--- a/src/java/de/intevation/mxd/reader/UniqueValueRendererReader.java	Wed Jun 15 16:48:42 2011 +0200
+++ b/src/java/de/intevation/mxd/reader/UniqueValueRendererReader.java	Wed Jun 15 18:37:27 2011 +0200
@@ -7,6 +7,7 @@
 import com.esri.arcgis.carto.UniqueValueRenderer;
 
 import org.w3c.dom.Element;
+import java.io.IOException;
 
 import de.intevation.mxd.utils.MapToXMLUtils;
 
@@ -66,53 +67,68 @@
      *
      * @return The parent XML node.
      */
-    public Element read()
-    throws Exception {
+    public Element read() {
         logger.debug("read()");
-        for(int i = 0; i < renderer.getClassCount() - 1; i++) {
+        int count = 0;
+        try {
+            count = renderer.getClassCount();
+        }
+        catch(IOException ioe) {
+            logger.error("Could not read class count. Stopped reading renderer.");
+            return layer;
+        }
+        for(int i = 0; i < count - 1; i++) {
             Element rendererElement = util.addRenderer(layer);
 
-            String value = renderer.getValue(i);
-            rendererElement.setAttribute("name", renderer.esri_getClass(i));
-            rendererElement.setAttribute("description",
-            renderer.getDescription(value));
-            rendererElement.setAttribute("value", value);
-            rendererElement.setAttribute("label", renderer.getLabel(value));
-            rendererElement.setAttribute(
-                "field_count",
-                String.valueOf(renderer.getFieldCount()));
-            for(int j = 0; j < renderer.getFieldCount(); j++) {
+            try {
+                String value = renderer.getValue(i);
+                rendererElement.setAttribute("name", renderer.esri_getClass(i));
+                rendererElement.setAttribute("description",
+                renderer.getDescription(value));
+                rendererElement.setAttribute("value", value);
+                rendererElement.setAttribute("label", renderer.getLabel(value));
                 rendererElement.setAttribute(
-                    "expression_field_" + j,
-                    renderer.getField(j));
-            }
-            rendererElement.setAttribute("expression_operator", "=");
+                    "field_count",
+                    String.valueOf(renderer.getFieldCount()));
+                for(int j = 0; j < renderer.getFieldCount(); j++) {
+                    rendererElement.setAttribute(
+                        "expression_field_" + j,
+                        renderer.getField(j));
+                }
+                rendererElement.setAttribute("expression_operator", "=");
 
-            ISymbol sym = renderer.getSymbol(value);
-            MarkerSymbolReader markerReader = new MarkerSymbolReader();
-            LineSymbolReader lineReader = new LineSymbolReader();
-            FillSymbolReader fillReader = new FillSymbolReader();
-            if(markerReader.canRead(sym)) {
-                markerReader.setSymbol(sym);
-                markerReader.setUtil(util);
-                markerReader.setParent(rendererElement);
-                markerReader.read();
+                ISymbol sym = renderer.getSymbol(value);
+                MarkerSymbolReader markerReader = new MarkerSymbolReader();
+                LineSymbolReader lineReader = new LineSymbolReader();
+                FillSymbolReader fillReader = new FillSymbolReader();
+                if(markerReader.canRead(sym)) {
+                    markerReader.setSymbol(sym);
+                    markerReader.setUtil(util);
+                    markerReader.setParent(rendererElement);
+                    markerReader.read();
+                }
+                else if(lineReader.canRead(sym)) {
+                    lineReader.setSymbol(sym);
+                    lineReader.setUtil(util);
+                    lineReader.setParent(rendererElement);
+                    lineReader.read();
+                }
+                else if(fillReader.canRead(sym)) {
+                    fillReader.setSymbol(sym);
+                    fillReader.setUtil(util);
+                    fillReader.setParent(rendererElement);
+                    fillReader.read();
+                }
+                else {
+                    logger.debug("Not a known symbol type: " +
+                                 sym.getClass().toString());
+                }
             }
-            else if(lineReader.canRead(sym)) {
-                lineReader.setSymbol(sym);
-                lineReader.setUtil(util);
-                lineReader.setParent(rendererElement);
-                lineReader.read();
-            }
-            else if(fillReader.canRead(sym)) {
-                fillReader.setSymbol(sym);
-                fillReader.setUtil(util);
-                fillReader.setParent(rendererElement);
-                fillReader.read();
-            }
-            else {
-                logger.debug("Not a known symbol type: " +
-                             sym.getClass().toString());
+            catch(Exception e) {
+                logger.error(
+                    "Could not read unique value data." +
+                    e.toString());
+                return layer;
             }
         }
         return layer;