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.*;
018
019
020/**
021 * Used to guide Tapestry when coercing from a raw type to a field or parameter type, by forcing Tapestry to coerce to
022 * the intermediate type.  This was introduced to allow coercion from string to a time period (in milliseconds) via
023 * {@link org.apache.tapestry5.ioc.util.TimeInterval}.
024 *
025 * @see org.apache.tapestry5.ioc.annotations.Value
026 * @see org.apache.tapestry5.ioc.annotations.Symbol
027 */
028@Target({ ElementType.PARAMETER, ElementType.FIELD })
029@Retention(RetentionPolicy.RUNTIME)
030@Documented
031@UseWith(AnnotationUseContext.SERVICE)
032public @interface IntermediateType
033{
034    /**
035     * The intermediate to coerce through.
036     */
037    Class value();
038}