    001    // Copyright 2006, 2009 The Apache Software Foundation
    002    //
    003    // Licensed under the Apache License, Version 2.0 (the "License");
    004    // you may not use this file except in compliance with the License.
    005    // You may obtain a copy of the License at
    006    //
    007    //     http://www.apache.org/licenses/LICENSE-2.0
    008    //
    009    // Unless required by applicable law or agreed to in writing, software
    010    // distributed under the License is distributed on an "AS IS" BASIS,
    011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    012    // See the License for the specific language governing permissions and
    013    // limitations under the License.
    014
    015    package org.apache.tapestry5.annotations;
    016
    017    import java.lang.annotation.Documented;
    018    import static java.lang.annotation.ElementType.FIELD;
    019    import java.lang.annotation.Retention;
    020    import static java.lang.annotation.RetentionPolicy.RUNTIME;
    021    import java.lang.annotation.Target;
    022
    023    import static org.apache.tapestry5.ioc.annotations.AnnotationUseContext.COMPONENT;
    024    import org.apache.tapestry5.ioc.annotations.UseWith;
    025
    026    /**
    027     * Used to attach one or more instance mixins to an embedded component. Each mixin is specified as a specific class.
    028     * This annotation is only recognized when used in conjuction with the {@link Component} annotation.
    029     *
    030     * @see Mixins
    031     */
    032    @Target(FIELD)
    033    @Documented
    034    @Retention(RUNTIME)
    035    @UseWith(COMPONENT)
    036    public @interface MixinClasses
    037    {
    038        Class[] value();
    039
    040        /**
    041         * Specifies the ordering constraints for each mixin specified by value. Order may be a 0-length array signifying
    042         * no ordering for any mixin specified by value.  Otherwise, it must be the same length as value.
    043         * Each String can specify multiple constraints, separated by ; (before:mixina;after:mixinb).
    044         * Alternatively, the entry may be null or the empty string to specify no ordering constraints for that particular
    045         * mixin.
    046         * @since 5.2.0.0
    047         */
    048        String[] order() default {};
    049
    050    }