/*
* 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.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>
*/
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(
source,
value);
}
}
}
public
Class getType() {
return
type;
}
public boolean
isEditable() {
return
writeClosure != null;
}
}