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Java > Open Source Codes > com > lowagie > text > pdf > collection > PdfCollectionSort


1 package com.lowagie.text.pdf.collection;
2
3 import com.lowagie.text.pdf.PdfArray;
4 import com.lowagie.text.pdf.PdfBoolean;
5 import com.lowagie.text.pdf.PdfDictionary;
6 import com.lowagie.text.pdf.PdfName;
7 import com.lowagie.text.pdf.PdfObject;
8
9 public class PdfCollectionSort extends PdfDictionary {
10     
11     /**
12      * Constructs a PDF Collection Sort Dictionary.
13      * @param key the key of the field that will be used to sort entries
14      */
15     public PdfCollectionSort(String JavaDoc key) {
16         super(PdfName.COLLECTIONSORT);
17         put(PdfName.S, new PdfName(key));
18     }
19     
20     /**
21      * Constructs a PDF Collection Sort Dictionary.
22      * @param keys the keys of the fields that will be used to sort entries
23      */
24     public PdfCollectionSort(String JavaDoc[] keys) {
25         super(PdfName.COLLECTIONSORT);
26         PdfArray array = new PdfArray();
27         for (int i = 0; i < keys.length; i++) {
28             array.add(new PdfName(keys[i]));
29         }
30         put(PdfName.S, array);
31     }
32     
33     /**
34      * Defines the sort order of the field (ascending or descending).
35      * @param ascending true is the default, use false for descending order
36      */
37     public void setSortOrder(boolean ascending) {
38         PdfObject o = (PdfObject)get(PdfName.S);
39         if (o instanceof PdfName) {
40             put(PdfName.A, new PdfBoolean(ascending));
41         }
42         else {
43             throw new IllegalArgumentException JavaDoc("You have to define a boolean array for this collection sort dictionary.");
44         }
45     }
46     
47     /**
48      * Defines the sort order of the field (ascending or descending).
49      * @param ascending an array with every element corresponding with a name of a field.
50      */
51     public void setSortOrder(boolean[] ascending) {
52         PdfObject o = (PdfObject)get(PdfName.S);
53         if (o instanceof PdfArray) {
54             if (((PdfArray)o).size() != ascending.length) {
55                 throw new IllegalArgumentException JavaDoc("The number of booleans in this array doesn't correspond with the number of fields.");
56             }
57             PdfArray array = new PdfArray();
58             for (int i = 0; i < ascending.length; i++) {
59                 array.add(new PdfBoolean(ascending[i]));
60             }
61             put(PdfName.A, array);
62         }
63         else {
64             throw new IllegalArgumentException JavaDoc("You need a single boolean for this collection sort dictionary.");
65         }
66     }
67     
68     
69 }
70
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