    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
    015package org.apache.tapestry5.ioc.annotations;
    016
    017import java.lang.annotation.Documented;
    018import static java.lang.annotation.ElementType.FIELD;
    019import static java.lang.annotation.ElementType.PARAMETER;
    020import java.lang.annotation.Retention;
    021import static java.lang.annotation.RetentionPolicy.RUNTIME;
    022import java.lang.annotation.Target;
    023
    024import 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})
    040public @interface Value
    041{
    042    /**
    043     * The value to be coerced and injected.
    044     */
    045    String value();
    046}