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1 /*
2  * ====================================================================
3  *
4  * The Apache Software License, Version 1.1
5  *
6  * Copyright (c) 1999-2003 The Apache Software Foundation. All rights
7  * reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  *
13  * 1. Redistributions of source code must retain the above copyright
14  * notice, this list of conditions and the following disclaimer.
15  *
16  * 2. Redistributions in binary form must reproduce the above copyright
17  * notice, this list of conditions and the following disclaimer in
18  * the documentation and/or other materials provided with the
19  * distribution.
20  *
21  * 3. The end-user documentation included with the redistribution, if
22  * any, must include the following acknowlegement:
23  * "This product includes software developed by the
24  * Apache Software Foundation (http://www.apache.org/)."
25  * Alternately, this acknowlegement may appear in the software itself,
26  * if and wherever such third-party acknowlegements normally appear.
27  *
28  * 4. The names "The Jakarta Project", "Jakarta Element Construction Set",
29  * "Jakarta ECS" , and "Apache Software Foundation" must not be used
30  * to endorse or promote products derived
31  * from this software without prior written permission. For written
32  * permission, please contact apache@apache.org.
33  *
34  * 5. Products derived from this software may not be called "Apache",
35  * "Jakarta Element Construction Set" nor "Jakarta ECS" nor may "Apache"
36  * appear in their names without prior written permission of the Apache Group.
37  *
38  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
39  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
40  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
41  * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
42  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
43  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
44  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
45  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
46  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
47  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
48  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
49  * SUCH DAMAGE.
50  * ====================================================================
51  *
52  * This software consists of voluntary contributions made by many
53  * individuals on behalf of the Apache Software Foundation. For more
54  * information on the Apache Software Foundation, please see
55  * <http://www.apache.org/>.
56  *
57  */
58 package org.apache.ecs;
59
60 import java.io.OutputStream JavaDoc;
61 import java.io.PrintWriter JavaDoc;
62 import java.util.Enumeration JavaDoc;
63 import java.util.Vector JavaDoc;
64
65 /**
66     This class is a Element container class. You can place elements into
67     this class and then you can place this class into other elements in order
68     to combine elements together.
69
70 <code><pre>
71     P p = new P().addElement("foo");
72     P p1 = new P().addElement("bar");
73     ElementContainer ec = new ElementContainer(p).addElement(p1);
74     System.out.println(ec.toString());
75 </pre></code>
76
77     @version $Id: ElementContainer.java,v 1.7 2003/04/27 09:43:24 rdonkin Exp $
78     @author <a HREF="mailto:snagy@servletapi.com">Stephan Nagy</a>
79     @author <a HREF="mailto:jon@clearink.com">Jon S. Stevens</a>
80 */
81 public class ElementContainer extends ConcreteElement implements Printable
82 {
83     /**
84         internal use only
85         @serial ec ec
86     */
87     private Vector JavaDoc ec = new Vector JavaDoc(2);
88     
89     /**
90         Basic constructor
91     */
92     public ElementContainer()
93     {
94     }
95
96     /**
97         Basic constructor
98     */
99     public ElementContainer(Element element)
100     {
101         addElement(element);
102     }
103
104     /**
105         Adds an Element to the element.
106         @param element Adds an Element to the element.
107      */
108     public ElementContainer addElement(Element element)
109     {
110         ec.addElement(element);
111         return(this);
112     }
113     
114     /**
115         Adds an Element to the element.
116         @param element Adds an Element to the element.
117      */
118     public ElementContainer addElement(String JavaDoc element)
119     {
120         ec.addElement(new StringElement(element));
121         return(this);
122     }
123
124     /**
125         Implements the output method in Element
126     */
127     public void output(OutputStream JavaDoc out)
128     {
129         Element element = null;
130         Enumeration JavaDoc data = ec.elements();
131         while ( data.hasMoreElements() )
132         {
133             element = (Element) data.nextElement();
134             element.output(out);
135         }
136     }
137     
138     /**
139         Implements the output method in Element
140     */
141     public void output(PrintWriter JavaDoc out)
142     {
143         Element element = null;
144         Enumeration JavaDoc data = ec.elements();
145         while ( data.hasMoreElements() )
146         {
147             element = (Element) data.nextElement();
148             element.output(out);
149         }
150     }
151     /**
152         returns an enumeration of the elements in this container
153     */
154     public Enumeration JavaDoc elements()
155     {
156         return ec.elements();
157     }
158 }
159
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