| /* |
| * Copyright 2000-2009 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; |
| |
| import com.intellij.concurrency.AsyncFuture; |
| import com.intellij.openapi.util.Condition; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.util.Collection; |
| import java.util.Iterator; |
| |
| /** |
| * @author max |
| */ |
| public class FilteredQuery<T> implements Query<T> { |
| private final Query<T> myOriginal; |
| private final Condition<T> myFilter; |
| |
| public FilteredQuery(final Query<T> original, Condition<T> filter) { |
| myOriginal = original; |
| myFilter = filter; |
| } |
| |
| @Override |
| public T findFirst() { |
| final CommonProcessors.FindFirstProcessor<T> processor = new CommonProcessors.FindFirstProcessor<T>(); |
| forEach(processor); |
| return processor.getFoundValue(); |
| } |
| |
| @Override |
| public boolean forEach(@NotNull final Processor<T> consumer) { |
| myOriginal.forEach(new MyProcessor(consumer)); |
| return true; |
| } |
| |
| @NotNull |
| @Override |
| public AsyncFuture<Boolean> forEachAsync(@NotNull Processor<T> consumer) { |
| return myOriginal.forEachAsync(new MyProcessor(consumer)); |
| } |
| |
| @Override |
| @NotNull |
| public Collection<T> findAll() { |
| CommonProcessors.CollectProcessor<T> processor = new CommonProcessors.CollectProcessor<T>(); |
| forEach(processor); |
| return processor.getResults(); |
| } |
| |
| @NotNull |
| @Override |
| public T[] toArray(@NotNull final T[] a) { |
| return findAll().toArray(a); |
| } |
| |
| @Override |
| public Iterator<T> iterator() { |
| return findAll().iterator(); |
| } |
| |
| private class MyProcessor implements Processor<T> { |
| private final Processor<T> myConsumer; |
| |
| public MyProcessor(Processor<T> consumer) { |
| myConsumer = consumer; |
| } |
| |
| @Override |
| public boolean process(final T t) { |
| if (!myFilter.value(t)) return true; |
| if (!myConsumer.process(t)) return false; |
| |
| return true; |
| } |
| } |
| } |