67 lines
2.5 KiB
Java
67 lines
2.5 KiB
Java
/* ====================================================================
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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.storage;
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import java.io.IOException;
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import org.apache.poi.poifs.common.POIFSBigBlockSize;
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import org.apache.poi.poifs.property.RootProperty;
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/**
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* This class implements reading the small document block list from an
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* existing file
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*
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* @author Marc Johnson (mjohnson at apache dot org)
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*/
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public final class SmallBlockTableReader {
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/**
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* fetch the small document block list from an existing file
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*
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* @param blockList the raw data from which the small block table
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* will be extracted
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* @param root the root property (which contains the start block
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* and small block table size)
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* @param sbatStart the start block of the SBAT
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*
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* @return the small document block list
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*
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* @exception IOException
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*/
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public static BlockList getSmallDocumentBlocks(
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final POIFSBigBlockSize bigBlockSize,
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final RawDataBlockList blockList, final RootProperty root,
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final int sbatStart)
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throws IOException
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{
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// Fetch the blocks which hold the Small Blocks stream
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ListManagedBlock [] smallBlockBlocks =
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blockList.fetchBlocks(root.getStartBlock(), -1);
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// Turn that into a list
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BlockList list =new SmallDocumentBlockList(
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SmallDocumentBlock.extract(bigBlockSize, smallBlockBlocks));
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// Process
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new BlockAllocationTableReader(bigBlockSize,
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blockList.fetchBlocks(sbatStart, -1),
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list);
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return list;
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}
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}
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