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Groovy example source code file (JsonDelegate.groovy)

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

Java - Groovy tags/keywords

closure, closure, jsondelegate, jsondelegate, object, object

The Groovy JsonDelegate.groovy source code

/*
 * Copyright 2003-2011 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.json

/**
 * Utility class used as delegate of closures representing JSON objects.
 *
 * @author Guillaume Laforge
 * @since 1.8.0
 */
class JsonDelegate {
    def content = [:]

    /**
     * Intercepts calls for setting a key and value for a JSON object
     *
     * @param name the key name
     * @param args the value associated with the key
     */
    def invokeMethod(String name, Object args) {
        if (args) {
            content[name] = args.size() == 1 ? args[0] : args.toList()
        }
    }

    /**
     * Factory method for creating <code>JsonDelegates from closures.
     *
     * @param c closure representing JSON objects
     * @return an instance of <code>JsonDelegate
     */
    static cloneDelegateAndGetContent(Closure c) {
        def delegate = new JsonDelegate()
        Closure cloned = c.clone()
        cloned.delegate = delegate
        cloned.resolveStrategy = Closure.DELEGATE_FIRST
        cloned()
        return delegate.content
    }
}

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