| /* |
| * Copyright 2002,2004 The Apache Software Foundation. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.commons.jelly.tags.fmt; |
| |
| import org.apache.commons.jelly.JellyTagException; |
| import org.apache.commons.jelly.XMLOutput; |
| import org.apache.commons.jelly.Tag; |
| import org.apache.commons.jelly.TagSupport; |
| import org.apache.commons.jelly.expression.Expression; |
| |
| /** |
| * Support for tag handlers for <param>, the parameter setting |
| * tag in JSTL. |
| * @author <a href="mailto:willievu@yahoo.com">Willie Vu</a> |
| * @version 1.1 |
| * |
| * @task handle body content trimming |
| */ |
| public class ParamTag extends TagSupport { |
| |
| /** Holds value of property value. */ |
| private Expression value; |
| |
| /** Creates a new instance of ParamTag */ |
| public ParamTag() { |
| } |
| |
| /** |
| * Evaluates this tag after all the tags properties have been initialized. |
| * |
| */ |
| public void doTag(XMLOutput output) throws JellyTagException { |
| MessageTag parent = null; |
| Tag t = findAncestorWithClass(this, MessageTag.class); |
| if (t != null) { |
| parent = (MessageTag) t; |
| } else { |
| // must be nested inside a <fmt:message> action. |
| throw new JellyTagException("must be nested inside a <fmt:message> action."); |
| } |
| |
| Object valueInput = null; |
| if (this.value != null) { |
| valueInput = this.value.evaluate(context); |
| } |
| else { |
| // get value from body |
| valueInput = getBodyText(); |
| } |
| |
| parent.addParam(valueInput); |
| } |
| |
| /** Setter for property value. |
| * @param value New value of property value. |
| * |
| */ |
| public void setValue(Expression value) { |
| this.value = value; |
| } |
| |
| } |