Fix JVM segv on null pointers

[yaz4j-moved-to-github.git] / src / main / java / org / yaz4j / Query.java

diff --git a/src/main/java/org/yaz4j/Query.java b/src/main/java/org/yaz4j/Query.java
index 03a5f09..cf66a9d 100644 (file)
--- a/src/main/java/org/yaz4j/Query.java
+++ b/src/main/java/org/yaz4j/Query.java
@@ -18,7 +18,9 @@ public abstract class Query {
   SWIGTYPE_p_ZOOM_query_p query;
   private boolean disposed = false;
   
-  protected Query() {
+  protected Query(String queryString) {
+    if (queryString == null)
+      throw new NullPointerException("query string cannot be null");
     query = yaz4jlib.ZOOM_query_create();
   }