123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113 |
- /* ====================================================================
- Licensed to the Apache Software Foundation (ASF) under one or more
- contributor license agreements. See the NOTICE file distributed with
- this work for additional information regarding copyright ownership.
- The ASF licenses this file to You under the Apache License, Version 2.0
- (the "License"); you may not use this file except in compliance with
- the License. You may obtain a copy of the License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and
- limitations under the License.
- ==================================================================== */
-
- package org.apache.poi.hssf.record;
-
- import java.util.Map;
- import java.util.function.Supplier;
-
- import org.apache.poi.hssf.util.RKUtil;
- import org.apache.poi.util.GenericRecordUtil;
- import org.apache.poi.util.LittleEndianOutput;
-
- /**
- * An internal 32 bit number with the two most significant bits storing the type.
- * This is part of a bizarre scheme to save disk space and memory (gee look at all the other whole
- * records that are in the file just "cause".., far better to waste processor cycles on this then
- * leave on of those "valuable" records out).
- * We support this in READ-ONLY mode. HSSF converts these to NUMBER records<p>
- *
- * @see org.apache.poi.hssf.record.NumberRecord
- */
- public final class RKRecord extends CellRecord {
- public static final short sid = 0x027E;
- public static final short RK_IEEE_NUMBER = 0;
- public static final short RK_IEEE_NUMBER_TIMES_100 = 1;
- public static final short RK_INTEGER = 2;
- public static final short RK_INTEGER_TIMES_100 = 3;
-
- private int field_4_rk_number;
-
- public RKRecord(RKRecord other) {
- super(other);
- field_4_rk_number = other.field_4_rk_number;
- }
-
- public RKRecord(RecordInputStream in) {
- super(in);
- field_4_rk_number = in.readInt();
- }
-
- /**
- * Extract the value of the number
- * <P>
- * The mechanism for determining the value is dependent on the two
- * low order bits of the raw number. If bit 1 is set, the number
- * is an integer and can be cast directly as a double, otherwise,
- * it's apparently the exponent and mantissa of a double (and the
- * remaining low-order bits of the double's mantissa are 0's).
- * <P>
- * If bit 0 is set, the result of the conversion to a double is
- * divided by 100; otherwise, the value is left alone.
- * <P>
- * [insert picture of Screwy Squirrel in full Napoleonic regalia]
- *
- * @return the value as a proper double (hey, it <B>could</B>
- * happen)
- */
- public double getRKNumber() {
- return RKUtil.decodeNumber(field_4_rk_number);
- }
-
- @Override
- protected String getRecordName() {
- return "RK";
- }
-
- @Override
- protected void serializeValue(LittleEndianOutput out) {
- out.writeInt(field_4_rk_number);
- }
-
- @Override
- protected int getValueDataSize() {
- return 4;
- }
-
- @Override
- public short getSid() {
- return sid;
- }
-
- @Override
- public RKRecord copy() {
- return new RKRecord(this);
- }
-
- @Override
- public HSSFRecordTypes getGenericRecordType() {
- return HSSFRecordTypes.RK;
- }
-
- @Override
- public Map<String, Supplier<?>> getGenericProperties() {
- return GenericRecordUtil.getGenericProperties(
- "base", super::getGenericProperties,
- "rkNumber", this::getRKNumber
- );
- }
- }
|