studio.raptor.sqlparser.ast.expr.SQLIdentifierExpr Maven / Gradle / Ivy

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/*
 * 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 studio.raptor.sqlparser.ast.expr;

import studio.raptor.sqlparser.ast.SQLExprImpl;
import studio.raptor.sqlparser.ast.SQLName;
import studio.raptor.sqlparser.visitor.SQLASTVisitor;

public class SQLIdentifierExpr extends SQLExprImpl implements SQLName {

  private String name;

  private transient String lowerName;

  public SQLIdentifierExpr() {

  }

  public SQLIdentifierExpr(String name) {
    this.name = name;
  }

  public String getSimpleName() {
    return name;
  }

  public String getName() {
    return this.name;
  }

  public void setName(String name) {
    this.name = name;
    this.lowerName = null;
  }

  public String getLowerName() {
    if (lowerName == null && name != null) {
      lowerName = name.toLowerCase();
    }
    return lowerName;
  }

  public void setLowerName(String lowerName) {
    this.lowerName = lowerName;
  }

  public void output(StringBuffer buf) {
    buf.append(this.name);
  }

  protected void accept0(SQLASTVisitor visitor) {
    visitor.visit(this);

    visitor.endVisit(this);
  }

  @Override
  public int hashCode() {
    final int prime = 31;
    int result = 1;
    result = prime * result + ((name == null) ? 0 : name.hashCode());
    return result;
  }

  @Override
  public boolean equals(Object obj) {
    if (this == obj) {
      return true;
    }
    if (obj == null) {
      return false;
    }
    if (!(obj instanceof SQLIdentifierExpr)) {
      return false;
    }
    SQLIdentifierExpr other = (SQLIdentifierExpr) obj;
    if (name == null) {
      if (other.name != null) {
        return false;
      }
    } else if (!name.equals(other.name)) {
      return false;
    }
    return true;
  }

  public String toString() {
    return this.name;
  }
}