165 lines
5.1 KiB
Java
165 lines
5.1 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.util.LittleEndian;
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import org.apache.poi.util.StringUtil;
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/**
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* Supports the STRING record structure. (0x0207)
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*
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* @author Glen Stampoultzis (glens at apache.org)
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*/
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public class StringRecord extends Record {
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public final static short sid = 0x0207;
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private int field_1_string_length;
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private byte field_2_unicode_flag;
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private String field_3_string;
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public StringRecord()
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{
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}
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/**
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* @param in the RecordInputstream to read the record from
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*/
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public StringRecord( RecordInputStream in)
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{
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field_1_string_length = in.readShort();
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field_2_unicode_flag = in.readByte();
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byte[] data = in.readRemainder();
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//Why isn't this using the in.readString methods???
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if (isUnCompressedUnicode())
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{
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field_3_string = StringUtil.getFromUnicodeLE(data, 0, field_1_string_length );
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}
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else
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{
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field_3_string = StringUtil.getFromCompressedUnicode(data, 0, field_1_string_length);
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}
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}
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public void processContinueRecord(byte[] data) {
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if(isUnCompressedUnicode()) {
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field_3_string += StringUtil.getFromUnicodeLE(data, 0, field_1_string_length - field_3_string.length());
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} else {
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field_3_string += StringUtil.getFromCompressedUnicode(data, 0, field_1_string_length - field_3_string.length());
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}
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}
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private int getStringByteLength()
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{
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return isUnCompressedUnicode() ? field_1_string_length * 2 : field_1_string_length;
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}
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public int getRecordSize()
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{
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return 4 + 2 + 1 + getStringByteLength();
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}
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/**
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* is this uncompressed unicode (16bit)? Or just 8-bit compressed?
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* @return isUnicode - True for 16bit- false for 8bit
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*/
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public boolean isUnCompressedUnicode()
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{
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return (field_2_unicode_flag == 1);
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}
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/**
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* called by the class that is responsible for writing this sucker.
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* Subclasses should implement this so that their data is passed back in a
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* byte array.
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*
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* @param offset to begin writing at
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* @param data byte array containing instance data
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* @return number of bytes written
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*/
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public int serialize( int offset, byte[] data )
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{
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LittleEndian.putUShort(data, 0 + offset, sid);
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LittleEndian.putUShort(data, 2 + offset, 3 + getStringByteLength());
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LittleEndian.putUShort(data, 4 + offset, field_1_string_length);
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data[6 + offset] = field_2_unicode_flag;
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if (isUnCompressedUnicode())
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{
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StringUtil.putUnicodeLE(field_3_string, data, 7 + offset);
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}
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else
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{
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StringUtil.putCompressedUnicode(field_3_string, data, 7 + offset);
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}
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return getRecordSize();
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}
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/**
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* return the non static version of the id for this record.
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*/
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public short getSid()
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{
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return sid;
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}
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/**
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* @return The string represented by this record.
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*/
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public String getString()
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{
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return field_3_string;
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}
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/**
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* Sets whether the string is compressed or not
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* @param unicode_flag 1 = uncompressed, 0 = compressed
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*/
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public void setCompressedFlag( byte unicode_flag )
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{
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this.field_2_unicode_flag = unicode_flag;
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}
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/**
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* Sets the string represented by this record.
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*/
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public void setString( String string )
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{
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this.field_1_string_length = string.length();
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this.field_3_string = string;
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setCompressedFlag(StringUtil.hasMultibyte(string) ? (byte)1 : (byte)0);
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}
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public String toString()
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{
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StringBuffer buffer = new StringBuffer();
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buffer.append("[STRING]\n");
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buffer.append(" .string = ")
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.append(field_3_string).append("\n");
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buffer.append("[/STRING]\n");
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return buffer.toString();
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}
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public Object clone() {
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StringRecord rec = new StringRecord();
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rec.field_1_string_length = this.field_1_string_length;
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rec.field_2_unicode_flag= this.field_2_unicode_flag;
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rec.field_3_string = this.field_3_string;
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return rec;
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}
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}
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