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1 package org.faceless.pdf;
2
3 import java.util.WeakHashMap  ;
4 import java.lang.ref.*;
5
6 abstract class PeeredObject
7 {
8 private static final WeakHashMap map = new WeakHashMap ();
9
10 PeeredObject() {}
11
12 abstract Object getPeer();
13
14 static final Object getPeer(Object newobject)
15 {
16 if (newobject==null) return null;
17 Object oldobject = map.get(newobject);
18 if (oldobject!=null) {
19 return ((Reference)oldobject).get();
20 } else {
21 if (newobject instanceof org.faceless.pdf2.PDFPage) {
22 oldobject=new PDFPage((org.faceless.pdf2.PDFPage)newobject);
23 } else if (newobject instanceof org.faceless.pdf2.PDFAction) {
24 oldobject=new PDFAction((org.faceless.pdf2.PDFAction)newobject);
25 } else if (newobject instanceof org.faceless.pdf2.PDFAnnotation) {
26 oldobject=new PDFAnnotation((org.faceless.pdf2.PDFAnnotation)newobject);
27 } else if (newobject instanceof org.faceless.pdf2.PDFFont) {
28 oldobject=new PDFFont((org.faceless.pdf2.PDFFont)newobject);
29 } else if (newobject instanceof org.faceless.pdf2.PDFStyle) {
30 oldobject=new PDFStyle((org.faceless.pdf2.PDFStyle)newobject);
31 } else if (newobject instanceof org.faceless.pdf2.PDFImage) {
32 oldobject=new PDFImage((org.faceless.pdf2.PDFImage)newobject);
33 } else if (newobject instanceof org.faceless.pdf2.PDFPattern) {
34 oldobject=new ColorPattern((org.faceless.pdf2.PDFPattern)newobject);
35 } else if (newobject instanceof org.faceless.pdf2.PDFBookmark) {
36 oldobject=new PDFBookmark((org.faceless.pdf2.PDFBookmark)newobject);
37 } else if (newobject instanceof org.faceless.pdf2.FormButton) {
38 oldobject=new FormButton((org.faceless.pdf2.FormButton)newobject);
39 } else if (newobject instanceof org.faceless.pdf2.FormText) {
40 oldobject=new FormText((org.faceless.pdf2.FormText)newobject);
41 } else if (newobject instanceof org.faceless.pdf2.FormRadioButton) {
42 oldobject=new FormRadioButton((org.faceless.pdf2.FormRadioButton)newobject);
43 } else if (newobject instanceof org.faceless.pdf2.FormCheckbox) {
44 oldobject=new FormCheckbox((org.faceless.pdf2.FormCheckbox)newobject);
45 } else if (newobject instanceof org.faceless.pdf2.FormSignature) {
46 oldobject=new FormSignature((org.faceless.pdf2.FormSignature)newobject);
47 } else if (newobject instanceof org.faceless.pdf2.FormChoice) {
48 oldobject=new FormChoice((org.faceless.pdf2.FormChoice)newobject);
49 } else if (newobject instanceof org.faceless.pdf2.Form) {
50 oldobject=new Form((org.faceless.pdf2.Form)newobject);
51 } else if (newobject instanceof org.faceless.pdf2.PDFSound) {
52 oldobject=new PDFSound((org.faceless.pdf2.PDFSound)newobject);
53 } else if (newobject instanceof org.faceless.pdf2.LayoutBox.Text) {
54 oldobject=new LayoutBox.Text((org.faceless.pdf2.LayoutBox.Text)newobject);
55 } else if (newobject instanceof org.faceless.pdf2.LayoutBox.Box) {
56 oldobject=new LayoutBox.Box((org.faceless.pdf2.LayoutBox.Box)newobject);
57 } else if (newobject instanceof org.faceless.pdf2.LayoutBox) {
58 oldobject=new LayoutBox((org.faceless.pdf2.LayoutBox)newobject);
59 } else {
60 throw new Error ("Unknown peer class "+newobject.getClass());
61 }
62 map.put(newobject, new WeakReference(oldobject));
63 }
64 return oldobject;
65 }
66
67 public String toString()
68 {
69 return getPeer().toString();
70 }
71 }
72 |
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