iterationrecord.java

Office格式转换代码

/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2003 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Apache" and "Apache Software Foundation" and
 *    "Apache POI" must not be used to endorse or promote products
 *    derived from this software without prior written permission. For
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 * 5. Products derived from this software may not be called "Apache",
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 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

package org.apache.poi.hssf.record;

import org.apache.poi.util.LittleEndian;

/**
 * Title:        Iteration Record<P>
 * Description:  Tells whether to iterate over forumla calculations or not
 *               (if a formula is dependant upon another formula's result)
 *               (odd feature for something that can only have 32 elements in
 *                a formula!)<P>
 * REFERENCE:  PG 325 Microsoft Excel 97 Developer's Kit (ISBN: 1-57231-498-2)<P>
 * @author Andrew C. Oliver (acoliver at apache dot org)
 * @author Jason Height (jheight at chariot dot net dot au)
 * @version 2.0-pre
 */

public class IterationRecord
    extends Record
{
    public final static short sid = 0x11;
    private short             field_1_iteration;

    public IterationRecord()
    {
    }

    /**
     * Constructs an Iteration record and sets its fields appropriately.
     *
     * @param id     id must be 0x11 or an exception will be throw upon validation
     * @param size  the size of the data area of the record
     * @param data  data of the record (should not contain sid/len)
     */

    public IterationRecord(short id, short size, byte [] data)
    {
        super(id, size, data);
    }

    /**
     * Constructs an Iteration record and sets its fields appropriately.
     *
     * @param id     id must be 0x11 or an exception will be throw upon validation
     * @param size  the size of the data area of the record
     * @param data  data of the record (should not contain sid/len)
     * @param offset of the record's data
     */

    public IterationRecord(short id, short size, byte [] data, int offset)
    {
        super(id, size, data, offset);
    }

    protected void validateSid(short id)
    {
        if (id != sid)
        {
            throw new RecordFormatException("NOT An ITERATION RECORD");
        }
    }

    protected void fillFields(byte [] data, short size, int offset)
    {
        field_1_iteration = LittleEndian.getShort(data, 0 + offset);
    }

    /**
     * set whether or not to iterate for calculations
     * @param iterate or not
     */

    public void setIteration(boolean iterate)
    {
        if (iterate)
        {
            field_1_iteration = 1;
        }
        else
        {
            field_1_iteration = 0;
        }
    }

    /**
     * get whether or not to iterate for calculations
     *
     * @return whether iterative calculations are turned off or on
     */

    public boolean getIteration()
    {
        return (field_1_iteration == 1);
    }

    public String toString()
    {
        StringBuffer buffer = new StringBuffer();

        buffer.append("[ITERATION]\n");
        buffer.append("    .iteration      = ").append(getIteration())
            .append("\n");
        buffer.append("[/ITERATION]\n");
        return buffer.toString();
    }

    public int serialize(int offset, byte [] data)
    {
        LittleEndian.putShort(data, 0 + offset, sid);
        LittleEndian.putShort(data, 2 + offset, ( short ) 0x2);
        LittleEndian.putShort(data, 4 + offset, field_1_iteration);
        return getRecordSize();
    }

    public int getRecordSize()
    {
        return 6;
    }

    public short getSid()
    {
        return this.sid;
    }

    public Object clone() {
      IterationRecord rec = new IterationRecord();
      rec.field_1_iteration = field_1_iteration;
      return rec;
    }
}