| |
| /* ==================================================================== |
| 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.poifs.property; |
| |
| import java.io.IOException; |
| |
| import java.util.*; |
| |
| import org.apache.poi.poifs.common.POIFSConstants; |
| import org.apache.poi.poifs.storage.ListManagedBlock; |
| |
| /** |
| * Factory for turning an array of RawDataBlock instances containing |
| * Property data into an array of proper Property objects. |
| * |
| * The array produced may be sparse, in that any portion of data that |
| * should correspond to a Property, but which does not map to a proper |
| * Property (i.e., a DirectoryProperty, DocumentProperty, or |
| * RootProperty) will get mapped to a null Property in the array. |
| * |
| * @author Marc Johnson (mjohnson at apache dot org) |
| */ |
| |
| class PropertyFactory { |
| // no need for an accessible constructor |
| private PropertyFactory() |
| { |
| } |
| |
| /** |
| * Convert raw data blocks to an array of Property's |
| * |
| * @param blocks to be converted |
| * |
| * @return the converted List of Property objects. May contain |
| * nulls, but will not be null |
| * |
| * @exception IOException if any of the blocks are empty |
| */ |
| static List<Property> convertToProperties(ListManagedBlock [] blocks) |
| throws IOException |
| { |
| List<Property> properties = new ArrayList<Property>(); |
| |
| for (ListManagedBlock block : blocks) { |
| byte[] data = block.getData(); |
| convertToProperties(data, properties); |
| } |
| return properties; |
| } |
| |
| static void convertToProperties(byte[] data, List<Property> properties) |
| throws IOException |
| { |
| int property_count = data.length / POIFSConstants.PROPERTY_SIZE; |
| int offset = 0; |
| |
| for (int k = 0; k < property_count; k++) { |
| switch (data[ offset + PropertyConstants.PROPERTY_TYPE_OFFSET ]) { |
| case PropertyConstants.DIRECTORY_TYPE : |
| properties.add( |
| new DirectoryProperty(properties.size(), data, offset) |
| ); |
| break; |
| |
| case PropertyConstants.DOCUMENT_TYPE : |
| properties.add( |
| new DocumentProperty(properties.size(), data, offset) |
| ); |
| break; |
| |
| case PropertyConstants.ROOT_TYPE : |
| properties.add( |
| new RootProperty(properties.size(), data, offset) |
| ); |
| break; |
| |
| default : |
| properties.add(null); |
| break; |
| } |
| |
| offset += POIFSConstants.PROPERTY_SIZE; |
| } |
| } |
| } |