sstrecord.java

实现JAVA界面的代码GWT

// Decompiled by Jad v1.5.7g. Copyright 2000 Pavel Kouznetsov.
// Jad home page: http://www.geocities.com/SiliconValley/Bridge/8617/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi 
// Source File Name:   SSTRecord.java

package jxl.write.biff;

import java.util.ArrayList;
import java.util.Iterator;
import jxl.biff.*;

class SSTRecord extends WritableRecordData
{

    private int numReferences;
    private int numStrings;
    private ArrayList strings;
    private ArrayList stringLengths;
    private byte data[];
    private int byteCount;
    private static int maxBytes = 8216;

    public SSTRecord(int numRefs, int s)
    {
        super(Type.SST);
        numReferences = numRefs;
        numStrings = s;
        byteCount = 0;
        strings = new ArrayList(50);
        stringLengths = new ArrayList(50);
    }

    public int add(String s)
    {
        int bytes = s.length() * 2 + 3;
        if(byteCount >= maxBytes - 5)
            return s.length() <= 0 ? -1 : s.length();
        stringLengths.add(new Integer(s.length()));
        if(bytes + byteCount < maxBytes)
        {
            strings.add(s);
            byteCount += bytes;
            return 0;
        } else
        {
            int bytesLeft = maxBytes - 3 - byteCount;
            int charsAvailable = bytesLeft % 2 != 0 ? (bytesLeft - 1) / 2 : bytesLeft / 2;
            strings.add(s.substring(0, charsAvailable));
            byteCount += charsAvailable * 2 + 3;
            return s.length() - charsAvailable;
        }
    }

    public int getOffset()
    {
        return byteCount + 8;
    }

    public byte[] getData()
    {
        data = new byte[byteCount + 8];
        IntegerHelper.getFourBytes(numReferences, data, 0);
        IntegerHelper.getFourBytes(numStrings, data, 4);
        int pos = 8;
        int count = 0;
        Iterator i = strings.iterator();
        String s = null;
        int length = 0;
        while(i.hasNext()) 
        {
            s = (String)i.next();
            length = ((Integer)stringLengths.get(count)).intValue();
            IntegerHelper.getTwoBytes(length, data, pos);
            data[pos + 2] = 1;
            StringHelper.getUnicodeBytes(s, data, pos + 3);
            pos += s.length() * 2 + 3;
            count++;
        }
        return data;
    }

}