JProperty.java

package org.objectweb.jonas.ant;

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.taskdefs.Property;

public class JProperty extends Property {

    private String internalValue = null;

    public void setValue(String value) {
        this.internalValue = value;
    }

    public void execute() throws BuildException {

        if (internalValue == null) {
            throw new BuildException("The property '" + internalValue
                    + "' was not set.");
        }

        String valueEvaluated = getProject().getProperty(internalValue);
        if (valueEvaluated == null) {
            throw new BuildException("The property '" + internalValue
                    + "' cannot be evaluated in the current project.");
        }

        // Set the value with the value evaluated
        super.setValue(valueEvaluated);

        // Now execute the super method
        super.execute();
    }

}

---