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/*
* 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.graphx.impl
import scala.reflect.ClassTag
import org.apache.spark.graphx._
import org.apache.spark.util.collection.BitSet
private[graphx] object VertexPartition {
/** Construct a `VertexPartition` from the given vertices. */
def apply[VD: ClassTag](iter: Iterator[(VertexId, VD)])
: VertexPartition[VD] = {
val (index, values, mask) = VertexPartitionBase.initFrom(iter)
new VertexPartition(index, values, mask)
}
import scala.language.implicitConversions
/**
* Implicit conversion to allow invoking `VertexPartitionBase` operations directly on a
* `VertexPartition`.
*/
implicit def partitionToOps[VD: ClassTag](partition: VertexPartition[VD])
: VertexPartitionOps[VD] = new VertexPartitionOps(partition)
/**
* Implicit evidence that `VertexPartition` is a member of the `VertexPartitionBaseOpsConstructor`
* typeclass. This enables invoking `VertexPartitionBase` operations on a `VertexPartition` via an
* evidence parameter, as in [[VertexPartitionBaseOps]].
*/
implicit object VertexPartitionOpsConstructor
extends VertexPartitionBaseOpsConstructor[VertexPartition] {
def toOps[VD: ClassTag](partition: VertexPartition[VD])
: VertexPartitionBaseOps[VD, VertexPartition] = partitionToOps(partition)
}
}
/** A map from vertex id to vertex attribute. */
private[graphx] class VertexPartition[VD: ClassTag](
val index: VertexIdToIndexMap,
val values: Array[VD],
val mask: BitSet)
extends VertexPartitionBase[VD]
private[graphx] class VertexPartitionOps[VD: ClassTag](self: VertexPartition[VD])
extends VertexPartitionBaseOps[VD, VertexPartition](self) {
def withIndex(index: VertexIdToIndexMap): VertexPartition[VD] = {
new VertexPartition(index, self.values, self.mask)
}
def withValues[VD2: ClassTag](values: Array[VD2]): VertexPartition[VD2] = {
new VertexPartition(self.index, values, self.mask)
}
def withMask(mask: BitSet): VertexPartition[VD] = {
new VertexPartition(self.index, self.values, mask)
}
}
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