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Java > Open Source Codes > com > lowagie > text > xml > XmlToXXX


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
148
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