proguard.io.RenamedParentDataEntryWriter Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of proguard-core Show documentation

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.*;
import proguard.util.StringMatcher;

/**
 * This {@link DataEntryWriter} delegates to another {@link DataEntryWriter}, renaming parent data
 * entries based on the given matcher.
 *
 * @author Thomas Neidhart
 */
public class RenamedParentDataEntryWriter implements DataEntryWriter {
  private final StringMatcher matcher;
  private final String newParentName;
  private final DataEntryWriter dataEntryWriter;

  /**
   * Creates a new RenamedParentDataEntryWriter.
   *
   * @param matcher the string matcher to match parent entries.
   * @param newParentName the new parent name to use.
   * @param dataEntryWriter the DataEntryWriter to which the writing will be delegated.
   */
  public RenamedParentDataEntryWriter(
      StringMatcher matcher, String newParentName, DataEntryWriter dataEntryWriter) {
    this.matcher = matcher;
    this.newParentName = newParentName;
    this.dataEntryWriter = dataEntryWriter;
  }

  // Implementations for DataEntryWriter.

  public boolean createDirectory(DataEntry dataEntry) throws IOException {
    return dataEntryWriter.createDirectory(getRedirectedEntry(dataEntry));
  }

  public boolean sameOutputStream(DataEntry dataEntry1, DataEntry dataEntry2) throws IOException {
    return dataEntryWriter.sameOutputStream(
        getRedirectedEntry(dataEntry1), getRedirectedEntry(dataEntry2));
  }

  public OutputStream createOutputStream(DataEntry dataEntry) throws IOException {
    return dataEntryWriter.createOutputStream(getRedirectedEntry(dataEntry));
  }

  public void close() throws IOException {
    dataEntryWriter.close();
  }

  public void println(PrintWriter pw, String prefix) {
    dataEntryWriter.println(pw, prefix);
  }

  private DataEntry getRedirectedEntry(DataEntry dataEntry) {
    if (dataEntry == null) {
      return null;
    }

    final DataEntry parentEntry = dataEntry.getParent();
    if (parentEntry != null && matcher.matches(parentEntry.getName())) {
      final DataEntry renamedParentEntry = new RenamedDataEntry(parentEntry, newParentName);

      return new WrappedDataEntry(dataEntry) {
        public DataEntry getParent() {
          return renamedParentEntry;
        }
      };
    }

    return dataEntry;
  }
}