| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.commons.compress.changes; |
| |
| import java.io.InputStream; |
| import java.util.Iterator; |
| import java.util.LinkedHashSet; |
| import java.util.Set; |
| |
| import org.apache.commons.compress.archivers.ArchiveEntry; |
| |
| /** |
| * ChangeSet collects and performs changes to an archive. |
| * Putting delete changes in this ChangeSet from multiple threads can |
| * cause conflicts. |
| * |
| * @NotThreadSafe |
| */ |
| public final class ChangeSet { |
| |
| private final Set<Change> changes = new LinkedHashSet<Change>(); |
| |
| /** |
| * Deletes the file with the filename from the archive. |
| * |
| * @param filename |
| * the filename of the file to delete |
| */ |
| public void delete(final String filename) { |
| addDeletion(new Change(filename, Change.TYPE_DELETE)); |
| } |
| |
| /** |
| * Deletes the directory tree from the archive. |
| * |
| * @param dirName |
| * the name of the directory tree to delete |
| */ |
| public void deleteDir(final String dirName) { |
| addDeletion(new Change(dirName, Change.TYPE_DELETE_DIR)); |
| } |
| |
| /** |
| * Adds a new archive entry to the archive. |
| * |
| * @param pEntry |
| * the entry to add |
| * @param pInput |
| * the datastream to add |
| */ |
| public void add(final ArchiveEntry pEntry, final InputStream pInput) { |
| this.add(pEntry, pInput, true); |
| } |
| |
| /** |
| * Adds a new archive entry to the archive. |
| * If replace is set to true, this change will replace all other additions |
| * done in this ChangeSet and all existing entries in the original stream. |
| * |
| * @param pEntry |
| * the entry to add |
| * @param pInput |
| * the datastream to add |
| * @param replace |
| * indicates the this change should replace existing entries |
| */ |
| public void add(final ArchiveEntry pEntry, final InputStream pInput, final boolean replace) { |
| addAddition(new Change(pEntry, pInput, replace)); |
| } |
| |
| /** |
| * Adds an addition change. |
| * |
| * @param pChange |
| * the change which should result in an addition |
| */ |
| private void addAddition(Change pChange) { |
| if (Change.TYPE_ADD != pChange.type() || |
| pChange.getInput() == null) { |
| return; |
| } |
| |
| if (!changes.isEmpty()) { |
| for (Iterator<Change> it = changes.iterator(); it.hasNext();) { |
| Change change = it.next(); |
| if (change.type() == Change.TYPE_ADD |
| && change.getEntry() != null) { |
| ArchiveEntry entry = change.getEntry(); |
| |
| if(entry.equals(pChange.getEntry())) { |
| if(pChange.isReplaceMode()) { |
| it.remove(); |
| changes.add(pChange); |
| return; |
| } else { |
| // do not add this change |
| return; |
| } |
| } |
| } |
| } |
| } |
| changes.add(pChange); |
| } |
| |
| /** |
| * Adds an delete change. |
| * |
| * @param pChange |
| * the change which should result in a deletion |
| */ |
| private void addDeletion(Change pChange) { |
| if ((Change.TYPE_DELETE != pChange.type() && |
| Change.TYPE_DELETE_DIR != pChange.type()) || |
| pChange.targetFile() == null) { |
| return; |
| } |
| String source = pChange.targetFile(); |
| |
| if (!changes.isEmpty()) { |
| for (Iterator<Change> it = changes.iterator(); it.hasNext();) { |
| Change change = it.next(); |
| if (change.type() == Change.TYPE_ADD |
| && change.getEntry() != null) { |
| String target = change.getEntry().getName(); |
| |
| if (Change.TYPE_DELETE == pChange.type() && source.equals(target)) { |
| it.remove(); |
| } else if (Change.TYPE_DELETE_DIR == pChange.type() && |
| target.matches(source + "/.*")) { |
| it.remove(); |
| } |
| } |
| } |
| } |
| changes.add(pChange); |
| } |
| |
| /** |
| * Returns the list of changes as a copy. Changes on this set |
| * are not reflected on this ChangeSet and vice versa. |
| * @return the changes as a copy |
| */ |
| Set<Change> getChanges() { |
| return new LinkedHashSet<Change>(changes); |
| } |
| } |