| /* ==================================================================== |
| 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.poi.hpsf; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.poi.POIDocument; |
| import org.apache.poi.poifs.filesystem.EntryUtils; |
| import org.apache.poi.poifs.filesystem.FilteringDirectoryNode; |
| import org.apache.poi.poifs.filesystem.POIFSFileSystem; |
| |
| /** |
| * A version of {@link POIDocument} which allows access to the |
| * HPSF Properties, but no other document contents. |
| * Normally used when you want to read or alter the Document Properties, |
| * without affecting the rest of the file |
| */ |
| public class HPSFPropertiesOnlyDocument extends POIDocument { |
| public HPSFPropertiesOnlyDocument(POIFSFileSystem fs) { |
| super(fs); |
| } |
| |
| /** |
| * Write out to the currently open file the properties changes, but nothing else |
| */ |
| public void write() throws IOException { |
| POIFSFileSystem fs = getDirectory().getFileSystem(); |
| |
| validateInPlaceWritePossible(); |
| writeProperties(fs, null); |
| fs.writeFilesystem(); |
| } |
| /** |
| * Write out, with any properties changes, but nothing else |
| */ |
| public void write(File newFile) throws IOException { |
| try (POIFSFileSystem fs = POIFSFileSystem.create(newFile)) { |
| write(fs); |
| fs.writeFilesystem(); |
| } |
| } |
| /** |
| * Write out, with any properties changes, but nothing else |
| */ |
| public void write(OutputStream out) throws IOException { |
| try (POIFSFileSystem fs = new POIFSFileSystem()) { |
| write(fs); |
| fs.writeFilesystem(out); |
| } |
| } |
| |
| private void write(POIFSFileSystem fs) throws IOException { |
| // For tracking what we've written out, so far |
| List<String> excepts = new ArrayList<>(2); |
| |
| // Write out our HPFS properties, with any changes |
| writeProperties(fs, excepts); |
| |
| // Copy over everything else unchanged |
| FilteringDirectoryNode src = new FilteringDirectoryNode(getDirectory(), excepts); |
| FilteringDirectoryNode dest = new FilteringDirectoryNode(fs.getRoot(), excepts); |
| EntryUtils.copyNodes(src, dest); |
| |
| // Caller will save the resultant POIFSFileSystem to the stream/file |
| } |
| } |