Fix for keeping lists structure

java/org/chromium/distiller/webdocument/WebTag.java

Index: java/org/chromium/distiller/webdocument/WebTag.java
diff --git a/java/org/chromium/distiller/webdocument/WebTag.java b/java/org/chromium/distiller/webdocument/WebTag.java
new file mode 100644
index 0000000000000000000000000000000000000000..7ea05df7701b64467da08f72fe2878ea237dbf38
--- /dev/null
+++ b/java/org/chromium/distiller/webdocument/WebTag.java
@@ -0,0 +1,44 @@
+package org.chromium.distiller.webdocument;
+
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * This class represents HTML tags that need to be preserved over the
+ * distillation process.
+ */
+public class WebTag extends WebElement {
+    private String tagName;
+    private TagType tagType;
+
+    public enum TagType {
+        START, END
+    }
+
+    private static List<String> canBeNestedTags = Arrays.asList("UL", "OL", "LI");

[mdjones, 2015/08/06 15:26:20]

Why not Set/HashSet? The TableClassifier and EmbedExtractors do something
similar.

As for the name, maybe "nestingTags"?

+
+    public WebTag(String tagName, TagType tagType) {
+        this.tagName = tagName;
+        this.tagType = tagType;
+    }
+
+    public boolean isStartTag() {
+        return tagType == TagType.START;
+    }
+
+    public String getTagName() {
+        return tagName;
+    }
+
+    @Override
+    public String generateOutput(boolean textOnly) {
+        if (textOnly) {
+            return "";
+        }
+        return "<" + (isStartTag() ? "" : "/") + tagName + ">";
+    }
+
+    public static boolean canBeNested(String tagName) {
+        return canBeNestedTags.contains(tagName);
+    }
+}