107 lines
3.7 KiB
Java
107 lines
3.7 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.hssf.util.RKUtil;
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import org.apache.poi.util.LittleEndianOutput;
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/**
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* Title: RK Record (0x027E)<p>
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* Description: An internal 32 bit number with the two most significant bits
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* storing the type. This is part of a bizarre scheme to save disk
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* space and memory (gee look at all the other whole records that
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* are in the file just "cause"..,far better to waste processor
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* cycles on this then leave on of those "valuable" records out).<p>
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* We support this in READ-ONLY mode. HSSF converts these to NUMBER records<p>
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*
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* REFERENCE: PG 376 Microsoft Excel 97 Developer's Kit (ISBN: 1-57231-498-2)
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*
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* @see org.apache.poi.hssf.record.NumberRecord
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*/
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public final class RKRecord extends CellRecord {
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public final static short sid = 0x027E;
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public final static short RK_IEEE_NUMBER = 0;
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public final static short RK_IEEE_NUMBER_TIMES_100 = 1;
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public final static short RK_INTEGER = 2;
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public final static short RK_INTEGER_TIMES_100 = 3;
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private int field_4_rk_number;
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private RKRecord() {
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// fields uninitialised
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}
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public RKRecord(RecordInputStream in) {
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super(in);
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field_4_rk_number = in.readInt();
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}
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/**
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* Extract the value of the number
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* <P>
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* The mechanism for determining the value is dependent on the two
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* low order bits of the raw number. If bit 1 is set, the number
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* is an integer and can be cast directly as a double, otherwise,
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* it's apparently the exponent and mantissa of a double (and the
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* remaining low-order bits of the double's mantissa are 0's).
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* <P>
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* If bit 0 is set, the result of the conversion to a double is
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* divided by 100; otherwise, the value is left alone.
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* <P>
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* [insert picture of Screwy Squirrel in full Napoleonic regalia]
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*
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* @return the value as a proper double (hey, it <B>could</B>
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* happen)
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*/
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public double getRKNumber() {
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return RKUtil.decodeNumber(field_4_rk_number);
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}
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@Override
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protected String getRecordName() {
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return "RK";
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}
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@Override
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protected void appendValueText(StringBuilder sb) {
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sb.append(" .value= ").append(getRKNumber());
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}
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@Override
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protected void serializeValue(LittleEndianOutput out) {
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out.writeInt(field_4_rk_number);
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}
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@Override
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protected int getValueDataSize() {
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return 4;
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}
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@Override
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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 Object clone() {
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RKRecord rec = new RKRecord();
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copyBaseFields(rec);
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rec.field_4_rk_number = field_4_rk_number;
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return rec;
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}
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}
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