Source Code Cross Referenced for FdfReader.java in  » PDF » pdf-itext » com » lowagie » text » pdf » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » PDF » pdf itext » com.lowagie.text.pdf 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright 2003 by Paulo Soares.
003:         *
004:         * The contents of this file are subject to the Mozilla Public License Version 1.1
005:         * (the "License"); you may not use this file except in compliance with the License.
006:         * You may obtain a copy of the License at http://www.mozilla.org/MPL/
007:         *
008:         * Software distributed under the License is distributed on an "AS IS" basis,
009:         * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
010:         * for the specific language governing rights and limitations under the License.
011:         *
012:         * The Original Code is 'iText, a free JAVA-PDF library'.
013:         *
014:         * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
015:         * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
016:         * All Rights Reserved.
017:         * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
018:         * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
019:         *
020:         * Contributor(s): all the names of the contributors are added in the source code
021:         * where applicable.
022:         *
023:         * Alternatively, the contents of this file may be used under the terms of the
024:         * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
025:         * provisions of LGPL are applicable instead of those above.  If you wish to
026:         * allow use of your version of this file only under the terms of the LGPL
027:         * License and not to allow others to use your version of this file under
028:         * the MPL, indicate your decision by deleting the provisions above and
029:         * replace them with the notice and other provisions required by the LGPL.
030:         * If you do not delete the provisions above, a recipient may use your version
031:         * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
032:         *
033:         * This library is free software; you can redistribute it and/or modify it
034:         * under the terms of the MPL as stated above or under the terms of the GNU
035:         * Library General Public License as published by the Free Software Foundation;
036:         * either version 2 of the License, or any later version.
037:         *
038:         * This library is distributed in the hope that it will be useful, but WITHOUT
039:         * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
040:         * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
041:         * details.
042:         *
043:         * If you didn't download this code from the following link, you should check if
044:         * you aren't using an obsolete version:
045:         * http://www.lowagie.com/iText/
046:         */
047:        package com.lowagie.text.pdf;
048:
049:        import java.io.IOException;
050:        import java.io.InputStream;
051:        import java.net.URL;
052:        import java.util.ArrayList;
053:        import java.util.HashMap;
054:
055:        /** Reads an FDF form and makes the fields available
056:         * @author Paulo Soares (psoares@consiste.pt)
057:         */
058:        public class FdfReader extends PdfReader {
059:
060:            HashMap fields;
061:            String fileSpec;
062:            PdfName encoding;
063:
064:            /** Reads an FDF form.
065:             * @param filename the file name of the form
066:             * @throws IOException on error
067:             */
068:            public FdfReader(String filename) throws IOException {
069:                super (filename);
070:            }
071:
072:            /** Reads an FDF form.
073:             * @param pdfIn the byte array with the form
074:             * @throws IOException on error
075:             */
076:            public FdfReader(byte pdfIn[]) throws IOException {
077:                super (pdfIn);
078:            }
079:
080:            /** Reads an FDF form.
081:             * @param url the URL of the document
082:             * @throws IOException on error
083:             */
084:            public FdfReader(URL url) throws IOException {
085:                super (url);
086:            }
087:
088:            /** Reads an FDF form.
089:             * @param is the <CODE>InputStream</CODE> containing the document. The stream is read to the
090:             * end but is not closed
091:             * @throws IOException on error
092:             */
093:            public FdfReader(InputStream is) throws IOException {
094:                super (is);
095:            }
096:
097:            protected void readPdf() throws IOException {
098:                fields = new HashMap();
099:                try {
100:                    tokens.checkFdfHeader();
101:                    rebuildXref();
102:                    readDocObj();
103:                } finally {
104:                    try {
105:                        tokens.close();
106:                    } catch (Exception e) {
107:                        // empty on purpose
108:                    }
109:                }
110:                readFields();
111:            }
112:
113:            protected void kidNode(PdfDictionary merged, String name) {
114:                PdfArray kids = (PdfArray) getPdfObject(merged
115:                        .get(PdfName.KIDS));
116:                if (kids == null || kids.getArrayList().size() == 0) {
117:                    if (name.length() > 0)
118:                        name = name.substring(1);
119:                    fields.put(name, merged);
120:                } else {
121:                    merged.remove(PdfName.KIDS);
122:                    ArrayList ar = kids.getArrayList();
123:                    for (int k = 0; k < ar.size(); ++k) {
124:                        PdfDictionary dic = new PdfDictionary();
125:                        dic.merge(merged);
126:                        PdfDictionary newDic = (PdfDictionary) getPdfObject((PdfObject) ar
127:                                .get(k));
128:                        PdfString t = (PdfString) getPdfObject(newDic
129:                                .get(PdfName.T));
130:                        String newName = name;
131:                        if (t != null)
132:                            newName += "." + t.toUnicodeString();
133:                        dic.merge(newDic);
134:                        dic.remove(PdfName.T);
135:                        kidNode(dic, newName);
136:                    }
137:                }
138:            }
139:
140:            protected void readFields() {
141:                catalog = (PdfDictionary) getPdfObject(trailer
142:                        .get(PdfName.ROOT));
143:                PdfDictionary fdf = (PdfDictionary) getPdfObject(catalog
144:                        .get(PdfName.FDF));
145:                if (fdf == null)
146:                    return;
147:                PdfString fs = (PdfString) getPdfObject(fdf.get(PdfName.F));
148:                if (fs != null)
149:                    fileSpec = fs.toUnicodeString();
150:                PdfArray fld = (PdfArray) getPdfObject(fdf.get(PdfName.FIELDS));
151:                if (fld == null)
152:                    return;
153:                encoding = (PdfName) getPdfObject(fdf.get(PdfName.ENCODING));
154:                PdfDictionary merged = new PdfDictionary();
155:                merged.put(PdfName.KIDS, fld);
156:                kidNode(merged, "");
157:            }
158:
159:            /** Gets all the fields. The map is keyed by the fully qualified
160:             * field name and the value is a merged <CODE>PdfDictionary</CODE>
161:             * with the field content.
162:             * @return all the fields
163:             */
164:            public HashMap getFields() {
165:                return fields;
166:            }
167:
168:            /** Gets the field dictionary.
169:             * @param name the fully qualified field name
170:             * @return the field dictionary
171:             */
172:            public PdfDictionary getField(String name) {
173:                return (PdfDictionary) fields.get(name);
174:            }
175:
176:            /** Gets the field value or <CODE>null</CODE> if the field does not
177:             * exist or has no value defined.
178:             * @param name the fully qualified field name
179:             * @return the field value or <CODE>null</CODE>
180:             */
181:            public String getFieldValue(String name) {
182:                PdfDictionary field = (PdfDictionary) fields.get(name);
183:                if (field == null)
184:                    return null;
185:                PdfObject v = getPdfObject(field.get(PdfName.V));
186:                if (v == null)
187:                    return null;
188:                if (v.isName())
189:                    return PdfName.decodeName(((PdfName) v).toString());
190:                else if (v.isString()) {
191:                    PdfString vs = (PdfString) v;
192:                    if (encoding == null || vs.getEncoding() != null)
193:                        return vs.toUnicodeString();
194:                    byte b[] = vs.getBytes();
195:                    if (b.length >= 2 && b[0] == (byte) 254
196:                            && b[1] == (byte) 255)
197:                        return vs.toUnicodeString();
198:                    try {
199:                        if (encoding.equals(PdfName.SHIFT_JIS))
200:                            return new String(b, "SJIS");
201:                        else if (encoding.equals(PdfName.UHC))
202:                            return new String(b, "MS949");
203:                        else if (encoding.equals(PdfName.GBK))
204:                            return new String(b, "GBK");
205:                        else if (encoding.equals(PdfName.BIGFIVE))
206:                            return new String(b, "Big5");
207:                    } catch (Exception e) {
208:                    }
209:                    return vs.toUnicodeString();
210:                }
211:                return null;
212:            }
213:
214:            /** Gets the PDF file specification contained in the FDF.
215:             * @return the PDF file specification contained in the FDF
216:             */
217:            public String getFileSpec() {
218:                return fileSpec;
219:            }
220:        }
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