From 221ea813d2479a16c489b1940efd87f4afce3f8c Mon Sep 17 00:00:00 2001
From: Hai Liu <hai.liu@huawei.com>
Date: Wed, 20 Apr 2016 09:48:26 +0800
Subject: Add classfier to predictor JIRA: PREDICTION-40

Change-Id: I0b35d13a4ad1dab0f32fe7df7fea3de4d40eeb0e
---
 src/predictor/ClassifierAdapter.java | 76 ++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 src/predictor/ClassifierAdapter.java

diff --git a/src/predictor/ClassifierAdapter.java b/src/predictor/ClassifierAdapter.java
new file mode 100644
index 0000000..79dab7e
--- /dev/null
+++ b/src/predictor/ClassifierAdapter.java
@@ -0,0 +1,76 @@
+package predictor;
+
+import java.util.Random;
+
+import org.apache.log4j.*;
+
+import weka.core.*;
+import weka.classifiers.*;
+
+public class ClassifierAdapter implements PredictorInterface {
+	protected Logger logger = Logger.getLogger(ClassifierAdapter.class);
+
+	protected String name;
+	protected Classifier classifier;
+	protected Evaluation eval;
+
+	public ClassifierAdapter(Classifier classifier, String name) {
+		this.classifier = classifier;
+		this.name = name;
+	}
+
+	@Override
+	public String getName() {
+		return this.name;
+	}
+
+	@Override
+	public void crossValidate(Instances instances, int numFold, Random rand) throws Exception {
+		eval = new Evaluation(instances);
+		eval.crossValidateModel(this.classifier, instances, numFold, rand);
+	}
+
+	public String getEvaluationSummaryString() {
+		return this.eval.toSummaryString();
+	}
+
+	public String getEvaluationMatrixString() throws Exception {
+		return this.eval.toMatrixString();
+	}
+	
+	public FastVector getEvaluationPredictions() {
+		return eval.predictions();
+	}
+
+	@Override
+	public void train(Instances instances) throws Exception {
+		this.classifier.buildClassifier(instances);
+	}
+	
+	@Override
+	public int predict(Instance instance) throws Exception {
+		this.classifier.classifyInstance(instance);
+		return 0;
+	}
+
+	@Override
+	public int predict(Instances instances) throws Exception {
+		for (int i=0;i<instances.numInstances();i++) {
+			this.predict(instances.instance(i));
+		}
+		return 0;
+	}
+	
+	@Override
+	public String getEvaluationResults() throws Exception {
+		String results = "\n-- ";
+		results += this.getName();
+		results += " --\n";
+		results += this.eval.toSummaryString();
+		results += this.eval.toMatrixString();
+		results += this.eval.toClassDetailsString();
+		results += "\n";
+		return results;
+	}
+}
+
-- 
cgit 1.2.3-korg