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ProGuardCORE is a free library to read, analyze, modify, and write Java class files.

There is a newer version: 9.1.6

/*
 * ProGuardCORE -- library to process Java bytecode.
 *
 * Copyright (c) 2002-2020 Guardsquare NV
 *
 * 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 proguard.io;

import java.io.*;

/**
 * This {@link DataEntryWriter} writes data entries to a single given file.
 *
 * @see DirectoryWriter
 * @author Eric Lafortune
 */
public class FixedFileWriter implements DataEntryWriter {
  private final File file;
  private OutputStream outputStream;

  /**
   * Creates a new FixedFileWriter.
   *
   * @param file the file to which all data entries will be written.
   */
  public FixedFileWriter(File file) {
    this.file = file;
  }

  // Implementations for DataEntryWriter.

  public boolean createDirectory(DataEntry dataEntry) throws IOException {
    File directory = file;
    if (!directory.exists() && !directory.mkdirs()) {
      throw new IOException("Can't create directory [" + directory.getPath() + "]");
    }

    return true;
  }

  public boolean sameOutputStream(DataEntry dataEntry1, DataEntry dataEntry2) throws IOException {
    return true;
  }

  public OutputStream createOutputStream(DataEntry dataEntry) throws IOException {
    File file = this.file;

    // Make sure the parent directories exist.
    File parentDirectory = file.getParentFile();
    if (parentDirectory != null && !parentDirectory.exists() && !parentDirectory.mkdirs()) {
      throw new IOException("Can't create directory [" + parentDirectory.getPath() + "]");
    }

    outputStream = new BufferedOutputStream(new FileOutputStream(file));

    return outputStream;
  }

  public void close() throws IOException {
    if (outputStream != null) {
      outputStream.close();
      outputStream = null;
    }
  }

  public void println(PrintWriter pw, String prefix) {
    pw.println(prefix + "FixedFileWriter (file [" + file + "])");
  }
}