content: /*
   * Copyright 1999-2017 Alibaba Group Holding Ltd.
   *
   * 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 com.alibaba.druid.sql.dialect.sqlserver.visitor;
  
  import com.alibaba.druid.sql.ast.expr.*;
  import com.alibaba.druid.sql.visitor.SQLEvalVisitor;
  import com.alibaba.druid.sql.visitor.SQLEvalVisitorUtils;
  import com.alibaba.druid.sql.visitor.functions.Function;
  
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  public class SQLServerEvalVisitor extends SQLServerASTVisitorAdapter implements SQLEvalVisitor {
      private Map<String, Function> functions = new HashMap<String, Function>();
      private List<Object> parameters = new ArrayList<Object>();
  
      private int variantIndex = -1;
  
      private boolean markVariantIndex = true;
  
      public SQLServerEvalVisitor() {
          this(new ArrayList<Object>(1));
      }
  
      public SQLServerEvalVisitor(List<Object> parameters) {
          this.parameters = parameters;
      }
  
      public List<Object> getParameters() {
          return parameters;
      }
  
      public void setParameters(List<Object> parameters) {
          this.parameters = parameters;
      }
  
      public boolean visit(SQLCharExpr x) {
          return SQLEvalVisitorUtils.visit(this, x);
      }
  
      public int incrementAndGetVariantIndex() {
          return ++variantIndex;
      }
  
      public int getVariantIndex() {
          return variantIndex;
      }
  
      public boolean visit(SQLVariantRefExpr x) {
          return SQLEvalVisitorUtils.visit(this, x);
      }
  
      public boolean visit(SQLBinaryOpExpr x) {
          return SQLEvalVisitorUtils.visit(this, x);
      }
  
      public boolean visit(SQLUnaryExpr x) {
          return SQLEvalVisitorUtils.visit(this, x);
      }
  
      public boolean visit(SQLIntegerExpr x) {
          return SQLEvalVisitorUtils.visit(this, x);
      }
  
      public boolean visit(SQLNumberExpr x) {
          return SQLEvalVisitorUtils.visit(this, x);
      }
  
      @Override
      public boolean visit(SQLCaseExpr x) {
          return SQLEvalVisitorUtils.visit(this, x);
      }
  
      @Override
      public boolean visit(SQLInListExpr x) {
          return SQLEvalVisitorUtils.visit(this, x);
      }
  
      @Override
      public boolean visit(SQLNullExpr x) {
          return SQLEvalVisitorUtils.visit(this, x);
      }
  
      @Override
      public boolean visit(SQLMethodInvokeExpr x) {
          return SQLEvalVisitorUtils.visit(this, x);
      }
  
      @Override
      public boolean visit(SQLQueryExpr x) {
          return SQLEvalVisitorUtils.visit(this, x);
      }
  
      public boolean isMarkVariantIndex() {
          return markVariantIndex;
      }
  
      public void setMarkVariantIndex(boolean markVariantIndex) {
          this.markVariantIndex = markVariantIndex;
      }
  
      @Override
      public Function getFunction(String funcName) {
          return functions.get(funcName);
      }
  
      @Override
      public void registerFunction(String funcName, Function function) {
          functions.put(funcName, function);
      }
  
      @Override
      public void unregisterFunction(String funcName) {
          functions.remove(funcName);
      }
  
      public boolean visit(SQLIdentifierExpr x) {
          return SQLEvalVisitorUtils.visit(this, x);
      }
  }
  