platform/platform-impl/src/com/intellij/openapi/vfs/newvfs/impl/VirtualFileImpl.java

/*
 * 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.
 */

/*
 * @author max
 */
package com.intellij.openapi.vfs.newvfs.impl;

import com.intellij.openapi.vfs.VfsUtilCore;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.openapi.vfs.newvfs.NewVirtualFile;
import com.intellij.openapi.vfs.newvfs.NewVirtualFileSystem;
import com.intellij.util.LineSeparator;
import com.intellij.util.containers.ContainerUtil;
import com.intellij.util.keyFMap.KeyFMap;
import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Collection;
import java.util.Collections;

public class VirtualFileImpl extends VirtualFileSystemEntry {

  VirtualFileImpl(int id, VfsData.Segment segment, VirtualDirectoryImpl parent) {
    super(id, segment, parent);
  }

  @Override
  @Nullable
  public NewVirtualFile findChild(@NotNull @NonNls final String name) {
    return null;
  }

  @NotNull
  @Override
  public Collection<VirtualFile> getCachedChildren() {
    return Collections.emptyList();
  }

  @NotNull
  @Override
  public Iterable<VirtualFile> iterInDbChildren() {
    return ContainerUtil.emptyIterable();
  }

  @Override
  @NotNull
  public NewVirtualFileSystem getFileSystem() {
    final VirtualFileSystemEntry parent = getParent();
    assert parent != null;
    return parent.getFileSystem();
  }

  @Override
  @Nullable
  public NewVirtualFile refreshAndFindChild(@NotNull final String name) {
    return null;
  }

  @Override
  @Nullable
  public NewVirtualFile findChildIfCached(@NotNull final String name) {
    return null;
  }

  @Override
  public VirtualFile[] getChildren() {
    return EMPTY_ARRAY;
  }

  @Override
  public boolean isDirectory() {
    return false;
  }

  @Override
  @NotNull
  public InputStream getInputStream() throws IOException {
    return VfsUtilCore.inputStreamSkippingBOM(ourPersistence.getInputStream(this), this);
  }

  @Override
  @NotNull
  public byte[] contentsToByteArray() throws IOException {
    return contentsToByteArray(true);
  }

  @NotNull
  @Override
  public byte[] contentsToByteArray(boolean cacheContent) throws IOException {
    return ourPersistence.contentsToByteArray(this, cacheContent);
  }

  @Override
  @NotNull
  public OutputStream getOutputStream(final Object requestor, final long modStamp, final long timeStamp) throws IOException {
    return VfsUtilCore.outputStreamAddingBOM(ourPersistence.getOutputStream(this, requestor, modStamp, timeStamp), this);
  }

  @Override
  public String getDetectedLineSeparator() {
    if (getFlagInt(SYSTEM_LINE_SEPARATOR_DETECTED)) {
      return LineSeparator.getSystemLineSeparator().getSeparatorString();
    }
    return super.getDetectedLineSeparator();
  }

  @Override
  public void setDetectedLineSeparator(String separator) {
    boolean hasSystemSeparator = LineSeparator.getSystemLineSeparator().getSeparatorString().equals(separator);
    setFlagInt(SYSTEM_LINE_SEPARATOR_DETECTED, hasSystemSeparator);
    super.setDetectedLineSeparator(hasSystemSeparator ? null : separator);
  }

  @Override
  protected void setUserMap(KeyFMap map) {
    mySegment.setUserMap(Math.abs(getId()), map);
  }

  @NotNull
  @Override
  protected KeyFMap getUserMap() {
    return mySegment.getUserMap(this);
  }

  @Override
  protected boolean changeUserMap(KeyFMap oldMap, KeyFMap newMap) {
    return mySegment.changeUserMap(Math.abs(getId()), oldMap, UserDataInterner.internUserData(newMap));
  }

}