| /* |
| * 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.psi.search; |
| |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.util.PsiElementFilter; |
| import com.intellij.psi.util.PsiUtilCore; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| /** |
| * @see com.intellij.psi.util.PsiTreeUtil#processElements(com.intellij.psi.PsiElement, PsiElementProcessor) |
| */ |
| public interface PsiElementProcessor<T extends PsiElement> { |
| /** |
| * Processes a PsiElement |
| * |
| * @param element currently processed element. |
| * @return false to stop processing. |
| */ |
| boolean execute(@NotNull T element); |
| |
| class CollectElements<T extends PsiElement> implements PsiElementProcessor<T> { |
| private final Collection<T> myCollection; |
| |
| public CollectElements() { |
| this(new ArrayList<T>()); |
| } |
| |
| public CollectElements(@NotNull Collection<T> collection) { |
| myCollection = Collections.synchronizedCollection(collection); |
| } |
| |
| @NotNull |
| public PsiElement[] toArray() { |
| return PsiUtilCore.toPsiElementArray(myCollection); |
| } |
| |
| @NotNull |
| public Collection<T> getCollection() { |
| return myCollection; |
| } |
| |
| @NotNull |
| public T[] toArray(T[] array) { |
| return myCollection.toArray(array); |
| } |
| |
| @Override |
| public boolean execute(@NotNull T element) { |
| myCollection.add(element); |
| return true; |
| } |
| } |
| |
| class CollectFilteredElements<T extends PsiElement> extends CollectElements<T> { |
| private final PsiElementFilter myFilter; |
| |
| public CollectFilteredElements(@NotNull PsiElementFilter filter, @NotNull Collection<T> collection) { |
| super(collection); |
| myFilter = filter; |
| } |
| |
| public CollectFilteredElements(@NotNull PsiElementFilter filter) { |
| myFilter = filter; |
| } |
| |
| @Override |
| public boolean execute(@NotNull T element) { |
| return !myFilter.isAccepted(element) || super.execute(element); |
| } |
| } |
| |
| class CollectElementsWithLimit<T extends PsiElement> extends CollectElements<T>{ |
| private final AtomicInteger myCount = new AtomicInteger(0); |
| private volatile boolean myOverflow = false; |
| private final int myLimit; |
| |
| public CollectElementsWithLimit(int limit) { |
| myLimit = limit; |
| } |
| |
| public CollectElementsWithLimit(int limit, @NotNull Collection<T> collection) { |
| super(collection); |
| myLimit = limit; |
| } |
| |
| @Override |
| public boolean execute(@NotNull T element) { |
| if (myCount.get() == myLimit){ |
| myOverflow = true; |
| return false; |
| } |
| myCount.incrementAndGet(); |
| return super.execute(element); |
| } |
| |
| public boolean isOverflow() { |
| return myOverflow; |
| } |
| } |
| |
| class FindElement<T extends PsiElement> implements PsiElementProcessor<T> { |
| private volatile T myFoundElement = null; |
| |
| public boolean isFound() { |
| return myFoundElement != null; |
| } |
| |
| @Nullable |
| public T getFoundElement() { |
| return myFoundElement; |
| } |
| |
| public boolean setFound(T element) { |
| myFoundElement = element; |
| return false; |
| } |
| |
| @Override |
| public boolean execute(@NotNull T element) { |
| return setFound(element); |
| } |
| } |
| |
| class FindFilteredElement<T extends PsiElement> extends FindElement<T> { |
| private final PsiElementFilter myFilter; |
| |
| public FindFilteredElement(@NotNull PsiElementFilter filter) { |
| myFilter = filter; |
| } |
| |
| @Override |
| public boolean execute(@NotNull T element) { |
| return !myFilter.isAccepted(element) || super.execute(element); |
| } |
| } |
| } |