/*
 * (c) Copyright BEA Systems, Inc., Cape Clear Software, International Business Machines Corp, Interface21, IONA Technologies,
 * Oracle, Primeton Technologies, Progress Software, Red Hat, Rogue Wave Software, SAP AG., Siemens AG., Software AG., Sybase
 * Inc., TIBCO Software Inc., 2005, 2007. All rights reserved.
 * 
 * see http://www.osoa.org/display/Main/Service+Component+Architecture+Specifications
 */
package org.osoa.sca.annotations;

import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.PARAMETER;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

import java.lang.annotation.Retention;
import java.lang.annotation.Target;

/**
 * Annotation used to indicate a constructor parameter, field or method that is used to inject a reference.
 *
 * @version $Rev$ $Date$
 */
@Target({METHOD, FIELD, PARAMETER})
@Retention(RUNTIME)
public @interface Reference {
    /**
     * The name of the reference. If not specified then the name will be derived from the annotated field or method.
     *
     * @return the name of the reference
     */
    String name() default "";

    /**
     * Indicates if a reference must be specified.
     *
     * @return true if a reference must be specified
     */
    boolean required() default true;
}