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1 files changed, 84 insertions, 0 deletions

diff --git a/container-search/src/main/java/com/yahoo/search/yql/ExpressionOperator.java b/container-search/src/main/java/com/yahoo/search/yql/ExpressionOperator.java
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index 00000000000..e9fe52d33e7
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+++ b/container-search/src/main/java/com/yahoo/search/yql/ExpressionOperator.java
@@ -0,0 +1,84 @@
+// 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;
+
+/**
+ * Operators on expressions.
+ */
+enum ExpressionOperator implements Operator {
+
+    AND(TypeCheckers.EXPRS),
+    OR(TypeCheckers.EXPRS),
+    EQ(ExpressionOperator.class, ExpressionOperator.class),
+    NEQ(ExpressionOperator.class, ExpressionOperator.class),
+    LT(ExpressionOperator.class, ExpressionOperator.class),
+    GT(ExpressionOperator.class, ExpressionOperator.class),
+    LTEQ(ExpressionOperator.class, ExpressionOperator.class),
+    GTEQ(ExpressionOperator.class, ExpressionOperator.class),
+
+    IN(ExpressionOperator.class, ExpressionOperator.class),
+    IN_QUERY(ExpressionOperator.class, SequenceOperator.class),
+    NOT_IN(ExpressionOperator.class, ExpressionOperator.class),
+    NOT_IN_QUERY(ExpressionOperator.class, SequenceOperator.class),
+
+    LIKE(ExpressionOperator.class, ExpressionOperator.class),
+    NOT_LIKE(ExpressionOperator.class, ExpressionOperator.class),
+
+    IS_NULL(ExpressionOperator.class),
+    IS_NOT_NULL(ExpressionOperator.class),
+    MATCHES(ExpressionOperator.class, ExpressionOperator.class),
+    NOT_MATCHES(ExpressionOperator.class, ExpressionOperator.class),
+    CONTAINS(ExpressionOperator.class, ExpressionOperator.class),
+
+    ADD(ExpressionOperator.class, ExpressionOperator.class),
+    SUB(ExpressionOperator.class, ExpressionOperator.class),
+    MULT(ExpressionOperator.class, ExpressionOperator.class),
+    DIV(ExpressionOperator.class, ExpressionOperator.class),
+    MOD(ExpressionOperator.class, ExpressionOperator.class),
+
+    NEGATE(ExpressionOperator.class),
+    NOT(ExpressionOperator.class),
+
+    MAP(TypeCheckers.LIST_OF_STRING, TypeCheckers.EXPRS),
+
+    ARRAY(TypeCheckers.EXPRS),
+
+    INDEX(ExpressionOperator.class, ExpressionOperator.class),
+    PROPREF(ExpressionOperator.class, String.class),
+
+    CALL(TypeCheckers.LIST_OF_STRING, TypeCheckers.EXPRS),
+
+    VARREF(String.class),
+
+    LITERAL(TypeCheckers.LITERAL_TYPES),
+
+    READ_RECORD(String.class),
+    READ_FIELD(String.class, String.class),
+    READ_MODULE(TypeCheckers.LIST_OF_STRING),
+
+    VESPA_GROUPING(String.class),
+
+    NULL();
+
+    private final ArgumentsTypeChecker checker;
+
+
+    private ExpressionOperator(Object... types) {
+        checker = TypeCheckers.make(this, types);
+    }
+
+
+    @Override
+    public void checkArguments(Object... args) {
+        checker.check(args);
+    }
+
+    public static Predicate<OperatorNode<? extends Operator>> IS = new Predicate<OperatorNode<? extends Operator>>() {
+        @Override
+        public boolean apply(OperatorNode<? extends Operator> input) {
+            return input.getOperator() instanceof ExpressionOperator;
+        }
+    };
+
+}