Fixed bug with multiple properties.

$.store.book[0]['title', 'author']

json-path/src/main/java/com/jayway/jsonpath/internal/spi/compiler/EvaluationContextImpl.java

@@ -82,4 +82,5 @@ class EvaluationContextImpl implements EvaluationContext {
     public List<String> getPathList() {
         return pathResult;
     }
+
 }

json-path/src/main/java/com/jayway/jsonpath/internal/spi/compiler/PathCompiler.java

@@ -42,7 +42,8 @@ public class PathCompiler {
             path = "$." + path;
         }
 
-        Path p = cache.get(path + filterList.toString());
+        String cacheKey = path + filterList.toString();
+        Path p = cache.get(cacheKey);
         if(p != null){
             return p;
         }
@@ -110,7 +111,7 @@ public class PathCompiler {
 
         Path pa = new CompiledPath(root);
 
-        cache.put(path, pa);
+        cache.put(cacheKey, pa);
 
         return pa;
     }
@@ -344,6 +345,7 @@ public class PathCompiler {
             StringBuilder buffer = new StringBuilder();
 
             boolean propertyIsOpen = false;
+            boolean propertyDone = false;
 
             while (current != ']') {
                 switch (current) {
@@ -351,12 +353,17 @@ public class PathCompiler {
                         if (propertyIsOpen) {
                             property = buffer.toString();
                             propertyIsOpen = false;
+                            propertyDone = true;
                         } else {
                             propertyIsOpen = true;
                         }
                         break;
                     default:
                         if (propertyIsOpen) {
+                            if(propertyDone){
+                                //Don't understand how to create a "Normalized path expressions" for this type of query
+                                throw new InvalidPathException("Only single properties are supported.");
+                            }
                             buffer.append(current);
                         }
                         break;