| /* |
| * Copyright 2004,2004 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.bsf.util; |
| |
| import org.apache.bsf.BSFEngine; |
| import org.apache.bsf.BSFException; |
| import org.apache.bsf.BSFManager; |
| import org.apache.bsf.util.event.EventProcessor; |
| |
| /** |
| * This is used to support binding scripts to be run when an event |
| * occurs. |
| * |
| * @author Sanjiva Weerawarana |
| */ |
| public class BSFEventProcessor implements EventProcessor { |
| BSFEngine engine; |
| BSFManager manager; |
| String filter; |
| String source; |
| int lineNo; |
| int columnNo; |
| Object script; |
| |
| /** |
| * Package-protected constructor makes this class unavailable for |
| * public use. |
| */ |
| BSFEventProcessor (BSFEngine engine, BSFManager manager, String filter, |
| String source, int lineNo, int columnNo, Object script) |
| throws BSFException { |
| this.engine = engine; |
| this.manager = manager; |
| this.filter = filter; |
| this.source = source; |
| this.lineNo = lineNo; |
| this.columnNo = columnNo; |
| this.script = script; |
| } |
| ////////////////////////////////////////////////////////////////////////// |
| // |
| // event is delegated to me by the adapters using this. inFilter is |
| // in general the name of the method via which the event was received |
| // at the adapter. For prop/veto change events, inFilter is the name |
| // of the property. In any case, in the event processor, I only forward |
| // those events if for which the filters match (if one is specified). |
| |
| public void processEvent (String inFilter, Object[] evtInfo) { |
| try { |
| processExceptionableEvent (inFilter, evtInfo); |
| } catch (RuntimeException re) { |
| // rethrow this .. I don't want to intercept run-time stuff |
| // that can in fact occur legit |
| throw re; |
| } catch (Exception e) { |
| // should not occur |
| System.err.println ("BSFError: non-exceptionable event delivery " + |
| "threw exception (that's not nice): " + e); |
| e.printStackTrace (); |
| } |
| } |
| ////////////////////////////////////////////////////////////////////////// |
| // |
| // same as above, but used when the method event method may generate |
| // an exception which must go all the way back to the source (as in |
| // the vetoableChange case) |
| |
| public void processExceptionableEvent (String inFilter, Object[] evtInfo) throws Exception |
| { |
| if ((filter != null) && !filter.equals (inFilter)) { |
| // ignore this event |
| return; |
| } |
| |
| // run the script |
| engine.exec (source, lineNo, columnNo, script); |
| } |
| } |