-
Notifications
You must be signed in to change notification settings - Fork 2.4k
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
[CALCITE-5968] Provide an interface class for RexExecutable to decoup…
…le janino runtime binding
- Loading branch information
1 parent
2bf1e7b
commit d508405
Showing
6 changed files
with
300 additions
and
93 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
117 changes: 117 additions & 0 deletions
117
core/src/main/java/org/apache/calcite/rex/RexExecutableImpl.java
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,117 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to you 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 org.apache.calcite.rex; | ||
|
|
||
| import org.apache.calcite.DataContext; | ||
| import org.apache.calcite.linq4j.function.Function1; | ||
| import org.apache.calcite.runtime.Hook; | ||
| import org.apache.calcite.runtime.Utilities; | ||
| import org.apache.calcite.util.Pair; | ||
|
|
||
| import org.checkerframework.checker.nullness.qual.Nullable; | ||
| import org.codehaus.commons.compiler.CompileException; | ||
| import org.codehaus.janino.ClassBodyEvaluator; | ||
| import org.codehaus.janino.Scanner; | ||
|
|
||
| import java.io.IOException; | ||
| import java.io.Serializable; | ||
| import java.io.StringReader; | ||
| import java.lang.reflect.Constructor; | ||
| import java.lang.reflect.InvocationTargetException; | ||
| import java.util.Arrays; | ||
| import java.util.List; | ||
|
|
||
| import static java.util.Objects.requireNonNull; | ||
|
|
||
| /** | ||
| * Result of compiling code generated from a {@link RexNode} expression. | ||
| */ | ||
| public class RexExecutableImpl implements RexExecutable { | ||
| private static final String GENERATED_CLASS_NAME = "Reducer"; | ||
|
|
||
| private final Function1<DataContext, @Nullable Object @Nullable []> compiledFunction; | ||
| private final String code; | ||
| private @Nullable DataContext dataContext; | ||
|
|
||
| public RexExecutableImpl(String code, Object reason) { | ||
| this.code = code; | ||
| this.compiledFunction = compile(code, reason); | ||
| } | ||
|
|
||
| private static Function1<DataContext, @Nullable Object @Nullable []> compile(String code, | ||
| Object reason) { | ||
| try { | ||
| final ClassBodyEvaluator cbe = new ClassBodyEvaluator(); | ||
| cbe.setClassName(GENERATED_CLASS_NAME); | ||
| cbe.setExtendedClass(Utilities.class); | ||
| cbe.setImplementedInterfaces(new Class[] {Function1.class, Serializable.class}); | ||
| cbe.setParentClassLoader(RexExecutableImpl.class.getClassLoader()); | ||
| cbe.cook(new Scanner(null, new StringReader(code))); | ||
| Class c = cbe.getClazz(); | ||
| //noinspection unchecked | ||
| final Constructor<Function1<DataContext, @Nullable Object @Nullable []>> constructor = | ||
| c.getConstructor(); | ||
| return constructor.newInstance(); | ||
| } catch (CompileException | IOException | InstantiationException | ||
| | IllegalAccessException | InvocationTargetException | ||
| | NoSuchMethodException e) { | ||
| throw new RuntimeException("While compiling " + reason, e); | ||
| } | ||
| } | ||
|
|
||
| @Override public void setDataContext(DataContext dataContext) { | ||
| this.dataContext = dataContext; | ||
| } | ||
|
|
||
| @Override public void reduce(RexBuilder rexBuilder, List<RexNode> constExps, | ||
| List<RexNode> reducedValues) { | ||
| @Nullable Object[] values; | ||
| try { | ||
| values = execute(); | ||
| if (values == null) { | ||
| reducedValues.addAll(constExps); | ||
| values = new Object[constExps.size()]; | ||
| } else { | ||
| assert values.length == constExps.size(); | ||
| final List<@Nullable Object> valueList = Arrays.asList(values); | ||
| for (Pair<RexNode, @Nullable Object> value : Pair.zip(constExps, valueList)) { | ||
| reducedValues.add( | ||
| rexBuilder.makeLiteral(value.right, value.left.getType(), true)); | ||
| } | ||
| } | ||
| } catch (RuntimeException e) { | ||
| // One or more of the expressions failed. | ||
| // Don't reduce any of the expressions. | ||
| reducedValues.clear(); | ||
| reducedValues.addAll(constExps); | ||
| values = new Object[constExps.size()]; | ||
| } | ||
| Hook.EXPRESSION_REDUCER.run(Pair.of(code, values)); | ||
| } | ||
|
|
||
| public Function1<DataContext, @Nullable Object @Nullable []> getFunction() { | ||
| return compiledFunction; | ||
| } | ||
|
|
||
| @Override public @Nullable Object @Nullable [] execute() { | ||
| return compiledFunction.apply(requireNonNull(dataContext, "dataContext")); | ||
| } | ||
|
|
||
| public String getSource() { | ||
| return code; | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.