| /* |
| * Copyright (c) OSGi Alliance (2008, 2009). All Rights Reserved. |
| * |
| * 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.osgi.service.blueprint.reflect; |
| |
| /** |
| * Metadata for a factory method or constructor argument of a bean. The |
| * arguments of a bean are obtained from {@link BeanMetadata#getArguments()}. |
| * |
| * This is specified by the <code>argument</code> elements of a bean. |
| * |
| * @ThreadSafe |
| * @version $Revision$ |
| */ |
| public interface BeanArgument { |
| |
| /** |
| * Return the Metadata for the argument value. |
| * |
| * This is specified by the <code>value</code> attribute. |
| * |
| * @return The Metadata for the argument value. |
| */ |
| Metadata getValue(); |
| |
| /** |
| * Return the name of the value type to match the argument and convert the |
| * value into when invoking the constructor or factory method. |
| * |
| * This is specified by the <code>type</code> attribute. |
| * |
| * @return The name of the value type to convert the value into, or |
| * <code>null</code> if no type is specified. |
| */ |
| String getValueType(); |
| |
| /** |
| * Return the zero-based index into the parameter list of the factory method |
| * or constructor to be invoked for this argument. This is determined by |
| * specifying the <code>index</code> attribute for the bean. If not |
| * explicitly set, this will return -1 and the initial ordering is defined |
| * by its position in the {@link BeanMetadata#getArguments()} list. |
| * |
| * This is specified by the <code>index</code> attribute. |
| * |
| * @return The zero-based index of the parameter, or -1 if no index is |
| * specified. |
| */ |
| int getIndex(); |
| } |