Add some toString() methods to help with debugging

git-svn-id: http://google-refine.googlecode.com/svn/trunk@1941 7d457c2a-affb-35e4-300a-418c747d4874

main/src/com/google/refine/importers/TreeImportUtilities.java

@@ -35,6 +35,7 @@ package com.google.refine.importers;
 
 import java.io.Serializable;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.Comparator;
 import java.util.HashMap;
@@ -42,6 +43,7 @@ import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 
+import org.apache.commons.lang.StringUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -59,6 +61,10 @@ public abstract class TreeImportUtilities {
     static protected class RecordElementCandidate {
         String[] path;
         int count;
+        
+        public String toString() {
+            return Arrays.toString(path);
+        }
     }
 
 
@@ -88,6 +94,12 @@ public abstract class TreeImportUtilities {
                 nonBlankCount = Math.max(nonBlankCount, g.nonBlankCount);
             }
         }
+        
+        public String toString() {
+            return String.format("name=%s, columns={%s}, subgroups={{%s}}",
+                    name,StringUtils.join(columns.keySet(), ','),
+                    StringUtils.join(subgroups.keySet(),','));
+        }
     }
 
     /**

main/src/com/google/refine/model/Column.java

@@ -153,4 +153,8 @@ public class Column implements Jsonizable {
         
         return column;
     }
+    
+    public String toString() {
+        return _name;
+    }
 }

main/src/com/google/refine/model/ColumnGroup.java

@@ -106,4 +106,8 @@ public class ColumnGroup implements Jsonizable {
     protected void internalInitialize() {
         subgroups = new LinkedList<ColumnGroup>();
     }
+    
+    public String toString() {
+        return String.format("%d:%d:k=%d",startColumnIndex,columnSpan,keyColumnIndex);
+    }
 }