01: /* ====================================================================
02: Licensed to the Apache Software Foundation (ASF) under one or more
03: contributor license agreements. See the NOTICE file distributed with
04: this work for additional information regarding copyright ownership.
05: The ASF licenses this file to You under the Apache License, Version 2.0
06: (the "License"); you may not use this file except in compliance with
07: the License. You may obtain a copy of the License at
08:
09: http://www.apache.org/licenses/LICENSE-2.0
10:
11: Unless required by applicable law or agreed to in writing, software
12: distributed under the License is distributed on an "AS IS" BASIS,
13: WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: See the License for the specific language governing permissions and
15: limitations under the License.
16: ==================================================================== */
17:
18: package org.apache.poi.poifs.storage;
19:
20: import org.apache.poi.poifs.property.RootProperty;
21:
22: import java.util.*;
23:
24: import java.io.*;
25:
26: /**
27: * This class implements reading the small document block list from an
28: * existing file
29: *
30: * @author Marc Johnson (mjohnson at apache dot org)
31: */
32:
33: public class SmallBlockTableReader {
34:
35: /**
36: * fetch the small document block list from an existing file
37: *
38: * @param blockList the raw data from which the small block table
39: * will be extracted
40: * @param root the root property (which contains the start block
41: * and small block table size)
42: * @param sbatStart the start block of the SBAT
43: *
44: * @return the small document block list
45: *
46: * @exception IOException
47: */
48:
49: public static BlockList getSmallDocumentBlocks(
50: final RawDataBlockList blockList, final RootProperty root,
51: final int sbatStart) throws IOException {
52: BlockList list = new SmallDocumentBlockList(SmallDocumentBlock
53: .extract(blockList.fetchBlocks(root.getStartBlock())));
54:
55: new BlockAllocationTableReader(
56: blockList.fetchBlocks(sbatStart), list);
57: return list;
58: }
59: }
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