128 lines
4.5 KiB
Java
128 lines
4.5 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.hssf.record;
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import org.apache.poi.util.HexDump;
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import org.apache.poi.util.LittleEndianOutput;
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/**
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* Title: DBCell Record (0x00D7)<p>
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* Description: Used by Excel and other MS apps to quickly find rows in the sheets.<P>
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* REFERENCE: PG 299/440 Microsoft Excel 97 Developer's Kit (ISBN: 1-57231-498-2)
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*/
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public final class DBCellRecord extends StandardRecord implements Cloneable {
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public final static short sid = 0x00D7;
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public final static int BLOCK_SIZE = 32;
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public static final class Builder {
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private short[] _cellOffsets;
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private int _nCellOffsets;
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public Builder() {
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_cellOffsets = new short[4];
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}
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public void addCellOffset(int cellRefOffset) {
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if (_cellOffsets.length <= _nCellOffsets) {
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short[] temp = new short[_nCellOffsets * 2];
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System.arraycopy(_cellOffsets, 0, temp, 0, _nCellOffsets);
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_cellOffsets = temp;
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}
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_cellOffsets[_nCellOffsets] = (short) cellRefOffset;
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_nCellOffsets++;
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}
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public DBCellRecord build(int rowOffset) {
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short[] cellOffsets = new short[_nCellOffsets];
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System.arraycopy(_cellOffsets, 0, cellOffsets, 0, _nCellOffsets);
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return new DBCellRecord(rowOffset, cellOffsets);
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}
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}
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/**
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* offset from the start of this DBCellRecord to the start of the first cell in
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* the next DBCell block.
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*/
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private final int field_1_row_offset;
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private final short[] field_2_cell_offsets;
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DBCellRecord(int rowOffset, short[]cellOffsets) {
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field_1_row_offset = rowOffset;
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field_2_cell_offsets = cellOffsets;
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}
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public DBCellRecord(RecordInputStream in) {
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field_1_row_offset = in.readUShort();
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int size = in.remaining();
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field_2_cell_offsets = new short[ size / 2 ];
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for (int i=0;i<field_2_cell_offsets.length;i++)
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{
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field_2_cell_offsets[ i ] = in.readShort();
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}
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}
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public String toString() {
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StringBuffer buffer = new StringBuffer();
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buffer.append("[DBCELL]\n");
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buffer.append(" .rowoffset = ").append(HexDump.intToHex(field_1_row_offset)).append("\n");
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for (int k = 0; k < field_2_cell_offsets.length; k++) {
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buffer.append(" .cell_").append(k).append(" = ")
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.append(HexDump.shortToHex(field_2_cell_offsets[ k ])).append("\n");
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}
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buffer.append("[/DBCELL]\n");
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return buffer.toString();
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}
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public void serialize(LittleEndianOutput out) {
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out.writeInt(field_1_row_offset);
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for (int k = 0; k < field_2_cell_offsets.length; k++) {
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out.writeShort(field_2_cell_offsets[ k ]);
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}
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}
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protected int getDataSize() {
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return 4 + field_2_cell_offsets.length * 2;
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}
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/**
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* @param nBlocks number of blocks
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* @param nRows number of rows
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*
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* @return the size of the group of <tt>DBCellRecord</tt>s needed to encode
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* the specified number of blocks and rows
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*
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* @deprecated in POI 3.15-beta2, scheduled for removal in POI 3.17 - this method is not used within POI
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*/
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public static int calculateSizeOfRecords(int nBlocks, int nRows) {
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// One DBCell per block.
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// 8 bytes per DBCell (non variable section)
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// 2 bytes per row reference
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return nBlocks * 8 + nRows * 2;
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}
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public short getSid() {
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return sid;
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}
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@Override
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public DBCellRecord clone() {
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// safe because immutable
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return this;
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}
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}
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