WW-4360 Fixes potential NullPointerExceptions

xwork-core/src/main/java/com/opensymphony/xwork2/config/providers/XmlConfigurationProvider.java

@@ -37,11 +37,13 @@ import com.opensymphony.xwork2.util.location.Location;
 import com.opensymphony.xwork2.util.location.LocationUtils;
 import com.opensymphony.xwork2.util.logging.Logger;
 import com.opensymphony.xwork2.util.logging.LoggerFactory;
+
 import org.w3c.dom.Document;
 import org.w3c.dom.Element;
 import org.w3c.dom.Node;
 import org.w3c.dom.NodeList;
 import org.xml.sax.InputSource;
+import org.apache.commons.lang3.ObjectUtils;
 import org.apache.commons.lang3.StringUtils;
 
 import java.io.IOException;
@@ -426,7 +428,7 @@ public class XmlConfigurationProvider implements ConfigurationProvider {
         } else {
             if (!verifyAction(className, name, location)) {
                 if (LOG.isErrorEnabled())
-                    LOG.error("Unable to verify action [#0] with class [#1], from [#2]", name, className, location.toString());
+                    LOG.error("Unable to verify action [#0] with class [#1], from [#2]", name, className, location);
                 return;
             }
         }

xwork-core/src/main/java/com/opensymphony/xwork2/conversion/impl/NumberConverter.java

@@ -95,6 +95,8 @@ public class NumberConverter extends DefaultTypeConverter {
                 bigValue = new BigInteger(stringValue);
                 lowerBound = BigInteger.valueOf(Long.MIN_VALUE);
                 upperBound = BigInteger.valueOf(Long.MAX_VALUE);
+            } else {
+                throw new IllegalArgumentException("Unexpected numeric type: " + toType.getName());
             }
         } catch (NumberFormatException e) {
             //shoult it fail here? BigInteger doesnt seem to be so nice parsing numbers as NumberFormat

xwork-core/src/main/java/com/opensymphony/xwork2/util/NamedVariablePatternMatcher.java

@@ -80,7 +80,10 @@ public class NamedVariablePatternMatcher implements PatternMatcher<NamedVariable
                 char c = data.charAt(x);
                 switch (c) {
                     case '{' :  varName = new StringBuilder(); break;
-                    case '}' :  varNames.add(varName.toString());
+                    case '}' :  if (varName == null) {
+                                    throw new IllegalArgumentException("Mismatched braces in pattern");
+                                }
+                                varNames.add(varName.toString());
                                 regex.append("([^/]+)");
                                 varName = null;
                                 break;

xwork-core/src/main/java/com/opensymphony/xwork2/util/finder/ResourceFinder.java

@@ -1000,9 +1000,8 @@ public class ResourceFinder {
     private Properties loadProperties(URL resource) throws IOException {
         InputStream in = resource.openStream();
 
-        BufferedInputStream reader = null;
+        BufferedInputStream reader = new BufferedInputStream(in);
         try {
-            reader = new BufferedInputStream(in);
             Properties properties = new Properties();
             properties.load(reader);
 
@@ -1018,12 +1017,10 @@ public class ResourceFinder {
 
     private String readContents(URL resource) throws IOException {
         InputStream in = resource.openStream();
-        BufferedInputStream reader = null;
         StringBuilder sb = new StringBuilder();
 
+        BufferedInputStream reader = new BufferedInputStream(in);
         try {
-            reader = new BufferedInputStream(in);
-
             int b = reader.read();
             while (b != -1) {
                 sb.append((char) b);

xwork-core/src/main/java/com/opensymphony/xwork2/util/location/LocationUtils.java

@@ -263,14 +263,14 @@ public class LocationUtils {
                     newFinders.remove(ref);
                     finders = newFinders;
                 }
-            }
-            
-            Location result = finder.getLocation(obj, description);
-            if (result != null) {
-                return result;
+            } else {
+                Location result = finder.getLocation(obj, description);
+                if (result != null) {
+                    return result;
+                }
             }
         }
-        
+
         if (obj instanceof Throwable) {
         		Throwable t = (Throwable) obj;
         		StackTraceElement[] stack = t.getStackTrace();

xwork-core/src/test/java/com/opensymphony/xwork2/util/NamedVariablePatternMatcherTest.java

@@ -15,16 +15,23 @@
  */
 package com.opensymphony.xwork2.util;
 
-import com.opensymphony.xwork2.util.NamedVariablePatternMatcher.CompiledPattern;
-import junit.framework.TestCase;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
 
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.regex.Pattern;
 
-public class NamedVariablePatternMatcherTest extends TestCase {
+import org.junit.Test;
 
+import com.opensymphony.xwork2.util.NamedVariablePatternMatcher.CompiledPattern;
+
+public class NamedVariablePatternMatcherTest {
+
+    @Test
     public void testCompile() {
         NamedVariablePatternMatcher matcher = new NamedVariablePatternMatcher();
 
@@ -46,6 +53,14 @@ public class NamedVariablePatternMatcherTest extends TestCase {
         assertFalse(pattern.getPattern().matcher("foo/star/jie").matches());
     }
 
+    @Test(expected = IllegalArgumentException.class)
+    public void testCompileWithMismatchedBracketsParses() {
+        NamedVariablePatternMatcher matcher = new NamedVariablePatternMatcher();
+
+        matcher.compilePattern("}");
+    }
+
+    @Test
     public void testMatch() {
         NamedVariablePatternMatcher matcher = new NamedVariablePatternMatcher();
 
@@ -56,6 +71,7 @@ public class NamedVariablePatternMatcherTest extends TestCase {
         assertEquals("baz", vars.get("bar"));
     }
 
+    @Test
     public void testIsLiteral() {
         NamedVariablePatternMatcher matcher = new NamedVariablePatternMatcher();