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61 changes: 61 additions & 0 deletions
61
...o-pinot/src/main/java/io/trino/plugin/pinot/query/PinotTransformFunctionTypeResolver.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,61 @@ | ||
| /* | ||
| * 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 | ||
| * | ||
| * http://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 io.trino.plugin.pinot.query; | ||
|
|
||
| import org.apache.pinot.common.function.FunctionRegistry; | ||
| import org.apache.pinot.common.function.TransformFunctionType; | ||
| import org.apache.pinot.common.request.context.FunctionContext; | ||
|
|
||
| import java.util.HashMap; | ||
| import java.util.Map; | ||
| import java.util.Optional; | ||
|
|
||
| import static com.google.common.base.Preconditions.checkState; | ||
| import static java.util.Objects.requireNonNull; | ||
| import static org.apache.pinot.common.function.TransformFunctionType.SCALAR; | ||
| import static org.apache.pinot.core.operator.transform.function.TransformFunctionFactory.canonicalize; | ||
|
|
||
| public final class PinotTransformFunctionTypeResolver | ||
| { | ||
| private PinotTransformFunctionTypeResolver() {} | ||
|
|
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| private static final Map<String, TransformFunctionType> TRANSFORM_FUNCTION_TYPE_MAP; | ||
|
|
||
| static | ||
| { | ||
| Map<String, TransformFunctionType> builder = new HashMap<>(); | ||
| for (TransformFunctionType transformFunctionType : TransformFunctionType.values()) { | ||
| for (String alias : transformFunctionType.getAliases()) { | ||
| TransformFunctionType previousValue = builder.put(canonicalize(alias), transformFunctionType); | ||
| checkState(previousValue == null || previousValue == transformFunctionType, "Duplicate key with different values for alias '%s', transform function type '%s' and previous value '%s'", canonicalize(alias), transformFunctionType, previousValue); | ||
| } | ||
| } | ||
| TRANSFORM_FUNCTION_TYPE_MAP = Map.copyOf(builder); | ||
| } | ||
|
|
||
| // Extracted from org.apache.pinot.core.operator.transform.function.TransformFunctionFactory::get | ||
| public static Optional<TransformFunctionType> getTransformFunctionType(FunctionContext function) | ||
| { | ||
| requireNonNull(function, "function is null"); | ||
| String canonicalizedFunctionName = canonicalize(function.getFunctionName()); | ||
| TransformFunctionType transformFunctionType = TRANSFORM_FUNCTION_TYPE_MAP.get(canonicalizedFunctionName); | ||
| if (transformFunctionType != null) { | ||
| return Optional.of(transformFunctionType); | ||
| } | ||
| if (FunctionRegistry.containsFunction(canonicalizedFunctionName)) { | ||
| return Optional.of(SCALAR); | ||
| } | ||
| return Optional.empty(); | ||
| } | ||
| } |
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