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-rw-r--r--macros/latex/contrib/pax/source/src/StringVisitor.java131
1 files changed, 131 insertions, 0 deletions
diff --git a/macros/latex/contrib/pax/source/src/StringVisitor.java b/macros/latex/contrib/pax/source/src/StringVisitor.java
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+++ b/macros/latex/contrib/pax/source/src/StringVisitor.java
@@ -0,0 +1,131 @@
+/* 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.apache.pdfbox.cos.*;
+import org.apache.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"));
+ }
+}