ObjectWrapperWithAPISupport.java

/*
 * Copyright 2014 Attila Szegedi, Daniel Dekany, Jonathan Revusky
 * 
 * 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 freemarker.template.utility;

import freemarker.template.ObjectWrapper;
import freemarker.template.TemplateHashModel;
import freemarker.template.TemplateModel;
import freemarker.template.TemplateModelException;

/**
 * <b>Experimental - subject to change:</b> Implemented by {@link ObjectWrapper}-s to help {@link TemplateModel}-s to
 * implement the {@code someValue?api} operation.
 * 
 * <p>
 * <b>Experimental status warning:</b> This interface is subject to change on non-backward compatible ways, hence, it
 * shouldn't be implemented outside FreeMarker yet.
 * 
 * @since 2.3.22
 */
public interface ObjectWrapperWithAPISupport extends ObjectWrapper {

    /**
     * Wraps an object to a {@link TemplateModel} that exposes the object's "native" (usually, Java) API.
     * 
     * @param obj
     *            The object for which the API model has to be returned. Shouldn't be {@code null}.
     * 
     * @return The {@link TemplateModel} through which the API of the object can be accessed. Can't be {@code null}.
     * 
     * @since 2.3.22
     */
    TemplateHashModel wrapAsAPI(Object obj) throws TemplateModelException;

}