From 4e6e946dd7860f0e6291c3dd96ffd699c174c983 Mon Sep 17 00:00:00 2001
From: "yihua.huang" <code4crafter@gmail.com>
Date: Wed, 13 Aug 2014 10:02:16 +0800
Subject: [PATCH] more friendly exception message in PlainText #144

---
 .../java/us/codecraft/webmagic/selector/PlainText.java | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/webmagic-core/src/main/java/us/codecraft/webmagic/selector/PlainText.java b/webmagic-core/src/main/java/us/codecraft/webmagic/selector/PlainText.java
index 557763b1..c78f6791 100644
--- a/webmagic-core/src/main/java/us/codecraft/webmagic/selector/PlainText.java
+++ b/webmagic-core/src/main/java/us/codecraft/webmagic/selector/PlainText.java
@@ -29,27 +29,27 @@ public class PlainText extends AbstractSelectable {
 
     @Override
     public Selectable xpath(String xpath) {
-        throw new UnsupportedOperationException();
+        throw new UnsupportedOperationException("XPath can not apply to plain text. Please check whether you use a previous xpath with attribute select (/@href etc).");
     }
 
     @Override
     public Selectable $(String selector) {
-        throw new UnsupportedOperationException();
+		throw new UnsupportedOperationException("$ can not apply to plain text. Please check whether you use a previous xpath with attribute select (/@href etc).");
     }
 
     @Override
     public Selectable $(String selector, String attrName) {
-        throw new UnsupportedOperationException();
+		throw new UnsupportedOperationException("$ can not apply to plain text. Please check whether you use a previous xpath with attribute select (/@href etc).");
     }
 
     @Override
     public Selectable smartContent() {
-        throw new UnsupportedOperationException();
+		throw new UnsupportedOperationException("Smart content can not apply to plain text. Please check whether you use a previous xpath with attribute select (/@href etc).");
     }
 
     @Override
     public Selectable links() {
-        throw new UnsupportedOperationException();
+		throw new UnsupportedOperationException("Links can not apply to plain text. Please check whether you use a previous xpath with attribute select (/@href etc).");
     }
 
     @Override