/*
    * Copyright 2017 LINE Corporation
    *
    * LINE Corporation 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:
    *
    *   https://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.linecorp.centraldogma.common;
  
  import static com.linecorp.centraldogma.internal.Util.validateFilePath;
  import static java.util.Objects.requireNonNull;
  
  import java.util.Collections;
  import java.util.List;
  
  import com.google.common.base.MoreObjects;
  
  final class IdentityQuery<T> implements Query<T> {
  
      private final String path;
      private final QueryType queryType;
  
      IdentityQuery(String path, QueryType queryType) {
          this.path = validateFilePath(path, "path");
          this.queryType = requireNonNull(queryType, "queryType");
      }
  
      @Override
      public String path() {
          return path;
      }
  
      @Override
      public QueryType type() {
          return queryType;
      }
  
      @Override
      public List<String> expressions() {
          return Collections.emptyList();
      }
  
      @Override
      public T apply(T input) {
          return requireNonNull(input, "input");
      }
  
      @Override
      public int hashCode() {
          return path.hashCode();
      }
  
      @Override
      public boolean equals(Object obj) {
          if (!(obj instanceof IdentityQuery)) {
              return false;
          }
  
          if (this == obj) {
              return true;
          }
  
          final IdentityQuery<?> that = (IdentityQuery<?>) obj;
  
          return path().equals(that.path());
      }
  
      @Override
      public String toString() {
          return MoreObjects.toStringHelper(this)
                            .add("path", path)
                            .add("queryType", queryType)
                            .toString();
      }
  }