/*
* $Header: /home/cvs/jakarta-commons-sandbox/jelly/src/java/org/apache/commons/jelly/tags/define/DynamicTag.java,v 1.10 2002/07/10 21:46:18 jvanzyl Exp $
* $Revision: 1.10 $
* $Date: 2002/07/10 21:46:18 $
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999-2002 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Commons", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* $Id: DynamicTag.java,v 1.10 2002/07/10 21:46:18 jvanzyl Exp $
*/
package org.apache.commons.jelly.impl;
import java.util.HashMap;
import java.util.Map;
import org.apache.commons.jelly.JellyContext;
import org.apache.commons.jelly.DynaTag;
import org.apache.commons.jelly.Script;
import org.apache.commons.jelly.TagSupport;
import org.apache.commons.jelly.XMLOutput;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* <p><code>DynamicTag</code> is a tag that is created from
* inside a Jelly script as a Jelly template and will invoke a
* given script, passing in its instantiation attributes
* as variables and will allow the template to invoke its instance body.</p>
*
* @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
* @version $Revision: 1.10 $
*/
public class DynamicTag extends TagSupport implements DynaTag {
/** The Log to which logging calls will be made. */
private static final Log log = LogFactory.getLog(DynamicTag.class);
/** The template script */
private Script template;
/** The instance attributes */
private Map attributes = new HashMap();
public DynamicTag() {
}
public DynamicTag(Script template) {
this.template = template;
}
// Tag interface
//-------------------------------------------------------------------------
public void doTag(XMLOutput output) throws Exception {
if ( log.isDebugEnabled() ) {
log.debug("Invoking dynamic tag with attributes: " + attributes);
}
attributes.put("org.apache.commons.jelly.body", getBody());
// create new context based on current attributes
JellyContext newJellyContext = context.newJellyContext(attributes);
getTemplate().run(newJellyContext, output);
}
// DynaTag interface
//-------------------------------------------------------------------------
public void setAttribute(String name, Object value) {
attributes.put(name, value);
}
// Properties
//-------------------------------------------------------------------------
/** The template to be executed by this tag which may well
* invoke this instances body from inside the template
*/
public Script getTemplate() {
return template;
}
public void setTemplate(Script template) {
this.template = template;
}
}