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/*
* Copyright 2000-2014 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.concurrency.AsyncUtil;
import com.intellij.util.containers.ContainerUtil;
import org.jetbrains.annotations.NotNull;
import java.util.Collection;
import java.util.Iterator;
/**
* @author max
*/
public class CollectionQuery<T> implements Query<T> {
private final Collection<T> myCollection;
public CollectionQuery(@NotNull final Collection<T> collection) {
myCollection = collection;
}
@Override
@NotNull
public Collection<T> findAll() {
return myCollection;
}
@Override
public T findFirst() {
final Iterator<T> i = iterator();
return i.hasNext() ? i.next() : null;
}
@Override
public boolean forEach(@NotNull final Processor<T> consumer) {
return ContainerUtil.process(myCollection, consumer);
}
@NotNull
@Override
public AsyncFuture<Boolean> forEachAsync(@NotNull Processor<T> consumer) {
return AsyncUtil.wrapBoolean(forEach(consumer));
}
@NotNull
@Override
public T[] toArray(@NotNull final T[] a) {
return findAll().toArray(a);
}
@Override
public Iterator<T> iterator() {
return myCollection.iterator();
}
}
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