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/*******************************************************************************
* Copyright (c) 2000, 2015 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
* Sergey Prigogin (Google) - use parameterized types (bug 442021)
* Lars Vogel <Lars.Vogel@vogella.com> - Bug 478864
*******************************************************************************/
package org.eclipse.core.runtime;
/**
* An interface for an adaptable object.
* <p>
* Adaptable objects can be dynamically extended to provide different
* interfaces (or "adapters"). Adapters are created by adapter
* factories, which are in turn managed by type by adapter managers.
* </p>
* For example,
* <pre>
* IAdaptable a = [some adaptable];
* IFoo x = Adapters.getAdapter(a, IFoo.class, true);
* if (x != null)
* [do IFoo things with x]
* </pre>
* <p>
* This interface can be used without OSGi running.
* </p><p>
* Clients may implement this interface, or obtain a default implementation
* of this interface by subclassing <code>PlatformObject</code>.
* </p>
* @see IAdapterFactory
* @see IAdapterManager
* @see PlatformObject
* @see Adapters
*/
public interface IAdaptable {
/**
* Returns an object which is an instance of the given class
* associated with this object. Returns <code>null</code> if
* no such object can be found.
* <p>
* Clients may implement this method but should generally call {@link Adapters#adapt(Object, Class, boolean)}
* rather than invoking it directly.
*
* @param adapter the adapter class to look up
* @param <T> the class type
* @return a object of the given class,
* or <code>null</code> if this object does not
* have an adapter for the given class
*/
public <T> T getAdapter(Class<T> adapter);
}
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