1 files changed, 41 insertions, 0 deletions
diff --git a/container-search/src/main/java/com/yahoo/search/yql/StatementOperator.java b/container-search/src/main/java/com/yahoo/search/yql/StatementOperator.java
new file mode 100644
index 00000000000..f25212e1098
--- /dev/null
+++ b/container-search/src/main/java/com/yahoo/search/yql/StatementOperator.java
@@ -0,0 +1,41 @@
+// 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.Predicate;
+import com.google.inject.TypeLiteral;
+
+import java.util.List;
+
+/**
+ * Represents program statements.
+ */
+enum StatementOperator implements Operator {
+
+    PROGRAM(new TypeLiteral<List<OperatorNode<StatementOperator>>>() {
+    }),
+    ARGUMENT(String.class, TypeOperator.class, ExpressionOperator.class),
+    DEFINE_VIEW(String.class, SequenceOperator.class),
+    EXECUTE(SequenceOperator.class, String.class),
+    OUTPUT(String.class),
+    COUNT(String.class);
+
+    private final ArgumentsTypeChecker checker;
+
+    public static Predicate<OperatorNode<? extends Operator>> IS = new Predicate<OperatorNode<? extends Operator>>() {
+        @Override
+        public boolean apply(OperatorNode<? extends Operator> input) {
+            return input.getOperator() instanceof StatementOperator;
+        }
+    };
+
+    private StatementOperator(Object... types) {
+        checker = TypeCheckers.make(this, types);
+    }
+
+
+    @Override
+    public void checkArguments(Object... args) {
+        checker.check(args);
+    }
+
+}