/*
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2002 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", "Ant", 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/>.
*/
package org.apache.tools.ant.taskdefs.optional;
import com.ibm.bsf.BSFManager;
import com.ibm.bsf.BSFException;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Hashtable;
import java.util.Enumeration;
import org.apache.tools.ant.Task;
import org.apache.tools.ant.BuildException;
/**
* Executes a script.
*
* @ant.task name="script"
* @author Sam Ruby <a href="mailto:rubys@us.ibm.com">rubys@us.ibm.com</a>
*/
public class Script extends Task {
private String language;
private String script = "";
private Hashtable beans = new Hashtable();
// Register BeanShell ourselves, since BSF does not
// natively support it (yet).
// This "hack" can be removed once BSF has been
// modified to support BeanShell or more dynamic
// registration.
static {
BSFManager.registerScriptingEngine( "beanshell",
"bsh.util.BeanShellBSFEngine", new String [] { "bsh" } );
}
/**
* Add a list of named objects to the list to be exported to the script
*/
private void addBeans(Hashtable dictionary) {
for (Enumeration e = dictionary.keys(); e.hasMoreElements();) {
String key = (String) e.nextElement();
boolean isValid = key.length() > 0 &&
Character.isJavaIdentifierStart(key.charAt(0));
for (int i = 1; isValid && i < key.length(); i++) {
isValid = Character.isJavaIdentifierPart(key.charAt(i));
}
if (isValid) {
beans.put(key, dictionary.get(key));
}
}
}
/**
* Do the work.
*
* @exception BuildException if someting goes wrong with the build
*/
public void execute() throws BuildException {
try {
addBeans(project.getProperties());
addBeans(project.getUserProperties());
addBeans(project.getTargets());
addBeans(project.getReferences());
beans.put("project", getProject());
beans.put("self", this);
BSFManager manager = new BSFManager ();
for (Enumeration e = beans.keys() ; e.hasMoreElements() ;) {
String key = (String) e.nextElement();
Object value = beans.get(key);
manager.declareBean(key, value, value.getClass());
}
// execute the script
manager.exec(language, "<ANT>", 0, 0, script);
} catch (BSFException be) {
Throwable t = be;
Throwable te = be.getTargetException();
if (te != null) {
if (te instanceof BuildException) {
throw (BuildException) te;
} else {
t = te;
}
}
throw new BuildException(t);
}
}
/**
* Defines the language (required).
*
* @param msg Sets the value for the script variable.
*/
public void setLanguage(String language) {
this.language = language;
}
/**
* Load the script from an external file ; optional.
*
* @param msg Sets the value for the script variable.
*/
public void setSrc(String fileName) {
File file = new File(fileName);
if (!file.exists()) {
throw new BuildException("file " + fileName + " not found.");
}
int count = (int) file.length();
byte data[] = new byte[count];
try {
FileInputStream inStream = new FileInputStream(file);
inStream.read(data);
inStream.close();
} catch (IOException e) {
throw new BuildException(e);
}
script += new String(data);
}
/**
* The script text.
*
* @param msg Sets the value for the script variable.
*/
public void addText(String text) {
this.script += text;
}
}