| /* |
| * Copyright 2000-2012 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.impl.source.resolve.reference.impl.providers; |
| |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.PsiFile; |
| import com.intellij.psi.PsiReference; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * @author Konstantin Bulenkov |
| */ |
| public class FileReferenceUtil { |
| private FileReferenceUtil() { |
| } |
| |
| /** |
| * Returns a PsiFile element referenced to |
| * |
| * @param element some PsiElement |
| * @return a PsiFile element referenced to |
| * @see FileReference |
| * @see com.intellij.psi.impl.source.resolve.reference.impl.providers.FileReferenceSet |
| */ |
| @Nullable |
| public static PsiFile findFile(@Nullable PsiElement element) { |
| return element == null ? null : findFile(element.getReferences()); |
| } |
| |
| /** |
| * Iterates all references starting from the end and looking for FileReference, |
| * when returns <code>resolve()</code> on it. |
| * |
| * @param references references, typically from PsiElement.getReferences() |
| * @return PsiFile if the last FileReference resolves into a real file. |
| * @see com.intellij.psi.impl.source.resolve.reference.impl.providers.FileReference |
| * @see com.intellij.psi.PsiElement#getReferences() |
| */ |
| @Nullable |
| public static PsiFile findFile(PsiReference...references) { |
| for (int i = references.length - 1; i >= 0; i--) { |
| PsiReference ref = references[i]; |
| if (ref instanceof FileReferenceOwner && !(ref instanceof PsiFileReference)) { |
| ref = ((FileReferenceOwner)ref).getLastFileReference(); |
| } |
| if (ref instanceof PsiFileReference) { |
| final PsiElement file = references[i].resolve(); |
| return file instanceof PsiFile ? (PsiFile)file : null; |
| } |
| } |
| return null; |
| } |
| |
| @Nullable |
| public static PsiFileReference findFileReference(@NotNull PsiElement element) { |
| final PsiReference[] references = element.getReferences(); |
| for (int i = references.length - 1; i >= 0; i--) { |
| PsiReference ref = references[i]; |
| if (ref instanceof FileReferenceOwner && !(ref instanceof PsiFileReference)) { |
| ref = ((FileReferenceOwner)ref).getLastFileReference(); |
| } |
| if (ref instanceof PsiFileReference) { |
| return (PsiFileReference)references[i]; |
| } |
| } |
| return null; |
| } |
| } |