107 lines
3.4 KiB
Java
107 lines
3.4 KiB
Java
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/* ====================================================================
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==================================================================== */
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package org.apache.poi.poifs.property;
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import java.io.IOException;
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import java.util.*;
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import org.apache.poi.poifs.common.POIFSConstants;
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import org.apache.poi.poifs.storage.ListManagedBlock;
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/**
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* Factory for turning an array of RawDataBlock instances containing
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* Property data into an array of proper Property objects.
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*
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* The array produced may be sparse, in that any portion of data that
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* should correspond to a Property, but which does not map to a proper
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* Property (i.e., a DirectoryProperty, DocumentProperty, or
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* RootProperty) will get mapped to a null Property in the array.
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*
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* @author Marc Johnson (mjohnson at apache dot org)
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*/
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class PropertyFactory
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{
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// no need for an accessible constructor
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private PropertyFactory()
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{
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}
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/**
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* Convert raw data blocks to an array of Property's
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*
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* @param blocks to be converted
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*
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* @return the converted List of Property objects. May contain
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* nulls, but will not be null
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*
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* @exception IOException if any of the blocks are empty
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*/
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static List<Property> convertToProperties(ListManagedBlock [] blocks)
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throws IOException
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{
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List<Property> properties = new ArrayList<Property>();
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for (int j = 0; j < blocks.length; j++) {
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byte[] data = blocks[ j ].getData();
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convertToProperties(data, properties);
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}
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return properties;
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}
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static void convertToProperties(byte[] data, List<Property> properties)
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throws IOException
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{
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int property_count = data.length / POIFSConstants.PROPERTY_SIZE;
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int offset = 0;
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for (int k = 0; k < property_count; k++) {
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switch (data[ offset + PropertyConstants.PROPERTY_TYPE_OFFSET ]) {
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case PropertyConstants.DIRECTORY_TYPE :
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properties.add(
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new DirectoryProperty(properties.size(), data, offset)
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);
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break;
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case PropertyConstants.DOCUMENT_TYPE :
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properties.add(
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new DocumentProperty(properties.size(), data, offset)
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);
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break;
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case PropertyConstants.ROOT_TYPE :
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properties.add(
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new RootProperty(properties.size(), data, offset)
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);
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break;
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default :
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properties.add(null);
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break;
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}
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offset += POIFSConstants.PROPERTY_SIZE;
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}
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}
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} // end package scope class PropertyFactory
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