--- old/src/java.xml/share/classes/com/sun/org/apache/xml/internal/serializer/SerializerBase.java	2016-12-13 23:24:10.829015000 +0800
+++ new/src/java.xml/share/classes/com/sun/org/apache/xml/internal/serializer/SerializerBase.java	2016-12-13 23:24:10.711015000 +0800
@@ -93,9 +93,11 @@
     protected AttributesImplSerializer m_attributes = new AttributesImplSerializer();
 
     /**
-     * Tells if we're in an EntityRef event.
+     * Tells if we're in an EntityRef event, true if it's greater than 0. Use
+     * integer type to handle nested entity reference, increase m_inEntityRef in
+     * startEntity, decrease m_inEntityRef in endEntity.
      */
-    protected boolean m_inEntityRef = false;
+    protected int m_inEntityRef = 0;
 
     /** This flag is set while receiving events from the external DTD */
     protected boolean m_inExternalDTD = false;
@@ -144,7 +146,7 @@
     /**
      * Amount to indent.
      */
-    protected int m_indentAmount = 0;
+    protected int m_indentAmount = 4;
 
     /**
      * Tells the XML version, for writing out to the XML decl.
@@ -444,13 +446,25 @@
     public void endEntity(String name) throws org.xml.sax.SAXException {
         if (name.equals("[dtd]"))
             m_inExternalDTD = false;
-        m_inEntityRef = false;
+
+        if (!m_inExternalDTD)
+            m_inEntityRef--;
 
         if (m_tracer != null)
             this.fireEndEntity(name);
     }
 
     /**
+     * This method checks if current node is in entity reference.
+     *
+     * @return True if current node is in entity reference.
+     */
+    protected boolean isInEntityRef()
+    {
+        return m_inEntityRef > 0;
+    }
+
+    /**
      * Flush and close the underlying java.io.Writer. This method applies to
      * ToStream serializers, not ToSAXHandler serializers.
      * @see ToStream
@@ -1139,8 +1153,8 @@
         this.m_doctypePublic = null;
         this.m_doctypeSystem = null;
         this.m_doIndent = false;
-        this.m_indentAmount = 0;
-        this.m_inEntityRef = false;
+        this.m_indentAmount = 4;
+        this.m_inEntityRef = 0;
         this.m_inExternalDTD = false;
         this.m_mediatype = null;
         this.m_needToCallStartDocument = true;