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The coolest XML library for Java around. Define typesafe views (projections) to xml. Use XPath to read and write XML. Bind XML to Java collections. Requires at least Java6, supports Java8 features and has no further runtime dependencies.

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/**
 *  Copyright 2013 Sven Ewald
 *
 *  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 org.xmlbeam;

/**
 */
public interface MixinHolder {

    /**
     * Register a new mixin for a projection interface. By letting a projection extend another
     * interface you are able to add custom behavior to projections by registering an implementation
     * (called a mixin) of this interface here. A mixin is registered per projection type. Only one
     * mixin implementation per projection and mixin type is possible. All existing and all future
     * projection instances will change. Notice that you will break projection serialization if you
     * register a non serializeable mixin.
     * 
     * @param projectionInterface
     * @param mixinImplementation
     * @return this for convenience
     */
     XBProjector addProjectionMixin(Class projectionInterface, M mixinImplementation);

    /**
     * Get the mixin implementation registered for the given projection.
     * 
     * @param projectionInterface
     * @param mixinInterface
     * @return the registered mixin implementation. null if none is present.
     */
     M getProjectionMixin(Class
 projectionInterface, Class mixinInterface);

    /**
     * Remove the mixin implementation registered for the given projection.
     * 
     * @param projectionInterface
     * @param mixinInterface
     * @return the registered mixin implementation. null if none was present.
     */
     M removeProjectionMixin(Class projectionInterface, Class mixinInterface);

}