code: // Licensed to the Software Freedom Conservancy (SFC) under one
  // or more contributor license agreements.  See the NOTICE file
  // distributed with this work for additional information
  // regarding copyright ownership.  The SFC 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.openqa.selenium.lift.find;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.List;
  import org.hamcrest.Description;
  import org.hamcrest.Matcher;
  import org.hamcrest.TypeSafeMatcher;
  
  /**
   * Base class for {@link Finder}s. These allow the creation of a specification to be applied to
   * objects of type T, to identify and return a Collection of any contained objects of type S.
   */
  @Deprecated
  public abstract class BaseFinder<S, T> implements Finder<S, T> {
  
    protected List<Matcher<S>> matchers = new ArrayList<>();
  
    @Override
    public Collection<S> findFrom(T context) {
  
      Collection<S> found = extractFrom(context);
  
      if (matchers.isEmpty()) {
        return found;
      }
      return allMatching(matchers, found);
    }
  
    @Override
    public Finder<S, T> with(Matcher<S> matcher) {
      this.matchers.add(matcher);
      return this;
    }
  
    @Override
    public void describeTo(Description description) {
      describeTargetTo(description);
      for (Matcher<?> matcher : matchers) {
        if (matcher != null) {
          description.appendText(" with ");
          matcher.describeTo(description);
        }
      }
    }
  
    protected abstract Collection<S> extractFrom(T context);
  
    protected abstract void describeTargetTo(Description description);
  
    protected Collection<S> allMatching(List<Matcher<S>> matchers, Collection<S> items) {
      Collection<S> temp = new ArrayList<>();
      for (S item : items) {
        if (allOf(matchers).matches(item)) {
          temp.add(item);
        }
      }
      return temp;
    }
  
    private Matcher<S> allOf(final List<Matcher<S>> matcherList) {
      return new TypeSafeMatcher<S>() {
        @Override
        public boolean matchesSafely(S item) {
          for (Matcher<S> matcher : matcherList) {
            if (!matcher.matches(item)) {
              return false;
            }
          }
          return true;
        }
  
        @Override
        public void describeTo(Description description) {
          for (Matcher<S> matcher : matcherList) {
            matcher.describeTo(description);
          }
        }
      };
    }
  }
  