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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;
import org.apache.tuscany.sca.interfacedef.InterfaceContract;
import org.apache.tuscany.sca.policy.PolicySubject;
/**
* Represents a contract. A contract can be either a service or a reference.
*
* @version $Rev$ $Date$
* @tuscany.spi.extension.asclient
*/
public interface Contract extends AbstractContract, PolicySubject, Cloneable {
/**
* Returns the bindings supported by this contract.
*
* @return the bindings supported by this contract
*/
List<Binding> getBindings();
/**
* Return the named binding
*
* @return the named binding or null if it can't be found
*/
Binding getBinding(String name);
/**
* Returns a binding of the specified type or null if there is no such
* binding configured on this contract.
*
* @param <B> the binding type
* @param bindingClass the binding type class
* @return the binding or null if there is no binding of the specified type
*/
<B> B getBinding(Class<B> bindingClass);
/**
* Returns a callback binding of the specified type or null if there is no such
* callback binding configured on this contract.
*
* @param <B> the callback binding type
* @param bindingClass the callback binding type class
* @return the callback binding or null if there is no callback binding of the specified type
*/
<B> B getCallbackBinding(Class<B> bindingClass);
/**
* Returns a callback definition of the bindings to use for callbacks.
*
* @return a definition of the bindings to use for callbacks
*/
Callback getCallback();
/**
* Sets a callback definition of the bindings to use for callbacks
*
* @param callback a definition of the bindings to use for callbacks
*/
void setCallback(Callback callback);
/**
* Returns a clone of the contract.
*
* @return a clone of the reference
* @throws CloneNotSupportedException
*/
Object clone() throws CloneNotSupportedException;
/**
* Returns the interface contract given a binding. Important in the case where
* a reference with multiplicity > 1 has been promoted and has it's list of
* resolved bindings extended by a promoting reference. Here the binding
* from the promoting reference may need the interface contract from the
* promoting reference and not the promoted reference.
* TODO - remove this wrinkle with better endpoint support.
*
* @param binding the binding for which the interface contract is required
* @return the interface contract
*/
InterfaceContract getInterfaceContract(Binding binding);
/**
* A flag to tell if there are any binding elements specified for this service or reference.
* If true, they override the the bindings in the corresponding reference/service in the
* component type or promoted reference/service.
* @return
*/
boolean isOverridingBindings();
/**
* Set the flag depending on if there are any binding elements specified for this service or
* reference.
* @param overridingBindings true if there are binding elements specified
*/
void setOverridingBindings(boolean overridingBindings);
}
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