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/* StringVisitor.java
Copyright (C) 2006-2008, 2011, 2012 Heiko Oberdiek
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301 USA
This file is part of PDFAnnotExtractor. See README.
*/
package pax;
import java.io.*;
import java.util.*;
import org.pdfbox.cos.*;
import org.pdfbox.exceptions.*;
public class StringVisitor implements ICOSVisitor {
protected StringBuffer buf;
boolean nodelim;
public StringVisitor() {
buf = new StringBuffer();
nodelim = false;
}
public Object visitFromNull(COSNull obj) {
if (nodelim) {
buf.append(' ');
}
buf.append("null");
nodelim = true;
return buf;
}
public Object visitFromBoolean(COSBoolean obj) {
if (nodelim) {
buf.append(' ');
}
buf.append(obj.getValue());
nodelim = true;
return buf;
}
public Object visitFromInt(COSInteger obj) {
if (nodelim) {
buf.append(' ');
}
buf.append(obj.intValue());
nodelim = true;
return buf;
}
public Object visitFromFloat(COSFloat obj) {
if (nodelim) {
buf.append(' ');
}
String s = "" + obj.floatValue();
if (s.endsWith(".0")) {
buf.append(s.substring(0, s.length() - ".0".length()));
}
else {
buf.append(s);
}
nodelim = true;
return buf;
}
public Object visitFromName(COSName obj) {
ByteArrayOutputStream a = new ByteArrayOutputStream();
try {
obj.writePDF(a);
}
catch (IOException e) {}
buf.append(a.toString());
nodelim = true;
return buf;
}
public Object visitFromString(COSString obj) {
buf.append("\\<");
buf.append(obj.getHexString());
buf.append("\\>");
nodelim = false;
return buf;
}
public Object visitFromArray(COSArray obj) throws COSVisitorException {
buf.append('[');
nodelim = false;
for (int i = 0; i < obj.size(); i++) {
obj.getObject(i).accept(this);
}
buf.append(']');
nodelim = false;
return buf;
}
public Object visitFromDictionary(COSDictionary obj) throws COSVisitorException {
buf.append("<<");
nodelim = false;
Iterator iter = obj.keyList().iterator();
while (iter.hasNext()) {
COSName key = (COSName)iter.next();
COSBase value = obj.getDictionaryObject(key);
key.accept(this);
value.accept(this);
}
buf.append(">>");
nodelim = false;
return buf;
}
public Object visitFromStream(COSStream obj) throws COSVisitorException {
throw new COSVisitorException(new Exception("Unsupported stream object"));
}
public Object visitFromDocument(COSDocument obj) throws COSVisitorException {
throw new COSVisitorException(new Exception("Unsupported documetn object"));
}
}
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