forked from antonis.lempesis/dnet-hadoop
reformat code
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@ -74,6 +74,7 @@ public class SparkCreateConnectedComponent {
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}
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public static long getHashcode(final String id) {
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return Hashing.murmur3_128().hashUnencodedChars(id).asLong();
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return Hashing.murmur3_128().hashString(id).asLong();
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}
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}
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@ -8,22 +8,33 @@ object DatasetJoiner {
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def startJoin(spark: SparkSession, relPath:String, targetPath:String) {
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val relation = spark.read.load(relPath)
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val relatedPublication = relation.where("target like '50%'").groupBy("source").agg(count("target").as("publication")).select(col("source"). alias("p_source"), col("publication"))
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val relatedDataset = relation.where("target like '60%'").groupBy("source").agg(count("target").as("dataset")).select(col("source"). alias("d_source"), col("dataset"))
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val relatedUnknown = relation.where("target like '70%'").groupBy("source").agg(count("target").as("unknown")).select(col("source"). alias("u_source"), col("unknown"))
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val relatedPublication = relation
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.where("target like '50%'")
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.groupBy("source")
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.agg(count("target").as("publication"))
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.select(col("source"). alias("p_source"), col("publication"))
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val relatedDataset = relation
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.where("target like '60%'")
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.groupBy("source")
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.agg(count("target").as("dataset"))
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.select(col("source"). alias("d_source"), col("dataset"))
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val relatedUnknown = relation
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.where("target like '70%'")
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.groupBy("source")
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.agg(count("target").as("unknown"))
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.select(col("source"). alias("u_source"), col("unknown"))
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val firstJoin = relatedPublication
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.join(relatedDataset,col("p_source").equalTo(col("d_source")),"full")
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.select(coalesce(col("p_source"), col("d_source")).alias("id"),
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col("publication"),
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col("dataset"))
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.join(relatedUnknown, col("u_source").equalTo(col("id")),"full")
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.select(coalesce(col("u_source"), col("id")).alias("source"),
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coalesce(col("publication"),lit(0)).alias("relatedPublication"),
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coalesce(col("dataset"),lit(0)).alias("relatedDataset"),
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coalesce(col("unknown"),lit(0)).alias("relatedUnknown")
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)
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.join(relatedDataset,col("p_source").equalTo(col("d_source")),"full")
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.select( coalesce( col("p_source"), col("d_source")).alias("id"),
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col("publication"),
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col("dataset"))
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.join(relatedUnknown, col("u_source").equalTo(col("id")),"full")
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.select( coalesce(col("u_source"), col("id")).alias("source"),
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coalesce(col("publication"),lit(0)).alias("relatedPublication"),
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coalesce(col("dataset"),lit(0)).alias("relatedDataset"),
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coalesce(col("unknown"),lit(0)).alias("relatedUnknown")
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)
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firstJoin.write.mode("overwrite").save(targetPath)
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}
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}
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