    001    // Copyright 2007, 2008, 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.ioc.annotations;
    016
    017    import java.lang.annotation.Documented;
    018    import static java.lang.annotation.ElementType.FIELD;
    019    import static java.lang.annotation.ElementType.PARAMETER;
    020    import java.lang.annotation.Retention;
    021    import static java.lang.annotation.RetentionPolicy.RUNTIME;
    022    import java.lang.annotation.Target;
    023
    024    import static org.apache.tapestry5.ioc.annotations.AnnotationUseContext.*;
    025
    026    /**
    027     * Used in conjunction with {@link org.apache.tapestry5.ioc.annotations.Inject} to inject a literal value, rather than a
    028     * service. Symbols in the value are expanded and the resulting string is coerced to the desired type. For IoC, this
    029     * annotation is only applied to parameters (on service builder methods, and on service constructors); for components,
    030     * it may also be applied to field.
    031     *
    032     * @see org.apache.tapestry5.ioc.services.SymbolSource
    033     * @see org.apache.tapestry5.ioc.services.TypeCoercer
    034     */
    035    @Target(
    036            { PARAMETER, FIELD })
    037    @Retention(RUNTIME)
    038    @Documented
    039    @UseWith({COMPONENT,MIXIN,PAGE,SERVICE})
    040    public @interface Value
    041    {
    042        /**
    043         * The value to be coerced and injected.
    044         */
    045        String value();
    046    }