ASF_20_SRC_AUTO/src/blocks/scratchpad/java/org/apache/cocoon/acting/CommandAction.java

/*
 * Copyright 1999-2004 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.cocoon.acting;

import java.io.File;
import java.util.Map;

import org.apache.avalon.framework.parameters.Parameters;
import org.apache.avalon.framework.thread.ThreadSafe;
import org.apache.cocoon.environment.Redirector;
import org.apache.cocoon.environment.SourceResolver;
import org.apache.excalibur.source.Source;
import org.apache.excalibur.source.SourceUtil;

/**
 * Action class, which simply calls a process on an operating system.
 * Therefore, a parameter named 'command' has to be configured in the sitemap 
 * to hold the filename as value.
 * 
 * @author <a href="mailto:pklassen@s-und-n.de">Peter Klassen</a>
 * @version CVS $Id: CommandAction.java,v 1.2 2004/03/05 10:07:25 bdelacretaz Exp $
 */

public class CommandAction extends AbstractAction implements ThreadSafe {
	
	public final static String PARAM_COMMAND = "command";
	
	
    public Map act( Redirector redirector, SourceResolver resolver, Map objectModel, String source, Parameters param )
	throws Exception {
		String command = param.getParameter(PARAM_COMMAND);
		Source src = null;
		
		if ((param != null) && (command != null)) {
			try {
				src = resolver.resolveURI(command);
                File file = SourceUtil.getFile(src);
                if ( file != null ) {
                    Runtime.getRuntime().exec(file.getAbsolutePath());
                } else {
                    this.getLogger().error("Command does not point to a file " + command);
                }
			} catch(Exception e) {
				this.getLogger().error("Error while execute an OS-Process",e);
				return null;
			} finally {
				resolver.release(src);
			}
		}
		else {
			return null;
		}
        return(EMPTY_MAP);
    }

}