| /* |
| * Copyright 2003-2007 the original author or authors. |
| * |
| * 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 groovy.model; |
| |
| import groovy.lang.Closure; |
| |
| /** |
| * Represents a value model using a closure to extract |
| * the value from some source model and an optional write closure |
| * for updating the value. |
| * |
| * @author <a href="mailto:james@coredevelopers.net">James Strachan</a> |
| * @version $Revision$ |
| */ |
| public class ClosureModel implements ValueModel, NestedValueModel { |
| |
| private final ValueModel sourceModel; |
| private final Closure readClosure; |
| private final Closure writeClosure; |
| private final Class type; |
| |
| public ClosureModel(ValueModel sourceModel, Closure readClosure) { |
| this(sourceModel, readClosure, null); |
| } |
| |
| public ClosureModel(ValueModel sourceModel, Closure readClosure, Closure writeClosure) { |
| this(sourceModel, readClosure, writeClosure, Object.class); |
| } |
| |
| public ClosureModel(ValueModel sourceModel, Closure readClosure, Closure writeClosure, Class type) { |
| this.sourceModel = sourceModel; |
| this.readClosure = readClosure; |
| this.writeClosure = writeClosure; |
| this.type = type; |
| } |
| |
| public ValueModel getSourceModel() { |
| return sourceModel; |
| } |
| |
| public Object getValue() { |
| Object source = sourceModel.getValue(); |
| if (source != null) { |
| return readClosure.call(source); |
| } |
| return null; |
| } |
| |
| public void setValue(Object value) { |
| if (writeClosure != null) { |
| Object source = sourceModel.getValue(); |
| if (source != null) { |
| writeClosure.call(new Object[] { source, value }); |
| } |
| } |
| } |
| |
| public Class getType() { |
| return type; |
| } |
| |
| public boolean isEditable() { |
| return writeClosure != null; |
| } |
| } |