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.ast.expr;
  
  import com.alibaba.druid.sql.SQLUtils;
  import com.alibaba.druid.sql.ast.*;
  import com.alibaba.druid.sql.visitor.SQLASTVisitor;
  
  import java.io.Serializable;
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.List;
  
  public final class SQLInListExpr extends SQLExprImpl implements SQLReplaceable, Serializable {
      private static final long serialVersionUID = 1L;
      private boolean not;
      private SQLExpr expr;
      private List<SQLExpr> targetList = new ArrayList<SQLExpr>();
  
      //for ads query hint
      protected SQLCommentHint hint;
  
      public SQLInListExpr() {
      }
  
      public SQLInListExpr(SQLExpr expr) {
          this.setExpr(expr);
      }
  
      public SQLInListExpr(String expr, String... values) {
          this.setExpr(
                  SQLUtils.toSQLExpr(expr));
  
          for (String value : values) {
              targetList.add(new SQLCharExpr(value));
          }
      }
  
      public SQLInListExpr(SQLExpr expr, boolean not) {
          this.setExpr(expr);
          this.not = not;
      }
  
      public SQLInListExpr clone() {
          SQLInListExpr x = new SQLInListExpr();
          x.not = not;
          if (expr != null) {
              x.setExpr(expr.clone());
          }
          for (SQLExpr e : targetList) {
              SQLExpr e2 = e.clone();
              e2.setParent(x);
              x.targetList.add(e2);
          }
          return x;
      }
  
      public boolean isNot() {
          return this.not;
      }
  
      public void setNot(boolean not) {
          this.not = not;
      }
  
      public SQLExpr getExpr() {
          return this.expr;
      }
  
      public void setExpr(SQLExpr expr) {
          if (expr != null) {
              expr.setParent(this);
          }
  
          this.expr = expr;
      }
  
      public void addTarget(SQLExpr x) {
          x.setParent(this);
          targetList.add(x);
      }
  
      public void addTarget(int index, SQLExpr x) {
          x.setParent(this);
          targetList.add(index, x);
      }
  
      public List<SQLExpr> getTargetList() {
          return this.targetList;
      }
  
      public boolean sortTargetList() {
          if (targetList.size() < 2) {
              return true;
          }
  
          Class<?> firstClass = targetList.get(0).getClass();
          for (int i = 1; i < targetList.size(); i++) {
              if (targetList.get(i).getClass() != firstClass) {
                  return false;
              }
          }
  
          if (!Comparable.class.isAssignableFrom(firstClass)) {
              return false;
          }
  
          Collections.sort((List) targetList);
          return true;
      }
  
      public void setTargetList(List<SQLExpr> targetList) {
          this.targetList = targetList;
      }
  
      protected void accept0(SQLASTVisitor visitor) {
          if (visitor.visit(this)) {
              if (expr != null) {
                  expr.accept(visitor);
              }
  
              if (targetList != null) {
                  for (SQLExpr item : targetList) {
                      if (item != null) {
                          item.accept(visitor);
                      }
                  }
              }
          }
  
          visitor.endVisit(this);
      }
  
      public List<SQLObject> getChildren() {
          List<SQLObject> children = new ArrayList<SQLObject>();
          if (this.expr != null) {
              children.add(this.expr);
          }
          children.addAll(this.targetList);
          return children;
      }
  
      @Override
      public int hashCode() {
          final int prime = 31;
          int result = 1;
          result = prime * result + ((expr == null) ? 0 : expr.hashCode());
          result = prime * result + (not ? 1231 : 1237);
          result = prime * result + ((targetList == null) ? 0 : targetList.hashCode());
          return result;
      }
  
      @Override
      public boolean equals(Object obj) {
          if (this == obj) {
              return true;
          }
          if (obj == null) {
              return false;
          }
          if (getClass() != obj.getClass()) {
              return false;
          }
          SQLInListExpr other = (SQLInListExpr) obj;
          if (expr == null) {
              if (other.expr != null) {
                  return false;
              }
          } else if (!expr.equals(other.expr)) {
              return false;
          }
          if (not != other.not) {
              return false;
          }
          if (targetList == null) {
              if (other.targetList != null) {
                  return false;
              }
          } else if (!targetList.equals(other.targetList)) {
              return false;
          }
          return true;
      }
  
      public SQLDataType computeDataType() {
          return SQLBooleanExpr.DATA_TYPE;
      }
  
      @Override
      public boolean replace(SQLExpr expr, SQLExpr target) {
          if (this.expr == expr) {
              setExpr(target);
              return true;
          }
  
          for (int i = targetList.size() - 1; i >= 0; i--) {
              if (targetList.get(i) == expr) {
                  if (target == null) {
                      targetList.remove(i);
                  } else {
                      targetList.set(i, target);
                      target.setParent(this);
                  }
                  return true;
              }
          }
  
          return false;
      }
  
      public SQLCommentHint getHint() {
          return hint;
      }
  
      public void setHint(SQLCommentHint hint) {
          this.hint = hint;
      }
  }
  