/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.pdfbox.examples.pdmodel;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.GregorianCalendar;
import java.util.List;

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDDocumentNameDictionary;
import org.apache.pdfbox.pdmodel.PDEmbeddedFilesNameTreeNode;
import org.apache.pdfbox.pdmodel.PDPage;

import org.apache.pdfbox.pdmodel.common.filespecification.PDComplexFileSpecification;
import org.apache.pdfbox.pdmodel.common.filespecification.PDEmbeddedFile;
import org.apache.pdfbox.pdmodel.PDPageContentStream;

import org.apache.pdfbox.pdmodel.font.PDFont;
import org.apache.pdfbox.pdmodel.font.PDType1Font;

/**
 * This is an example that creates a simple document and embeds a file into it..
 *
 * @author Ben Litchfield
 */
public class EmbeddedFiles
{
    /**
     * Constructor.
     */
    public EmbeddedFiles()
    {
        super();
    }

    /**
     * create the second sample document from the PDF file format specification.
     *
     * @param file The file to write the PDF to.
     *
     * @throws IOException If there is an error writing the data.
     */
    public void doIt( String file) throws IOException
    {
        try ( // the document
                PDDocument doc = new PDDocument())
        {
            PDPage page = new PDPage();
            doc.addPage( page );
            PDFont font = PDType1Font.HELVETICA_BOLD;

            try (PDPageContentStream contentStream = new PDPageContentStream(doc, page))
            {
                contentStream.beginText();
                contentStream.setFont( font, 12 );
                contentStream.newLineAtOffset(100, 700);
                contentStream.showText("Go to Document->File Attachments to View Embedded Files");
                contentStream.endText();
            }

            //embedded files are stored in a named tree
            PDEmbeddedFilesNameTreeNode efTree = new PDEmbeddedFilesNameTreeNode();

            //first create the file specification, which holds the embedded file
            PDComplexFileSpecification fs = new PDComplexFileSpecification();

            // use both methods for backwards, cross-platform and cross-language compatibility.
            fs.setFile( "Test.txt" );
            fs.setFileUnicode("Test.txt");

            //create a dummy file stream, this would probably normally be a FileInputStream
            byte[] data = "This is the contents of the embedded file".getBytes("ISO-8859-1");
            ByteArrayInputStream fakeFile =
                new ByteArrayInputStream( data );
            PDEmbeddedFile ef = new PDEmbeddedFile(doc, fakeFile );
            //now lets some of the optional parameters
            ef.setSubtype( "test/plain" );
            ef.setSize( data.length );
            ef.setCreationDate( new GregorianCalendar() );
            fs.setEmbeddedFile( ef );

            // create a new tree node and add the embedded file 
            PDEmbeddedFilesNameTreeNode treeNode = new PDEmbeddedFilesNameTreeNode();
            treeNode.setNames( Collections.singletonMap( "My first attachment",  fs ) );
            // add the new node as kid to the root node
            List<PDEmbeddedFilesNameTreeNode> kids = new ArrayList<>();
            kids.add(treeNode);
            efTree.setKids(kids);
            // add the tree to the document catalog
            PDDocumentNameDictionary names = new PDDocumentNameDictionary( doc.getDocumentCatalog() );
            names.setEmbeddedFiles( efTree );
            doc.getDocumentCatalog().setNames( names );


            doc.save( file );
        }
    }

    /**
     * This will create a hello world PDF document with an embedded file.
     * <br>
     * see usage() for commandline
     *
     * @param args Command line arguments.
     */
    public static void main(String[] args) throws IOException
    {
        EmbeddedFiles app = new EmbeddedFiles();
        if( args.length != 1 )
        {
            app.usage();
        }
        else
        {
            app.doIt( args[0] );
        }
    }

    /**
     * This will print out a message telling how to use this example.
     */
    private void usage()
    {
        System.err.println( "usage: " + this.getClass().getName() + " <output-file>" );
    }
}

@@ -1231,17 +1231,16 @@
 PDPage;%0A
-%0A
 import o
@@ -1445,16 +1445,58 @@
 Stream;%0A
+import org.apache.pdfbox.pdmodel.PageMode;
 %0Aimport 
@@ -1806,25 +1806,8 @@
   %7B%0A
-        super();%0A
     
@@ -2112,41 +2112,8 @@
 ry (
- // the document%0A                
 PDDo
@@ -3398,32 +3398,16 @@
 keFile =
-%0A               
  new Byt
@@ -3424,22 +3424,20 @@
 tStream(
- 
 data
- 
 );%0A     
@@ -3584,17 +3584,17 @@
 ype( %22te
-s
+x
 t/plain%22
@@ -3699,43 +3699,183 @@
  );%0A
-            fs.setEmbeddedFile( ef 
+%0A            // use both methods for backwards, cross-platform and cross-language compatibility.%0A            fs.setEmbeddedFile( ef );%0A            fs.setEmbeddedFileUnicode(ef
 );%0A%0A
@@ -3937,17 +3937,16 @@
 ded file
- 
 %0A       
@@ -4565,16 +4565,147 @@
 mes );%0A%0A
+            // show attachments panel in some viewers %0A            doc.getDocumentCatalog().setPageMode(PageMode.USE_ATTACHMENTS);%0A
 %0A       

improve example for backwards, cross-platform and cross-language compatibility; improve format; enable show attachments panel; remove typo