fix to resource handling in PluggableSchemaResolver

org.springframework.beans/src/main/java/org/springframework/beans/factory/xml/PluggableSchemaResolver.java

@@ -17,6 +17,7 @@
 package org.springframework.beans.factory.xml;
 
 import java.io.IOException;
+import java.io.FileNotFoundException;
 import java.util.Map;
 import java.util.Properties;
 import java.util.concurrent.ConcurrentHashMap;
@@ -99,16 +100,17 @@ public class PluggableSchemaResolver implements EntityResolver {
 		this.schemaMappingsLocation = schemaMappingsLocation;
 	}
 
-
 	public InputSource resolveEntity(String publicId, String systemId) throws IOException {
 		if (logger.isTraceEnabled()) {
 			logger.trace("Trying to resolve XML entity with public id [" + publicId +
 					"] and system id [" + systemId + "]");
 		}
+
 		if (systemId != null) {
 			String resourceLocation = getSchemaMappings().get(systemId);
 			if (resourceLocation != null) {
 				Resource resource = new ClassPathResource(resourceLocation, this.classLoader);
+				try {
 					InputSource source = new InputSource(resource.getInputStream());
 					source.setPublicId(publicId);
 					source.setSystemId(systemId);
@@ -117,6 +119,12 @@ public class PluggableSchemaResolver implements EntityResolver {
 					}
 					return source;
 				}
+				catch (FileNotFoundException ex) {
+					if (logger.isDebugEnabled()) {
+						logger.debug("Couldn't find XML schema [" + systemId + "]: " + resource, ex);
+					}
+				}
+			}
 		}
 		return null;
 	}