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Groovy example source code file (

This example Groovy source code file ( is included in the "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

class, closure, closure, closuremodel, closuremodel, nestedvaluemodel, object, object, valuemodel, valuemodel

The Groovy source code

 * 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
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * 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="">James Strachan
 * @version $Revision: 7922 $
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 null;

    public void setValue(Object value) {
        if (writeClosure != null) {
            Object source = sourceModel.getValue();
            if (source != null) {
       Object[] { source, value });

    public Class getType() {
        return type;

    public boolean isEditable() {
        return writeClosure != null;

Other Groovy examples (source code examples)

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