platform/analysis-impl/src/com/intellij/psi/impl/source/resolve/reference/impl/providers/FileReferenceHelper.java

/*
 * 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.psi.impl.source.resolve.reference.impl.providers;

import com.intellij.codeInspection.LocalQuickFix;
import com.intellij.openapi.extensions.ExtensionPointName;
import com.intellij.openapi.module.Module;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.psi.PsiFileSystemItem;
import com.intellij.psi.PsiManager;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.util.Collection;
import java.util.Collections;
import java.util.List;

/**
 * @author peter
 */
public abstract class FileReferenceHelper {

  public static final ExtensionPointName<FileReferenceHelper> EP_NAME = new ExtensionPointName<FileReferenceHelper>("com.intellij.psi.fileReferenceHelper");

  @NotNull
  public String trimUrl(@NotNull String url) {
    return url;
  }

  @NotNull
  public List<? extends LocalQuickFix> registerFixes(FileReference reference) {
    return Collections.emptyList();
  }

  @Nullable
  public PsiFileSystemItem getPsiFileSystemItem(final Project project, @NotNull final VirtualFile file) {
    final PsiManager psiManager = PsiManager.getInstance(project);
    return getPsiFileSystemItem(psiManager, file);
  }

  public static PsiFileSystemItem getPsiFileSystemItem(PsiManager psiManager, VirtualFile file) {
    return file.isDirectory() ? psiManager.findDirectory(file) : psiManager.findFile(file);
  }

  @Nullable
  public PsiFileSystemItem findRoot(final Project project, @NotNull final VirtualFile file) {
    return null;
  }

  @NotNull
  public Collection<PsiFileSystemItem> getRoots(@NotNull Module module) {
    return Collections.emptyList();
  }

  @NotNull
  public abstract Collection<PsiFileSystemItem> getContexts(final Project project, @NotNull final VirtualFile file);

  public abstract boolean isMine(final Project project, @NotNull final VirtualFile file);

  public boolean isFallback() {
    return false;
  }
}