| /* ==================================================================== |
| * 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 |
| * are met: |
| * |
| * 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 |
| * written permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * "Apache POI", nor may "Apache" appear in their name, without |
| * prior written permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * 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.LittleEndianConsts; |
| import org.apache.poi.util.LittleEndian; |
| |
| /** |
| * Process a single record. That is, an SST record or a continue record. |
| * Refactored from code originally in SSTRecord. |
| * |
| * @author Glen Stampoultzis (glens at apache.org) |
| */ |
| class RecordProcessor |
| { |
| private byte[] data; |
| private int recordOffset; |
| private int available; |
| private SSTRecordHeader sstRecordHeader; |
| |
| public RecordProcessor( byte[] data, int available, int numStrings, int numUniqueStrings ) |
| { |
| this.data = data; |
| this.available = available; |
| this.sstRecordHeader = new SSTRecordHeader(numStrings, numUniqueStrings); |
| } |
| |
| public int getAvailable() |
| { |
| return available; |
| } |
| |
| public void writeRecordHeader( int offset, int totalWritten, int recordLength, boolean first_record ) |
| { |
| if ( first_record ) |
| { |
| available -= 8; |
| recordOffset = sstRecordHeader.writeSSTHeader( data, recordOffset + offset + totalWritten, recordLength ); |
| } |
| else |
| { |
| recordOffset = writeContinueHeader( data, recordOffset + offset + totalWritten, recordLength ); |
| } |
| } |
| |
| public byte[] writeStringRemainder( boolean lastStringCompleted, byte[] stringreminant, int offset, int totalWritten ) |
| { |
| if ( !lastStringCompleted ) |
| { |
| // write reminant -- it'll all fit neatly |
| System.arraycopy( stringreminant, 0, data, recordOffset + offset + totalWritten, stringreminant.length ); |
| adjustPointers( stringreminant.length ); |
| } |
| else |
| { |
| // write as much of the remnant as possible |
| System.arraycopy( stringreminant, 0, data, recordOffset + offset + totalWritten, available ); |
| byte[] leftover = new byte[( stringreminant.length - available ) + LittleEndianConsts.BYTE_SIZE]; |
| |
| System.arraycopy( stringreminant, available, leftover, LittleEndianConsts.BYTE_SIZE, stringreminant.length - available ); |
| leftover[0] = stringreminant[0]; |
| stringreminant = leftover; |
| adjustPointers( available ); // Consume all available remaining space |
| } |
| return stringreminant; |
| } |
| |
| public void writeWholeString( UnicodeString unistr, int offset, int totalWritten ) |
| { |
| unistr.serialize( recordOffset + offset + totalWritten, data ); |
| int rsize = unistr.getRecordSize(); |
| adjustPointers( rsize ); |
| } |
| |
| public byte[] writePartString( UnicodeString unistr, int offset, int totalWritten ) |
| { |
| byte[] stringReminant; |
| byte[] ucs = unistr.serialize(); |
| |
| System.arraycopy( ucs, 0, data, recordOffset + offset + totalWritten, available ); |
| stringReminant = new byte[( ucs.length - available ) + LittleEndianConsts.BYTE_SIZE]; |
| System.arraycopy( ucs, available, stringReminant, LittleEndianConsts.BYTE_SIZE, ucs.length - available ); |
| stringReminant[0] = ucs[LittleEndianConsts.SHORT_SIZE]; |
| available = 0; |
| return stringReminant; |
| } |
| |
| |
| private int writeContinueHeader( final byte[] data, final int pos, |
| final int recsize ) |
| { |
| int offset = pos; |
| |
| LittleEndian.putShort( data, offset, ContinueRecord.sid ); |
| offset += LittleEndianConsts.SHORT_SIZE; |
| LittleEndian.putShort( data, offset, (short) ( recsize ) ); |
| offset += LittleEndianConsts.SHORT_SIZE; |
| return offset - pos; |
| } |
| |
| |
| private void adjustPointers( int amount ) |
| { |
| recordOffset += amount; |
| available -= amount; |
| } |
| |
| public int getRecordOffset() |
| { |
| return recordOffset; |
| } |
| } |
| |