1/*
2 * Copyright (c) 2005, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package com.sun.xml.internal.txw2;
27
28import com.sun.xml.internal.txw2.output.XmlSerializer;
29import com.sun.xml.internal.txw2.output.TXWSerializer;
30import com.sun.xml.internal.txw2.annotation.XmlElement;
31import com.sun.xml.internal.txw2.annotation.XmlNamespace;
32
33import javax.xml.namespace.QName;
34
35/**
36 * Entry point to TXW.
37 *
38 * @author Kohsuke Kawaguchi
39 */
40public abstract class TXW {
41    private TXW() {}    // no instanciation please
42
43
44    /*package*/ static QName getTagName( Class<?> c ) {
45        String localName="";
46        String nsUri="##default";
47
48        XmlElement xe = c.getAnnotation(XmlElement.class);
49        if(xe!=null) {
50            localName = xe.value();
51            nsUri = xe.ns();
52        }
53
54        if(localName.length()==0) {
55            localName = c.getName();
56            int idx = localName.lastIndexOf('.');
57            if(idx>=0)
58                localName = localName.substring(idx+1);
59
60            localName = Character.toLowerCase(localName.charAt(0))+localName.substring(1);
61        }
62
63        if(nsUri.equals("##default")) {
64            Package pkg = c.getPackage();
65            if(pkg!=null) {
66                XmlNamespace xn = pkg.getAnnotation(XmlNamespace.class);
67                if(xn!=null)
68                    nsUri = xn.value();
69            }
70        }
71        if(nsUri.equals("##default"))
72            nsUri = "";
73
74        return new QName(nsUri,localName);
75    }
76
77    /**
78     * Creates a new {@link TypedXmlWriter} to write a new instance of a document.
79     *
80     * @param rootElement
81     *      The {@link TypedXmlWriter} interface that declares the content model of the root element.
82     *      This interface must have {@link XmlElement} annotation on it to designate the tag name
83     *      of the root element.
84     * @param out
85     *      The target of the writing.
86     */
87    public static <T extends TypedXmlWriter> T create( Class<T> rootElement, XmlSerializer out ) {
88        if (out instanceof TXWSerializer) {
89            TXWSerializer txws = (TXWSerializer) out;
90            return txws.txw._element(rootElement);
91        }
92
93        Document doc = new Document(out);
94        QName n = getTagName(rootElement);
95        return new ContainerElement(doc,null,n.getNamespaceURI(),n.getLocalPart())._cast(rootElement);
96    }
97
98    /**
99     * Creates a new {@link TypedXmlWriter} to write a new instance of a document.
100     *
101     * <p>
102     * Similar to the other method, but this version allows the caller to set the
103     * tag name at the run-time.
104     *
105     * @param tagName
106     *      The tag name of the root document.
107     *
108     * @see #create(Class,XmlSerializer)
109     */
110    public static <T extends TypedXmlWriter> T create( QName tagName, Class<T> rootElement, XmlSerializer out ) {
111        if (out instanceof TXWSerializer) {
112            TXWSerializer txws = (TXWSerializer) out;
113            return txws.txw._element(tagName,rootElement);
114        }
115        return new ContainerElement(new Document(out),null,tagName.getNamespaceURI(),tagName.getLocalPart())._cast(rootElement);
116    }
117}
118