content: /*
   * Copyright 1999-2012 Alibaba Group.
   *  
   * 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.
   */
  /**
   * (created at 2011-1-23)
   */
  package com.alibaba.cobar.parser.ast.expression.primary.function.cast;
  
  import java.util.List;
  
  import com.alibaba.cobar.parser.ast.expression.Expression;
  import com.alibaba.cobar.parser.ast.expression.primary.function.FunctionExpression;
  import com.alibaba.cobar.parser.visitor.SQLASTVisitor;
  
  /**
   * @author <a href="mailto:shuo.qius@alibaba-inc.com">QIU Shuo</a>
   */
  public class Cast extends FunctionExpression {
      private final String typeName;
      private final Expression typeInfo1;
      private final Expression typeInfo2;
  
      /**
       * @param expr never null
       */
      public Cast(Expression expr, String typeName, Expression typeInfo1, Expression typeInfo2) {
          super("CAST", wrapList(expr));
          if (null == typeName) {
              throw new IllegalArgumentException("typeName is null");
          }
          this.typeName = typeName;
          this.typeInfo1 = typeInfo1;
          this.typeInfo2 = typeInfo2;
      }
  
      /**
       * @return never null
       */
      public Expression getExpr() {
          return getArguments().get(0);
      }
  
      /**
       * @return never null
       */
      public String getTypeName() {
          return typeName;
      }
  
      public Expression getTypeInfo1() {
          return typeInfo1;
      }
  
      public Expression getTypeInfo2() {
          return typeInfo2;
      }
  
      @Override
      public FunctionExpression constructFunction(List<Expression> arguments) {
          throw new UnsupportedOperationException("function of char has special arguments");
      }
  
      @Override
      public void accept(SQLASTVisitor visitor) {
          visitor.visit(this);
      }
  }
  