001    /*
002     * Created on Nov 18, 2010
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
005     * the License. You may obtain a copy of the License at
006     *
007     * http://www.apache.org/licenses/LICENSE-2.0
008     *
009     * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
010     * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
011     * specific language governing permissions and limitations under the License.
012     *
013     * Copyright @2010-2011 the original author or authors.
014     */
015    package org.fest.assertions.api;
016    
017    import java.util.Comparator;
018    
019    import org.fest.assertions.core.ComparableAssert;
020    import org.fest.assertions.internal.Comparables;
021    import org.fest.util.*;
022    
023    /**
024     * Base class for all implementations of <code>{@link ComparableAssert}</code>.
025     * @param <S> the "self" type of this assertion class. Please read
026     * &quot;<a href="http://bit.ly/anMa4g" target="_blank">Emulating 'self types' using Java Generics to simplify fluent
027     * API implementation</a>&quot; for more details.
028     * @param <A> the type of the "actual" value.
029     *
030     * @author Alex Ruiz
031     */
032    public abstract class AbstractComparableAssert<S, A extends Comparable<A>> extends AbstractAssert<S, A> implements ComparableAssert<S, A> {
033    
034      @VisibleForTesting Comparables comparables = Comparables.instance();
035    
036      protected AbstractComparableAssert(A actual, Class<S> selfType) {
037        super(actual, selfType);
038      }
039    
040      /** {@inheritDoc} */
041      public final S isLessThan(A other) {
042        comparables.assertLessThan(info, actual, other);
043        return myself;
044      }
045    
046      /** {@inheritDoc} */
047      public final S isLessThanOrEqualTo(A other) {
048        comparables.assertLessThanOrEqualTo(info, actual, other);
049        return myself;
050      }
051    
052      /** {@inheritDoc} */
053      public final S isGreaterThan(A other) {
054        comparables.assertGreaterThan(info, actual, other);
055        return myself;
056      }
057    
058      /** {@inheritDoc} */
059      public final S isGreaterThanOrEqualTo(A other) {
060        comparables.assertGreaterThanOrEqualTo(info, actual, other);
061        return myself;
062      }
063    
064      @Override
065      public S usingComparator(Comparator<?> customComparator) {
066        super.usingComparator(customComparator);
067        this.comparables = new Comparables(new ComparatorBasedComparisonStrategy(customComparator));
068        return myself;
069      }
070      
071      @Override
072      public S usingDefaultComparator() {
073        super.usingDefaultComparator();
074        this.comparables = Comparables.instance();
075        return myself;
076      }
077    }