Publish

1 files changed, 21 insertions, 0 deletions

diff --git a/container-search/src/main/java/com/yahoo/search/yql/JavaTypeChecker.java b/container-search/src/main/java/com/yahoo/search/yql/JavaTypeChecker.java
new file mode 100644
index 00000000000..bf91474c19b
--- /dev/null
+++ b/container-search/src/main/java/com/yahoo/search/yql/JavaTypeChecker.java
@@ -0,0 +1,21 @@
+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.search.yql;
+
+import com.google.common.base.Preconditions;
+
+class JavaTypeChecker extends OperatorTypeChecker {
+
+    private final Class<?> type;
+
+    public JavaTypeChecker(Operator parent, int idx, Class<?> type) {
+        super(parent, idx);
+        this.type = type;
+    }
+
+    @Override
+    public void check(Object argument) {
+        Preconditions.checkNotNull(argument, "Argument %s of %s must not be null", idx, parent);
+        Preconditions.checkArgument(type.isInstance(argument), "Argument %s of %s must be %s (is: %s).", idx, parent, type.getName(), argument.getClass().getName());
+    }
+
+}