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/*
* 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.planner.types;
import java.util.List;
import org.apache.drill.shaded.guava.com.google.common.collect.Lists;
import org.apache.calcite.rel.type.DynamicRecordType;
import org.apache.calcite.rel.type.RelDataTypeFactory;
import org.apache.calcite.rel.type.RelDataTypeField;
import org.apache.calcite.rel.type.RelDataTypeFieldImpl;
import org.apache.calcite.sql.type.SqlTypeName;
import org.apache.drill.common.expression.SchemaPath;
public class RelDataTypeHolder extends AbstractRelDataTypeHolder {
public RelDataTypeHolder() {
super(Lists.<RelDataTypeField>newArrayList());
}
public List<RelDataTypeField> getFieldList(RelDataTypeFactory typeFactory) {
addStarIfEmpty(typeFactory);
return fields;
}
public int getFieldCount() {
addStarIfEmpty(this.typeFactory);
return fields.size();
}
private void addStarIfEmpty(RelDataTypeFactory typeFactory) {
if (fields.isEmpty()) {
getField(typeFactory, SchemaPath.DYNAMIC_STAR);
}
}
public RelDataTypeField getField(RelDataTypeFactory typeFactory, String fieldName) {
/* First check if this field name exists in our field list */
for (RelDataTypeField f : fields) {
if (fieldName.equalsIgnoreCase(f.getName())) {
return f;
}
}
/* This field does not exist in our field list add it */
final SqlTypeName typeName = DynamicRecordType.isDynamicStarColName(fieldName)
? SqlTypeName.DYNAMIC_STAR : SqlTypeName.ANY;
// This field does not exist in our field list add it
RelDataTypeField newField = new RelDataTypeFieldImpl(
fieldName,
fields.size(),
typeFactory.createTypeWithNullability(typeFactory.createSqlType(typeName), true));
/* Add the name to our list of field names */
fields.add(newField);
return newField;
}
}
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