1 /*
2 * Copyright 2002 by Matt Benson.
3 *
4 * The contents of this file are subject to the Mozilla Public License Version 1.1
5 * (the "License"); you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at http://www.mozilla.org/MPL/
7 *
8 * Software distributed under the License is distributed on an "AS IS" basis,
9 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
10 * for the specific language governing rights and limitations under the License.
11 *
12 * The Original Code is 'iText, a free JAVA-PDF library'.
13 *
14 * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
15 * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
16 * All Rights Reserved.
17 * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
18 * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
19 *
20 * Contributor(s): all the names of the contributors are added in the source code
21 * where applicable.
22 *
23 * Alternatively, the contents of this file may be used under the terms of the
24 * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
25 * provisions of LGPL are applicable instead of those above. If you wish to
26 * allow use of your version of this file only under the terms of the LGPL
27 * License and not to allow others to use your version of this file under
28 * the MPL, indicate your decision by deleting the provisions above and
29 * replace them with the notice and other provisions required by the LGPL.
30 * If you do not delete the provisions above, a recipient may use your version
31 * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
32 *
33 * This library is free software; you can redistribute it and/or modify it
34 * under the terms of the MPL as stated above or under the terms of the GNU
35 * Library General Public License as published by the Free Software Foundation;
36 * either version 2 of the License, or any later version.
37 *
38 * This library is distributed in the hope that it will be useful, but WITHOUT
39 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
40 * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
41 * details.
42 *
43 * If you didn't download this code from the following link, you should check if
44 * you aren't using an obsolete version:
45 * http://www.lowagie.com/iText/
46 */
47
48 package com.lowagie.text.xml;
49
50
51 import java.lang.reflect.Field;
52 import java.lang.reflect.Modifier;
53 import java.io.InputStream;
54 import java.io.OutputStream;
55
56 import com.lowagie.text.Document;
57 import com.lowagie.text.PageSize;
58 import com.lowagie.text.Rectangle;
59 import com.lowagie.text.DocumentException;
60
61
62 /**
63 * Generates an specific file from an iText XML file.
64 *
65 * @version 1.0
66 * @author <a href="mailto:orangeherbert@users.sourceforge.net">Matt Benson</a>
67 */
68 public abstract class XmlToXXX
69 {
70
71 protected Rectangle pageSize;
72
73
74 /**
75 * Construct an <CODE>XmlToXXX</CODE> with the default page size.
76 */
77 public XmlToXXX()
78 {
79 this(PageSize.LETTER);
80 }//end default constructor
81
82
83 /**
84 * Construct an <CODE>XmlToXXX</CODE> with the specified page size.
85 * @param pageSize <CODE>String</CODE> page size name from
86 * <CODE>com.lowagie.text.PageSize</CODE>.
87 */
88 public XmlToXXX(String pageSize)
89 {
90 this(getPageSize(pageSize));
91 }//end constructor(String)
92
93
94 private XmlToXXX(Rectangle pageSize)
95 {
96 this.pageSize = pageSize;
97 }//end constructor(Rectangle)
98
99
100 /**
101 * Parse the XML from the specified <CODE>InputStream</CODE>, writing to the
102 * specified <CODE>OutputStream</CODE>.
103 * @param in the <CODE>InputStream</CODE> from which the XML is read.
104 * @param out the <CODE>OutputStream</CODE> to which the result is written.
105 * @throws DocumentException if document errors occur.
106 */
107 public final void parse(InputStream in, OutputStream out)
108 throws DocumentException
109 {
110 Document doc = new Document(pageSize);
111
112 addWriter(doc, out);
113 XmlParser.parse(doc, in);
114 }//end parse
115
116
117 private static Rectangle getPageSize(String pageSize)
118 {
119 Rectangle result = PageSize.LETTER;
120 Field fld = null;
121 try
122 {
123 fld = PageSize.class.getDeclaredField(pageSize.toUpperCase());
124 result = (fld != null
125 && Modifier.isStatic(fld.getModifiers())
126 && fld.getType().equals(Rectangle.class)) ? (Rectangle)(fld.get(null))
127 : result;
128 }//end try to get field
129 catch (Exception ex)
130 {
131 System.err.println(ex.getMessage());
132 }//end catch Exception
133 return result;
134 }//end getPageSize
135
136
137 /**
138 * Add a <CODE>DocWriter</CODE> for the specified <CODE>Document</CODE> and
139 * <CODE>OutputStream</CODE>.
140 * @param doc The document to which content will be added
141 * @param out The outputstream to which the document will be sent
142 * @throws DocumentException if document errors occur.
143 */
144 protected abstract void addWriter(Document doc, OutputStream out)
145 throws DocumentException;
146
147 }//end class XmlToXXX
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