/*
    * Copyright (C) 2014 Atlassian
    *
    * 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.atlassian.jira.rest.client.api.domain;
  
  import com.atlassian.jira.rest.client.api.IssueRestClient;
  import com.google.common.base.Objects;
  import com.google.common.base.Optional;
  import com.google.common.collect.Iterables;
  
  /**
   * Represents operations returned for expand {@link IssueRestClient.Expandos#OPERATIONS}
   *
   * @since 2.0
   */
  public class Operations {
      private final Iterable<OperationGroup> linkGroups;
  
      public Operations(final Iterable<OperationGroup> linkGroups) {
          this.linkGroups = linkGroups;
      }
  
      public Iterable<OperationGroup> getLinkGroups() {
          return linkGroups;
      }
  
      public <T> Optional<T> accept(OperationVisitor<T> visitor) {
          return OperationGroup.accept(getLinkGroups(), visitor);
      }
  
      public Operation getOperationById(final String operationId) {
          return accept(new OperationVisitor<Operation>() {
              @Override
              public Optional<Operation> visit(Operation operation) {
                  return operationId.equals(operation.getId()) ? Optional.of(operation) : Optional.<Operation>absent();
              }
          }).orNull();
      }
  
      @Override
      public int hashCode() {
          return Objects.hashCode(linkGroups);
      }
  
      @Override
      public boolean equals(Object obj) {
          if (this == obj) {
              return true;
          }
          if (obj == null || getClass() != obj.getClass()) {
              return false;
          }
          final Operations other = (Operations) obj;
          return Iterables.elementsEqual(this.linkGroups, other.linkGroups);
      }
  
      @Override
      public String toString() {
          return Objects.toStringHelper(this)
                  .add("linkGroups", linkGroups)
                  .toString();
      }
  }