| // Copyright 2006, 2009, 2010 The Apache Software Foundation |
| // |
| // 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.apache.tapestry5.annotations; |
| |
| import static java.lang.annotation.ElementType.FIELD; |
| import static java.lang.annotation.RetentionPolicy.RUNTIME; |
| import static org.apache.tapestry5.ioc.annotations.AnnotationUseContext.COMPONENT; |
| import static org.apache.tapestry5.ioc.annotations.AnnotationUseContext.MIXIN; |
| import static org.apache.tapestry5.ioc.annotations.AnnotationUseContext.PAGE; |
| |
| import java.lang.annotation.Documented; |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.Target; |
| |
| import org.apache.tapestry5.ioc.annotations.UseWith; |
| import org.apache.tapestry5.services.javascript.JavaScriptSupport; |
| |
| /** |
| * Defines a field of a component class that is replaced at runtime with a read-only value obtained from the |
| * {@link org.apache.tapestry5.services.Environment} service. |
| * <p> |
| * Most commonly, the field will be of type {@link JavaScriptSupport}, {@link org.apache.tapestry5.services.Heartbeat} |
| * or {@link org.apache.tapestry5.services.FormSupport}, though many other options are possible. |
| */ |
| @Target(FIELD) |
| @Documented |
| @Retention(RUNTIME) |
| @UseWith( |
| { COMPONENT, MIXIN, PAGE }) |
| public @interface Environmental |
| { |
| /** |
| * The value determines if the environmental service to be injected is required or not. In most cases, it is, so the |
| * default is true. |
| */ |
| boolean value() default true; |
| } |