spark LAPACK 源码
spark LAPACK 代码
文件路径：/mllib/src/main/scala/org/apache/spark/mllib/linalg/LAPACK.scala
/*
* 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.mllib.linalg
import dev.ludovic.netlib.lapack.{JavaLAPACK => NetlibJavaLAPACK, LAPACK => NetlibLAPACK, NativeLAPACK => NetlibNativeLAPACK}
/**
* LAPACK routines for MLlib's vectors and matrices.
*/
private[spark] object LAPACK extends Serializable {
@transient private var _javaLAPACK: NetlibLAPACK = _
@transient private var _nativeLAPACK: NetlibLAPACK = _
private[spark] def javaLAPACK: NetlibLAPACK = {
if (_javaLAPACK == null) {
_javaLAPACK = NetlibJavaLAPACK.getInstance
}
_javaLAPACK
}
private[spark] def nativeLAPACK: NetlibLAPACK = {
if (_nativeLAPACK == null) {
_nativeLAPACK =
try { NetlibNativeLAPACK.getInstance } catch { case _: Throwable => javaLAPACK }
}
_nativeLAPACK
}
}
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