From 72cd9d3ef576c3bb9037b1692781a1b46297e998 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Sun, 10 Jan 2016 16:21:35 +0000
Subject: Move operation static methods into their own class

---
 .../java/org/zwobble/couscous/ast/Operations.java  | 79 ++++++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 src/main/java/org/zwobble/couscous/ast/Operations.java

(limited to 'src/main/java/org/zwobble/couscous/ast/Operations.java')

diff --git a/src/main/java/org/zwobble/couscous/ast/Operations.java b/src/main/java/org/zwobble/couscous/ast/Operations.java
new file mode 100644
index 0000000..5691891
--- /dev/null
+++ b/src/main/java/org/zwobble/couscous/ast/Operations.java
@@ -0,0 +1,79 @@
+package org.zwobble.couscous.ast;
+
+import org.zwobble.couscous.values.BooleanValue;
+import org.zwobble.couscous.values.IntegerValue;
+
+import java.util.Collections;
+
+import static org.zwobble.couscous.ast.MethodCallNode.methodCall;
+import static org.zwobble.couscous.util.ExtraLists.list;
+
+public class Operations {
+    public static ExpressionNode not(ExpressionNode value) {
+        if (value.getType().equals(BooleanValue.REF)) {
+            return methodCall(value, "negate", Collections.emptyList(), BooleanValue.REF);
+        } else {
+            throw new IllegalArgumentException("Can only negate booleans");
+        }
+    }
+
+    public static ExpressionNode booleanAnd(ExpressionNode left, ExpressionNode right) {
+        return booleanOperation(Operator.BOOLEAN_AND.getMethodName(), left, right);
+    }
+
+    public static ExpressionNode booleanOr(ExpressionNode left, ExpressionNode right) {
+        return booleanOperation(Operator.BOOLEAN_OR.getMethodName(), left, right);
+    }
+
+    public static ExpressionNode integerAdd(ExpressionNode left, ExpressionNode right) {
+        return integerOperation(Operator.ADD.getMethodName(), left, right);
+    }
+
+    public static ExpressionNode integerSubtract(ExpressionNode left, ExpressionNode right) {
+        return integerOperation(Operator.SUBTRACT.getMethodName(), left, right);
+    }
+
+    public static ExpressionNode integerMultiply(ExpressionNode left, ExpressionNode right) {
+        return integerOperation(Operator.MULTIPLY.getMethodName(), left, right);
+    }
+
+    public static ExpressionNode integerDivide(ExpressionNode left, ExpressionNode right) {
+        return integerOperation(Operator.DIVIDE.getMethodName(), left, right);
+    }
+
+    public static ExpressionNode integerMod(ExpressionNode left, ExpressionNode right) {
+        return integerOperation(Operator.MOD.getMethodName(), left, right);
+    }
+
+    public static MethodCallNode integerOperation(String methodName, ExpressionNode left, ExpressionNode right) {
+        return methodCall(left, methodName, list(right), IntegerValue.REF);
+    }
+
+    public static ExpressionNode equal(ExpressionNode left, ExpressionNode right) {
+        return booleanOperation(Operator.EQUALS.getMethodName(), left, right);
+    }
+
+    public static ExpressionNode notEqual(ExpressionNode left, ExpressionNode right) {
+        return booleanOperation(Operator.NOT_EQUALS.getMethodName(), left, right);
+    }
+
+    public static ExpressionNode greaterThan(ExpressionNode left, ExpressionNode right) {
+        return booleanOperation(Operator.GREATER_THAN.getMethodName(), left, right);
+    }
+
+    public static ExpressionNode greaterThanOrEqual(ExpressionNode left, ExpressionNode right) {
+        return booleanOperation(Operator.GREATER_THAN_OR_EQUAL.getMethodName(), left, right);
+    }
+
+    public static ExpressionNode lessThan(ExpressionNode left, ExpressionNode right) {
+        return booleanOperation(Operator.LESS_THAN.getMethodName(), left, right);
+    }
+
+    public static ExpressionNode lessThanOrEqual(ExpressionNode left, ExpressionNode right) {
+        return booleanOperation(Operator.LESS_THAN_OR_EQUAL.getMethodName(), left, right);
+    }
+
+    private static ExpressionNode booleanOperation(String methodName, ExpressionNode left, ExpressionNode right) {
+        return methodCall(left, methodName, list(right), BooleanValue.REF);
+    }
+}
-- 
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