content: package com.alibaba.druid.sql.dialect.bigquery.ast;
  
  import com.alibaba.druid.sql.ast.SQLExpr;
  import com.alibaba.druid.sql.ast.SQLObject;
  import com.alibaba.druid.sql.ast.expr.SQLCharExpr;
  import com.alibaba.druid.sql.dialect.bigquery.visitor.BigQueryVisitor;
  import com.alibaba.druid.sql.visitor.SQLASTVisitor;
  
  import java.util.Collections;
  import java.util.List;
  
  public class BigQueryCharExpr extends SQLCharExpr implements SQLExpr, BigQueryObject {
      private String prefix;
      private boolean space;
      private boolean isAlias;
  
      public BigQueryCharExpr() {
      }
  
      public boolean hasPrefix() {
          return prefix != null;
      }
  
      public void setPrefix(String prefix) {
          this.prefix = prefix;
      }
  
      public String getPrefix() {
          return prefix;
      }
  
      public boolean isSpace() {
          return space;
      }
  
      public void setSpace(boolean space) {
          this.space = space;
      }
  
      public boolean isAlias() {
          return isAlias;
      }
  
      public void setAlias(boolean alias) {
          isAlias = alias;
      }
  
      public BigQueryCharExpr(String text, String prefix) {
          this(text, prefix, false, false);
      }
  
      public BigQueryCharExpr(String text, String prefix, boolean space, boolean isAlias) {
          this.prefix = prefix;
          this.text = text;
          this.space = space;
          this.isAlias = isAlias;
      }
  
      public void accept0(BigQueryVisitor v) {
          v.visit(this);
          v.endVisit(this);
      }
  
      @Override
      public void accept0(SQLASTVisitor v) {
          if (v instanceof BigQueryVisitor) {
              this.accept0((BigQueryVisitor) v);
              return;
          }
          v.visit(this);
          v.endVisit(this);
      }
  
      @Override
      public List<SQLObject> getChildren() {
          return Collections.emptyList();
      }
  
      @Override
      public BigQueryCharExpr clone() {
          BigQueryCharExpr clone = new BigQueryCharExpr();
          clone.setPrefix(this.prefix);
          clone.setText(this.text);
          clone.setSpace(this.space);
          clone.setAlias(this.isAlias);
          return clone;
      }
  }
  