001    // Copyright 2004, 2005 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry.components;
016    
017    import org.apache.hivemind.ApplicationRuntimeException;
018    import org.apache.tapestry.AbstractComponent;
019    import org.apache.tapestry.IMarkupWriter;
020    import org.apache.tapestry.IRequestCycle;
021    
022    /**
023     * A component that can substitute for any HTML element. [<a
024     * href="../../../../../ComponentReference/Any.html">Component Reference</a>]
025     * 
026     * @author Howard Lewis Ship
027     */
028    
029    public abstract class Any extends AbstractComponent
030    {
031        protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle)
032        {
033            String element = getElement();
034    
035            if (element == null)
036                throw new ApplicationRuntimeException(ComponentMessages.anyElementNotDefined(), this,
037                        null, null);
038    
039            boolean rewinding = cycle.isRewinding();
040    
041            if (!rewinding)
042            {
043                writer.begin(element);
044    
045                renderInformalParameters(writer, cycle);
046            }
047    
048            renderBody(writer, cycle);
049    
050            if (!rewinding)
051            {
052                writer.end(element);
053            }
054    
055        }
056    
057        public abstract String getElement();
058    }