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- /* ====================================================================
- Copyright 2002-2004 Apache Software Foundation
-
- Licensed 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.hwpf.model;
-
-
- import java.io.UnsupportedEncodingException;
- /**
- * Lightweight representation of a text piece.
- *
- * @author Ryan Ackley
- */
-
- public class TextPiece extends PropertyNode implements Comparable
- {
- private boolean _usesUnicode;
-
- private PieceDescriptor _pd;
-
- private int _cpStart;
-
- /**
- * @param start Offset in main document stream.
- * @param length The total length of the text in bytes. Note: 1 character
- * does not necessarily refer to 1 byte.
- * @param unicode true if this text is unicode.
- */
- public TextPiece(int start, int end, byte[] text, PieceDescriptor pd, int cpStart)
- throws UnsupportedEncodingException
- {
- /** start - end is length on file. This is double the expected when its
- * unicode.*/
- super(start, end, new StringBuffer(new String(text, pd.isUnicode() ? "UTF-16LE" : "Cp1252")));
- _usesUnicode = pd.isUnicode();
- _pd = pd;
- _cpStart = cpStart;
- }
- /**
- * @return If this text piece uses unicode
- */
- public boolean usesUnicode()
- {
- return _usesUnicode;
- }
-
- public PieceDescriptor getPieceDescriptor()
- {
- return _pd;
- }
-
- public StringBuffer getStringBuffer()
- {
- return (StringBuffer)_buf;
- }
-
- public byte[] getRawBytes()
- {
- try
- {
- return ((StringBuffer)_buf).toString().getBytes(_usesUnicode ?
- "UTF-16LE" : "Cp1252");
- }
- catch (UnsupportedEncodingException ignore)
- {
- // shouldn't ever happen considering we wouldn't have been able to
- // create the StringBuffer w/o getting this exception
- return ((StringBuffer)_buf).toString().getBytes();
- }
-
- }
-
- public String substring(int start, int end)
- {
- int denominator = _usesUnicode ? 2 : 1;
-
- return ((StringBuffer)_buf).substring(start/denominator, end/denominator);
- }
-
- public void adjustForDelete(int start, int length)
- {
-
- }
-
- public int characterLength()
- {
- return (getEnd() - getStart()) / (_usesUnicode ? 2 : 1);
- }
-
- public boolean equals(Object o)
- {
- if (limitsAreEqual(o))
- {
- TextPiece tp = (TextPiece)o;
- return getStringBuffer().toString().equals(tp.getStringBuffer().toString()) &&
- tp._usesUnicode == _usesUnicode && _pd.equals(tp._pd);
- }
- return false;
- }
-
-
- public int getCP()
- {
- return _cpStart;
- }
-
- }
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