GreaterThan.java

/*
 * Copyright 2015 S. Webber
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.oakgp.function.compare;

import org.oakgp.Arguments;
import org.oakgp.Type;
import org.oakgp.node.FunctionNode;
import org.oakgp.node.Node;

/** Determines if the object represented by the first argument is greater than the object represented by the second. */
public final class GreaterThan extends ComparisonOperator {
   private final LessThan lessThan;

   /** Constructs a function that compares two arguments of the specified type. */
   public GreaterThan(Type type) {
      super(type, false);
      lessThan = LessThan.create(type);
   }

   @Override
   protected boolean evaluate(int diff) {
      return diff > 0;
   }

   @Override
   public Node simplify(Arguments arguments) {
      Node simplifiedVersion = super.simplify(arguments);
      if (simplifiedVersion == null) {
         return new FunctionNode(lessThan, arguments.secondArg(), arguments.firstArg());
      } else {
         return simplifiedVersion;
      }
   }

   @Override
   public String getDisplayName() {
      return ">";
   }
}