/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.phoenix.parse;

public class LimitNode {
  private final BindParseNode bindNode;
  private final LiteralParseNode limitNode;

  LimitNode(BindParseNode bindNode) {
    this.bindNode = bindNode;
    limitNode = null;
  }

  LimitNode(LiteralParseNode limitNode) {
    this.limitNode = limitNode;
    this.bindNode = null;
  }

  public ParseNode getLimitParseNode() {
    return bindNode == null ? limitNode : bindNode;
  }

  @Override
  public String toString() {
    return bindNode == null ? limitNode.toString() : bindNode.toString();
  }

  @Override
  public int hashCode() {
    final int prime = 31;
    int result = 1;
    result = prime * result + ((bindNode == null) ? 0 : bindNode.hashCode());
    result = prime * result + ((limitNode == null) ? 0 : limitNode.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;
    LimitNode other = (LimitNode) obj;
    if (bindNode == null) {
      if (other.bindNode != null) return false;
    } else if (!bindNode.equals(other.bindNode)) return false;
    if (limitNode == null) {
      if (other.limitNode != null) return false;
    } else if (!limitNode.equals(other.limitNode)) return false;
    return true;
  }
}
