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
015package org.apache.tapestry.components;
016
017import org.apache.hivemind.ApplicationRuntimeException;
018import org.apache.tapestry.AbstractComponent;
019import org.apache.tapestry.IMarkupWriter;
020import 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
029public 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}