| /* |
| * 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.bsf; |
| |
| import java.util.Iterator; |
| |
| import org.apache.commons.jelly.JellyTagException; |
| import org.apache.commons.jelly.LocationAware; |
| import org.apache.commons.jelly.MissingAttributeException; |
| import org.apache.commons.jelly.TagSupport; |
| import org.apache.commons.jelly.XMLOutput; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| import org.apache.bsf.BSFEngine; |
| import org.apache.bsf.BSFManager; |
| import org.apache.bsf.BSFException; |
| |
| /** |
| * A tag which evaluates its body using the current scripting language |
| * |
| * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> |
| * @version $Revision: 1.5 $ |
| */ |
| public class ScriptTag extends TagSupport implements LocationAware { |
| |
| /** The Log to which logging calls will be made. */ |
| private static final Log log = LogFactory.getLog(ScriptTag.class.getName() + ".evaluating"); |
| |
| private BSFEngine engine; |
| private BSFManager manager; |
| private String elementName; |
| private String fileName; |
| private int columnNumber; |
| private int lineNumber; |
| |
| public ScriptTag(BSFEngine engine, BSFManager manager) { |
| this.engine = engine; |
| this.manager = manager; |
| } |
| |
| // Tag interface |
| //------------------------------------------------------------------------- |
| public void doTag(XMLOutput output) throws MissingAttributeException, JellyTagException { |
| String text = getBodyText(); |
| |
| log.debug(text); |
| |
| // XXXX: unfortunately we must sychronize evaluations |
| // so that we can swizzle in the context. |
| // maybe we could create an expression from a context |
| // (and so create a BSFManager for a context) |
| synchronized (getRegistry()) { |
| getRegistry().setJellyContext(context); |
| |
| try { |
| // XXXX: hack - there must be a better way!!! |
| for ( Iterator iter = context.getVariableNames(); iter.hasNext(); ) { |
| String name = (String) iter.next(); |
| Object value = context.getVariable( name ); |
| manager.declareBean( name, value, value.getClass() ); |
| } |
| engine.exec(fileName, lineNumber, columnNumber, text); |
| } |
| catch (BSFException e) { |
| throw new JellyTagException("Error occurred with script: " + e, e); |
| } |
| } |
| } |
| |
| // Properties |
| //------------------------------------------------------------------------- |
| /** |
| * @return int |
| */ |
| public int getColumnNumber() { |
| return columnNumber; |
| } |
| |
| /** |
| * @return String |
| */ |
| public String getElementName() { |
| return elementName; |
| } |
| |
| /** |
| * @return BSFEngine |
| */ |
| public BSFEngine getEngine() { |
| return engine; |
| } |
| |
| /** |
| * @return String |
| */ |
| public String getFileName() { |
| return fileName; |
| } |
| |
| /** |
| * @return int |
| */ |
| public int getLineNumber() { |
| return lineNumber; |
| } |
| |
| /** |
| * Sets the columnNumber. |
| * @param columnNumber The columnNumber to set |
| */ |
| public void setColumnNumber(int columnNumber) { |
| this.columnNumber = columnNumber; |
| } |
| |
| /** |
| * Sets the elementName. |
| * @param elementName The elementName to set |
| */ |
| public void setElementName(String elementName) { |
| this.elementName = elementName; |
| } |
| |
| /** |
| * Sets the engine. |
| * @param engine The engine to set |
| */ |
| public void setEngine(BSFEngine engine) { |
| this.engine = engine; |
| } |
| |
| /** |
| * Sets the fileName. |
| * @param fileName The fileName to set |
| */ |
| public void setFileName(String fileName) { |
| this.fileName = fileName; |
| } |
| |
| /** |
| * Sets the lineNumber. |
| * @param lineNumber The lineNumber to set |
| */ |
| public void setLineNumber(int lineNumber) { |
| this.lineNumber = lineNumber; |
| } |
| |
| private JellyContextRegistry getRegistry() |
| { |
| return (JellyContextRegistry) this.manager.getObjectRegistry(); |
| } |
| } |