content: package net.sf.expectit.matcher;
  
  /*
   * #%L
   * ExpectIt
   * %%
   * Copyright (C) 2014 Alexey Gavrilov and contributors
   * %%
   * 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.
   * #L%
   */
  
  import net.sf.expectit.Result;
  
  /**
   * A result of string matching.
   */
  public class SimpleResult implements Result {
      private final boolean succeeded;
      private final String before;
      private final String group;
      private final String input;
      private final boolean canStopMatching;
  
      /**
       * Creates an instance with the initial field values.
       *  @param succeeded the success flag.
       * @param input the matcher`s input string.
       * @param before    the string before match, not {@code null}.
       * @param group     the string group, not {@code null}.
       * @param canStopMatching
       */
      protected SimpleResult(
              final boolean succeeded,
              final String input,
              final String before,
              final String group,
              final boolean canStopMatching) {
          this.succeeded = succeeded;
          this.input = input;
          this.before = before;
          this.group = group;
          this.canStopMatching = canStopMatching;
      }
  
      @Override
      public String getInput() {
          return input;
      }
  
      @Override
      public boolean isSuccessful() {
          return succeeded;
      }
  
      @Override
      public String getBefore() {
          checkSucceeded();
          return before;
      }
  
      @Override
      public boolean canStopMatching() {
          return canStopMatching;
      }
  
      @Override
      public int start() {
          return getBefore().length();
      }
  
      @Override
      public int start(int group) {
          checkGroup(group);
          return start();
      }
  
      @Override
      public int end() {
          return start() + group().length();
      }
  
      @Override
      public int end(int group) {
          checkGroup(group);
          return end();
      }
  
      @Override
      public String group() {
          checkSucceeded();
          return group;
      }
  
      @Override
      public String group(int group) {
          checkGroup(group);
          return group();
      }
  
      @Override
      public int groupCount() {
          return 0;
      }
  
      void checkGroup(int group) {
          if (group != 0) {
              throw new IndexOutOfBoundsException();
          }
      }
  
      private void checkSucceeded() {
          if (!succeeded) {
              throw new IllegalStateException();
          }
      }
  
      /**
       * Creates an instance of a successful result type.
       * The {@link net.sf.expectit.Result#canStopMatching()} is always set to {@code true}.
       * @param input the matcher`s input string.
       * @param before the string before match, not {@code null}.
       * @param group the string group, not {@code null}.
       * @return the result object.
       */
      public static Result success(String input, String before, String group) {
          return new SimpleResult(true, input, before, group, true);
      }
  
      /**
       * Creates an instance of an unsuccessful match.
       * @param input the input string.
       * @param canStopMatching indicates whether matching operation can be stopped.
       * @return the result object.
       */
      public static Result failure(String input, boolean canStopMatching) {
          return new SimpleResult(false, input, null, null, canStopMatching);
      }
  
      @Override
      public String toString() {
          return "SimpleResult{"
                  + "succeeded=" + succeeded
                  + ", before='" + before + '\''
                  + ", group='" + group + '\''
                  + ", input='" + input + '\''
                  + ", canStopMatching=" + canStopMatching + '}';
      }
  }
  