| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| IteratorToGeneratorAdapter |
|
| 2.5;2.5 |
| 1 | /* | |
| 2 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
| 3 | * you may not use this file except in compliance with the License. | |
| 4 | * You may obtain a copy of the License at | |
| 5 | * | |
| 6 | * http://www.apache.org/licenses/LICENSE-2.0 | |
| 7 | * | |
| 8 | * Unless required by applicable law or agreed to in writing, software | |
| 9 | * distributed under the License is distributed on an "AS IS" BASIS, | |
| 10 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 11 | * See the License for the specific language governing permissions and | |
| 12 | * limitations under the License. | |
| 13 | */ | |
| 14 | ||
| 15 | package org.apache.commons.functor.generator; | |
| 16 | ||
| 17 | import org.apache.commons.functor.UnaryProcedure; | |
| 18 | ||
| 19 | import java.util.Iterator; | |
| 20 | ||
| 21 | /** | |
| 22 | * Adapts an {@link Iterator} to the {@link Generator} interface. | |
| 23 | * | |
| 24 | * @since 1.0 | |
| 25 | * @version $Revision: 1156798 $ $Date: 2011-08-11 22:11:07 +0200 (Thu, 11 Aug 2011) $ | |
| 26 | * @author Jason Horman (jason@jhorman.org) | |
| 27 | * @author Rodney Waldhoff | |
| 28 | */ | |
| 29 | public final class IteratorToGeneratorAdapter<E> extends BaseGenerator<E> { | |
| 30 | // instance variables | |
| 31 | //----------------------------------------------------- | |
| 32 | ||
| 33 | private final Iterator<? extends E> iter; | |
| 34 | ||
| 35 | // constructors | |
| 36 | //----------------------------------------------------- | |
| 37 | /** | |
| 38 | * Create a new IteratorToGeneratorAdapter. | |
| 39 | * @param iter Iterator to adapt | |
| 40 | */ | |
| 41 | 86 | public IteratorToGeneratorAdapter(Iterator<? extends E> iter) { |
| 42 | 86 | if (null == iter) { |
| 43 | 2 | throw new IllegalArgumentException("Iterator argument was null"); |
| 44 | } | |
| 45 | 84 | this.iter = iter; |
| 46 | 84 | } |
| 47 | ||
| 48 | // instance methods | |
| 49 | //----------------------------------------------------- | |
| 50 | /** | |
| 51 | * {@inheritDoc} | |
| 52 | */ | |
| 53 | public void run(UnaryProcedure<? super E> proc) { | |
| 54 | 532 | while (iter.hasNext()) { |
| 55 | 478 | proc.run(iter.next()); |
| 56 | 478 | if (isStopped()) { |
| 57 | 8 | break; |
| 58 | } | |
| 59 | } | |
| 60 | 62 | } |
| 61 | ||
| 62 | /** | |
| 63 | * {@inheritDoc} | |
| 64 | */ | |
| 65 | public boolean equals(Object obj) { | |
| 66 | 24 | if (obj == this) { |
| 67 | 8 | return true; |
| 68 | } | |
| 69 | 16 | if (!(obj instanceof IteratorToGeneratorAdapter<?>)) { |
| 70 | 4 | return false; |
| 71 | } | |
| 72 | 12 | IteratorToGeneratorAdapter<?> that = (IteratorToGeneratorAdapter<?>) obj; |
| 73 | 12 | return this.iter.equals(that.iter); |
| 74 | } | |
| 75 | ||
| 76 | /** | |
| 77 | * {@inheritDoc} | |
| 78 | */ | |
| 79 | public int hashCode() { | |
| 80 | 20 | int hash = "IteratorToGeneratorAdapater".hashCode(); |
| 81 | 20 | hash <<= 2; |
| 82 | 20 | hash ^= iter.hashCode(); |
| 83 | 20 | return hash; |
| 84 | } | |
| 85 | ||
| 86 | /** | |
| 87 | * {@inheritDoc} | |
| 88 | */ | |
| 89 | public String toString() { | |
| 90 | 20 | return "IteratorToGeneratorAdapter<" + iter + ">"; |
| 91 | } | |
| 92 | ||
| 93 | // static methods | |
| 94 | //----------------------------------------------------- | |
| 95 | /** | |
| 96 | * Adapt an Iterator to the Generator interface. | |
| 97 | * @param iter to adapt | |
| 98 | * @return IteratorToGeneratorAdapter | |
| 99 | */ | |
| 100 | public static <E> IteratorToGeneratorAdapter<E> adapt(Iterator<? extends E> iter) { | |
| 101 | 48 | return null == iter ? null : new IteratorToGeneratorAdapter<E>(iter); |
| 102 | } | |
| 103 | ||
| 104 | } |