |
| 185 | + } |
| 186 | + |
| 187 | + this.protoFqnToMessageInfo = protoFqnMapBuilder.buildOrThrow(); |
| 188 | + this.protoJavaClassNameToMessageInfo = protoJavaClassNameMapBuilder.buildOrThrow(); |
| 189 | + } |
| 190 | +} |
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