From 7a467207a40345a777935545d5315f31d3c6b7c8 Mon Sep 17 00:00:00 2001
From: Joel Therrien <joel@joeltherrien.ca>
Date: Fri, 29 Jun 2018 12:04:59 -0700
Subject: [PATCH] Initial commit; some base classes have been defined but no
 logic exists yet.

---
 .gitignore                                    |  4 ++
 src/ca/joeltherrien/randomforest/Main.java    | 10 +++++
 src/ca/joeltherrien/randomforest/Node.java    |  5 +++
 .../randomforest/NumericSplitRule.java        | 44 +++++++++++++++++++
 src/ca/joeltherrien/randomforest/Row.java     | 33 ++++++++++++++
 src/ca/joeltherrien/randomforest/Split.java   | 20 +++++++++
 .../joeltherrien/randomforest/SplitRule.java  |  9 ++++
 src/ca/joeltherrien/randomforest/Value.java   |  7 +++
 .../exceptions/MissingValueException.java     | 17 +++++++
 9 files changed, 149 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 src/ca/joeltherrien/randomforest/Main.java
 create mode 100644 src/ca/joeltherrien/randomforest/Node.java
 create mode 100644 src/ca/joeltherrien/randomforest/NumericSplitRule.java
 create mode 100644 src/ca/joeltherrien/randomforest/Row.java
 create mode 100644 src/ca/joeltherrien/randomforest/Split.java
 create mode 100644 src/ca/joeltherrien/randomforest/SplitRule.java
 create mode 100644 src/ca/joeltherrien/randomforest/Value.java
 create mode 100644 src/ca/joeltherrien/randomforest/exceptions/MissingValueException.java

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..f61aa0d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+.classpath
+.settings
+.project
+target/
diff --git a/src/ca/joeltherrien/randomforest/Main.java b/src/ca/joeltherrien/randomforest/Main.java
new file mode 100644
index 0000000..1ae6537
--- /dev/null
+++ b/src/ca/joeltherrien/randomforest/Main.java
@@ -0,0 +1,10 @@
+package ca.joeltherrien.randomforest;
+
+public class Main {
+
+	public static void main(String[] args) {
+		System.out.println("Hello world!");
+
+	}
+
+}
diff --git a/src/ca/joeltherrien/randomforest/Node.java b/src/ca/joeltherrien/randomforest/Node.java
new file mode 100644
index 0000000..fa6efce
--- /dev/null
+++ b/src/ca/joeltherrien/randomforest/Node.java
@@ -0,0 +1,5 @@
+package ca.joeltherrien.randomforest;
+
+public class Node {
+
+}
diff --git a/src/ca/joeltherrien/randomforest/NumericSplitRule.java b/src/ca/joeltherrien/randomforest/NumericSplitRule.java
new file mode 100644
index 0000000..d4e3fa9
--- /dev/null
+++ b/src/ca/joeltherrien/randomforest/NumericSplitRule.java
@@ -0,0 +1,44 @@
+package ca.joeltherrien.randomforest;
+
+import java.util.LinkedList;
+import java.util.List;
+
+import ca.joeltherrien.randomforest.exceptions.MissingValueException;
+
+public class NumericSplitRule implements SplitRule{
+
+	public final String covariateName;	
+	public final double threshold;
+	
+	public NumericSplitRule(String covariateName, double threshold) {
+		super();
+		this.covariateName = covariateName;
+		this.threshold = threshold;
+	}
+	
+	@Override
+	public final String toString() {
+		return "NumericSplitRule on " + covariateName + " at " + threshold;
+	}
+
+	@Override
+	public <Y> Split<Y> applyRule(List<Row<Y>> rows) {
+		final List<Row<Y>> leftHand = new LinkedList<>();
+		final List<Row<Y>> rightHand = new LinkedList<>();
+		
+		for(final Row<Y> row : rows) {
+			final Value x = row.getCovariate(covariateName);
+			if(x == null) {
+				throw new MissingValueException(row, this);
+			}
+			
+			final NumericValue xNum = (NumericValue) x;
+			
+		}
+		
+		// TODO Auto-generated method stub
+		return null;
+	}
+	
+	
+}
diff --git a/src/ca/joeltherrien/randomforest/Row.java b/src/ca/joeltherrien/randomforest/Row.java
new file mode 100644
index 0000000..ca379ae
--- /dev/null
+++ b/src/ca/joeltherrien/randomforest/Row.java
@@ -0,0 +1,33 @@
+package ca.joeltherrien.randomforest;
+
+import java.util.Map;
+
+public class Row<Y> {
+	
+	private final Map<String, Value> covariates;
+	private final Y response;
+	private final int id;
+	
+	public Row(Map<String, Value> covariates, Y response, int id) {
+		super();
+		this.covariates = covariates;
+		this.response = response;
+		this.id = id;
+	}
+	
+	public Value getCovariate(String name) {
+		return this.covariates.get(name);
+	}
+	
+	public Y getResponse() {
+		return this.response;
+	}
+	
+	@Override
+	public String toString() {
+		return "Row " + this.id;
+	}
+	
+	
+	
+}
diff --git a/src/ca/joeltherrien/randomforest/Split.java b/src/ca/joeltherrien/randomforest/Split.java
new file mode 100644
index 0000000..741b608
--- /dev/null
+++ b/src/ca/joeltherrien/randomforest/Split.java
@@ -0,0 +1,20 @@
+package ca.joeltherrien.randomforest;
+
+import java.util.List;
+
+/**
+ * Very simple class that contains two lists; it's essentially a tuple.
+ * 
+ * @author joel
+ *
+ */
+public class Split<Y> {
+
+	public final List<Row<Y>> leftHand;
+	public final List<Row<Y>> rightHand;
+	
+	public Split(List<Row<Y>> leftHand, List<Row<Y>> rightHand){
+		this.leftHand = leftHand;
+		this.rightHand = rightHand;
+	}
+}
diff --git a/src/ca/joeltherrien/randomforest/SplitRule.java b/src/ca/joeltherrien/randomforest/SplitRule.java
new file mode 100644
index 0000000..d7efca6
--- /dev/null
+++ b/src/ca/joeltherrien/randomforest/SplitRule.java
@@ -0,0 +1,9 @@
+package ca.joeltherrien.randomforest;
+
+import java.util.List;
+
+public interface SplitRule {
+
+	<Y> Split<Y> applyRule(List<Row<Y>> rows);
+	
+}
diff --git a/src/ca/joeltherrien/randomforest/Value.java b/src/ca/joeltherrien/randomforest/Value.java
new file mode 100644
index 0000000..f92affe
--- /dev/null
+++ b/src/ca/joeltherrien/randomforest/Value.java
@@ -0,0 +1,7 @@
+package ca.joeltherrien.randomforest;
+
+public interface Value {
+
+	// TODO
+	
+}
diff --git a/src/ca/joeltherrien/randomforest/exceptions/MissingValueException.java b/src/ca/joeltherrien/randomforest/exceptions/MissingValueException.java
new file mode 100644
index 0000000..1de5e30
--- /dev/null
+++ b/src/ca/joeltherrien/randomforest/exceptions/MissingValueException.java
@@ -0,0 +1,17 @@
+package ca.joeltherrien.randomforest.exceptions;
+
+import ca.joeltherrien.randomforest.Row;
+import ca.joeltherrien.randomforest.SplitRule;
+
+public class MissingValueException extends RuntimeException{
+
+	/**
+	 * 
+	 */
+	private static final long serialVersionUID = 6808060079431207726L;
+	
+	public MissingValueException(Row<?> row, SplitRule rule) {
+		super("Missing value at row " + row + rule);
+	}
+
+}