| /* |
| $Id$ |
| |
| Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved. |
| |
| Redistribution and use of this software and associated documentation |
| ("Software"), with or without modification, are permitted provided |
| that the following conditions are met: |
| |
| 1. Redistributions of source code must retain copyright |
| statements and notices. Redistributions must also contain a |
| copy of this document. |
| |
| 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 name "groovy" must not be used to endorse or promote |
| products derived from this Software without prior written |
| permission of The Codehaus. For written permission, |
| please contact info@codehaus.org. |
| |
| 4. Products derived from this Software may not be called "groovy" |
| nor may "groovy" appear in their names without prior written |
| permission of The Codehaus. "groovy" is a registered |
| trademark of The Codehaus. |
| |
| 5. Due credit should be given to The Codehaus - |
| http://groovy.codehaus.org/ |
| |
| THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS |
| ``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 CODEHAUS 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. |
| |
| */ |
| package org.codehaus.groovy.runtime; |
| |
| import groovy.lang.Closure; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| |
| /** |
| * A helper class used by the runtime to allow Groovy classes to be extended at runtime |
| * |
| * @author <a href="mailto:james@coredevelopers.net">James Strachan</a> |
| * @version $Revision$ |
| */ |
| public class ClassExtender { |
| private Map variables; |
| private Map methods; |
| |
| public synchronized Object get(String name) { |
| if (variables != null) { |
| return variables.get(name); |
| } |
| return null; |
| } |
| |
| public synchronized void set(String name, Object value) { |
| if (variables == null) { |
| variables = createMap(); |
| } |
| variables.put(name, value); |
| } |
| |
| public synchronized void remove(String name) { |
| if (variables != null) { |
| variables.remove(name); |
| } |
| } |
| |
| public void call(String name, Object params) { |
| Closure closure = null; |
| synchronized (this) { |
| if (methods != null) { |
| closure = (Closure) methods.get(name); |
| } |
| } |
| if (closure != null) { |
| closure.call(params); |
| } |
| /* |
| else { |
| throw DoesNotUnderstandException(); |
| } |
| */ |
| } |
| |
| public synchronized void addMethod(String name, Closure closure) { |
| if (methods == null) { |
| methods = createMap(); |
| } |
| methods.put(name, methods); |
| } |
| |
| public synchronized void removeMethod(String name) { |
| if (methods != null) { |
| methods.remove(name); |
| } |
| } |
| |
| protected Map createMap() { |
| return new HashMap(); |
| } |
| } |