catalyst/expressions/UnsafeDataUtils.java

0001 /*
0002  * Licensed to the Apache Software Foundation (ASF) under one or more
0003  * contributor license agreements.  See the NOTICE file distributed with
0004  * this work for additional information regarding copyright ownership.
0005  * The ASF licenses this file to You under the Apache License, Version 2.0
0006  * (the "License"); you may not use this file except in compliance with
0007  * the License.  You may obtain a copy of the License at
0008  *
0009  *    http://www.apache.org/licenses/LICENSE-2.0
0010  *
0011  * Unless required by applicable law or agreed to in writing, software
0012  * distributed under the License is distributed on an "AS IS" BASIS,
0013  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
0014  * See the License for the specific language governing permissions and
0015  * limitations under the License.
0016  */
0017 package org.apache.spark.sql.catalyst.expressions;
0018
0019 import org.apache.spark.unsafe.Platform;
0020
0021 /**
0022  * General utilities available for unsafe data
0023  */
0024 final class UnsafeDataUtils {
0025
0026   private UnsafeDataUtils() {
0027   }
0028
0029   public static byte[] getBytes(Object baseObject, long baseOffset, int sizeInBytes) {
0030     if (baseObject instanceof byte[]
0031       && baseOffset == Platform.BYTE_ARRAY_OFFSET
0032       && (((byte[]) baseObject).length == sizeInBytes)) {
0033       return (byte[]) baseObject;
0034     }
0035     byte[] bytes = new byte[sizeInBytes];
0036     Platform.copyMemory(baseObject, baseOffset, bytes, Platform.BYTE_ARRAY_OFFSET,
0037       sizeInBytes);
0038     return bytes;
0039   }
0040 }