handy toString methods for the new Sort classes. feel free to adjust the aesthetics

git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@150278 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/lucene/search/Sort.java

@@ -202,4 +202,16 @@ implements Serializable {
 	public void setSort (SortField[] fields) {
 		this.fields = fields;
 	}
+
+  public String toString() {
+    StringBuffer buffer = new StringBuffer();
+
+    for (int i = 0; i < fields.length; i++) {
+      buffer.append(fields[i].toString());
+      if ((i +1) < fields.length)
+        buffer.append(',');
+    }
+
+    return buffer.toString();
+  }
 }

src/java/org/apache/lucene/search/SortField.java

@@ -133,4 +133,22 @@ implements Serializable {
   public boolean getReverse() {
     return reverse;
   }
+
+  public String toString() {
+    StringBuffer buffer = new StringBuffer();
+    switch (type) {
+      case SCORE: buffer.append("<score>");
+                  break;
+
+      case DOC: buffer.append("<doc>");
+                break;
+
+      default: buffer.append("\"" + field + "\"");
+               break;
+    }
+    
+    buffer.append(reverse ? " DESC" : " ASC");
+
+    return buffer.toString();
+  }
 }