/**
* 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.drill.exec.compile;
import org.antlr.runtime.ANTLRStringStream;
import org.antlr.runtime.CommonTokenStream;
import org.apache.drill.common.config.DrillConfig;
import org.apache.drill.common.expression.LogicalExpression;
import org.apache.drill.common.expression.SchemaPath;
import org.apache.drill.common.expression.parser.ExprLexer;
import org.apache.drill.common.expression.parser.ExprParser;
import org.apache.drill.common.expression.parser.ExprParser.parse_return;
import org.apache.drill.common.types.TypeProtos.MinorType;
import org.apache.drill.common.types.Types;
import org.apache.drill.exec.expr.CodeGenerator;
import org.apache.drill.exec.expr.EvaluationVisitor;
import org.apache.drill.exec.expr.ValueVectorReadExpression;
import org.apache.drill.exec.expr.ValueVectorWriteExpression;
import org.apache.drill.exec.expr.fn.FunctionImplementationRegistry;
import org.apache.drill.exec.physical.impl.project.Projector;
import org.apache.drill.exec.record.TypedFieldId;
import org.junit.Test;
public class TestEvaluationVisitor {
static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(TestEvaluationVisitor.class);
@Test
public void x() throws Exception{
DrillConfig c = DrillConfig.create();
FunctionImplementationRegistry reg = new FunctionImplementationRegistry(c);
EvaluationVisitor v = new EvaluationVisitor(reg);
CodeGenerator<?> g = CodeGenerator.get(Projector.TEMPLATE_DEFINITION, reg);
SchemaPath path = (SchemaPath) getExpr("a.b[4][2].c[6]");
TypedFieldId id = TypedFieldId.newBuilder() //
.addId(1) //
.addId(3) //
.remainder(path.getRootSegment()) //
.intermediateType(Types.optional(MinorType.MAP))
.finalType(Types.repeated(MinorType.MAP)) //
.hyper() //
.withIndex() //
.build();
ValueVectorReadExpression e = new ValueVectorReadExpression(id);
TypedFieldId outId = TypedFieldId.newBuilder() //
.addId(1) //
.finalType(Types.repeated(MinorType.MAP)) //
.intermediateType(Types.repeated(MinorType.MAP)) //
.build();
ValueVectorWriteExpression e2 = new ValueVectorWriteExpression(outId, e, true);
v.addExpr(e2, g.getRoot());
System.out.println(g.generate());
}
private LogicalExpression getExpr(String expr) throws Exception{
ExprLexer lexer = new ExprLexer(new ANTLRStringStream(expr));
CommonTokenStream tokens = new CommonTokenStream(lexer);
// tokens.fill();
// for(Token t : (List<Token>) tokens.getTokens()){
// System.out.println(t + "" + t.getType());
// }
// tokens.rewind();
ExprParser parser = new ExprParser(tokens);
parse_return ret = parser.parse();
return ret.e;
}
}