source: trunk/src/ws/fugue88/jpath/ImmutableMethodProperty.java

/*
 * Created on Mar 15, 2005
 *
 * $Log$
 * Revision 1.1  2005/08/03 00:35:29  dsowen
 * Initial commit.
 *
 * Revision 1.2  2005/04/10 19:48:29  dowen
 * Renamed package.
 *
 * Revision 1.1  2005/03/19 16:49:20  dowen
 * Initial commit.
 *
 */
package ws.fugue88.jpath;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

/**
 * @author dsowen
 */
class ImmutableMethodProperty implements Property {

        ImmutableMethodProperty(String name, Class clas, String get_method)
                        throws NoSuchMethodException
        {
                _name = name;

                _get = clas.getDeclaredMethod(get_method, null);
                _get.setAccessible(true);

                _type = _get.getReturnType();
        }

        public Class getType()
        {
                return _type;
        }

        public String getName()
        {
                return _name;
        }

        public Object getValue(Object that) throws InvocationTargetException
        {
                try {
                        return _get.invoke(that, null);
                } catch(IllegalAccessException e) {
                        throw new Error(e);
                }
        }

        public void setValue(Object that, Object value)
                        throws InvocationTargetException
        {
                throw new UnsupportedOperationException("Property '" + _name
                                + "' of class " + _type + "is read-only.");
        }

        private String _name;
        private Class _type;
        private Method _get;
}