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.ast.*;
  import com.alibaba.druid.sql.visitor.SQLASTVisitor;
  
  import java.io.Serializable;
  import java.util.ArrayList;
  import java.util.List;
  
  public class SQLCaseStatement extends SQLStatementImpl implements Serializable {
      private final List<Item> items = new ArrayList<Item>();
      private SQLExpr valueExpr;
      private List<SQLStatement> elseStatements = new ArrayList<SQLStatement>();
  
      public SQLCaseStatement() {
      }
  
      public SQLExpr getValueExpr() {
          return this.valueExpr;
      }
  
      public void setValueExpr(SQLExpr valueExpr) {
          if (valueExpr != null) {
              valueExpr.setParent(this);
          }
          this.valueExpr = valueExpr;
      }
  
      public List<SQLStatement> getElseStatements() {
          return elseStatements;
      }
  
      public List<Item> getItems() {
          return this.items;
      }
  
      public void addItem(Item item) {
          if (item != null) {
              item.setParent(this);
              this.items.add(item);
          }
      }
  
      protected void accept0(SQLASTVisitor visitor) {
          if (visitor.visit(this)) {
              if (this.valueExpr != null) {
                  this.valueExpr.accept(visitor);
              }
  
              if (this.items != null) {
                  for (Item item : this.items) {
                      if (item != null) {
                          item.accept(visitor);
                      }
                  }
              }
  
              if (this.elseStatements != null) {
                  for (SQLStatement item : this.elseStatements) {
                      if (item != null) {
                          item.accept(visitor);
                      }
                  }
              }
          }
          visitor.endVisit(this);
      }
  
      @Override
      public List<SQLObject> getChildren() {
          List<SQLObject> children = new ArrayList<SQLObject>();
          if (valueExpr != null) {
              children.add(valueExpr);
          }
          children.addAll(this.items);
          children.addAll(this.elseStatements);
          return children;
      }
  
      public static class Item extends SQLObjectImpl implements Serializable {
          private static final long serialVersionUID = 1L;
          private SQLExpr conditionExpr;
          private SQLStatement statement;
  
          public Item() {
          }
  
          public Item(SQLExpr conditionExpr, SQLStatement statement) {
              setConditionExpr(conditionExpr);
              setStatement(statement);
          }
  
          public SQLExpr getConditionExpr() {
              return this.conditionExpr;
          }
  
          public void setConditionExpr(SQLExpr conditionExpr) {
              if (conditionExpr != null) {
                  conditionExpr.setParent(this);
              }
              this.conditionExpr = conditionExpr;
          }
  
          public SQLStatement getStatement() {
              return this.statement;
          }
  
          public void setStatement(SQLStatement statement) {
              if (statement != null) {
                  statement.setParent(this);
              }
              this.statement = statement;
          }
  
          protected void accept0(SQLASTVisitor visitor) {
              if (visitor.visit(this)) {
                  if (this.conditionExpr != null) {
                      this.conditionExpr.accept(visitor);
                  }
  
                  if (this.statement != null) {
                      this.statement.accept(visitor);
                  }
              }
              visitor.endVisit(this);
          }
  
          @Override
          public int hashCode() {
              final int prime = 31;
              int result = 1;
              result = prime * result + ((conditionExpr == null) ? 0 : conditionExpr.hashCode());
              result = prime * result + ((statement == null) ? 0 : statement.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;
              }
              Item other = (Item) obj;
              if (conditionExpr == null) {
                  if (other.conditionExpr != null) {
                      return false;
                  }
              } else if (!conditionExpr.equals(other.conditionExpr)) {
                  return false;
              }
              if (statement == null) {
                  if (other.statement != null) {
                      return false;
                  }
              } else if (!statement.equals(other.statement)) {
                  return false;
              }
              return true;
          }
  
      }
  
      @Override
      public boolean equals(Object o) {
          if (this == o) {
              return true;
          }
          if (o == null || getClass() != o.getClass()) {
              return false;
          }
  
          SQLCaseStatement that = (SQLCaseStatement) o;
  
          if (!items.equals(that.items)) {
              return false;
          }
          if (valueExpr != null ? !valueExpr.equals(that.valueExpr) : that.valueExpr != null) {
              return false;
          }
          return elseStatements != null ? elseStatements.equals(that.elseStatements) : that.elseStatements == null;
      }
  
      @Override
      public int hashCode() {
          int result = items.hashCode();
          result = 31 * result + (valueExpr != null ? valueExpr.hashCode() : 0);
          result = 31 * result + (elseStatements != null ? elseStatements.hashCode() : 0);
          return result;
      }
  }
  