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.ast.expr;
  
  import com.alibaba.druid.sql.ast.SQLExpr;
  import com.alibaba.druid.sql.ast.SQLName;
  import com.alibaba.druid.sql.ast.SQLObject;
  import com.alibaba.druid.sql.ast.expr.SQLIdentifierExpr;
  import com.alibaba.druid.sql.ast.expr.SQLPropertyExpr;
  import com.alibaba.druid.sql.ast.statement.SQLColumnDefinition;
  import com.alibaba.druid.sql.dialect.sqlserver.ast.SQLServerObjectImpl;
  import com.alibaba.druid.sql.dialect.sqlserver.visitor.SQLServerASTVisitor;
  import com.alibaba.druid.sql.visitor.SQLASTVisitor;
  import com.alibaba.druid.util.FnvHash;
  
  import java.util.Collections;
  import java.util.List;
  
  public class SQLServerObjectReferenceExpr extends SQLServerObjectImpl implements SQLServerExpr, SQLName {
      private String server;
      private String database;
      private String schema;
  
      protected long schemaHashCode64;
      protected long hashCode64;
  
      public SQLServerObjectReferenceExpr() {
      }
  
      public SQLServerObjectReferenceExpr(SQLExpr owner) {
          if (owner instanceof SQLIdentifierExpr) {
              this.database = ((SQLIdentifierExpr) owner).getName();
          } else if (owner instanceof SQLPropertyExpr) {
              SQLPropertyExpr propExpr = (SQLPropertyExpr) owner;
  
              this.server = ((SQLIdentifierExpr) propExpr.getOwner()).getName();
              this.database = propExpr.getName();
          } else {
              throw new IllegalArgumentException(owner.toString());
          }
      }
  
      public String getSimpleName() {
          if (schema != null) {
              return schema;
          }
  
          if (database != null) {
              return database;
          }
          return server;
      }
  
      @Override
      public void accept0(SQLASTVisitor v) {
          if (v instanceof SQLServerASTVisitor) {
              accept0((SQLServerASTVisitor) v);
          }
      }
  
      @Override
      public void accept0(SQLServerASTVisitor visitor) {
          visitor.visit(this);
          visitor.endVisit(this);
      }
  
      public void output(StringBuilder buf) {
          boolean flag = false;
          if (server != null) {
              buf.append(server);
              flag = true;
          }
  
          if (flag) {
              buf.append('.');
          }
          if (database != null) {
              buf.append(database);
              flag = true;
          }
  
          if (flag) {
              buf.append('.');
          }
  
          if (schema != null) {
              buf.append(schema);
              flag = true;
          }
      }
  
      public String getServer() {
          return server;
      }
  
      public void setServer(String server) {
          this.server = server;
      }
  
      public String getDatabase() {
          return database;
      }
  
      public void setDatabase(String database) {
          this.database = database;
      }
  
      public String getSchema() {
          return schema;
      }
  
      public void setSchema(String schema) {
          this.schema = schema;
      }
  
      public SQLServerObjectReferenceExpr clone() {
          SQLServerObjectReferenceExpr x = new SQLServerObjectReferenceExpr();
  
          x.server = server;
          x.database = database;
          x.schema = schema;
  
          x.schemaHashCode64 = schemaHashCode64;
          x.hashCode64 = hashCode64;
  
          return x;
      }
  
      public long nameHashCode64() {
          if (schemaHashCode64 == 0
                  && schema != null) {
              schemaHashCode64 = FnvHash.hashCode64(schema);
          }
          return schemaHashCode64;
      }
  
      @Override
      public long hashCode64() {
          if (hashCode64 == 0) {
              if (server == null) {
                  hashCode64 = new SQLPropertyExpr(
                          new SQLPropertyExpr(server, database),
                          schema
                  ).hashCode64();
              } else {
                  hashCode64 = new SQLPropertyExpr(database, schema)
                          .hashCode64();
              }
          }
          return hashCode64;
      }
  
      @Override
      public SQLColumnDefinition getResolvedColumn() {
          return null;
      }
  
      public List<SQLObject> getChildren() {
          return Collections.<SQLObject>emptyList();
      }
  }
  