/*
 *  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

/**
 * Installs synthetic meta-methods used by Swing binding helpers.
 */
class AbstractSyntheticMetaMethods {

    /**
     * Adds any missing instance methods from the supplied map to the target object's meta-class.
     *
     * @param o the object whose meta-class should be enhanced
     * @param enhancedMethods method names mapped to implementation closures
     */
    static void enhance(Object o, Map enhancedMethods) {
        Class klass = o.getClass()
        MetaClassRegistry mcr = GroovySystem.metaClassRegistry
        MetaClass mc = mcr.getMetaClass(klass)
        boolean init = false
        mcr.removeMetaClass klass //??
        //if (!(mc instanceof ExpandoMetaClass)) {
            mc = new ExpandoMetaClass(klass)
            init = true
        //}
        enhancedMethods.each {k, v ->
            if (mc.getMetaMethod(k) == null) {
                mc.registerInstanceMethod(k, v)
            }
        }
        if (init) {
            mc.initialize()
            mcr.setMetaClass(klass, mc)
        }
    }
}
