spark ARPACK 源码
spark ARPACK 代码
文件路径：/mllib/src/main/scala/org/apache/spark/mllib/linalg/ARPACK.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.arpack.{ARPACK => NetlibARPACK, JavaARPACK => NetlibJavaARPACK, NativeARPACK => NetlibNativeARPACK}
/**
* ARPACK routines for MLlib's vectors and matrices.
*/
private[spark] object ARPACK extends Serializable {
@transient private var _javaARPACK: NetlibARPACK = _
@transient private var _nativeARPACK: NetlibARPACK = _
private[spark] def javaARPACK: NetlibARPACK = {
if (_javaARPACK == null) {
_javaARPACK = NetlibJavaARPACK.getInstance
}
_javaARPACK
}
private[spark] def nativeARPACK: NetlibARPACK = {
if (_nativeARPACK == null) {
_nativeARPACK =
try { NetlibNativeARPACK.getInstance } catch { case _: Throwable => javaARPACK }
}
_nativeARPACK
}
}
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