/**
* 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.eigenbase.reltype.RelDataTypeFactory;
import org.eigenbase.reltype.RelDataTypeField;
import org.eigenbase.reltype.RelDataTypeFieldImpl;
import org.eigenbase.sql.type.SqlTypeName;
import com.google.common.collect.Lists;
public class RelDataTypeHolder {
static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(RelDataTypeHolder.class);
List<RelDataTypeField> fields = Lists.newArrayList();
private RelDataTypeFactory typeFactory;
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, "*");
}
}
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 */
RelDataTypeField newField = new RelDataTypeFieldImpl(fieldName, fields.size(), typeFactory.createTypeWithNullability(typeFactory.createSqlType(SqlTypeName.ANY), true));
/* Add the name to our list of field names */
fields.add(newField);
return newField;
}
public List<String> getFieldNames() {
List<String> fieldNames = Lists.newArrayList();
for(RelDataTypeField f : fields){
fieldNames.add(f.getName());
};
return fieldNames;
}
public void setRelDataTypeFactory(RelDataTypeFactory typeFactory) {
this.typeFactory = typeFactory;
}
@Override
public int hashCode() {
return System.identityHashCode(this);
}
@Override
public boolean equals(Object obj) {
return (this == obj);
}
private List<RelDataTypeField> getFieldList() {
return getFieldList(this.typeFactory);
}
}