Coverage Report - org.apache.commons.functor.adapter.UnaryFunctionUnaryPredicate
 
Classes in this File Line Coverage Branch Coverage Complexity
UnaryFunctionUnaryPredicate
92%
13/14
70%
14/20
2.143
 
 1   
 /*
 2   
  * Licensed to the Apache Software Foundation (ASF) under one or more
 3   
  * contributor license agreements.  See the NOTICE file distributed with
 4   
  * this work for additional information regarding copyright ownership.
 5   
  * The ASF licenses this file to You under the Apache License, Version 2.0
 6   
  * (the "License"); you may not use this file except in compliance with
 7   
  * the License.  You may obtain a copy of the License at
 8   
  *
 9   
  *      http://www.apache.org/licenses/LICENSE-2.0
 10   
  *
 11   
  * Unless required by applicable law or agreed to in writing, software
 12   
  * distributed under the License is distributed on an "AS IS" BASIS,
 13   
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 14   
  * See the License for the specific language governing permissions and
 15   
  * limitations under the License.
 16   
  */
 17   
 package org.apache.commons.functor.adapter;
 18   
 
 19   
 import java.io.Serializable;
 20   
 
 21   
 import org.apache.commons.functor.UnaryFunction;
 22   
 import org.apache.commons.functor.UnaryPredicate;
 23   
 
 24   
 /**
 25   
  * Adapts a <code>Boolean</code>-valued
 26   
  * {@link UnaryFunction UnaryFunction}
 27   
  * to the {@link UnaryPredicate UnaryPredicate}
 28   
  * interface.
 29   
  * <p/>
 30   
  * Note that although this class implements
 31   
  * {@link Serializable}, a given instance will
 32   
  * only be truly <code>Serializable</code> if the
 33   
  * underlying function is.  Attempts to serialize
 34   
  * an instance whose delegate is not
 35   
  * <code>Serializable</code> will result in an exception.
 36   
  *
 37   
  * @param <A> the argument type.
 38   
  * @version $Revision: 1157648 $ $Date: 2011-08-14 22:22:47 +0200 (Sun, 14 Aug 2011) $
 39   
  * @author Rodney Waldhoff
 40   
  */
 41   
 public final class UnaryFunctionUnaryPredicate<A> implements UnaryPredicate<A>, Serializable {
 42   
     /**
 43   
      * serialVersionUID declaration.
 44   
      */
 45   
     private static final long serialVersionUID = -9211927278252224707L;
 46   
     /** The {@link UnaryFunction UnaryFunction} I'm wrapping. */
 47   
     private final UnaryFunction<? super A, Boolean> function;
 48   
 
 49   
     /**
 50   
      * Create an {@link UnaryPredicate UnaryPredicate} wrapping
 51   
      * the given {@link UnaryFunction UnaryFunction}.
 52   
      * @param function the {@link UnaryFunction UnaryFunction} to wrap
 53   
      */
 54  36 
     public UnaryFunctionUnaryPredicate(UnaryFunction<? super A, Boolean> function) {
 55  36 
         if (function == null) {
 56  0 
             throw new IllegalArgumentException("UnaryFunction argument was null");
 57   
         }
 58  36 
         this.function = function;
 59  36 
     }
 60   
 
 61   
     /**
 62   
      * {@inheritDoc}
 63   
      * Returns the <code>boolean</code> value of the non-<code>null</code>
 64   
      * <code>Boolean</code> returned by the {@link UnaryFunction#evaluate evaluate}
 65   
      * method of my underlying function.
 66   
      */
 67   
     public boolean test(A obj) {
 68  16 
         return function.evaluate(obj);
 69   
     }
 70   
 
 71   
     /**
 72   
      * {@inheritDoc}
 73   
      */
 74   
     public boolean equals(Object that) {
 75  34 
         return that == this
 76   
                 || (that instanceof UnaryFunctionUnaryPredicate<?> && equals((UnaryFunctionUnaryPredicate<?>) that));
 77   
     }
 78   
 
 79   
     /**
 80   
      * Learn whether another UnaryFunctionUnaryPredicate is equal to this.
 81   
      * @param that UnaryFunctionUnaryPredicate to test
 82   
      * @return boolean
 83   
      */
 84   
     public boolean equals(UnaryFunctionUnaryPredicate<?> that) {
 85  22 
         return null != that && (null == function ? null == that.function : function.equals(that.function));
 86   
     }
 87   
 
 88   
     /**
 89   
      * {@inheritDoc}
 90   
      */
 91   
     public int hashCode() {
 92  44 
         int hash = "UnaryFunctionUnaryPredicate".hashCode();
 93  44 
         if (null != function) {
 94  44 
             hash ^= function.hashCode();
 95   
         }
 96  44 
         return hash;
 97   
     }
 98   
 
 99   
     /**
 100   
      * {@inheritDoc}
 101   
      */
 102   
     public String toString() {
 103  36 
         return "UnaryFunctionUnaryPredicate<" + function + ">";
 104   
     }
 105   
 
 106   
     /**
 107   
      * Adapt the given, possibly-<code>null</code>,
 108   
      * {@link UnaryFunction UnaryFunction} to the
 109   
      * {@link UnaryPredicate UnaryPredicate} interface.
 110   
      * When the given <code>UnaryFunction</code> is <code>null</code>,
 111   
      * returns <code>null</code>.
 112   
      *
 113   
      * @param <A> the argument type.
 114   
      * @param function the possibly-<code>null</code>
 115   
      *        {@link UnaryFunction UnaryFunction} to adapt
 116   
      * @return a {@link UnaryPredicate UnaryPredicate} wrapping the given
 117   
      *         {@link UnaryFunction UnaryFunction}, or <code>null</code>
 118   
      *         if the given <code>UnaryFunction</code> is <code>null</code>
 119   
      */
 120   
     public static <A> UnaryFunctionUnaryPredicate<A> adapt(UnaryFunction<? super A, Boolean> function) {
 121  6 
         return null == function ? null : new UnaryFunctionUnaryPredicate<A>(function);
 122   
     }
 123   
 
 124   
 }
Report generated by Cobertura 1.9.4.1 on 9/15/11 10:50 PM.