/*******************************************************************************
* Copyright (c) 2008-2010 Sonatype, Inc.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Sonatype, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.m2e.core.internal.project.registry;
import java.io.Serializable;
/**
* RequiredCapability
*
* @author igor
*/
public abstract class RequiredCapability implements Serializable {
private static final long serialVersionUID = -5445156687502685383L;
private final VersionlessKey versionlessKey;
public RequiredCapability(String namepsace, String id) {
if(namepsace == null || id == null) {
throw new NullPointerException();
}
this.versionlessKey = new VersionlessKey(namepsace, id);
}
public VersionlessKey getVersionlessKey() {
return versionlessKey;
}
/**
* Returns true if provided capability *potentially* satisfies this requirement. Capability/requirement match will be
* used to check if workspace project changes (new/changed/remove projects and metadata changes) affect other
* projects. isPotentialMatch Implementations should be good enough to avoid obviously pointless project dependency
* refreshes, but does not have to be perfectly precise.<br/>
*
* @param matchResolved is a hint that defines whether requirements can be narrowed down to a certain version of
* capability, e.g. resolved dependency
*/
public abstract boolean isPotentialMatch(Capability capability, boolean versionMatch);
protected static <T> boolean eq(T a, T b) {
return a != null ? a.equals(b) : b == null;
}
}