SDF

1//---------------------------------------------------------------------------------------
2// Copyright (c) 2001-2019 by PDFTron Systems Inc. All Rights Reserved.
3// Consult legal.txt regarding legal and license information.
4//---------------------------------------------------------------------------------------
5
6package com.pdftron.android.pdfnetsdksamples.samples;
7
8import com.pdftron.android.pdfnetsdksamples.OutputListener;
9import com.pdftron.android.pdfnetsdksamples.PDFNetSample;
10import com.pdftron.android.pdfnetsdksamples.R;
11import com.pdftron.android.pdfnetsdksamples.util.Utils;
12import com.pdftron.filters.FilterReader;
13import com.pdftron.filters.MappedFile;
14import com.pdftron.sdf.DictIterator;
15import com.pdftron.sdf.Obj;
16import com.pdftron.sdf.SDFDoc;
17
18import java.util.ArrayList;
19
20public class SDFTest extends PDFNetSample {
21
22	private static OutputListener mOutputListener;
23
24	private static ArrayList<String> mFileList = new ArrayList<>();
25
26    public SDFTest() {
27        setTitle(R.string.sample_sdf_title);
28        setDescription(R.string.sample_sdf_description);
29    }
30
31	@Override
32	public void run(OutputListener outputListener) {
33		super.run(outputListener);
34		mOutputListener = outputListener;
35		mFileList.clear();
36		printHeader(outputListener);
37
38        try {
39            mOutputListener.println("Opening the test file...");
40
41            // Here we create a SDF/Cos document directly from PDF file. In case you have
42            // PDFDoc you can always access SDF/Cos document using PDFDoc.GetSDFDoc() method.
43            SDFDoc doc = new SDFDoc((Utils.getAssetTempFile(INPUT_PATH + "fish.pdf").getAbsolutePath()));
44            doc.initSecurityHandler();
45
46            mOutputListener.println("Modifying info dictionary, adding custom properties, embedding a stream...");
47            Obj trailer = doc.getTrailer();            // Get the trailer
48
49            // Now we will change PDF document information properties using SDF API
50
51            // Get the Info dictionary.
52            DictIterator itr = trailer.find("Info");
53            Obj info;
54            if (itr.hasNext()) {
55                info = itr.value();
56                // Modify 'Producer' entry.
57                info.putString("Producer", "PDFTron PDFNet");
58
59                // Read title entry (if it is present)
60                itr = info.find("Author");
61                if (itr.hasNext()) {
62                    String oldstr = itr.value().getAsPDFText();
63
64                    info.putText("Author", oldstr + "- Modified");
65                } else {
66                    info.putString("Author", "Me, myself, and I");
67                }
68            } else {
69                // Info dict is missing.
70                info = trailer.putDict("Info");
71                info.putString("Producer", "PDFTron PDFNet");
72                info.putString("Title", "My document");
73            }
74
75            // Create a custom inline dictionary within Info dictionary
76            Obj custom_dict = info.putDict("My Direct Dict");
77            custom_dict.putNumber("My Number", 100);     // Add some key/value pairs
78            custom_dict.putArray("My Array");
79
80            // Create a custom indirect array within Info dictionary
81            Obj custom_array = doc.createIndirectArray();
82            info.put("My Indirect Array", custom_array);    // Add some entries
83
84            // Create indirect link to root
85            custom_array.pushBack(trailer.get("Root").value());
86
87            // Embed a custom stream (file mystream.txt).
88            MappedFile embed_file = new MappedFile(Utils.getAssetTempFile(INPUT_PATH + "my_stream.txt").getAbsolutePath());
89            FilterReader mystm = new FilterReader(embed_file);
90            custom_array.pushBack(doc.createIndirectStream(mystm));
91
92            // Save the changes.
93            mOutputListener.println("Saving modified test file...");
94            doc.save(Utils.createExternalFile("sdftest_out.pdf", mFileList).getAbsolutePath(), SDFDoc.SaveMode.NO_FLAGS, null, "%PDF-1.4");
95            doc.close();
96
97            mOutputListener.println("Test completed.");
98        } catch (Exception e) {
99            mOutputListener.printError(e.getStackTrace());
100        }
101
102		for (String file : mFileList) {
103			addToFileList(file);
104		}
105		printFooter(outputListener);
106	}
107
108}