/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You 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.apache.commons.jexl3.parser;
  
  import org.apache.commons.jexl3.JexlArithmetic;
  import org.apache.commons.jexl3.JexlOperator;
  import org.apache.commons.jexl3.internal.ScriptVisitor;
  
  /**
   * Checks if node is an operator node.
   **/
  class OperatorController extends ScriptVisitor {
      static final OperatorController INSTANCE  = new OperatorController();
  
      /**
       * Checks whether an operator is strict for a given arithmetic.
       * @param node the node which should delegate to an operator
       * @return true if node points to a (null-unsafe) operator
       */
      boolean isStrict(final JexlArithmetic arithmetic, final JexlNode node) {
          if (arithmetic.isStrict()) {
              final Object ctl = node.jjtAccept(this, arithmetic);
              if (ctl instanceof JexlOperator) {
                  final JexlOperator operator = (JexlOperator) ctl;
                  return arithmetic.isStrict(operator);
              }
          }
          return false;
      }
  
      @Override
      protected JexlOperator visitNode(final JexlNode node, final Object data) {
          return null;
      }
  
      @Override
      protected JexlOperator visit(final ASTNotNode node, final Object data) {
          return JexlOperator.NOT;
      }
  
      @Override
      protected JexlOperator visit(final ASTAddNode node, final Object data) {
          return JexlOperator.ADD;
      }
  
      @Override
      protected JexlOperator visit(final ASTSetAddNode node, final Object data) {
          return JexlOperator.SELF_ADD;
      }
  
      @Override
      protected JexlOperator visit(final ASTMulNode node, final Object data) {
          return JexlOperator.MULTIPLY;
      }
  
      @Override
      protected JexlOperator visit(final ASTSetMultNode node, final Object data) {
          return JexlOperator.SELF_MULTIPLY;
      }
  
      @Override
      protected JexlOperator visit(final ASTModNode node, final Object data) {
          return JexlOperator.MOD;
      }
  
      @Override
      protected JexlOperator visit(final ASTSetModNode node, final Object data) {
          return JexlOperator.SELF_MOD;
      }
  
      @Override
      protected JexlOperator visit(final ASTDivNode node, final Object data) {
          return JexlOperator.DIVIDE;
      }
  
      @Override
      protected JexlOperator visit(final ASTSetDivNode node, final Object data) {
          return JexlOperator.SELF_DIVIDE;
      }
  
      @Override
      protected JexlOperator visit(final ASTBitwiseAndNode node, final Object data) {
          return JexlOperator.AND;
      }
  
     @Override
     protected JexlOperator visit(final ASTSetAndNode node, final Object data) {
         return JexlOperator.SELF_AND;
     }
 
     @Override
     protected JexlOperator visit(final ASTBitwiseOrNode node, final Object data) {
         return JexlOperator.OR;
     }
 
     @Override
     protected JexlOperator visit(final ASTSetOrNode node, final Object data) {
         return JexlOperator.SELF_OR;
     }
 
     @Override
     protected JexlOperator visit(final ASTBitwiseXorNode node, final Object data) {
         return JexlOperator.XOR;
     }
 
     @Override
     protected JexlOperator visit(final ASTSetXorNode node, final Object data) {
         return JexlOperator.SELF_OR;
     }
 
     @Override
     protected JexlOperator visit(final ASTBitwiseComplNode node, final Object data) {
         return JexlOperator.COMPLEMENT;
     }
 
     @Override
     protected JexlOperator visit(final ASTSubNode node, final Object data) {
         return JexlOperator.SUBTRACT;
     }
 
     @Override
     protected JexlOperator visit(final ASTSetSubNode node, final Object data) {
         return JexlOperator.SELF_SUBTRACT;
     }
 
     @Override
     protected JexlOperator visit(final ASTEQNode node, final Object data) {
         return JexlOperator.EQ;
     }
 
     @Override
     protected JexlOperator visit(final ASTNENode node, final Object data) {
         return JexlOperator.EQ;
     }
 
     @Override
     protected JexlOperator visit(final ASTGTNode node, final Object data) {
         return JexlOperator.GT;
     }
 
     @Override
     protected JexlOperator visit(final ASTGENode node, final Object data) {
         return JexlOperator.GTE;
     }
 
     @Override
     protected JexlOperator visit(final ASTLTNode node, final Object data) {
         return JexlOperator.LT;
     }
 
     @Override
     protected JexlOperator visit(final ASTLENode node, final Object data) {
         return JexlOperator.LTE;
     }
 
     @Override
     protected JexlOperator visit(final ASTSWNode node, final Object data) {
         return JexlOperator.STARTSWITH;
     }
 
     @Override
     protected JexlOperator visit(final ASTNSWNode node, final Object data) {
         return JexlOperator.STARTSWITH;
     }
 
     @Override
     protected JexlOperator visit(final ASTEWNode node, final Object data) {
         return JexlOperator.ENDSWITH;
     }
 
     @Override
     protected JexlOperator visit(final ASTNEWNode node, final Object data) {
         return JexlOperator.ENDSWITH;
     }
 
     @Override
     protected JexlOperator visit(final ASTERNode node, final Object data) {
         return JexlOperator.CONTAINS;
     }
 
     @Override
     protected JexlOperator visit(final ASTNRNode node, final Object data) {
         return JexlOperator.CONTAINS;
     }
 }