Github user myui commented on a diff in the pull request:
https://github.com/apache/incubator-hivemall/pull/93#discussion_r125178624
--- Diff: core/src/main/java/hivemall/smile/tools/MatrixEventStream.java ---
@@ -0,0 +1,79 @@
+package hivemall.smile.tools;
+
+import java.util.Iterator;
+import java.util.List;
+
+import hivemall.math.matrix.Matrix;
+import hivemall.smile.data.Attribute;
+import hivemall.smile.data.Attribute.AttributeType;
+import opennlp.model.AbstractEventStream;
+import opennlp.model.Event;
+
+public class MatrixEventStream extends AbstractEventStream {
+ Matrix ds;
+ int[] y;
+ Attribute[] attrs;
+ int rowNum;
+ Event next;
+
+ public MatrixEventStream (Matrix ds, int[] y, Attribute[] attrs) {
+ this.ds = ds;
+ this.y = y;
+ this.attrs = attrs;
+ rowNum = 0;
+
+ if (rowNum < ds.numRows()){
+ next = createEvent(ds.getRow(rowNum), y[rowNum]);
+ };
+ }
+
+ /**
+ * Returns the next Event object held in this EventStream. Each call
to nextEvent advances the EventStream.
+ *
+ * @return the Event object which is next in this EventStream
+ */
+ public Event next () {
+ while (next == null && (rowNum < ds.numRows()))
--- End diff --
`{}` is needed to [Google coding
style](https://google.github.io/styleguide/javaguide.html#s4.1.2-blocks-k-r-style)
that Hivemall follows.
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