Added summary value class

public/biopet-framework/src/main/scala/nl/lumc/sasc/biopet/core/summary/SummaryValue.scala

+package nl.lumc.sasc.biopet.core.summary
+
+import java.math.BigDecimal
+
+/**
+ * Created by pjvan_thof on 4/23/15.
+ */
+case class SummaryValue(val value: Option[Any]) {
+
+  def this(path: List[String],
+           summary: Summary,
+           sampleId: Option[String] = None,
+           libId: Option[String] = None) = {
+    this((sampleId, libId) match {
+      case (Some(sample), Some(lib)) => summary.getLibraryValue(sample, lib, path: _*)
+      case (Some(sample), _)         => summary.getSampleValue(sample, path: _*)
+      case _                         => summary.getValue(path: _*)
+    })
+  }
+
+  def +(that: SummaryValue): SummaryValue = {
+    (this.value, that.value) match {
+      case (Some(a: Double), Some(b)) => SummaryValue(Some(a + b.toString.toDouble))
+      case (Some(a: Int), Some(b))    => SummaryValue(Some(a + b.toString.toInt))
+      case (Some(a), Some(b))         => SummaryValue(Some(a.toString.toDouble + b.toString.toDouble))
+      case _                          => SummaryValue(None)
+    }
+  }
+
+  def -(that: SummaryValue): SummaryValue = {
+    (this.value, that.value) match {
+      case (Some(a: Double), Some(b)) => SummaryValue(Some(a - b.toString.toDouble))
+      case (Some(a: Int), Some(b))    => SummaryValue(Some(a - b.toString.toInt))
+      case (Some(a), Some(b))         => SummaryValue(Some(a.toString.toDouble - b.toString.toDouble))
+      case _                          => SummaryValue(None)
+    }
+  }
+
+  def /(that: SummaryValue): SummaryValue = {
+    (this.value, that.value) match {
+      case (Some(a: Double), Some(b)) => SummaryValue(Some(a / b.toString.toDouble))
+      case (Some(a: Int), Some(b))    => SummaryValue(Some(a / b.toString.toInt))
+      case (Some(a), Some(b))         => SummaryValue(Some(a.toString.toDouble / b.toString.toDouble))
+      case _                          => SummaryValue(None)
+    }
+  }
+
+  def *(that: SummaryValue): SummaryValue = {
+    (this.value, that.value) match {
+      case (Some(a: Double), Some(b)) => SummaryValue(Some(a * b.toString.toDouble))
+      case (Some(a: Int), Some(b))    => SummaryValue(Some(a * b.toString.toInt))
+      case (Some(a), Some(b))         => SummaryValue(Some(a.toString.toDouble * b.toString.toDouble))
+      case _                          => SummaryValue(None)
+    }
+  }
+
+  def %(that: SummaryValue): SummaryValue = {
+    (this.value, that.value) match {
+      case (Some(a: Double), Some(b)) => SummaryValue(Some(a % b.toString.toDouble))
+      case (Some(a: Int), Some(b))    => SummaryValue(Some(a % b.toString.toInt))
+      case (Some(a), Some(b))         => SummaryValue(Some(a.toString.toDouble % b.toString.toDouble))
+      case _                          => SummaryValue(None)
+    }
+  }
+}
+