| /* |
| * Copyright 2000-2013 JetBrains s.r.o. |
| * |
| * 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. |
| */ |
| package com.intellij.util.containers; |
| |
| import java.util.Iterator; |
| |
| /** |
| * @author dsl |
| */ |
| public class ConvertingIterator <Domain, Range> implements Iterator<Range> { |
| private final Iterator<Domain> myBaseIterator; |
| private final Convertor<Domain, Range> myConvertor; |
| |
| public static class IdConvertor <T> implements Convertor<T, T> { |
| @Override |
| public T convert(T object) { |
| return object; |
| } |
| } |
| |
| public ConvertingIterator(Iterator<Domain> baseIterator, Convertor<Domain, Range> convertor) { |
| myBaseIterator = baseIterator; |
| myConvertor = convertor; |
| } |
| |
| @Override |
| public boolean hasNext() { |
| return myBaseIterator.hasNext(); |
| } |
| |
| @Override |
| public Range next() { |
| return myConvertor.convert(myBaseIterator.next()); |
| } |
| |
| @Override |
| public void remove() { |
| myBaseIterator.remove(); |
| } |
| |
| public static <Domain, Intermediate, Range> Convertor<Domain, Range> composition(final Convertor<Domain, Intermediate> convertor1, |
| final Convertor<Intermediate, Range> convertor2) { |
| return new Convertor<Domain, Range>() { |
| @Override |
| public Range convert(Domain domain) { |
| return convertor2.convert(convertor1.convert(domain)); |
| } |
| }; |
| } |
| |
| public static <Domain, Range> ConvertingIterator<Domain, Range> |
| create(Iterator<Domain> iterator, Convertor<Domain, Range> convertor) { |
| return new ConvertingIterator<Domain, Range>(iterator, convertor); |
| } |
| } |