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Java > Open Source Codes > org > enhydra > apache > html > dom > HTMLDOMImplementationImpl


1 /*
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47  * SUCH DAMAGE.
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50  * This software consists of voluntary contributions made by many
51  * individuals on behalf of the Apache Software Foundation and was
52  * originally based on software copyright (c) 1999, International
53  * Business Machines, Inc., http://www.apache.org. For more
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55  * <http://www.apache.org/>.
56  */
57 package org.enhydra.apache.html.dom;
58     
59
60 import org.enhydra.apache.xerces.dom.DOMImplementationImpl;
61 import org.w3c.dom.DOMException JavaDoc;
62 import org.w3c.dom.html.HTMLDOMImplementation;
63 import org.w3c.dom.html.HTMLDocument;
64
65
66 /**
67  * Provides number of methods for performing operations that are independent
68  * of any particular instance of the document object model. This class is
69  * unconstructable, the only way to obtain an instance of a DOM implementation
70  * is by calling the static method {@link #getDOMImplementation}.
71  *
72  * @version $Revision: 1.2 $ $Date: 2005/01/26 08:28:44 $
73  * @author <a HREF="mailto:arkin@exoffice.com">Assaf Arkin</a>
74  * @see org.w3c.dom.DOMImplementation
75  */
76 public class HTMLDOMImplementationImpl
77     extends DOMImplementationImpl
78     implements HTMLDOMImplementation
79 {
80
81
82     /**
83      * Holds a reference to the single instance of the DOM implementation.
84      * Only one instance is required since this class is multiple entry.
85      */
86     private static HTMLDOMImplementation _instance = new HTMLDOMImplementationImpl();
87
88
89     /**
90      * Private constructor assures that an object of this class cannot
91      * be created. The only way to obtain an object is by calling {@link
92      * #getDOMImplementation}.
93      */
94     private HTMLDOMImplementationImpl()
95     {
96     }
97
98
99     /**
100      * Create a new HTML document of the specified <TT>TITLE</TT> text.
101      *
102      * @param title The document title text
103      * @return New HTML document
104      */
105     public final HTMLDocument createHTMLDocument( String JavaDoc title )
106         throws DOMException JavaDoc
107     {
108     HTMLDocument doc;
109
110     if ( title == null )
111         throw new NullPointerException JavaDoc( "HTM014 Argument 'title' is null." );
112     doc = new HTMLDocumentImpl();
113     doc.setTitle( title );
114     return doc;
115     }
116
117
118     /**
119      * Returns an instance of a {@link HTMLDOMImplementation} that can be
120      * used to perform operations that are not specific to a particular
121      * document instance, e.g. to create a new document.
122      *
123      * @return Reference to a valid DOM implementation
124      */
125     public static HTMLDOMImplementation getHTMLDOMImplementation()
126     {
127     return _instance;
128     }
129
130
131 }
132
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