spark ColumnarMap 源码
spark ColumnarMap 代码
文件路径：/sql/catalyst/src/main/java/org/apache/spark/sql/vectorized/ColumnarMap.java
/*
* 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.spark.sql.vectorized;
import org.apache.spark.sql.catalyst.util.ArrayBasedMapData;
import org.apache.spark.sql.catalyst.util.MapData;
/**
* Map abstraction in {@link ColumnVector}.
*/
public final class ColumnarMap extends MapData {
private final ColumnarArray keys;
private final ColumnarArray values;
private final int length;
public ColumnarMap(ColumnVector keys, ColumnVector values, int offset, int length) {
this.length = length;
this.keys = new ColumnarArray(keys, offset, length);
this.values = new ColumnarArray(values, offset, length);
}
@Override
public int numElements() { return length; }
@Override
public ColumnarArray keyArray() {
return keys;
}
@Override
public ColumnarArray valueArray() {
return values;
}
@Override
public MapData copy() {
return new ArrayBasedMapData(keys.copy(), values.copy());
}
}
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