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.SQLDataType;
  import com.alibaba.druid.sql.ast.SQLObject;
  import com.alibaba.druid.sql.ast.statement.SQLCharacterDataType;
  import com.alibaba.druid.sql.visitor.SQLASTOutputVisitor;
  import com.alibaba.druid.sql.visitor.SQLASTVisitor;
  
  import java.util.Collections;
  import java.util.List;
  
  public class SQLCharExpr extends SQLTextLiteralExpr implements SQLValuableExpr, Comparable<SQLCharExpr> {
      public static final SQLDataType DATA_TYPE = new SQLCharacterDataType("char");
  
      protected String collate;
  
      public SQLCharExpr() {
      }
  
      public SQLCharExpr(String text) {
          this.text = text;
      }
  
      public SQLCharExpr(String text, SQLObject parent) {
          this.text = text;
          this.parent = parent;
      }
  
      public String getCollate() {
          return collate;
      }
  
      public void setCollate(String collate) {
          this.collate = collate;
      }
  
      public void output(StringBuilder buf) {
          this.accept(new SQLASTOutputVisitor(buf));
      }
  
      protected void accept0(SQLASTVisitor visitor) {
          visitor.visit(this);
          visitor.endVisit(this);
      }
  
      @Override
      public Object getValue() {
          return this.text;
      }
  
      public String toString() {
          return SQLUtils.toSQLString(this);
      }
  
      public SQLCharExpr clone() {
          SQLCharExpr expr = new SQLCharExpr(this.text);
          expr.setCollate(collate);
          return expr;
      }
  
      public SQLDataType computeDataType() {
          return DATA_TYPE;
      }
  
      public List<SQLObject> getChildren() {
          return Collections.emptyList();
      }
  
      public SQLDateExpr toDate() {
          return new SQLDateExpr(this.text);
      }
  
      public SQLDateTimeExpr toDateTime() {
          return new SQLDateTimeExpr(this.text);
      }
  
      public SQLTimestampExpr toTimestamp() {
          String text = this.text;
          if (text.length() == 10) {
              text += " 00:00:00";
          }
          return new SQLTimestampExpr(text);
      }
  
      @Override
      public int compareTo(SQLCharExpr o) {
          return this.text.compareTo(o.text);
      }
  }
  