content: package act.test.verifier;
  
  /*-
   * #%L
   * ACT Framework
   * %%
   * Copyright (C) 2018 ActFramework
   * %%
   * 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 org.osgl.$;
  import org.osgl.util.E;
  
  public abstract class Compare extends Verifier {
  
      public enum Type {
          GT() {
              @Override
              public boolean test(int delta) {
                  return delta < 0;
              }
          },
          GTE() {
              @Override
              public boolean test(int delta) {
                  return delta <= 0;
              }
          },
          LT() {
              @Override
              public boolean test(int delta) {
                  return delta > 0;
              }
          },
          LTE() {
              @Override
              public boolean test(int delta) {
                  return delta >= 0;
              }
          };
  
          public abstract boolean test(int delta);
  
          public <T extends Comparable> boolean applyTo(T expected, T found) {
              return test(expected.compareTo(found));
          }
      }
  
      private Type type;
  
      protected Compare(Type type) {
          this.type = $.requireNotNull(type);
      }
  
      @Override
      public void init(Object expected) {
          boolean isComparable = expected instanceof Comparable;
          E.illegalArgumentIf(!isComparable, "expected value must be either a Comparable");
          super.init(expected);
      }
  
      @Override
      public boolean verify(Object value) {
          E.illegalArgumentIfNot(value instanceof Comparable);
          Class<?> commonSuperType = $.commonSuperTypeOf(initVal, value);
          E.illegalArgumentIfNot(Comparable.class.isAssignableFrom(commonSuperType), "Expected value (%s) cannot be compared to found value (%s)", initVal, value);
          Comparable expected = (Comparable) this.initVal;
          Comparable found = (Comparable) value;
          return type.applyTo(expected, found);
      }
  }
  