/*
* 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.store.mock;
import org.apache.drill.exec.vector.ValueVector;
/**
* Interface which all mock column data generators must
* implement. Each has a {@link #setup} method which is given
* the column definition for the column. This definition may have
* additional configuration information for the column (column width,
* precision, etc.). Each also has a {@link #setValue} method that
* does the work of setting a specific value vector position to the
* generated value. The implementation is expected to cast the
* vector to the type supported by that particular generator.
* (This is test code; we're not overly concerned with the overhead
* of such casts.)
*/
public interface FieldGen {
void setup(ColumnDef colDef);
void setValue(ValueVector v, int index);
}