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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.tuscany.sca.assembly;
import java.util.List;
/**
* An instance of a reference associated with a particular component.
*
* @version $Rev$ $Date$
*/
public interface ComponentReference extends Reference {
/**
* Returns the reference defined by the implementation for this reference.
*
* @return the implementation reference
*/
Reference getReference();
/**
* Sets the reference defined by the implementation for this reference.
*
* @param reference the implementation reference
*/
void setReference(Reference reference);
/**
* Return the Boolean value of autowire
* @return null/TRUE/FALSE
*/
Boolean getAutowire();
/**
* Sets whether component references should be autowired.
*
* @param autowire whether component references should be autowired
*/
void setAutowire(Boolean autowire);
/**
* Returns the callback service created internally as a target endpoint
* for callbacks to this reference.
*
* @return the callback service
*/
ComponentService getCallbackService();
/**
* Sets the callback service created internally as a target endpoint
* for callbacks to this reference.
*
* @param callbackService the callback service
*/
void setCallbackService(ComponentService callbackService);
/**
* A boolean value, "false" by default, which indicates whether this component reference
* can have its targets overridden by a composite reference which promotes the
* component reference.
*
* If @nonOverridable==false, the target(s) of the promoting composite reference
* replace all the targets explicitly declared on the component reference for any
* value of @multiplicity on the component reference.
*
* If the component reference has @nonOverridable==false and @multiplicity 1..1
* and the reference has a target, then any composite reference which promotes
* the component reference has @multiplicity 0..1.by default and MAY have an explicit @multiplicity of either
* 0..1 or 1..1.
*
* If @nonOverridable==true, and the component reference has @multiplicity 0..1 or
* 1..1 and the component reference also declares a target, promotion implies
* that the promoting composite reference has @wiredbyImpl==true and the composite
* reference cannot supply a target, but can influence the policy attached to the
* component reference.
*
* If @nonOverridable==true, and the component reference @multiplicity is 0..n
* or 1..n, promotion targeting is additive
*
* @return
*/
boolean isNonOverridable();
/**
* Set the nonOverridable flag
* @param nonOverridable
*/
void setNonOverridable(boolean nonOverridable);
}
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