| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 groovy.swing.binding; |
| |
| import org.apache.groovy.swing.binding.AbstractFullBinding; |
| import org.apache.groovy.swing.binding.PropertyBinding; |
| import org.apache.groovy.swing.binding.SourceBinding; |
| import org.apache.groovy.swing.binding.TargetBinding; |
| |
| public abstract class AbstractSyntheticBinding extends AbstractFullBinding { |
| boolean bound; |
| String propertyName; |
| Class klass; |
| |
| public AbstractSyntheticBinding(PropertyBinding source, TargetBinding target, Class klass, String propertyName) { |
| this.propertyName = propertyName; |
| this.klass = klass; |
| bound = false; |
| setSourceBinding(source); |
| setTargetBinding(target); |
| } |
| |
| @Override |
| public void bind() { |
| if (!bound) { |
| try { |
| syntheticBind(); |
| bound = true; |
| } catch (RuntimeException re) { |
| try { |
| syntheticUnbind(); |
| } catch (Exception e) { |
| // ignore as we are re-throwing the original cause |
| } |
| throw re; |
| } |
| } |
| } |
| |
| @Override |
| public void unbind() { |
| if (bound) { |
| // fail dirty, no checks |
| bound = false; |
| syntheticUnbind(); |
| } |
| } |
| |
| protected abstract void syntheticBind(); |
| protected abstract void syntheticUnbind(); |
| |
| @Override |
| public void rebind() { |
| if (bound) { |
| unbind(); |
| bind(); |
| } |
| } |
| |
| @Override |
| public void setSourceBinding(SourceBinding source) { |
| if (!(source instanceof PropertyBinding)) { |
| throw new IllegalArgumentException("Only PropertySourceBindings are accepted"); |
| } |
| |
| if (!propertyName.equals(((PropertyBinding) source).getPropertyName())) { |
| throw new IllegalArgumentException("PropertyName must be '" + propertyName + "'"); |
| } |
| Object bean = ((PropertyBinding) source).getBean(); |
| if ((bean == null) || !klass.isAssignableFrom(bean.getClass())) { |
| throw new IllegalArgumentException("SourceBean must be a " + klass.getName()); |
| } |
| super.setSourceBinding(source); |
| } |
| |
| @Override |
| public void setTargetBinding(TargetBinding target) { |
| super.setTargetBinding(target); |
| } |
| } |