Reorganize the SAX event pipeline, this fixes the problem of slow parsing when the namespace is not correct

git-svn-id: https://svn.apache.org/repos/asf/maven/maven-1/plugins/trunk@350057 13f79535-47bb-0310-9956-ffa450edef68

plugin/src/main/org/apache/maven/XPathLocationTracker.java

@@ -21,8 +21,8 @@ import java.util.HashMap;
 import java.util.Map;
 
 import org.xml.sax.Attributes;
-import org.xml.sax.ContentHandler;
 import org.xml.sax.SAXException;
+import org.xml.sax.SAXParseException;
 import org.xml.sax.helpers.XMLFilterImpl;
 
 /**
@@ -31,36 +31,26 @@ import org.xml.sax.helpers.XMLFilterImpl;
  *
  * @author <a href="mailto:ltheussl@apache.org">Lukas Theussl</a>
  */
-
 public class XPathLocationTracker extends XMLFilterImpl
 {
 
     private State state;
     private static final Integer[] ints = new Integer[]
     {
-        new Integer(0),
-        new Integer(1),
-        new Integer(2),
-        new Integer(3),
-        new Integer(4)
+        new Integer( 0 ),
+        new Integer( 1 ),
+        new Integer( 2 ),
+        new Integer( 3 ),
+        new Integer( 4 )
     };
 
-    /**
-     * Constructor: sets the ContentHandler.
-     * @param handler The ContentHandler
-     */
-    public XPathLocationTracker( ContentHandler handler )
-    {
-        setContentHandler(handler);
-    }
-
     /**
      * Overriding ContentHandler.
      * @throws SAXException SAXException
      */
     public void startDocument() throws SAXException
     {
-        state = new State(null);
+        state = new State( null );
         super.startDocument();
     }
 
@@ -82,11 +72,19 @@ public class XPathLocationTracker extends XMLFilterImpl
      * @param atts atts
      * @throws SAXException SAXException
      */
-    public void startElement(String uri, String localName,
-            String qName, Attributes atts) throws SAXException
+    public void startElement( String uri, String localName,
+            String qName, Attributes atts ) throws SAXException
     {
-        state = state.push(qName);
-        super.startElement(uri, localName, qName, atts);
+        state = state.push( qName );
+        try
+        {
+            super.startElement( uri, localName, qName, atts );
+        }
+        catch ( SAXParseException e )
+        {
+            // ignored on purpose: just avoid to throw an exception here
+            // it is thrown by the ErrorHandler in JaxpMsvBean instead
+        }
     }
 
     /**
@@ -96,10 +94,18 @@ public class XPathLocationTracker extends XMLFilterImpl
      * @param qName qName
      * @throws SAXException SAXException
      */
-    public void endElement(String uri, String localName, String qName)
+    public void endElement( String uri, String localName, String qName )
             throws SAXException
     {
-        super.endElement(uri, localName, qName);
+        try
+        {
+            super.endElement( uri, localName, qName );
+        }
+        catch ( SAXParseException e )
+        {
+            // ignored on purpose: just avoid to throw an exception here
+            // it is thrown by the ErrorHandler in JaxpMsvBean instead
+        }
         state = state.pop();
     }
 
@@ -114,17 +120,19 @@ public class XPathLocationTracker extends XMLFilterImpl
         if ( state == null )
         {
             throw new IllegalStateException(
-                "startDocument event is not invoked");
+                "startDocument event is not invoked" );
         }
         return state.getXPath();
     }
 
-    private static Integer getInt(int i)
+    private static Integer getInt( int i )
     {
         if ( i < ints.length )
         {
             return ints[i];
-        } else {
+        }
+        else
+        {
             return new Integer(i);
         }
     }
@@ -148,8 +156,10 @@ public class XPathLocationTracker extends XMLFilterImpl
             currentName = rawName;
             if ( child == null )
             {
-                child = new State(this);
-            } else {
+                child = new State( this );
+            }
+            else
+            {
                 child.reset();
             }
             return child;
@@ -163,14 +173,16 @@ public class XPathLocationTracker extends XMLFilterImpl
 
         private void count( String rawName )
         {
-            Integer i = (Integer) counter.get(rawName);
+            Integer i = (Integer) counter.get( rawName );
             if ( i == null )
             {
-                i = getInt(1);
-            } else {
-                i = getInt(i.intValue() + 1);
+                i = getInt( 1 );
             }
-            counter.put(rawName, i);
+            else
+            {
+                i = getInt( i.intValue() + 1 );
+            }
+            counter.put( rawName, i );
         }
 
         private void reset()
@@ -185,16 +197,18 @@ public class XPathLocationTracker extends XMLFilterImpl
             if ( parent == null ) // root
             {
                 xPath = "/";
-                if ( currentName != null)
+                if ( currentName != null )
                 {
                     xPath += currentName;
                 }
-            } else { // child node
+            }
+            else // child node
+            {
                 xPath = parent.getXPath();
                 if ( currentName != null )
                 {
                     xPath += '/' + currentName;
-                    Integer i = (Integer) counter.get(currentName);
+                    Integer i = (Integer) counter.get( currentName );
                     xPath += '[' + i.toString() + ']';
                 }
             }