Output the simple tree of buggy code.

src/main/java/edu/lu/uni/serval/FixPatternParser/Parser.java

@@ -23,7 +23,7 @@ import edu.lu.uni.serval.gumtree.utils.CUCreator;
 import edu.lu.uni.serval.utils.FileHelper;
 
 /**
- * Parse fix patterns with GumTree..
+ * Parse fix patterns with GumTree.
  * 
  * @author kui.liu
  *
@@ -32,6 +32,7 @@ public class Parser {
 	
 	private String astEditScripts = "";
 	private String patchesSourceCode = "";
+	private String buggyTrees = "";
 	private int maxSize = 0;
 
 	public void mineFixPatterns(File prevFile, File revFile, File diffEntryFile) throws FileNotFoundException, IOException {
@@ -115,22 +116,25 @@ public class Parser {
 					actionSet.setStartLineNum(startLineNum);
 					actionSet.setEndLineNum(endLineNum);
 
-					// Source Code of patches.
-					String patchSourceCode = getPatchSourceCode(sourceCode, startLineNum, endLineNum, startLineNum2,
-							endLineNum2);
-					if (patchSourceCode != null) {
-						patchesSourceCode += "PATCH###Num\n" + patchSourceCode;
-						patchesSourceCode += actionSet.toString() + "\n";
-
-						/**
+					/*
 					 * Convert the ITree of buggy code to a simple tree.
-						 * TODO: it will be used to compute the similarity. 
+					 * It will be used to compute the similarity. 
 					 */
 					SimplifyTree abstractIdentifier = new SimplifyTree();
 					abstractIdentifier.abstractTree(actionSet);
 					SimpleTree simpleTree = actionSet.getSimpleTree();
-						SimpleTree abstractSimpleTree = actionSet.getAbstractSimpleTree();
 					clearITree(actionSet);
+					if (simpleTree == null) { // Failed to get the simple tree for INS actions.
+						continue;
+					}
+					this.buggyTrees += "BUGGY_TREE###\n" + simpleTree.toString() + "\n";
+					
+					// Source Code of patches.
+					String patchSourceCode = getPatchSourceCode(sourceCode, startLineNum, endLineNum, startLineNum2,
+							endLineNum2);
+					if (patchSourceCode == null) continue;
+					patchesSourceCode += "PATCH###\n" + patchSourceCode;
+					patchesSourceCode += actionSet.toString() + "\n";
 					
 					/**
 					 * Select edit scripts for deep learning. 
@@ -153,7 +157,6 @@ public class Parser {
 			}
 		}
 	}
-	}
 	
 	private String getSemiSourceCodeEditScripts(HierarchicalActionSet actionSet) {
 		// TODO Auto-generated method stub
@@ -364,4 +367,8 @@ public class Parser {
 		return maxSize;
 	}
 
+	public String getBuggyTrees() {
+		return buggyTrees;
+	}
+
 }