001 /** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.camel.language; 018 019 import java.lang.annotation.Documented; 020 import java.lang.annotation.ElementType; 021 import java.lang.annotation.Retention; 022 import java.lang.annotation.RetentionPolicy; 023 import java.lang.annotation.Target; 024 025 /** 026 * Used to inject a constant expression into a field, property, method or parameter when using 027 * <a href="http://camel.apache.org/bean-integration.html">Bean Integration</a>. 028 * 029 */ 030 @Retention(RetentionPolicy.RUNTIME) 031 @Documented 032 @Target({ElementType.FIELD, ElementType.METHOD, ElementType.PARAMETER }) 033 @LanguageAnnotation(language = "constant") 034 public @interface Constant { 035 String value(); 036 }